okbob51,
not an arguement, looking to learn here, what would bullet manifactures have to do to the 257 and 277 bullets to increase the BC?
Make them heavier, add a pointed plastic tip, and a long boattail. I would love a 140gr 257 bullet. Load it in a necked-down 308 case and build light rifles with 8-twist barrels to shoot them in.