Posts Tagged ‘Gamo Smooth Action Trigger’
by Tom Gaylord, a.k.a. B.B. Pelletier
Today will be a very interesting report, in my opinion. The Gamo Whisper Fusion IGT air rifle I’m testing turns out to be a fascinating airgun in many ways. Let’s get right to the report.
Today we will look at accuracy at 25 yards with the scoped rifle. The first thing I had to do, therefore, was mount the scope. The rifle came with a scope installed in a one-piece scope mount. Its vertical scope stop pin was already correctly adjusted to fit the stop pin hole in the raised mount on top of the rifle’s spring tube. That is rare, in my experience. Normally, the scope will be installed correctly in the mount but has to be taken out of the mount to sufficiently adjust the height of the stop pin.
I’d used this mount for my report on shimming scope rings, so I did remove the scope from the rings after all. Following that report, I left in the one shim that was shown in the report. The mount Gamo included with the test rifle has four screws per cap and seems to be a good one. It’s a one-piece design that does limit the positioning of the scope, but I was able to locate it fine for my use.
The adjustable cheekpiece helped a lot. I had it adjusted up to almost the top position, and my eye lined up with the rear of the scope with no unnatural repositioning of my head.
Surprise No. 2 was the scope. I initially sight-in at 12 feet to get the shots safely on paper, and inexpensive scopes are usually very blurry this close to the target — even if they’re set on low power. This rifle comes with a very nice Gamo 3-9X40 scope that was quite clear on 3x at 12 feet. Back up to 25 yards and boost the power to 9x, and the glass remains very clear. It’s been a long time since I liked a scope that came bundled with a gun as much as this.
The Smooth Action Trigger (SAT)
Next, I must comment on Gamo’s new SAT. It’s a 2-stage unit that has a light first stage and a second stage that you can feel as you continue to pull. The trigger blade moves through stage 2 smoothly and breaks cleanly, but not with the sudden glass-rod crispness we talk about all the time. Instead, the feel is one of movement that is predictable and can be controlled. It isn’t bad — it’s just different from other triggers.
I reported in Part 2 that the trigger breaks at 3 lbs., 12 oz. That may sound high if you read about PCP triggers breaking at less than a pound, but it really isn’t that bad. The thing to do is experience it for yourself before you judge it. I find it to be manageable and not at all troublesome to the best accuracy.
The light weight of the rifle, on the other hand, does present something of a problem. This rifle is so light that even when the off hand touches the triggerguard, the rifle still has neutral balance. It floats in your hand. That makes it difficult to hold on the target because the crosshairs want to dance around. The solution is a very light artillery hold that does benefit the rifle’s accuracy, and I’ll address that in a moment.
Normally, this is where I launch into the accuracy test and start making comments about the groups. This time, I have more to say, and it isn’t just about the groups — except how they helped my understand the rifle in a diagnostic way.
JSB Exact RS
The first pellet tested was the JSB Exact RS that did so well in the 10-meter accuracy test with open sights. I knew from that test that these pellets like to be seated flush with the breech for best results.
As I shot these pellets, I saw a strange phenomenon unfold. The first 3 shots were out of the bull at 5 o’clock. Then, I relaxed very consciously and allowed the rifle to float on my off hand. The next several shots went into the black. On shot 8, I didn’t relax like I should have, and I threw 1 more shot out of the bull at 5 o’clock with the first 3. How interesting!
It was so interesting, in fact, that I shot a 14-shot group, so that 10 of the shots could be fired with me being very relaxed. When you look at where they landed, you can see that the hold was all-important to where this rifle grouped.
Now that I knew something about how the rifle performed, I figured I could do a lot better. And the very next group confirmed that.
H&N Barcuda Match
Next up were the H&N Baracuda Match pellets that shot second-best in the 10-meter accuracy test. Now that I knew how to hold the rifle, I expected to see a better group. And that’s exactly what happened.
I adjusted the scope after finishing the first group, moving it a few clicks to the left. The first Baracuda Match landed at 11 o’clock, just outside the bull. Shot No. 2 hit at 8 o’clock outside the bull. I was obviously holding the rifle too tight, so I made a conscious effort to hold it looser and shots 3 through 7 hit inside the black. Then, I tensed up again, sending shot No. 8 into the same hole as shot 2. The final 2 shots were fired with complete relaxation, and I had a respectable group inside the bull to the left of center.
