I've seen pictures of the old timers shooting their big boomers over a standing rest. Standing allows more movement of the upper torso than seated and leaning forward over a bench.
Greater movement allows the motion of the gun to be arrested over a greater distance, thus less perceived recoil.
Or put another way, the velocity of the gun in recoil is diminished at a slower rate.
Like the old saying, the fall wasn't so bad, just the landing. It's that sudden deceleration that does the damage.
DF
