Posts Tagged ‘air rifles’
by Tom Gaylord, a.k.a. B.B. Pelletier
This report addresses:
• The .22 rimfire ammunition supply problem in the U.S.
• One possible solution for an ammo supply
• A great substitution for .22 rimfire
Bricks of .22 rimfire ammo usually have 500 rounds, except the value packs that contain a little extra loose ammo.
The rest of the world may not be aware, but there’s an extreme shortage of .22 rimfire ammo in the United States at the present time. In my 66 years, the last two are the only time I could not walk into a gun store or even a discount store and buy a brick of .22 ammunition.
What’s a brick?
A brick is a carton of 500 rounds. It holds 10 boxes of 50 rounds and is called a brick for the general size, shape and weight of the box. There are also loosely packaged value packs that contain a few more than 500 rounds.
In 2012, a brick of inexpensive .22 ammo cost around $9 to $10, depending on the sale. The nominal price was about $20, but everybody knew that was too much to pay, so we all waited for the sales. Only when our backs were up against it did we bite the bullet (pun intended) and pay full price.
Today, the street price of a brick is $50, but that’s only when you can find one for sale. Many of the stores are now rationing sales with limits on the number of smaller boxes you can buy at one time. Buying whole bricks is pretty much a thing of the past.
I’ve purchased single bricks from Midway for $29 in the past year, but they limit your purchase to just one; and when they add the mandatory $27 HAZMAT fee and shipping, the price increases greatly. If they would sell entire cases of .22 (5,000 rounds), the fees and shipping would disappear in the volume. But that isn’t going to happen anytime soon.
Plenty of .22
There’s no shortage of .22 rimfire ammo in the U.S. The ammo plants are working 3 shifts each day to supply all they can. And the government is no longer buying everything they make. What we have is a run on ammo that cannot be satisfied in the near term. The so-called shortage is being caused by hoarding. This is the reason I reload. I can load .45 ACP rounds for much less than the current cost of .22 long rifle. But .22 is a lot of fun to shoot!
Strategies for getting bricks
You can watch the obituaries and attend the estate sales, but that’s where everybody goes. I would make friends with the supply sergeants! That’s what I did in the Army. Supply sergeants are in control of everything, so go right to the source!
In the civilian world, the supply sergeants are the clerks who work in the gun stores and sporting goods departments of the larger stores. Cozy up to them, and they may let you jump to the front of the line when ammo comes in. I’m not talking about stealing here — I’m talking about being first in line — even before the line forms! When you want something that’s hard to get, this is how it’s done.
But wait — there’s hope!
Actually, this report isn’t about .22 ammo at all. It’s about what can substitute for it. When I was at the Flag City Toys That Shoot airgun show last Saturday, a lot of people were talking about it.
If you just shoot to plink, an air rifle is just as good as a rimfire out at 75 yards. You can go out even farther, but I’m trying to stay conservative. Yes, a lot of air rifles are single-shots, but there are also a lot that are repeaters. And the cost, while higher than the cheap rimfire rifles, isn’t that bad. Especially, since the guns you get for that price will shoot rings around most rimfires out to 50 yards.
A couple years ago, I remember listening to some airgunners bemoan the fact that Crosman Premiers in the cardboard box cost more than $20. You get 625 pellets in that box if they’re .22s and 1,250 if they’re .177s. That was when budget bricks were still selling for $9-10. But those days are over and will never return. When this shortage is finally over, I predict the price of a budget brick will be somewhere around $29-$36, and the sales may lower that to $25 on occasion. That’s just a prediction, of course.
Can a pellet rifle equal a .22 long rifle?
The answer is both yes and no. The new Escape survival rifle from AirForce Airguns produces almost 98 foot-pounds of energy at the muzzle when the heaviest .25-caliber Eun Jin pellet is used. That compares favorably to a standard speed or subsonic .22 long rifle cartridge. It’s not quite as powerful, but it’s very close. So, yes, a pellet rifle can equal a .22 rimfire.
But, when you drive that pellet that fast, you don’t get all the accuracy that rifle has to offer. You saw that when I tested the Escape. At max power, that large pellet gave me a 2.48-inch 5-shot group at 50 yards. But when I throttled the gun back and shot JSB Exact King pellets, 5 of them went into 0.715 inches at the same 50 yards.
The fill pressure for that smaller group was just under 2,000 psi, and the power was set at 6 — so the rifle was probably producing around 40 foot-pounds. Before you sneer with derision, because that’s less than half what the gun can do at its best, remember that 40 foot-pounds is still more than a lot of PCP rifles can get when they’re shooting full-out. And that’s my point. Understand what it is that you’re talking about. Yes, a pellet rifle can meet the power of a .22 long rifle, but no, it can’t do it with the same accuracy. Maybe someday in the future, but not today.
