[mustang2dakota]

ok so iv been having some problems with my lvl 10 bolt in my 68 classic it wont go above 220fps no matter what,iv checked ball to barrel bore,tank output and have tried every carrier/shim and my velocity is all the way in can someone help

[DMex]

Might have a bad spring pack. Do you have another mag to test this? If so just start swapping parts from the known good reg till you find the culprit.

[mustang2dakota]

im thinking it may be the on/off

[LoveMyMagMoreThanYou]

How old is your classic valve? You may need to buy the high pressure piston if your valve is old enough.

[mustang2dakota]

its not that old but ill take a look

[DMex]

If its not leaking out the back hen its not your piston