This time, there were only 3 shots that missed the main group, and all of them were fired with some tension in the hold. When I relaxed, I was able to put 7 shots into 0.789 inches. I think this represents the true accuracy potential of the rifle. Total group measures 1.995 inches.
Altering the hold
Now that I understood the rifle better, I decided to move my open palm out farther so I could feel the cocking slot. Sometimes, resting the rifle this far forward is better. It certainly makes it more stable.
This time, however, there was no improvement. The group opened up, and I could see no way of controlling where the shots went. The total group measures 1.754 inches between centers, which is tighter than the previous group overall; but there’s no tighter group within this group that tells me the rifle wanted to do any better. Although this is a smaller group, I think the previous group that was shot with the off hand touching the triggerguard shows more promise. So, I went back to the other hold for the next group.
Two pellets I didn’t try were RWS Superdomes and Gamo Raptor PBA. Both had done so poorly in the 10-meter test that I felt it wasn’t worth the time to try them again at 25 yards. That’s one of the benefits of 10-meter testing — it eliminates some pellets.
But I wanted to try at least one more pellet, so I selected 7.9-grain Crosman Premier domes, simply because they’re often very accurate in spring guns.
I now knew the best hold for the rifle, so all I had to do was hold it as loosely as possible and let the pellets do the rest. Nine of the 10 pellets went into a nice group measuring 0.845 inches between centers. It was the first shot that opened it up to 1.596 inches.
I find it interesting that the early shots were always thrown wide of the main group. By the time I arrived at the third pellet, I managed to keep the wide shots to 1 in 10. That tells me something. It tells me that the Gamo Whisper Fusion IGT is a rifle that has to be learned. Once you’ve done so, I believe that your groups will be about the same size as the smaller groups seen here.
I’m going to say something that may surprise some of you. I really like this air rifle a lot. I think it is too light and the trigger takes some getting used to, but in the end this is a great budget air rifle. It really isn’t that fussy, once you learn how to hold it the right way.
For some of you, even a used Beeman R9 is too expensive. I think you may want to look at the Whisper Fusion IGT. This is a gas-spring air rifle that has not gone overboard in the power department. It has a usable trigger, and it’s reasonably quiet and accurate. No, it isn’t as accurate as an R9, nor is the SAT as nice as a Rekord trigger; but for those who want to cap their outlay for an air rifle at $260 with a scope included, I think this is the one.
by Tom Gaylord, a.k.a. B.B. Pelletier
This is the first accuracy report for the .177-caliber Gamo Whisper Fusion IGT air rifle. I shot this test using the open sights at 10 meters from a rest. I did that because I usually don’t have much luck with powerful gas-spring air rifles. They tend to spray their pellets all over the place. And getting a scope mounted and stable can also be a problem, so I wanted a track record for the rifle before I got to any of that.
Smooth Action Trigger
I usually wait until the accuracy test to report on how well the trigger, which in this instance is the Smooth Action Trigger (SAT), performs. The pull weight, measured in part 2, releases at 3 lbs., 12 oz. It’s a 2-stage trigger with a second stage that needs some explanation. Instead of pausing at stage 2 and then breaking cleanly, the trigger on the test rifle — and I must assume on all SAT — pulls through stage 2. You can feel the trigger move, yet there’s no creep. The pull is — well — smooth! And it’s predictable. It’s a different sort of feel from other triggers but not different in a bad way. I don’t think anyone will need to buy an aftermarket trigger when they have a rifle with the SAT installed. Well done, Gamo!
I also thank Gamo for making the safety manual. It does not come on when the rifle is cocked. That makes the shooting progress that much faster and with less for the shooter to do. It’s a small thing, but one that I noticed and must comment on it.
Feel of the rifle
This is a very light air rifle, yet the stock is shaped so your off hand goes to a spot immediately in front of the triggerguard. The rifle is so light that this still gives it a neutral balance, but it hangs right in the hands and feels good on the shoulder. The more-vertical pistol grip has something to do with the good feel, as well.
I did find the stock stinging my cheek with each shot, however. It served as a reminder to hold the rifle even lighter than I was, which is a good thing. Once I did that, there was no more stinging.