Do you really need all that power, or have you fallen into the trap of defining your minimum shooting experience based on what’s out there? Are you a guy who just has to hunt deer with a .30-06 because that’s what “everyone” does, or are you someone who thinks a .28-30-120 might just be the best deer cartridge ever for shots under 100 yards? Don’t ask me what a .28-30-120 is — look it up on the internet and gain some wisdom.
Do airguns replace rimfires?
No! And they never will. There will always be a place for a rimfire or two (or more) in my gun closet. But I’m not going to go out and shoot up all my ammo and then whine about it when I own a battery of fine pellet rifles.
I shoot from 100 to 1,000 shots each and every week of my life, with few exceptions. Most of those shots are with airguns. I do enjoy firearms and I frequently shoot them, and rimfires are among the most fun of all; but I don’t allow the current ammunition shortage to hinder my shooting one bit. I’m an airgunner!
by Tom Gaylord, a.k.a. B.B. Pelletier
Today’s report is a guest blog from reader duskwight. It’s about how and why to clean airguns. It’s longer than our usual blog posts and filled with lots of info you’ll need.
If you’d like to write a guest post for this blog, please email me.
What we put into our airguns — and what it puts into their barrels
Everybody knows we shoot lead. So-called “ballistic alloys” are a poor substitute for it, so let’s all pretend that we shoot lead.
Lead is a soft, malleable metal — so malleable that a pellet’s skirt blows out when hit by compressed air and presses into rifling. It’s also so soft that during the Middle Ages it was used for pencils, as it leaves dark lines on paper or parchment or human hair! Yes, people made lead combs to dye their beards and hair while combing them — they didn’t live that long back then, anyway. Remember that, though, and wash your hands thoroughly, especially when you’re covered with a lead and oil cocktail, because it’s readily absorbed.
So, lead leaves traces of itself on things. Sometimes, it leaves even more than traces — as in whole deposits of lead. Just imagine a lead pencil drawing a line all along the inside of your barrel, and you’ll get the picture. Freshly exposed lead is so shiny and bright — it’s also quite sticky and shaves off your pellets to form thin (foil-like) deposits inside your barrel. It looks like tiny shavings or scales, pressed and stuck onto the metal.
Of course, that’s not all. Some pellet makers use graphite dust to prevent pellets from sticking to each other inside their tins. Some use different types of grease (e.g., tiny amount of petroleum jelly dissolved in a good amount of solvent to form a thin coat after a short wash) to prevent them from oxidizing while being stored. Some use both. There’s all sorts of lead dust and tiny shavings of lead coming off pellets. The better the quality of your pellets, the less dirt they bring with them. But they’re all dirty. And compressed air, especially in a magnum springer, carries tiny amounts of grease, fat and oil to combust — creating different sorts of tar and carbon for the barrel.
And there’s other bad stuff inside, but only for CO2 guys. Carbon dioxide cools as it expands rapidly in the barrel, and it condenses out some tiny amount of water from the air. It can also contain some water of its own. Carbon dioxide plus water is unstable carbonic acid H2CO3 (fizz water anyone?). It is a rather weak acid; however, it’s still an acid.
What it means for your rifle or pistol
The rule is simple. You shoot, and you foul your barrel. It’s inevitable, just like every breath you take brings some very strong oxidants into your lungs.
Then comes the next rule — dirty barrels tend to make you miss. This is simple, too. Compare it to driving on a highway or autobahn (in case you use German-made barrels) — that’s a clean barrel — versus country roads beaten up by tractors and ill repairs — that’s a dirty barrel. Deposits in your barrel make your pellet’s ride unstable. What’s worse is when the deposits collect near or on the crown. They force the pellet to leave your barrel with an unequal force on all sides, making it prone to tumbling, less stable and imprecise. They can also deform or mar the surface of your pellet, affecting aerodynamics and hurting accuracy.
Match-grade barrels with polished grooves collect less lead. Poorly manufactured barrels with “cheese-grater” surfaces scrape off more. Polygonal or segmental rifling tends to catch and hold less lead than classic Ballard rifling because of fewer cutting edges, lower lands and less spaces for lead to stick. The smoother your airgun shoots — the less brute force is applied to the pellet, the less fouling is left. Springer super magnums seem to be the champions of brute force (which makes them lose accuracy soonest). Choked barrels tend to catch more lead in the choke; barrels that are straight cylinders tend to get dirty more uniformly.
