leaking down the barrel

[dman314]

Well Ive got a classic valved lvl 10 mag and im having problems with it leaking out the barrel. I would think it was the lvl 10 carrier but it was working perfectly last week. Ive checked and replaced all the orings in the power tube and on off assembly so it shouldnt be that but im completely out of ideas. Ive also looked down into the chamber and what it looks like its doing is the bolt is moving forward causing it to leak. If anyone can help please post cause its getting kinda frustrating
Thanks

[athomas]

If you changed the orings in the powertube, did you retune your level 10? You need to retune for each white carrier oring that you install.

Most likely, a leak would be caused by too many shims in the powertube. Remove them first to see if the leak goes away. If the leak persists after you remove the shims, then proceed to change the carrier size to the next smaller one. Make sure you use the same white carrier oring. The carriers adjust the tension of the oring on the bolt stem. You want to use the largest carrier that does not leak.