I believe felt recoil also has to do with the size and weight of the individual behind the rifle. I'm only 5'5" @ 160 lbs, and I can shoot my 375 H&H with no issues, and with the exception of my 300 Wby, all my other Weatherbys are unbraked. Less weight behind rifle, the recoil pushes you with less energy. The heavier the person behind the rifle the more energy and recoil is felt because of more mass behind the rifle. I believe also that rifle fit is one of the most important factors the minimizes felt recoil.
These are the shooting sticks I used to practice in preparation for my last safari, and I took them with me, and they are fantastic set. Once you know how to set them up, they are fast, and you feel like shooting from a bench only standing up.