I'm getting ready to build an AR10, either in .243 AI or .260 AI
With magazine constraints realized, which cartridge can I use the highest BC bullet vs velocity without using up all my powder space?
Will the 243 107-115's work at mag length with good velocity?
Or will a 139-142 gr. 260 be better?
Or will the ogive length not allow any of them to work?
Thanks,
HB
With magazine constraints realized, which cartridge can I use the highest BC bullet vs velocity without using up all my powder space?
Will the 243 107-115's work at mag length with good velocity?
Or will a 139-142 gr. 260 be better?
Or will the ogive length not allow any of them to work?
Thanks,
HB