I started reloading 300 WSM. I have about 270 of the nickle brass that I have cleaned and deprimed, resized and primed. After loading a couple to test I noticed they would not let the bolt close.

After careful inspection, I find that the bottom of the brass, closest to the primer is a little larger and obviously did not get resized which is allowing the bullet to go into the gun, but not allowing the bolt to close properly. I readjusted the die and started resizing last night and it is so much harder than normal. Got a couple stuck, but a little added pressure freed them up. The one that is in there now refuses to come out. If anyone is curious, yes I lubed the entire case. I did take the deprimer out to save my current new primers that are already in the case.

Any ideas on this brass and what might be the problem? I am guessing that the bottom expanded when shot although I can not prove it. The initial resize/deprime was NOT hard at all and covered about 80% of the brass. It is that last 15-20% that is giving me trouble.

Any help is appreciated.