I did some range testing today.
First, I put about 150 rounds of the reloaded stuff through my Sprinfield Armory 1911. Not a single problem. Actually,it shot quite well.
Then I went to the 625. I only had two rounds that would not fit in the cylinder, they were both nickel plated R-P brass. All the other R-P and Speer .45 ACP brass that I have I shot, so I know it was once fired either out of the 625 or the SA 1911. The Rimz plastic moon clips seem to have something to do with it. They all went in and fired, but need a little push to seat the moon clip flush against the cylinder. When I loaded up on steel full moon clips the rounds went in much easier. Also I took several of my loaded rounds and tried them through all 6 cylinders with out clips. Initially, when I wasn't crimping enough, some rounds didn't make it into the cylinder when I tested them individually. I adjusted the crimp again (more crimp). I did some more measurements and noticed that some of the cases bulge to about .473-.474". Isn't this is still with SAAMI specs?
I might go get a Lee Sizing die, or a factory crimp die. I only want to change one thing at a time. It's easier to only change one variable to root out the problem.
Does anybody else have further information on the tight cylinder chambers on recent 625?