The main thing to learn from all this is that there’s no certain equation between the number of shots and aforementioned effects. Every barrel and every rifle has its own character and own number of shots to get dirty. For example, my Feinwerkbau C62 Luft needs 2,500 shots to get dirty, while my modified Gamo CFX with Lothar Walther barrel gets 500-520 shots before it needs to be cleaned. My Feinwerkbau 300S likes to be cleaned every 1200 shots (although I suspect that’s me being paranoid, not exactly the rifle’s barrel). An IZH 60 I have seems to have no limit at all. That’s what you get with segmental rifling and low power. However, the same modified Gamo CFX with the same Lothar Walther barrel (except for the wood) I made for my friend wants to be cleaned after every 550-600 shots. And another buddy’s FWB C62 wants cleaning after 2,000 shots.
Keep in mind that I use just 4 different types of pellets for my fleet – all of them are .177. Multiply that by the number of rifles — each of them can (and probably will) like its own sort — H&N, JSB, CP, Eun Jin, etc. — and calibers — .177, .20, .22, .25, .30. Don’t go crazy doing this. Learn your guns, get intimate with them and know their habits and likes.
Oh, you’ll know when the barrel finally gets dirty! Your perfectly tightened, perfectly tuned and sighted airgun starts to spit like a mad camel! Pellets start to fly chaotically, hitting where you don’t want them.
If you’re lucky (which means you have a “predictable” barrel), the accuracy fall-off will start sharply — just 5 or 10 shots, and it’s shooting horribly. If you’re not so lucky, it will drag along for 50 or more shots, with some being better and others worse. Up and down you’ll go — getting tighter then trashier groups. Anyway, it will happen. That tells you things got dirty, and it’s time to clean.
Some shooters clean after every session. Some clean according to a regular preventive schedule — when the shot count comes to the predetermined number of shots. And others just wait until the inaccuracy gets obvious. I’m somewhere between the second and third type. I don’t like to disturb barrels too often.
What we clean
Airgun barrels are made of steel or brass. Steel is tougher, yet it’s not the same kind that’s used for powder-burners. It’s softer and of a simpler composition, not chromed and so on. Brass is even softer and less durable, but it has a lower friction coefficient with lead and tends to collect less lead than a steel barrel.
A good clean airgun barrel looks like mirror — shiny and amplifying light. Dirty barrels look dusty, and their insides look smoky and blackened. Some even drop lead dust when shaken.
What to use for cleaning — and what not to
The rule in this case sounds like that – nothing can enter the barrel that’s harder or as hard as the barrel metal. The worst thing that can happen to your barrel is a damaged crown. That’s a death sentence for your barrel’s accuracy.
So, steel rods and steel brushes go directly to trash for both steel and brass barrels. [Note from B.B.: Some gunsmiths recommend a one-piece polished steel cleaning rod for cleaning steel barrels. They claim it doesn't harm the barrel because it's smooth.]
Steel rods coated with plastic are good. Brass rods are good for steel, but not for brass. Wooden rods — if you can find one in .177 caliber — are ok. Plastic rods are ok too. Different kinds of cloth “snakes” are also ok.
Brushes are usually made of one of three materials — brass, plastic or cotton (they call the cotton ones mops). Brass on brass doesn’t play; save it for your steel barrels. The rest are OK.
Patch-holding tip — get a brass one for steel barrels and aluminum alloy for brass barrels.
Felt patches — I use them for quick cleaning or refreshing the barrel on the range. I load 2 dry with 1 wet between them, and a pellet behind all of it to give a springer something to push against and save the optics — or nothing in case of a PCP. But that’s not proper cleaning, no matter what the ads say.
Thin cotton cloth — clean old t-shirt is quite ok; special wads are too posh for true tough guys (any dry cotton is OK).
As for oil — I prefer Ballistol. Nothing too special, and it does the job right. I also use WD-40 for CO2 guns — as a preventive to get rid of water.
A word of caution about oils. Make sure they don’t get into any place where there’s compression, especially when it comes to sprays. In the case of springers, they can cause intense dieseling — or even detonation — and broken seals and springs. In the case of single-strokes or multi-pumps, you can get yourself a very nice tiny working diesel engine — and some purple-black blood-blistered fingers for your troubles.
Do not use silicone oils. Just don’t — they’re simply not for cleaning metal. [Note from B.B.: Silicone oil is used to seal pistons. It doesn't lubricate, it seals.]
