Just how much advantage is a boat tail over a flat base on two bullets that are exactly the same except for the boat tail. I'm talking to 1200 yards. On exceptionally long bullets is the longer bearing surface of the flat base have a major effect. I'm talking 170gr 277 cal bullets. I have some 170 grain double jacketed bronze tip flat base bullets coming one of these days for testing. The inner jacket is a lead core "wadcutter" design. the outer jacket is high bc design w/bronze point. Any hintz?