impact m3 valve sometimes wont seat during tuning

[Heavyopp]

There is no excuse for the valve not sealing with 2nd reg at 70 bar.

poppet and seat are compromised - needs replacement

if it where me I’d turn that 1st reg down to about 100 bar too

You are close to where my m3 is currently set — Jsb 18.1 grn at a very consistent 880 fps for well over 100 shots per fill — accurate as can be

 

[pikerf]

Im going to work on a redisigned tune tomorrow. Order parts monday. Love working on it anyways. Thanks