by B.B. Pelletier
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.
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.
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.
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.
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.
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.
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.