I sighted-in the rifle with JSB Exact RS pellets and discovered that the front sight was too high for a 6 o’clock hold on the 10-meter pistol bullseye target I was using. So, I did something I’ve never before tried. I’ll illustrate the sight picture I used.
As you can see, I placed the front bead at the top inside of the bullseye. The bull was so well lit that the bead showed up as black on gray. Maybe this isn’t the best open sight picture, but it seemed to work well enough for this test.
JSB Exact RS
The first pellet I tried was the JSB Exact RS dome. We know it’s often a good pellet — especially in lower-powered air rifles, which the Fusion IGT certainly is not. In this gun, the RS develops 14.32 foot-pounds, which puts it into the medium power group. If you’re a hunter, that’s where you want to be, so long as the rifle is also accurate.
The RS pellet put 10 shots into a nice round group that measured 0.591 inches between centers. While that isn’t a spectacular 10-meter group, it’s good when you consider the novel sight picture I was using. I’ll keep the RS in mind when I back up to 25 yards and mount a scope.
The next pellet I tried was the RWS Superdome. This pellet generates 15.43 foot-pounds of muzzle energy. Ten shots made a group measuring 1.332 inches. But it’s the shape of the group that’s really interesting! Five of the pellets landed in a very vertical group, while the other 5 made a beautiful small round group of their own. This target demonstrates why 10-shot groups are better than 5-shot groups because many shooters would just accept those 5 close shots and be done with it. I don’t think the Superdomes are right for this rifle based on all 10 shots.
H&N Baracuda Match
Many shooters think that heavy pellets are bad for spring guns. They’re supposed to damage the coiled steel mainspring. I wonder what they do to a gas spring like this IGT? That’s my way of saying I don’t think pellet weight is that much of a problem in a springer. Baracuda Match pellets average 824 f.p.s., for 16.06 foot-pounds of muzzle energy. Impressive power. If they’re also accurate, this will be a good pellet for the rifle.
And, accurate they are! Ten H&N Baracuda Match pellets went into 0.625 inches at 10 meters. That’s a pretty impressive group, considering the strange sight picture I’m using. It’s only slightly larger than the JSB Exact RS group, and I think these pellets have earned a spot in the 25-yard test, as well. I have no idea of why they’re spread out horizontally. When I checked the stock screws, all were tight.
Gamo Raptor PBA
The last pellet I tested was the Gamo Raptor PBA that Gamo uses to get the velocity out of this powerplant. Raptors go an average 1,232 f.p.s. and produce 18.2 foot-pounds of muzzle energy. That’s the best performance I saw from this rifle…alas, they aren’t accurate. Ten made a groups measuring 1.118 inches at 10 meters.
PBA pellets also cracked like .22 long rifle rounds because they broke the sound barrier. The noise, alone, would keep me from shooting them.
Evaluation so far
This rifle has plenty of good in its favor. The hold is good, the cocking is light for the power and the trigger is very nice. I’ll withhold my final opinion until I see how it does at 25 yards; but if this was any indication, this could be a best buy.
by Tom Gaylord, a.k.a. B.B. Pelletier
Today, we’ll look at the velocity and power of the Gamo Whisper Fusion IGT air rifle. This breakbarrel rifle has a gas spring that seems to intrigue many new airgunners, so let’s talk about that first. A gas spring is a unit that uses compressed gas rather than a coiled steel mainspring to power the piston. Besides that, it’s identical to a conventional spring-piston powerplant.
What’s in a name?
There are many names for the gas spring. Some call it a gas strut, others call it a gas ram, but all these names refer to the same thing. We’re talking about a mechanical device that contains compressed air or other gas (Crosman uses nitrogen — hence Nitro Piston) to push the piston. When the gun is cocked, the piston unit is pushed backwards — making the compressed gas reservoir shorter. When the gas chamber inside the piston becomes smaller, it causes the internal pressure to rise. When the gun fires, this compressed gas pushes the piston forward, and the piston seal compresses the air in front of it.
None of the gas inside the gas spring mechanism escapes. It remains inside, where it can be used again and again. Gas springs are found on modern cars — holding open the heavy back decks and front hoods that used to be held by coiled steel springs. The gas springs on a car usually last for more than a decade, and it isn’t uncommon to find them still working in cars that are 20 years old. Throughout all that time, they’ve been kept fully compressed 99.9999 percent of the time, yet they can still do the job for which they were designed. This is why we say that an airgun with a gas spring can be left cocked for a long time without loss of power.
