I am in the process of putting together a .375 H&H rifle, and obviously I don't want to get the balls beat off of me. My question is what are the best measures to reduce recoil?

If anyone has any experience with any of these products please reply!

Pachmayr F990 recoil pad

Mercury recoil suppressor

Mag-Na-Port mag-na-brake (threads on the end of the barrel)

Mag-Na-Porting (standard slots cut in barrel itself)