If you're shooting only out to 300 yards, why bother with the magnums? The only exception I would see is a 338 Win Mag for shooting 225 or 250 gr bullets for grizz. Otherwise a 338 Federal with a good bullet like a 185 gr TSX or 210 gr Partition will do in any moose or elk out to 300 yards, with no more recoil than a 270 or 30-06. I love mine (sako 85 338F) 2 thumbs up...now I just need to find a critter to whack with it
my favorite load is the 210 gr Triple Shock @ 2625 fps, with a 215 gr Sierra at similar speeds for cheaper practice. If you dont reload, it's not a big deal as Federal makes six different factory loads for it