The advantages of a gas spring in a spring-piston airgun are:
* Can remain compressed a long time without power loss
* Are lighter than powerplants with coiled steel springs
* Vibrate less
* Move faster than coiled steel springs
* Are less sensitive to temperature changes
The disadvantages of a gas spring are:
* Impart a sharp crack to the discharge
* Require nearly full effort even when the piston is all the way forward, making for harder cocking
* Have a sharp recoil that can hurt if the gun is held too tight
Now, it’s time to look at the velocity and power of the Whisper Fusion IGT. The first pellet I tried was the JSB Exact RS, a 7.33-grain pellet that’s pretty light for this powerplant. RS pellets averaged 938 f.p.s. after I allowed the rifle a few shots to settle down. The low was 919 f.p.s. and the high was 949 f.p.s., so the spread was 30 f.p.s. I think that will tighten with time and more shots on the powerplant.
At the average velocity, this pellet generates 14.32 foot-pounds at the muzzle. I’d expected more power; but once the gun had settled down, it was fairly consistent at that speed. The RS pellets fit the breech somewhat loosely.
Next, I tried the 8.3-grain RWS Superdome pellet. They averaged 915 f.p.s., with a spread from 909 to 921 f.p.s. The gun is already starting to stabilize.
At the average velocity, this pellet generates 15.43 foot-pounds of energy at the muzzle. Superdomes fit the breech snug but not tight.
H&N Baracuda Match
Then, I tried some H&N Baracuda Match pellets. At 10.65 grains, these were the heaviest pellets I tried. The Whisper Fusion IGT belted them out the spout at an average 824 f.p.s., for a muzzle energy of 16.06 foot-pounds. The spread went from a low of 822 f.p.s. to a high of 828 f.p.s., so the gun was extremely stable with these pellets.
Baracuda Match pellets fit the breech tighter than all other pellets. That tells me the rifle needs something to push against, and deep-seating would not be recommended.
The final pellet I tried was the lead-free Gamo Raptor PBA, a 5.4-grain domed pellet. They averaged 1,232 f.p.s. in the rifle, with a range from 1,217 f.p.s. to 1,245 f.p.s. Even with this lightweight pellet, the rifle is still very stable. The total spread is just 28 f.p.s.
At the average velocity, the Raptor PBA pellets produced 18.2 foot-pounds, so the energy is definitely up. But these pellets fit the breech the worst of all those I tested. Some were so loose that they fell out when the barrel was closed, while others fit extremely tight. Because of this, I doubt they’ll give good accuracy.
The Whisper Fusion IGT cocks differently than any gas spring rifle I have experienced. The initial part of the cocking stroke rises to about 30 lbs. and stays there until the final few inches of the stroke. It increases to 43 lbs. of effort for the last little bit. Most gas springs are consistent throughout their entire cocking stroke, but not the test rifle. It requires two hands for me to cock it more than a handful of times.
The trigger-pull seems light and smooth. Of course, we will find out more about that in the accuracy test, but for now it does seem very nice. This is the new Smooth Action Trigger, and it seems to be lightyears better than Gamo sporting triggers of the recent past. I think it’ll be a winner. Stage 1 is short and takes 4 oz., while stage 2 breaks at 3 lbs., 12 oz.
Opinions so far
The rifle has less velocity than the 1,300 f.p.s. advertised, but in this case that’s a good thing. It has exactly what a hunter wants in terms of power. It seems to want to be stable and should not require a lengthy break-in, which is a good thing. Accuracy testing comes next, and we’ll see what it can do in the package Gamo provided. I’ll shoot it with open sights…first at 10 meters, then scoped at 25 yards.
by Tom Gaylord, a.k.a. B.B. Pelletier
Today, we’ll begin looking at the Gamo Whisper Fusion IGT breakbarrel air rifle. This rifle is offered only in .177 caliber, and I’m testing serial number 04-1C-419038-13. It has a gas spring, which Gamo calls their Inert Gas Technology, or IGT. In many ways, it reminds me of the older Whisper rifle, except the cocking is heavier. But this report will look at all the differences and new things Gamo puts on this rifle.
