I’ve shot a box of Hornady Outfitter 180gr Gmx that shoots between 1/2” - 3/4“ and also a box of Federal Fusion 165gr that shoots right at 3/4”. That’s the only ammo I’ve bought for the 300 so far.
My 6.5CM shoots Nosler 120gr and also 140gr BTs under 1/2” all day long. Haven’t even wanted...