Thanks RonF, It wasn't the barrel chamber. I had six unfired factory rounds that chambered just fine. I took the decapper pin out of the lyman die, and took off about 1/16" with a grinder. Then I could size them so the action would close like it should. The trim to length was OK. When the time came to seat a new bullet, the case on most of them buckled rather than accept a new bullet! I've done a lot of reloading, even a wildcat or two, but I never had the kind of trouble that I experienced that day! I shouldn't have sold that barrel, but I was pretty frustrated with the whole thing!