guns_and_labs
Well-Known Member
Also make sure your empty brass is not too long.
I'd definitely double and triple check that the brass is trimmed before you load it. I had some that I sized but didn't trim because I didn't think I would need to after one shot (Remington factory ammo that I shot then re-used the brass). I set up my dies to do a light crimp but when I was loading these they were just a little too long and the crimping action bulged the neck. It wasn't enough to see but just enough so that it wouldn't chamber easily. Didn't notice until I took it up to the range and had 20 rounds that wouldn't chamber! I believe that was right around my sophomore year by coincidence!
Are you sure that bullet isn't jamming (touching) the lands when you are closing the bolt? Have you measured the chamber with a dummy round to find out what the rifles OAL is? I know you said that it was shorter than spec, but the rifle may have a short throat. Easy variable to check and possibly dismiss.
Good Luck
Are you're loads really hot by any chance? If they're on the upper end your shoulder might need bumping back like the others said...The other thing is if you're using a full length die with the expander ball if you don't lube the inside of the neck it might be pulling the neck and shoulder foward on the way out of the die negating sizing you just did on the shoulder. Take out the expander ball from your sizer and try it that way. I adjust my redding body die so I can feel a slight resistance closing the bolt but not difficult to chamber. Check your loads too, if they're hot they might be expanding a lot more.