I shoot an O3A3 with GC 31141 with reduced loads for paper target shooting, usually 11 grs of Unique. I got interested in paper patching as a way to get rid of the gas check. I have sizing dies for my Lyman 45 in .310 and .311. If I have read things right I'm going to have to buy another die in .301 in able to get the patched bullet into the sizer without tearing the paper off. I think Lyman dies are $26 which will buy most of a box of gas checks, so at 78 I probably won't be around long enough to save much.