Tech Force TF79 Competition Rifle – Part 6

by B.B. Pelletier

Part 1
Part 2
Part 3
Part 4
Part 5

The Tech Force 79 Competition rifle is a lot of value for a very low price.

Before we begin today, I wanted to remind you of the 2nd Annual Airgun Extravaganza in Malvern, Arkansas. It’s being held on Friday and Saturday, April 15 & 16. Contact Seth Rowland for more infomation.

Seth has made a deal with a couple motels. Mention the show and you’ll get a discount:
Comfort Inn Malvern, 501-467-3300: Thurs. $55, Fri. $65
Holiday Inn Malvern, 501-467-8800: Thurs. $85, Fri. $90

Make reservations now because they may fill up since the show’s being held on the same weekend as the Arkansas Derby. I have two tables reserved, and the Lord willing I’ll be there with Mac.

Now, for today’s report. From time to time, I’m asked to verify some facts by testing airguns in a certain way. Reader Victor questioned the accuracy claim for the Tech Force 79 Competition Rifle in the last report, and rightly so. It said the rifle is capable of a 5-shot group measuring 0.08 inches at 10 meters — something that the world’s top 10-meter rifles of today still struggle to achieve. I reckoned that the number had been mistakenly carried over at Compasseco in the past from the Chinese BS-4 target rifle that is a near-perfect copy of the FWB 300. That one really was capable of stunning accuracy. When Pyramyd Air purchased Compasseco, they used that description and this detail was never questioned. Given the large number of products that had to be added to Pyramyd Air’s website, it’s easy to see why not.

However, my struggles with the TF-79 during accuracy testing caused Pyramyd Air’s leadership to examine the rifle more critically, and this past week I was asked to establish a new accuracy figure for the rifle — one that’s realistic. Also, one that we know can be obtained. Since I spent an entire morning testing this rifle again, I darned sure was going to get a blog out of it!

I already had a great target from the RWS R-10 Match Heavy pellets. I showed it to you in the last accuracy report, so it became the group to beat. Remember, I’m testing just one rifle. Others may be more accurate and some may be less accurate, and there’s nothing anyone can do about it. No dealer can give you absolute accuracy information for every rifle with every possible target pellet. It simply takes too long. Even the $3,000 rifles are tested with only one pellet. To do otherwise would add hundreds of dollars to the cost of the gun, and would still be meaningless, since at any time a better pellet could come along.

Lest any of you get on the “machine rest” bandwagon at this point, that’s not how 10-meter guns are tested at any factory. They’re tested by human shooters, shooting off a rest. The one time I actually used a machine rest (a heavy machinist’s vise) was at AirForce, testing the Edge, and the results were no better than if I’d held the rifle myself. So, get off the machine rest/vise kick. It just isn’t done in the real world in the interest of time, and it isn’t necessary.

Having said all that from my bully pulpit, I also must admit that the people who test 10-meter rifles at the factories in Germany and Austria are the closest thing to vices that still have a heartbeat. They get real good at what they do, and you can see it in the tiny groups they send with their rifles. On the other hand, I’m just an average joe. I know how to shoot. When I get in the zone, I can even shoot pretty well. But I’m not the equal of the guys who test Olympic-grade 10-meter rifles for a living.

For this test, I had to get into the zone and stay there throughout the test. And THAT, my friends, is where the value of shooting the Ballard .38-55 centerfire target rifle comes in! You may recall that in my last outing to the range, I discovered the zone for the Ballard, and the last two targets showed it most dramatically. With that experience fresh in my mind, it was easy to get into the zone with the TF-79. I think you’ll see that my results prove it.

The target to beat is the best one I shot in the last test. That was with RWS R-10 Match Heavy pellets and measured 0.244 inches across the centers.

The best group of five pellets at 10 meters with the TF-79 rifle being tested was this group of RWS R 10 Heavy pellets. It measures 0.244 inches across the centers.

Pyramyd Air asked me to do a comprehensive test of H&N target pellets (they’re the U.S. importer). I did test other pellets, as well, but 14 groups of H&N pellets were fired during this test. All pellet head sizes of every pellet used in this test were 4.50mm. While other sizes exist, nearly everything I have on hand has that same head size. The JSB S100 pellet (4.52mm head) that I tested in this rifle in the last test made a poor showing. I’m thinking this may be the best head size for this rifle. That’s just a guess, since there’s simply not enough time to test all of the 50+ tins of target pellets I have on hand.

