Good advice. I try to keep brass separate for each rifle. I did F/L size a batch of M1icon fired cases. For some reason a few did not get the shoulder pushed back. When I used them in a M1903A3 there were two that would not chamber. The shoulder was just far enough forward that they were not going to fit, no matter how hard I pushed on the bolt. Every other case was fine. Bad technique, springy brass, improper set up? Not sure. The two offending cases fit the M1 just fine, no thumb pressure whatsoever. The same rifle will not close on the No-Go Clymer, no way.

Dave