Almost 100 fpe

[Tofazfou]

Well,
After polishing and making all airways "smoother", I have finally found the culprit. It was the bolt seal to the barrel. Crazy how just a small leak is so critical with delivering the expected power.

I can clearly say I am now in the big bore club with a 131 fpe .357 marauder born from a 22 synrod.

Awesome!  Yes, a little air past the bolt probe oring makes a big difference.  The same thing happened to me with a project gun and when the oring was replaced, the very same projectile and fill pressure went 100 fps faster.  There was a nice POOF, but i didn't think it would affect FPS by that much

SEAL THEM AIRGUNS COMPLETELY.....lol!

[sshewins]

Sweeeeet