H&N Finale Match Rifle pellets
First, I tested H&N Finale Match Rifle pellets. I thought they might be the most accurate because of their weight of almost 8.2 grains. The TF79 is a powerful 10-meter rifle and needs (may need?) a heavier pellet to gain consistency.

The best target of the session was the very first one fired! Five H&N Finale Match Rifle pellets went into this group measuring 0.269 inches between centers.

The worst of five targets shot with H&N Finale Match Rifle pellets measures 0.395 inches between centers.

All my guessing turned out to be wrong. The H&N Match Rifle pellet had a wider spread of accuracy than some others. It averages 0. 33825 inches for five groups. That’s not a great showing in light of what was to come.

H&N Finale Pistol Match
H&N Finale Match Pistol pellets were next — and they surprised me.

The best groups of H&N Finale Match Pistol pellets measures 0.296 inches between centers.

The worst target of H&N Finale Match Pistol pellets measures 0.353 inches between centers.

The average of all four H&N Finale Match Pistol targets was 0.31775 inches. That’s significantly better and more uniform than the Finale Match Rifle pellets. Even though the Finale Match Rifle pellets had the single best group of the session, all of the Finale Match Pistol pellet groups were better than all but two of the five Finale Match Rifle groups.

H&N Match Pistol pellets
Next I tried H&N Match Pistol pellets. They lack the Finale name and are a couple dollars cheaper per tin, so I assume they’re made with less precision.

This best group of H&N Match Pistol pellets measures 0.318 inches between centers.

This worst group of H&N Match Pistol pellets measures 0.507 inches between centers.

As you can see, the targets of the H&N Match Pistol pellets varied widely in accuracy. They averaged 0.39567 inches for all groups shot.

I also shot a special hunting pellet that’s currently a secret but will be revealed soon. I’ve been testing this pellet under various different circumstances, and in this test it surprised me by turning in the second-best group of the entire test!

A surprise was this single group of five special hunting pellets that averaged 0.279 inches between centers.

I won’t tell you what pellet is is, yet. When it comes to market, I’ll direct your attention back to this group.

The bottom line of this test is that the TF79 shoots pretty much the same as I tested it last time. By concentrating on H&N pellets, I did manage to show their performance in far greater detail. The RWS R10 pellets are still the best in this particular rifle, and 0.244 inches is still the best group I’ve shot with it. I did shoot one group of R10 pellets in this test and got a group measuring 0.30 inches between centers, so it’s still a very consistent performer.

I was entirely in the zone throughout the test, and only one target had to be thrown out because of technical difficulties (sighting variations) that were noted. So, we’re going to show the potential accuracy of this rifle to be 0.244 inches. Some may be better than that, of course, and others may not be as good.

Also, you get a bonus out of this. After this exhaustive test, I got out four vintage world-class 10-meter air rifles and went to town, just to make sure I still know how to shoot air rifles. You’ll get to see the results of that on Friday.

Tech Force TF79 Competition Rifle – Part 5

by B.B. Pelletier

Part 1
Part 2
Part 3
Part 4

The Tech Force TF79 Competition rifle is a lot of value for a very low price.

Today is the day of redemption for the Tech Force 79 Competition Rifle. You may recall that in Part 4 I turned in an accuracy test that didn’t exactly stir the masses with its brilliance. In short, it was pretty mediocre for a gun calling itself a competition rifle. I cleaned the barrel and did a few other minor things, but that rifle just didn’t cut it, so it was exchanged for another that I tested for you. And, since I already know how this is going to turn out, I can tell you that this rifle shows what the TF-79 is really capable of.

Good trigger out of the box
On the first rifle, I had to adjust the trigger, so that procedure was turned into Part 2, stretching the report a little. But the current rifle came out of the box with the trigger in a very nice place. Very crisp and repeatable, so I did nothing to it.

Sight adjustments were crisper
I also mentioned that the rear sight on the first rifle had mushy adjustments. The rear sight on this rifle was similarly mushy, but only through the first time it was adjusted. Once the sight had covered the adjustment range, it went back and forth with positive clicks and crispness I could feel. Maybe it’s a good idea to run the adjustment all the way in both directions to clear the mechanism before you try to use the sight.

