I've got almost the identical setup, but truth is, I've only ever shot it single feed, never tried to feed from the magazine (308). I'll give it a go tomorrow morning and get back with an update.

FWIW it's an X-caliber 28 inch, 8 twist shooting 105's, model 12 action, BVSS stock, center blind 308 magazine. Bullet loaded +.010 into lands seats about 3/4 down neck.