There’s a lot of synthetic material on the outside of this rifle. The stock is all synthetic, as is the fluted barrel jacket and the baffled silencer on the front of the barrel (they call it a double-integrated sound moderator). My point is that if you don’t like synthetics, this isn’t the airgun for you. If you don’t mind them, though, I see a lot of potential here.
The stock has an adjustable cheekpiece that will come in handy when you mount the 3-9X40 scope that comes with this package. The rifle has a large scope base attached to the spring tube. It rises high above the tube, so there shouldn’t be any scope bell clearance issues. The scope base has two generous holes to accept a vertical scope stop. The scope comes already mounted in a one-piece mount with a scope stop pin already correctly adjusted down far enough to engage the scope stop holes in the scope base. That makes this the first air rifle I’ve tested whose mounted scope came ready to install. I’ve always had to unmount the scope in the past to run the stop pin down far enough to engage the stop pin hole in the past. It’s a small point, but it tells me the factory gave some thought to how the gun was shipped.
The stock is very thick and full. It makes the gun feel larger than it is, but that’s offset by the light weight of 6 lbs. without the scope and 7 lbs., 2 ox. with the scope and mount. The buttstock sounds hollow, which I know puts off a lot of people, but it seems rugged enough to me. The stock material is rough to the touch, but not rubbery.
The fluted barrel jacket is very thick — giving the impression of a bull barrel, but without the weight. The silencer is huge — measuring 1-1/2 inches across, for a substantial gripping point when cocking the gun.
Cocking is easy until the final few inches of the stroke. Gamo has realized that the solution to power is not the strength of the spring but the length of the stroke. This is probably the longest cocking stroke I’ve ever encountered, with the barrel breaking down about 135 degrees. This is one of the easier-cocking gas-spring rifles I’ve tested; and if they meet their power output figure of 1,300 f.p.s. (printed on the outside of the box), then I think Gamo has built a winner — at least as far as power is concerned.
To their credit, Gamo installs open sights on the gun. The rear sight is fully adjustable in both directions with crisp, positive clicks. A scale on the windage slide tells you where you are at all times, but there are no numbers on the elevation wheel. They may think that most people look at the elevation of the sight from the side to see where they are; and while there’s some truth to that, the numbers do help you turn the wheel in the correct direction. Of course, the mechanically minded won’t get confused because clockwise turns the rear sight down and counterclockwise turns it up.
I plan on testing the rifle at 10 meters with the open sights. If it does good enough, I’ll back up and also shoot it at 25 yards. Then I’ll mount the scope and shoot it again with the most accurate pellets. So, you’re going to get an extra part or two from this report.
Is it quiet?
Gamo says on the package that this rifle is 89.5 percent quieter.* When you track down what the asterisk means, you find the phrase “Under the Gamo measurement standards.” Whatever that means! I already fired it a few times to get a sense of how it feels and Edith commented from her office, “Why is that airgun so loud?” The pellets I was shooting were probably going supersonic, so I then tested it with some extra-heavy Beeman Kodiak pellets, and it was most definitely quieter. Edith didn’t even notice it that time until I called her attention to it. So, for everyone except the shooter, this rifle is undoubtedly a quiet one…as long as the pellets are very heavy. The shooter, however, hears all the sound through the bones in his face, and the sound doesn’t change much from pellet to pellet.
The trigger is Gamo’s new Smooth Action Trigger or SAT. It comes set up as a 2-stage trigger, and everything was adjusted to my satisfaction right out of the box. A short first stage stops abruptly at stage 2, then breaks cleanly for the shot. I’ll have more to say about it in Part 2 of this report.
The safety is manual. I applaud Gamo for taking this bold step, because a shooter really should be the one to decide when to apply the safety. If they don’t know how to handle the gun safely, no automatic safety will change that or make the gun one bit safer. The one criticism I have of the safety is that when you put it on, the lever is pulled toward the trigger. If your finger slips, you could discharge the rifle. That’s where safe gun handling comes in, because the muzzle should always be pointed in a direction where it is safe if it should fire.
Gamo promises 1,300 f.p.s. with lead-free PBA pellets. I’ll certainly test them; but if experience holds, they won’t be the most accurate pellets in the gun. I’ll also test it with the types of pellets I believe shooters will really select if they want to hit their targets. If I’m wrong and PBAs turn out to be accurate, I will publicly apologize to Gamo.
