I bought 150 new winchester STW brass and the belt on 50 of them is too big [long] to chamber. About half of them  were really tight and the other half I couldn't close the bolt. The belts on the whole batch were .004 -.007 longer than the other 100 pieces. Anyone ever had this happen? I'm pissed because I already sized, trimmed, chamfered, flash hole deburred, uniformed primer pockets, neck turned and primed the whole batch. I loaded a dozen for a new load and discovered the problem at the range. All this in preparation for a trip to Idaho for Shawn Carlock's course in a couple of weeks. Anything I can do with them?