Oh I bump the shoulders back each time on my 223 and trim. The bolt is difficult on a round or no round. I don't shoot factory rounds matter of a fact none of the rifles I have now have ever had a factory round fired thru them. Good thought thought it would make sense! that was one of the first things I checked ;D

It's like the bolt hits a spot then you rotate it further it free's up then hits another spot, I wonder if I shouldn't check out the lugs? might be some burrs on the reciever. Later,

Kirk