Ah, and one more thing. You need a tiny and very bright single, white LED flashlight to check the barrel’s condition. This is a useful amateur gunsmith tool.
Getting things done
Brass barrels are exotic these days. If you have one — use a plastic brush.
Steady your rifle, preferably in the horizontal mode. The less bend you’ll give to your rod, the better.
Close all the glass optics with covers. Should I remind you that your rifle must be uncocked, unloaded, de-pressurized and checked twice for maximum safety?
It’s best to clean the barrel from breech to muzzle. Well, I think that’s a bit of a superstition. With good equipment and steady hands you can clean it in the reverse direction — and you often have to. Especially, since some guns do not give you easy access to the rifle’s breech.
Let’s say we have a VERY dirty steel barrel on our hands. Don’t laugh — it happens! Put a brass brush on your rod. For brass barrels (they’re hard to get this dirty), use only plastic brushes. Spray it with Ballistol to wet the brush.
Drag your brass brush along the barrel 5-10 times. Not fast, not slow — just calm and steady. The brass brush will scratch all the big lead deposits off barrel walls and won’t hurt your steel barrel.
WATCH OUT FOR RUBBER RINGS AND OTHER DAMAGEABLE STUFF INSIDE THE BARREL AND PAST THE BREECH.
Now, wait for a couple minutes. Then, screw your patch-holding tip onto the rod. Get some cotton onto it or use a patch of cotton cloth. It must sit tight inside the barrel. Spray some Ballistol to make it wet. Run it 5-10 times through the barrel in both directions. Take it out and say, “Eek!” It should be black with some tiny, shiny flakes of lead.
Change the cloth or cotton and repeat 5-10 times. Aaah…now it comes out dark grey. Change patches again. This one comes out light grey. Change and clean until it comes out white. This alone works fine for regular cleaning if your barrel doesn’t tend to get extremely dirty.
Congratulations, you just got yourself a nice, clean barrel. However, you must finish the job.
Use a loosely woven dry cloth or cotton on your patch-holding tip or use a cotton brush to dry the barrel. Don’t be afraid. One run will not leave the barrel dry, it will leave just the right amount of oil that you need in metal pores and on its surface. You’ve heard the expression, “A light coat of oil?” That doesn’t refer to a wardrobe choice.
Then, if you like — shoot 3-5 pellets into a pellet trap to season the barrel. This will give you a thin film of lead that gives the barrel its standard accuracy and voila! Your barrel is ready to punch hundreds more precise and clean holes in paper.
For polished match barrels that are not very dirty, I use the method of some Olympic airgun shooters. It puts minimal (well, they are prone to overplaying safe) influence on the barrel and makes things extremely right and tender.
Get a fishing line – very good stuff to clean match barrels. I prefer 0.40mm Japanese line. Get 5-6 feet, fold in two, knot, pass through the barrel, loop outside the breech, knot outside the muzzle. Put a narrow strip of cloth into the loop (in my case — 6″ long, 1/5″ wide, 2 loops for .177), soak it with Ballistol, put the rest of the cloth over your fingers (as fishing line DOES cut!) and just pull steadily and slow. This will drag the cloth through the barrel and clean it. Repeat with wet cloths until it comes out white. Finish with one dry patch. Perfectly clean!
There’s another kind of problem with CO2 guns that I mentioned before — water and carbon acid. To maximize your CO2 gun’s service life (don’t consider it to be just a plinker — FWB and Walther made some Olympic CO2 match rifles, and the Hämmerli 850 AirMagnum is a serious piece even by today’s standards), depressurize it and apply some WD-40 into the barrel with a cotton brush or patch-holding tip and cotton cloth after every session. This will get the water out of the pores and preserve it from rust. The same goes for shooting PCPs and springers in misty or high-humidity outdoor conditions.
And a finishing touch — gently rub your rifles steel parts with a soft cloth, slightly wet with oil. Congratulations — you’re done!
by Tom Gaylord, a.k.a. B.B. Pelletier
Best airgun show I have been to in a very long time! Not because I sold a lot — I didn’t. But I met a lot of nice blog readers, got to see some airguns that are extremely rare and got to acquire a couple nice vintage guns for future blogs.
Dennis Quackenbush told me this show would be a good one, and he was right. As soon as the doors opened to the public, the place was packed. From what I saw, people had money to spend and weren’t afraid to pull it out.
The Findlay show is very heavy into vintage BB guns; so if that’s what you like, it’s one of the 2 best shows for that. But they weren’t all Daisys. There were many other rare models, including a super-rare Quackenbush Lightning.
