I wanted to set my .25 cal to shoot at 900 fps so I had the regulator set at 145 with the valve at 4. What i noticed is that when I fill the gun or let it sit around the regulator slowly gets up to 150 bar. So my chrony result would start at 910,905,900,900 and etc. When I took out to the range at 100 yards you definitely see a poi change. Every first shot it slightly up to the left then the remaining 4 shots start going to the right but its still a 2" group. I decide to group really fast and the result were all 1 1/2 " and there is no poi change. So i think i need to turn down the regulator to 135 and speed to 880 to have a better es. Does it seem normal to do that?
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Fx Impact regulator creep
- Thread starter militaryflip
- Start date
If you have a regulator that is "creeping" (leaking) turning it down (or up for that matter) will not fix it. You need to stop the creep.
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I find my Impact shoots best and most consistently between 240bar to just under 200bar. Not sure why but the chrony numbers don't lie.
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Only when I get the regulator up to 140-150 bar it creeps up. But if its 135 it holds a steady shot string of 880 fps jsb kings. I found that a sweet spot for my impact shooting very tight groups at 100 yards. at 900 fps it opens up just a bit.
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What grain pellet are you shooting? With the 25 grain JSB's, I have no problem reaching well over 900 fps with the regulator at stock settings. With the 33 grain JSB's, I didn't have an issue hitting 860 fps. Doing some research, I found that 860 is the best velocity for that pellet as far as accuracy is concerned.
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Sorry, it's not possible that you see POI change with such speeds: 910,905,900,900. You make more significant mistake than the one implied by these speed differences.
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