I don't know if this helps, but my hunting buddy and I both have nearly identical Browning X-Bolts. His is chambered in 338 Win Mag and mine in 300 Win Mag. I see very little difference in recoil. If anything, I think the recoil of my 300 may be just a bit sharper. My CZ550 American (Kevlar stock) in 9.3x62 is a little heavier and is more pleasant to shoot than either of the X-Bolts. I've never shot a 375 H&H or Ruger but I would think the recoil would be manageable.
