Originally Posted by DMex
It's not your spring pack.
A leak out the velocity hole is a reg piston issue. Could be something as simple as a bad piston oring or having your velocity turned up too high. They are designed to vent.
Bring the velocity down a llittle and it should go away. If it's a constant leak no mater what way you turn the velocity knob then it's def an oring.
As for your roll out issue. You're probably using very small paint or your detents are worn/missing on your barrel.
It was very small paint, thats what I said was the issue.
It was venting, I didn't even think of that. I was using Co2 instead of HPA and didn't adjust before hand. Thanks a lot!
I need a smaller barrel.