Let’s go!
Without any fanfare, the rifle was loaded with two CO2 cartridges and readied for shooting. All shooting was done off a rest at 10 meters, and the targets were the official NRA 10-meter targets.

H&N Finale Match Pistol pellets
Sight-in took five shots, and I started with H&N Finale Match Pistol pellets because they seemed right for the rifle. As in the previous report, I shot five-shot groups. I wasn’t too concerned with the pellets hitting the exact center of the bullseye, as long as they were in the black. Once I was in the black, I didn’t adjust the sights for any of the pellets.

Now that is more like it. Five H&N Finale Match Pistol pellets. Group measures 0.379 inches.

RWS R-10 Match Heavy pellets
Next, I tried RWS R-10 Match Heavy pellets. They gave me a super group and turned out to be the best pellet I tried. They have a head size of 4.50mm.

That’s more like it. Five RWS R-10 Match Heavy pellets. Group measures 0.244 inches. This turned out to be the best group in the test.

JSB S-100 Match pellets
After that, I tried some JSB S100 Match pellets. These are hand-sorted by weight at the factory. Pyramyd Air doesn’t stock them at the present time, but I have found them to be superb in some target rifles. They have a head size of 4.52mm.

Five JSB S100 Match pellets were disappointing. The group measures 0.438 inches.

RWS Hobby pellets
RWS Hobby pellets were next. You may remember that they were the most accurate pellets in the first rifle. In this rifle, they didn’t do as well, and that’s why we have to test every airgun with every pellet before knowing how it’s going to perform.

Not a very good group, although I know what some of you are thinking. You see four shots in a tight group and wonder if the other shot to the right is a flier. Well, it wasn’t called by me. The group measures 0.577 inches, and the four tight shots measure 0.257 inches.

Something different
Many shooters would be inclined to follow up on those Hobbys, giving them more chances to prove themselves. Allow me to explain why I didn’t. Hobby pellets are not made to match pellet standards, so even if I did get a couple wonderful groups from them, I could never trust them enough to use them in a match. Since matches are what this rifle is about, I left the Hobbys and decided to do something different.

that’s why we have to test every airgun with every pellet before knowing how it’s going to perform

Do pellets “condition” the bore?
Many readers of this blog and some other airgunners have stated they believe pellets condition a bore. The more you shoot them in a particular gun, the better they do. I don’t have an opinion about this yet, so I decided to see if it could be demonstrated. I returned to the RWS R-10 Match heavy pellets and shot four more groups. Here they are.

This second group of RWS R-10 Match Heavy pellets measures 0.354 inches.

This third group of RWS R-10 Match Heavy pellets measures 0.27 inches. It’s the second-tightest group of the test.

This fourth group of RWS R-10 Match Heavy pellets measures 0.294 inches.

This fifth group of RWS R-10 Match Heavy pellets measures 0.345 inches between centers.

From the above results, I would have to say that no “conditioning” effect is demonstrated. That doesn’t answer the question, because one test isn’t enough. It’s just a single data point that I hope to add to over the coming months.

The average spread of all five R-10 groups is 0.3014 inches. Only two of the groups were larger than that, so the tendency of the R-10 is to group under 0.30 inches in this rifle.

The bottom line on the TF-79
After today’s test, I would definitely recommend this target rifle to anyone who wants to shoot 10-meter or even informal target shooting out to any reasonable range. The trigger is wonderful; and as we’ve seen today, the accuracy is also quite good. Who knows if the four pellets I tested were the best for this rifle? The gun’s at least as accurate as I’ve shown and most probably more so.

I’ll still test the rifle on bulk-fill for you. I received the correct hose to bulk-fill from a 20-lb. tank (a fire extinguisher) with this rifle. Since I already have one of them, please allow me to test it that way. That way, I won’t have to shell out money for a paintball tank adapter. Back in my day in the 1990s. 20-lb. CO2 tanks were how we filled bulk CO2 guns, so this is historically accurate.

I’ll have a word with Pyramyd Air about changing over to a paintball tank adapter for this series of rifles, because in today’s world that does make more sense. I think they will go for it because they sell paintball tanks already filled. The fill procedure is the same regardless of the tank size, because CO2 is a self-regulating gas.