A table loaded with Quackenbush airguns! John Groenewold, who wrote the book “Quackenbush Guns,” had tables at the show.
The Quackenbush model zero, also called the Lightning, uses rubber bands to power the sliding compression chamber that moves on the fixed barrel. It’s the rarest model, with fewer than 10 complete guns known.
I mentioned there were rare airguns at this show. That Quackenbush Lightning was one of them, but there was another that I was shown privately. It is a Giffard Deluxe Target model that, until I saw it, was unknown to me. The owner, who is an advanced collector and asked for privacy, graciously allowed me to photograph the rifle.
You’re looking at the action of an 8mm Giffard Deluxe Target rifle that may be the only one in the U.S. Giffards are not common, but this one is virtually unknown!
This rifle is almost entirely hand made. Gold inlays on the barrel tell you the care they put into it. A rifle like this cost three times what a regular Giffard cost at the time (1870s & ’80s)!
The bottom of the triggerguard of this special target rifle is actually a palm rest for offhand shooting!
They went on and on…
Being at this show was like taking a stroll through Dr. Arni Dunathan’s book, The American B.B. Gun. At every turn, you saw cast iron and folded-metal BB guns from the genesis of the sport/hobby! You had to be there to appreciate it completely, but trust me when I tell you this show was a treat for the American BB gun collector.
Atlas, Matchless, Columbians — the guns in this photograph are worth a fine used car!
Not everything was old
Toward the end of the show, Dennis Quackenbush asked me to come to his table and photograph a rifle he had just delivered. When I got there, I saw a rifle unlike anything Dennis has ever made. It’s a muzzleloader that he usually will not produce for reasons of safety — a slight air leak at the breech could fire the bullet into the shooter as he is loading it in the barrel, or anytime afterward.
This muzzleloader by Quackenbush is stunning! The owner put a vintage-looking Malcom scope on top to complete the image.
I recently shared with you a story about my first AirForce rifle. It had no power adjustment wheel, so I put an o-ring under the top hat to “tune” it. Those were the days. Well, imagine my surprise to see the old girl on a friend’s table at this show! He had added a wood stock to her, and it was like seeing your old girlfriend necking in the back seat of a convertible with somebody else!
This was my first AirForce rifle. It has no power adjustment and the wood stock parts are new; but underneath, I still recognize her.
Then, my friend told me something wonderful. He said that I could have my old Air Arms Schamal back for what he paid! Some of you know this rifle is one of the most accurate air rifles I’ve ever shot, plus it has a gorgeous walnut stock with presentation grain.
My wife, Edith, has promised that she will buy back the Shamal for my birthday later this year. Naturally, I’ll give you a complete report!
Besides the guns, the best thing about this show was the people I met. When he introduced himself as Twotalon, I walked around the table and hugged the man we all know so well through the pages of this blog. He was there with Mrs. Twotalon, who was gracious enough to smile and put up with the boring minutiae us two old codgers shared.
Twotalon and his wife stopped by my table and introduced themselves.
That triggered a rush of blog readers, who came so fast and furious that I failed to keep track. But Derrick is one reader I met years ago at a Pyramyd Air function. He updated me on what he’s doing these days. Before he left the show, he laid two air pistols on my table and told me to give them to young shooters! Shades of my late friend, Mac, who often did the same thing.
Derrick — I gave those guns to the show organizer, Dan Lerma, who knows a lot of deserving young people, several of whom were helping run this very show! I know they will find a good home.
As the crowd was building at my table, Mitchell from Dayton came by and introduced himself. He wanted an autograph on his Blue Book of Airgun Values, which I was happy to do. But he told me he was at this show to find his longtime dream gun — an FWB 300! There were several on different tables, and I pointed him toward them; but when he returned in half an hour, it wasn’t an FWB he was carrying. He had an Anschütz 380 in his hands! Now, that’s a fine target rifle, as well; but then he flipped over the rifle and showed me the real reason he bought it. Someone had skillfully carved a ram’s head on the right side of the butt, and he was completely taken with the art!
This ram’s head carving on the stock of the Anschütz 380 clinched the deal for Mitchell of Dayton. I can understand the attraction!
Before I go…
There will be at least one more section of this report, but I want some time to process all that happened at the show. However, if I can leave you with one key memory, it would have to be just prior to the opening of the doors when all the dealers stood as the Boy Scouts installed the National and Ohio State flags in the hall — and then several hundred Americans pledged allegiance to the flag. That was followed by a brief prayer of thanksgiving for this wonderful event that was about to unfold.
