Hey guys I just got my new impact M3 last week and I’ve spent the last 4 days at the range playing with the tunes. The best 5 shot group I could get was a 0.58” group at 50 yards in maybe 15-20 km/h wind with the NSA 26.8 grain slugs around 910 FPS, I’ve got the 33.6 grain down to .62” at 50 around 914 FPS and I’ve got the 36.2 grain down to a .8” group at 50 yards around 978 FPS. My gun couldn’t shoot the NSA 29 grains, best group I got at 50 yards was about 2 inches, gave up on those pretty quick.
So all in all I’m quite happy but the problem lies where I can’t repeat the same groups later on when I try to go back to that tune I’ve tried for an hour to shoot the same group with no success. I’m going to have to go back down to the range and try again later but now I’m thinking maybe I’m not giving the gun enough shots to settle in between shooting the groups? I would try one setting, then adjust the micro wheel 1-2 clicks fire 1-2 shots off at the steel then shoot my 5 shot group on paper. Has anyone else had this same issue? Maybe my problem is just not getting enough shots off between adjustments to let everything settle?
my gun is currently set at:
1st reg 170 BAR (Every time i check it it’s up or down 10 bar), 2nd reg 140 BAR, Valve return spring set at 6th line ish (12.38mm out), Hammer wheel set at 15, Micro adjuster set at 4.5. That was getting me 978 FPS with a 21 FPS spread, 7.6 std dev and 0.8” group.
this setup was getting me pretty much all around 1 inch groups at 50 yards with the 36.2 g NSA. If I get more time in the next couple days I’ll try get down and continue trying to get my groups smaller maybe by changing my reg pressures instead of the hammer spring adjustments. Or if I play with the valve return spring settings some more but it seems I need that all the way open to get the power needed.
I just ordered the stx superior heavy liner to try out. I already have the slug power kit, and the carbon barrel sleeve installed, and I’m thinking of upgrading my gauges to huma bc the first reg gauge is up or down 10-20 bar sometimes, not sure if that’s the gauge or just how the valves are meant to work. anyways this is what I’ve run into so far playing with my fx impact m3 .25cal. If anyone has had these same problems and have figured it out any tips or tricks to easier or better tuning would be appreciated.
So all in all I’m quite happy but the problem lies where I can’t repeat the same groups later on when I try to go back to that tune I’ve tried for an hour to shoot the same group with no success. I’m going to have to go back down to the range and try again later but now I’m thinking maybe I’m not giving the gun enough shots to settle in between shooting the groups? I would try one setting, then adjust the micro wheel 1-2 clicks fire 1-2 shots off at the steel then shoot my 5 shot group on paper. Has anyone else had this same issue? Maybe my problem is just not getting enough shots off between adjustments to let everything settle?
my gun is currently set at:
1st reg 170 BAR (Every time i check it it’s up or down 10 bar), 2nd reg 140 BAR, Valve return spring set at 6th line ish (12.38mm out), Hammer wheel set at 15, Micro adjuster set at 4.5. That was getting me 978 FPS with a 21 FPS spread, 7.6 std dev and 0.8” group.
this setup was getting me pretty much all around 1 inch groups at 50 yards with the 36.2 g NSA. If I get more time in the next couple days I’ll try get down and continue trying to get my groups smaller maybe by changing my reg pressures instead of the hammer spring adjustments. Or if I play with the valve return spring settings some more but it seems I need that all the way open to get the power needed.
I just ordered the stx superior heavy liner to try out. I already have the slug power kit, and the carbon barrel sleeve installed, and I’m thinking of upgrading my gauges to huma bc the first reg gauge is up or down 10-20 bar sometimes, not sure if that’s the gauge or just how the valves are meant to work. anyways this is what I’ve run into so far playing with my fx impact m3 .25cal. If anyone has had these same problems and have figured it out any tips or tricks to easier or better tuning would be appreciated.
