Originally Posted by Dirtfarmer

I read the article. They were testing the .308, .260 and 6.5 CM. Then they were comparing .308 with CM, sorta quit discussing the .260. They never said why the CM was preferred over the .260..
DF




The same reason civilians choose a Creedmoor over the 260- better case design allowing better bullets to fit in magazines. When compared in magazine fed rifles, the 6.5c can use better bullets.