Sort of says it all, doesn’t it?
by Tom Gaylord, a.k.a. B.B. Pelletier
Today, I’m starting a long series on lubricating airguns. Blog reader Joe asked for this; but as I was researching the subject, I stumbled across another request that came in through the customer reviews on the Pyramyd Air website:
“I wish that RWS or Pyramydair would explain the process and frequency of oiling these RWS rifles in particular the RWS mod 48. Everyone I talk with says the RWS owners manual is outdated and that with the new seals they use does not need to be lubed maybe for years….I purchase the RWS chamber and cylinder oil at a cost of almost $30.00 and now am told I probably will never need it? This topic should be cleared up once and for all by the manufacturer.”
Perhaps this customer is referring to RWS Chamber Lube and RWS Spring Cylinder Oil as the two products he purchased. And they do add up to $28 before shipping. Are they necessary? Should he have bought them? That’s the question I’ll start answering today.
This subject is so vast and complex that I cannot address it in a single report. In today’s report, I’m only going to look at lubricating the piston seal. That constitutes about half of the lubrication requirements for many airguns, in my opinion. In the next installment, I’ll address all other spring gun lubrication, including the mainspring and piston.
Leather piston seals
In a spring gun, the piston seal is what compresses the air when the gun fires. As the piston goes forward, the seal keeps the air in front of the piston, where it gets compressed because the only escape is blocked by the pellet sitting in the breech. If the gun’s working properly, all other avenues for the compressed air to escape have been blocked.
In the past, pistons were sealed with a leather pad or cup. Leather is an ideal material for this job. It’s rugged, lasts a long time and will conform to the shape of the compression chamber after a few shots — much like a leather shoe that eventually fits your foot perfectly.
This cup-shaped leather piston seal is for a Chinese spring rifle.
To do its job, a leather seal has to stay soft and pliable, and oil is the best thing for this. As the spring gun operates, a little of the oil is consumed with each shot, so a leather seal needs to be oiled frequently to stay soft. How frequently? In some older guns, I’ve found that oiling every few weeks is necessary if they’re shot a lot. Certainly, all guns with leather seals need a couple drops of oil at least once each month if they’re to be shot. You can leave a gun with leather seals unoiled for years if you don’t shoot it; but before you start shooting it again, that seal needs to be oiled. When I start shooting an older gun that I know has leather seals (I use references for finding out things like this), I put about 10 drops of oil through the air transfer port and let it soak into the seal for at least an hour, although a half day is even better.
What oil to use?
The type of oil you use depends on the velocity of the gun. Guns that shoot less than 600 f.p.s. in both .177 and .22 caliber will be oiled with regular household oil. Any petroleum-based lubrication oil will do. Yes, gun oil will also work. For guns that shoot faster than 600 f.p.s., I use silicone chamber oil, like the product listed above. The spring cylinder oil is not for chambers and should not be used on the piston seals of these guns.
Starting in the 1950s, manufacturers began experimenting with piston seals made from synthetics. Some of them, like the ones used by Anschütz and Falke, worked well and lasted for many decades. But others, such as the seals used by Walther on all their airguns and the seals that Feinwerkbau used on the 121 and 124/127 sporting rifles, were made from a material that dry-rotted within about 20 years. If they were oiled by anything, they failed even faster. These seals started out as a light beige color, but as they absorbed oxygen and oil, it turned them dark yellow and brown until they began to break apart in waxy chunks.
Diana was one of the last companies to switch from leather to synthetic, and they had the benefit of watching the others. They were still using leather seals in their powerful model 45 rifle in the late 1970s, at a time when that airgun had broken the 800 f.p.s. “barrier.” When they started making synthetic piston seals, they used a blue-colored material that was tough and long-lasting. It’s interesting to note that the others adopted similar piston seal material when they finally realized their seals were perishing in use.
The blue Diana parachute seal is so rugged that hobbyists use it for many other airguns. It needs very little oil!
These 2 FWB 124 seals are made from modern synthetic material, yet they look like the original ones. The one on the right has been inside a rifle for a few thousand shots. It looks bad but is still in great shape and will last for many decades.
Don’t fixate on the color blue for piston seals! These synthetics can be colored any way and still be fine. I have modern FWB 124 seals that look similar to the old seals in color, yet they’ll last indefinitely. It’s the material, not the color.
Which oil to use?
With synthetic seals, I always use silicone chamber oil. That’s SILICONE CHAMBER OIL — not brake fluid, silicone spray lubricant or any other concoction. Chamber oil is for piston seals. It does not lubricate metal parts because the viscosity is too low. It’ll ruin metal parts if you use it that way. On the other hand, nobody knows what will happen to a gun that’s lubed with anything other than SILICONE CHAMBER OIL.