I always liked the Whisper; and when a gas spring was added, I thought it was even better. The Whisper Fusion IGT was built from the ground up to be a powerful gas-spring gun, yet lightweight at the same time. It’s the combination many shooters say they want, so let’s see what you get.
by B.B. Pelletier
Kevin is responsible for this special Part 4 report on the Gamo Rocket IGT .177 breakbarrel. He pointed out that I didn’t give the rifle enough of a chance to excel in the accuracy test, and several of you agreed. Even Edith chimed in when she read Kevin’s comment. In light of the leniency I have shown the recently tested Hatsan springers, this is certainly true. I won’t change my normal way of reviewing airguns, but in this instance I can see that it makes good sense to try other pellets in this rifle.
It takes a long time to shoot a 10-shot group, so I resolved to shoot just 5 shots per pellet and see where that left me. If the five were reasonably close, I would complete the group with the other 5 shots.
First up was Kevin’s favorite, and a pellet I’ve found to be accurate in a variety of air rifles — the JSB Exact RS dome, which weighs 7.33 grains. I was prepared to be surprised by the accuracy, but RS domes delivered 5 shots into 1.29 inches at 25 yards. So I stopped shooting them. I remembered that the lighter pellets did worse in this rifle in the last test, so next I tried the heavyweight Beeman Kodiak pellet.
The first Kodiak pellet went way to the right of the aim point, then the next one about an inch to the left of that. After that, the pellets went to the same place until shot 6, when the pellet went back to the right. Some time in the final 4 shots, 2 pellets went to the right and low. How do I interpret this?
Kodiaks gave me this group. Six of the 10 shots are nicely grouped, but 4 others open the group considerably. This 10-shot group measures 1.257 inches between centers. The smaller group of 6 measures 0.635 inches.
This group made me wonder if I was being consistent enough with the Rocket IGT. Did I “season” the bore with enough pellets before shooting the group? I actually didn’t season it at all, but the fact that the last Kodiaks are as wide of the large group as the first one makes me think seasoning isn’t important here.
Was I holding the gun as carefully as I should be? That was a real concern. I hadn’t put a scope level on the gun, but was I completely relaxing and then shifting the crosshairs back to the target like I should?
Bottom line, I wanted to see another group of Kodiaks. That would perhaps tell me what I needed to know.
Ten more Kodiaks went into this group that measures 1.906 inches between centers. Eight of those pellets went into 0.784 inches — a group size that I think represents the true accuracy potential of the Rocket IGT.
The second group is very revealing. I tried just as hard to shoot well as I had with all the groups before, and there were no called fliers, but you can see from this group that some pellets didn’t want to play along. That tells me I’m probably not doing something consistently, and it’s affecting the results.
I tried one final group of 10 Crosman Premier heavies, just to see what another heavy pellet might do. This time, the 10-shot group was better than both groups of Kodiaks; but at 0.984 inches, it wasn’t as good as I’d hoped. The openness of this group makes me think that this is perhaps not the pellet for the Rocket IGT. But I’m not sure of that, either.
I’m going to give the Rocket IGT a fifth test, and this time I’m going to do everything I can to make it shoot well. I’m going to mount a more powerful scope, sort the pellets by weight, mount and use a scope level, and spend the time I need to shoot the finest groups possible.
You may not realize it, but it takes a LOT of time to shoot the absolute best you can. It takes me about 5 minutes per shot when I’m really working the artillery hold. I want to do this for this rifle because, in this test, I see the potential trying to peek through. Normally, the shooting I already did would be enough to make a decision.
If you think what I’m about to do is overkill, consider this. I shoot hundreds of different air rifles every year and never have the chance to get familiar with any of them. An owner who has just one rifle can, over time, become so familiar with that rifle that he can shoot like I am about to, but do it in far less time. But if I do take the time to settle in for each shot and if I do remove all of the accuracy-destroying variables, we will finally see what this rifle can really do.
Don’t think that I’m going to do this for every airgun test from now on. I’m doing it this time because Kevin and the other readers were right. The Rocket IGT needed more of a chance to shine; and when it got that, it showed the glimmer of a rifle that wants to shoot.
by B.B. Pelletier
I shot the Gamo Rocket IGT .177 breakbarrel air rifle to see how potentially accurate it is. This is the day many readers have been waiting for. I was even nipped in the hocks by one reader to get it done faster.
