TalonSS Questions

[Trampus99]

I have a TalonSS .22 cal 12 in barrel, shooting 14.3 gr Chp pellets from 845 fps at full fill (3k ) to 700 fps at 1750psi setting 8 power wheel 11.5.
It is a steady decline in fps from 3k to 1750 psi ( all I have tested so far.) but typically consistent to 50 yds to hit shotgun shells. Oh and about a 75 shot string in this range.
Here goes the question;
It seems every few fills at full charge it will shoot one mil dot left and after about shot 30 come back to center and stays there? No matter where it hits it’s a dime size group, it just seems the group moves. Next fill it will shoot dead center?
It has a Hawke 2-7x32 airmax and all is tight. No mods other than the airforce super sear.
Any ideas?

 

[Cousin Vinny]

My gut says some changing environmental factor at play. The Airforce guns are apparently very hold sensitive. You can buy an upgraded trigger guard called a WokGuard15 that will stiffen it up and give you the ability to mount an AR-style grip. Airforce also sells a thicker scope rail you can attach that is said to improve rigidity.

 

[Trampus99]

Could be but not that I have noticed. I will say at power 9 power wheel at 11.5 I did one shot string and it was dead center the entire string but raised after shot 20 and got quickly to 1 1/2 inches high and slowly came back down. That’s when I went down one full turn on power wheel. And got where I am now. Shoots great then every 2-3 fills goes left for half the fill. I thought it was wind at first . I got my HW100 .22 and shot it with it dead on. I have 5 PCPs and never seen this.

 

[Cousin Vinny]

I'm trying to wrap my head around what mechanical happenings could possibly lead to poi shift in such a simply designed system. Hopefully someone with more knowledge chimes in I'm very interested in finding out what is causing this.

 

[madeintheuk]

I’m thinking maybe it’s a cant issue. Nothing mechanical should cause it to move poi left or right other than wind, or exterior factors. Especially if it’s not consistently in that spot. Parallax errors can cause this too if you don’t have the same exact cheek weld every shot.

 

[Trampus99]

Again, poi is consistent whether it be left or dead on . If it is shooting left in a five shot group all five are stacked. That confuses me because the weld has to be the same? I’m thinking maybe it could be temp? The stroke of the valve? Slower or faster I don’t know. This gun is new and it came as a .25 and I immediately switched to a new .22 barrel, cleaned and installed. The only other unregulated gun I have is a FX Thor.177 and it is dead on consistent. Also when it shoots left the group gradually moves right to center?

 

[Trampus99]

 

[Trampus99]

So this is kind of backwards, first group is left and I adjusted right. You can see the group stay constant throughout about 30 shots then move to the right where would have been zero if I had not adjusted to begin with. This group is at 25 yds where it is pretty consistent with 50, the impact point is roughly the same. ( it does not double )