Diana recommends using two drops of chamber oil on the piston seal every 1,000 shots, and one drop on the breech seal at the same time. That’s it. To answer the person who asked if he needs the chamber oil, the answer is yes. But one small bottle will last a long time. I’ve observed that most Diana airguns can get by with even less oiling than what’s recommended. One diagnostic for when a gun need its seal oiled is when the seal honks like a goose as the gun is cocked.
Silicone chamber oil has a high flashpoint. Since the air in a spring-piston gun reaches about 2,000˚F with every shot, this is important. This heat is adiabatic — it doesn’t heat the gun because the interval is too brief.
Overlubing vs. underlubing
It’s almost impossible to overlube a leather piston seal. And it does not harm the seal if you do.
On the other hand, overlubing a synthetic seal can start the gun detonating. Not dieseling — most spring guns diesel. When you smell burning oil, your gun’s dieseling. Dieseling is just a few oil droplets vaporizing with each shot. It’s perfectly normal in a spring gun.
Detonation is when a lot of droplets vaporize and cause an explosion. That will damage your piston seal if it’s allowed to continue for a long time. It can also break your mainspring.
So, dieseling is okay, but detonations are bad. And overoiling synthetic seals causes detonations.
Do you see why I had to cover just the piston seals today?
by Tom Gaylord, a.k.a. B.B. Pelletier
This is a third look at the Disco Double shooting at 50 yards. All I’ve managed to do so far is demonstrate the Disco Double is very consistently mediocre with the best pellets — JSB Exact Jumbo RS domes. However, the last time I was out at the range with this rifle, I finally did what the builder, Lloyd Sikes, has been telling me to do all along. He said to tighten the 6 screws on the 2 barrel bands or hangers, and this time I followed his directions. Guess what? Four of the 6 screws were loose! Imagine that! I tightened them and knew the rifle would reward me for the effort.
It was no surprise when shot the best 10-shot group ever with the rifle. Ten RS pellets went into 1.195 inches at 50 yards. But I was 3 shots into a second group when the bolt handle broke off in my hand during cocking. That ended the day for this rifle.
As soon as I returned home, I emailed Lloyd, who put a new bolt and handle in the mail right away. I really wanted to finish the test before leaving for the Ohio airgun show (which is this Saturday), so I disassembled the rifle. I ran into a problem getting the old bolt out, but a call to Lloyd set me on the right path and soon the job was done.
The new parts arrived the following week, and I had them in the rifle inside an hour — though another call to Lloyd was necessary. He was most helpful, and I resolved my problem with a minimum of fuss. The rifle went back together, and I was ready to return to the range.
This time, I took the opportunity to mount a new UTG 6-24X56 scope scope in place of the UTG True Hunter 3-9X40 scope I took off. Naturally, the target image was much larger with this scope, which just made my job easier.
I tried several pellets that I’ve tried before, but once more this rifle demonstrated that it likes the JSB Exact Jumbo RS pellets the best. Since the rifle had been taken apart for the bolt repair (i.e., both barrel bands had been removed), I was back at the beginning on the first group. I had the front band about where it had been before (from the screw marks in the paint), and the first group of 10 went into 1.28 inches at 50 yards. That was marginally better than the 1.317-inch group I’d gotten during the previous full test, but not quite as good as the one group I shot just before the bolt broke (1.193 inches). All the screws were tight, so now it was time to move the front barrel band.
In case you don’t understand what moving the front barrel band has to do with accuracy, it comes down to harmonics. By changing the location of where the barrel is anchored, I changed how the barrel vibrates during the shot. I did a huge 11-part test of this effect a few years ago. You can read about it here.
I moved the front barrel band backwards about a half inch and tightened the 3 screws once more. Then, I fired another group of 10 shots. This time, 10 RS pellets went into 0.816 inches. That’s pretty telling, don’t you think? Of course, I have no way of knowing if I have the barrel band adjusted perfectly — all I know is that it’s better than it was before.
A second 10-shot group went into 1.506 inches. Oops! Was that supposed to happen? Its difficult to say, but perhaps I wasn’t concentrating while shooting this group. I simply don’t know. Stuff happens to me, just like anyone else!
So I shot a third 10-shot group. This one measures 0.961 inches between centers. That’s better.