The scope on the test rifle is the 4×32 fixed-power scope that comes in the package. The optics are clear, but at 4x, the image seems small. The crosshairs are also rather coarse. So, you really have to pay attention when aiming. I would say this scope is okay to start with if you don’t want to spend more money. And since the Rocket IGT has no other sights, you’ll need an optical sight of some kind.
Starting the test
I decided to use the same four pellets that were used in the velocity test. The distance was 25 yards and all shooting was done indoors, so weather wasn’t a problem. The first pellet tested was the JSB Exact 10.3-grain dome that delivered velocity in the low 800s. The group started very well. Around shot five, it had opened to twice its size. By the end of the session, it was double that. The 10-shot group measured 1.074 inches between the centers of the two widest shots.
It’s always best to evaluate the trigger when shooting for accuracy because you notice every little nuance while trying to hold the reticle still on the target. I now discovered that stage two of the new Gamo trigger has a long perceptible movement. I won’t call it a creepy trigger, but you certainly do feel it move as the sear gradually disengages.
So, my evaluation of the trigger changes from great to just good. It’s certainly the best trigger Gamo has ever fielded; but at the same time, it’s no Rekord.
Back to the test
I felt that JSB pellets were teasing me, and they really wanted to shoot better, so I would come back to them, but next came RWS Hobby pellets. Three shots went into three inches and they were through. Hobbys are not the right pellet for the Rocket IGT.
Next up was our new friend, the H&N Baracuda Green. I expected them to shock me with their accuracy after all the recent success we have seen. But the first group wasn’t that good. It measures 1.141 inches between centers, and you will see that it is more vertical than horizontal.
Since I’d now shot two vertical groups, I decided to try a differtent hold. Instead of placing my off hand at the rear of the forearm where I could feel the triggerguard, I moved it forward under the cocking slot. Then, I shot another group of H&N Baracuda Greens. This group measures the same 1.141 inches as the first group, but it’s even more vertical than the first.
At this point, I stopped shooting and checked all the stock screws. All were loose, and the two in the forearm had to be tightened quite a lot. When I returned to the bench, the point of impact had changed — and H&N Baracudas no longer grouped very well. Four shots went into 1.50 inches, and I just stopped shooting.
It isn’t supposed to work like that. Tightening the stock screws is supposed to give you the best groups the rifle is capable of; but with the Rocket IGT, that did not happen — at least not with Baracuda Greens. However, something told me to try the JSB pellet again, so that’s what I did.
The next group of JSB Exacts was shot with my off hand against the triggerguard and the stock screws tight. This time, there was a lot less walking of the pellets, and I ended up with a fairly good group of 10. It measures 1.025 inches between centers and is much rounder than any of the earlier groups. This is the best group shot during this test and is probably a good representation of what this rifle is capable of.
Gamo PBA pellets
I couldn’t do this test without giving Gamo’s PBA Platinum pellet that came with the gun a try. So I shot two of them. They cracked like a .22 long rifle in the house and landed seven inches apart. That ended the test!
What do I think about the Gamo Rocket IGT? Well, it has many good things going for it. Light weight. Easy cocking and a good trigger are the main ones. The power is also reasonable.
On the minus side, the accuracy I saw was mediocre at best. But I only tried four pellets in the rifle. Who’s to say there isn’t a good pellet that would make this rifle shine? It only needs one.
by B.B. Pelletier
Let’s look at the power and velocity of the Gamo Rocket IGT .177 breakbarrel air rifle. You learned in Part 1 that the numbers printed on the box and gun were in disagreement with the Gamo USA website and Pyramyd Air’s site, but it turns out that 1,300 fps is the correct velocity according to an email Edith received from Gamo’s vice president of sales. Well, Edith spotted yet a third velocity claim — this time on the end flap of the box. A sticker listed the velocity as 1,000 f.p.s., with no further explanation. We’ll clear all of this up and find out just how fast this rifle really does shoot.
