I own and hunt with both those ridiculous [ Thats your opion] Rem Ultra Mags. The 300 has 41.26 of recoil ft lbs
and the 338 has 49.63 max of recoil ft lbs and my 300 Win Mag has 32.40 of recoil ft lbs. I was talking about the high brass 12 ga shell not a goose load.