What I can tell you now is the that Disco Double is able to put 10 pellets into less than an inch at 50 yards under ideal conditions. I’ve shown you everything that’s happened, and I could go on and continue to test this rifle until I have it shooting its best. I probably will, in fact. But the lesson is what I’ve shown you today.
The Benjamin Discovery is an inexpensive PCP that can put 10 pellets into less than one inch at 50 yards under ideal conditions. The Disco Double I am testing for you here has a lot of extra work done to it and is not as inexpensive as the basic Discovery. However, this is the air rifle I wanted. It’s small, it’s accurate, it has a wonderful trigger and this one gets a load of shots on a fill of just 2,000 psi. That’s everything I wanted in a PCP.
Best of all, this rifle weighs no more and is no larger than a standard Discovery. Despite the additional air capacity, I had to sacrifice nothing. That was the real reason I had this air rifle built. Lloyd Sikes has a wonderful thing going here. If you’re interested in what he can do for you, find him at Airgun Lab.
by Tom Gaylord, a.k.a. B.B. Pelletier
Today’s report is a guest blog from reader RifledDNA, a.k.a Stephen Larson. He wants to give us his impressions of a new Benjamin NP Limited Edition he recently received.
If you’d like to write a guest post for this blog, please email me.
Over to you, RifledDNA!
Good-day everybody. Today, we’re going to take a look at the Benjamin NP Limited Edition. These are my impressions of this airgun as I’ve unboxed it. Others may have different results, as no two airguns are the same.
To start, let’s look at what the NP Limited Edition is. This is a .22-caliber breakbarrel air rifle powered by Crosman’s Nitro Piston, hence the NP designation. The Nitro Piston is a nitrogen gas-filled piston that has many advantages over the traditional coiled steel spring powerplant. First, a gas piston is less affected by temperature. The nitrogen gas continues to compress and expand consistently even when the temperature drops. A steel spring is coated with lubricants that stiffen and do not want to move as fast in cold temperatures.
Another advantage of the Nitro Piston is less wear and tear. The gas piston has straight forward and back motion, so there’s no torque on parts. A coiled steel mainspring doesn’t just expand when it decompresses — it also twists because it’s coiled. That twisting is transmitted to the parts like the piston and spring guide, causing them to bear against other parts as they move.
Finally, the gas in the piston always has the same amount of mass. That means the gas will have the same expansion characteristics, providing long-lasting consistency.
The consistency of a gas piston is shown by the 10-for-$10 test I ordered with the gun. With 11.9-grain RWS Hobby pellets, the velocities were as follows:
After the first three shots, which was burning off the oil, this gun has very tight velocities right out of the box. If we exclude the first three, we get a high of 808, a low of 797, a spread of 11 f.p.s. and a standard deviation of only 5.16. I think that’s pretty impressive!
Another thing that impresses me is the cocking effort. It is SMOOTH! I don’t have a bathroom scale, but I would estimate it’s somewhere close to 28 lbs. My wife can cock it without much of a struggle! That’s not something commonly found in a magnum .22 springer.
Now that we’ve talked about the pros of this air rifle, lets look at the things that weren’t so impressive. When I bought it, the gun cost $179.99. That’s extremely affordable for a gun of this quality; but this great gun has to rest somewhere, and that’s in the stock. The stock used for this air rifle is the same synthetic stock that carries the Crosman Fury and Phantom. It’s an extremely lightweight stock that has a modified Monte Carlo cheekpiece and a long, curved pistol grip. This isn’t the right stock for the NP Limited Edition.
The Benjamin NP Limited Edition is really just the Benjamin NPS in a cheaper stock. The problem is that the NPS stock has a very pronounced pistol grip, and the metal parts of the gun are configured for it.
With the Fury’s stock, the trigger is noticeably too far forward. The curved pistol grip is also fat; and with the trigger further forward, you are literally reaching for the trigger, which is also boxy and fat. You cannot get a solid purchase on the trigger. All you get is the side of the square trigger blade. So, I decided to do some trigger modification.
Do trigger work at your own risk! That being said, the first thing I did to modify anything on this gun was to shape and thin the trigger blade on a grinding wheel. With that done, and my elbow up above my ear, I can finally get a solid wrap on it.
In a nutshell, the NP Limited Edition is a great , but the price you pay — or rather the money you save — is felt in the stock. I contacted Crosman about options for different stock. The gun is worth finding a new stock that compliments it better.
I don’t have the space to do an accuracy test, but the gun is accurate, powerful, quiet and smooth. Overall, I’m satisfied. Based on the reviews of this gun, I knew the money I was saving was in the stock. I’ll look into a custom wood stock. It’s really worth it.