Looking to do either a 300 Win Mag or a 338 Edge as my next rifle. My 260 is a tack driver and hoping to stretch its legs here in the upcoming weeks, but I want to start looking at a build for longer distances.

Looking to purchase an M111 action from Jim @ NSS (.532 bolt head) and then a 30" Bull Barrel in 300 Win Mag or a 338 blank and have my local smith ream it for 338 Edge.

I've got the following questions:
1) Is the M111 action sufficient to handle either of these cartridges?
2) Planning to go without the AccuTrigger and then drop in a Rifle Basix SAV-2, good idea?
3) Is the M111 action a small shank or large shank?

Any additional thoughts I should be thinking about?