Any one ever had problems with COAL using BTHP? I can't get two cartriges to measure the same in my .308 win using either seirra or hornady bthp. I've got a rcbs 308 die that works well with every other bullet but bthp's. Allways +/- .010 of my desired COAL. Is it the hollow point affecting it? I'm new to loading any bthp and just don't get it.