Is the tuning prucedure the same with the new power plenum on the fx impact the same as before, or how are you guys doing it. 
Tunning prucedure with fx Power Plenum
- Thread starter spyde82
- Start date
Pretty much same as before with lower reg pressure. I'm shooting mk2 .25 orig S/T barrel 34gr JSB 910+ fps, reg 125bar,hammer spring still a little play on max valve stop around 3 lines. very accurate 75+ shots 250bar fill. 
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