Recoil from a sporter weight rifle chambered in 300WM &/or 338WM is tame compared to an 8mm Rem Mag of which neither of the aforementioned will not/can not compete w/ proper projectiles in the 8mm RemMag.
150gr @ 3550fps out of an 8Mag constitutes a medium bore plinker/varmint rig !!!!!!
The projectiles of the past have been it's demise.
I wouldn't sell any of my 1/2 dozen 8Mag's, but I have parted ways with a couple 300WM/338WM's.
