Airgun Technologies AGT vixen Reg creep when set to lower pressures.
- PCP Airguns
- 2 Replies
Recently acquired an AGT vixen Long. Came set to what I assume is Factory regulator pressure. APX 130-135b. Off the rip the gun was shooting 18.13 JSB at 845-851 fps, 15.89 hades at 878-883, Monster Light 20.83s @ 799-805. I wanted a much quieter experience. I first tried setting the hammer spring lower trying to find an acceptable spread. No dice. 15-20fps spreads, shoot to shot variations too high for my liking. Degas, Lower the regulator by an 1/6th turn and refill. 15.89 down to 835 18.13 at 775~ish. no matter where on the hammer, even where i found the sweet spot. Wouldn't just settle to an acceptable range. I'd get some really tight spreads. then let it sit for an hour or two, come back first shot 200fps lower then the next string would put out some really consistent numbers and then start climbing slowly. Acting like an unregulated gun.. Ok.. degas, lower another 1/4 turn. velocity was exactly where i wanted. 18.13@ 740-746 15.89 @ 805-810. let it set, come back. first shot with 18.13 - 568 then - 732-739-745-748-739-731-712-749-739-742, same story. I'm very thorough, I always work up slowly on the hammer spring, find the peak, find the plateau and roll back until I'm in that super tight consistent zone. I figure the reg has just had it, it's done, i fugged it up. So just to be sure I bring this up to 130-135b -852.1-851.6-851.9-852.2-851.8-851.3-850.9-852.4. I let it sit, full all night before i left this morning, take 5 shots . 850.3-851.2-850.7-850.8-851.1 Is it that the reg has been set at this pressure for so long the springs have "memory" and just naturally return to this area? obviously the lower reg settings, the first shot being so significantly much lower is from creep.
Obvious the answer is to buy a new reg unless i want to shoot at this energy output. for some places that's fine. but, home, I need the silent little "tink" of the gun set to shoot 15.89 at 800. and i cannot afford a 200fps lower velocity first shot. I had one of the squirrels trying to chew through the newest repair of the attic exhaust vent in my crosshairs at 12.6y which should impact at exactly 1.9MIL low, nope- floated right over his head. apparently at 12.6 @ 568fps the POI is .9mrad instead of 1.9mrad
Any other reason for the low first shot other than reg creep?
Obvious the answer is to buy a new reg unless i want to shoot at this energy output. for some places that's fine. but, home, I need the silent little "tink" of the gun set to shoot 15.89 at 800. and i cannot afford a 200fps lower velocity first shot. I had one of the squirrels trying to chew through the newest repair of the attic exhaust vent in my crosshairs at 12.6y which should impact at exactly 1.9MIL low, nope- floated right over his head. apparently at 12.6 @ 568fps the POI is .9mrad instead of 1.9mrad
Any other reason for the low first shot other than reg creep?
