lvl 10 - leaks even with smallest carrier

[theraidenproject]

I traded my emag for a my friend's xvalved ult mag plus cash. IT worked before, I know, becuase I even shot it myself. However, I oiled it and gassed it up, and it kept leaking down the barrel. I kept switching down carriers from the 2.5 it started with, all the way down to the smallest one. It wouldn't stop leaking, although it would slow down (marginally). Some advice on how to fix it would be great. Thanks.

[RRfireblade]

Pull out all the shims first.

Then start with a new o-ring and retune.

After all that, re-add the shims till it resets properly when pinched.