have you tried chambering a case that has been sized but no powder or bullet seated yet like I suggested a few posts back. That would narrow it down to either seating depth or improper case sizeing
you need to find out which component is giving you the issue, until then you are just chasing your tail.
Anyway unless you have some bodacious neck tension going on there the bullet depth is not going to stop you from closing the bolt. It is a fairly common practice for BR shooters to seat the bullets into the lands depending on the barrel
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Last edited by hounddawg; November 26, 2012 at 08:26 AM.