Let’s Get Technical "Maybe"
Been tuning my Vulcan .22 at length and have some questions. I have a reg tester and have set and checked the reg. It is dead on 120 bar. I am shooting 16 gn Air arms pellets at 971 FPS and getting nearly 100 shots with a 6.32 ave. FPS spread. That is 240 bar to falling off the reg at what looks like 115 bar. The only question / problem I have is this. I have the HST screwed out 2 ½ turns from flush. That would not be a problem BUT, the o-ring on the HST is ½ in the gun and ½ out. I have tried adjusting the HST and it shoots 1050 and up real easy. Currently at 971 FPS I get roughly 10 shots per 10 bar. I understood that 930 was where these are supposed to be shooting when using 16 gn. I can’t screw the HST out that far or o-ring will be out of gun and HST turns while shooting due to vibration. I’m thinking my HST spring just happens to be on the strong side. Anyone have a better idea??
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have you been drinking? 😀
FORTUNATELY, my wife worked at a SPRING manufacturing company for 40 years. It’s one mile away from my house. Getting a better spring will not be a problem. Just have to figure out what I need to do. Same spring, same power only 1 coil shorter. Funny thing is I took my spring out and polished and buffed the ends as some of you guys mentioned. I can do this. OH then I need to pull the trigger safety out and press fit the safety pin back in with some lok-tite.
I use a dab of blue Loctite on the threads, helps to keep it from moving but also allows it to be removed easy.
you have got a way too long hammer spring. If you are good at DIY you can cut it and collaps the last coil and polish it until flat. or ask for a shorter spring. which can be compressed better but be careful don’t cut it too short.
That o-ring is there just a friction piece to keep the HST adjuster from drifting.
If your setting remains stable, I don’t think I would be too worried about it being half in.
It doesn’t serve as a seal. Now if, your HST keeps turning on its own…. then I’d
be investigating spring changes.
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YES, .08 BAC 😉