Well, I have to call BS on that. I took a Savage 111 chambered in .270 Winchester and tore it apart just for the action. I put a CBI Chambered in 260 Remington on it (short action cartridge) swapped out the stock, and bottom metal (using the same exact magazine). Mine feeds better from the magazine then it does single loading it.

6.5 Creedmoor may have a feeding issue "maybe".