Am wondering how others might go about this?
I have a 6.5x53mmR carbine for which I form cases from .303 British. Problem is, my chamber will accept a base dia. of .451". This rules out all brands of brass but W-W and R-P. Since R-P cases invariably collapse during forming that leaves only one option. Unless I can easily reduce base diameter by the required few thousandths...
Any suggestions?