I remarked in Part 1 that the cocking effort of the rifle seemed low for a gas spring, which is what IGT (Inert Gas Technology) means. My guess was the rifle cocked at between 30 and 35 lbs. of effort, which is a good 10 pounds less than other gas springs that generate similar power. My bathroom scale confirmed that the test rifle cocks with just 33 lbs. of force, making it easier than most gas springs. The piston stroke is quite long, which is how they manage to generate all that power from such an easy-cocking powerplant. I applaud Gamo for using the physics of the gas spring in this creative way.
I also remarked that the new Gamo Smooth Action Trigger or SAT, as they call it, is a large leap forward from any Gamo trigger I have ever tested. It’s adjustable via a hard-to-access Phillips screw located behind the trigger blade; and when I attempted to adjust it, I discovered that it was set by the factory to the best position.
Screwing the adjustment screw clockwise reduces the stage-two pull length and counterclockwise does the reverse. The screw was in as far as it would go, but I did unscrew it a full turn and verified that it does increase the second-stage pull length.
The trigger released at 4 lbs., 4 oz. with good consistency. The first stage is very light (just one ounce) and stops positively at stage two. This is the kind of sporting trigger that will please many shooters, and I’m so glad to be testing it.
The last comment on the trigger is that Gamo has made the safety entirely manual. The blade is in an usual (for Gamo) place, but it doesn’t go on when the rifle is cocked. I see that as a positive step toward customer satisfaction. Gamo has somebody who knows how to design airgun triggers.
And now to the principal business of the day. I tested the Rocket IGT with four pellets — two made of lead and two that are lead-free. The first pellet tested was the JSB Exact 10.34-grain dome — a heavy pellet for a .177. With a gas spring, there’s no coiled steel mainspring to worry about, so the question of whether this heavy pellet is suited to a spring-piston powerplant is moot.
The JSB Exact pellet got an average velocity of 822 f.p.s., which was below the estimate of 900 f.p.s. I made in Part 1. The velocity spread went from a low of 816 to a high of 828, so a 12 foot-second spread over 10 shots. That’s very consistent. At the average velocity and using weight of 10.34 grains, this pellet generates 15.52 foot-pounds of muzzle energy.
Next up was the H&N Baracuda Green — the new lead-free pellet that’s surprising us with its accuracy. And that’s why I tested it here — because I intend to try it out in the accuracy test, as well. They averaged 1100 f.p.s. on the nose, and the range went from a low of 1092 to a high of 1105 f.p.s. So the spread was a tight 13 f.p.s. At the average velocity, this 6.48-grain pellet averaged 17.41 foot-pounds. That’s good power for this rifle; and if these are accurate at 25 yards, they’ll be a good hunting pellet for rabbits, squirrels and similar game.
Following the Greens, I tried Gamo’s PBA Platinum pellet, a 4.7-grain lead-free dome that they pack with the rifle. This is the pellet they say will go 1,300 f.p.s. (although Gamo’s website still says 1,250 fps). In the test rifle, this pellet averaged 1,229 f.p.s., but the string was large. It ranged from a low of 1,214 f.p.s. to a high of 1,242 f.p.s. The spread was 28 f.p.s. While that’s not terrible, it’s noticeably greater than all other pellets that were tested. At the average velocity, this pellet generates 15.77 foot-pounds at the muzzle.
The rifle comes pretty close to the 1,250 f.p.s. claim still listed on Gamo’s site (as we write this) — but not the 1,300 fps they claim on the box and rifle.
The last pellet tested was the venerable RWS Hobby. This 7-grain lead pellet is often the fastest of its type. In the Rocket, they averaged 1,004 f.p.s. with a spread from 996 to 1,013 f.p.s. The spread was 17 f.p.s., and this pellet generated 15.67 foot-pounds of energy at the muzzle. Once again, the Gamo rifle met its advertised velocity with lead pellets.
Observations thus far
Gamo met the advertised velocity for lead pellets but was below the advertised velocity for their Platinum PBA pellets. Their Inert Gas Technology gas spring is easy to cock and doesn’t vibrate much when fired. And their new Smooth Action Trigger is performing just as nice on this rifle as the mockup in the Gamo booth did at the 2012 Shot Show.
I think you can sense my approval of this air rifle so far. It’s completely modern and nothing like the guns I usually favor, but it cocks easily, it generates the power it’s supposed to, is lightweight and has a fine sporting trigger. If it turns out to be accurate as well, I think Gamo has a fine new rifle in their lineup.