Not greasing the hinge pin after every time you shoot will wear it out faster than high pressure loads.

Let's look at the real world here with a .375 H&H. If your new (Searcy, Merkel, Chapuis, Krigoff) double was fitted properly and you hand load to slightly less that factory velocity and your gun regulates; you can, with proper care, expect to shoot hundreds of rounds without it coming off face. However, if you shot hot factory ammo, put it away, shot, put it away, etc. You might get 100 rounds before it's off face. There is a lot of "hanger flying" on this forum and good advice. I was properly advised on the feeding and care of my .375 and with well over 500 rounds shot, it's still like new.