do most 375H&H mags have enough "meat" in the barrels to bore them out to the 416 Remington mag? or would it be batter to make the bigger recoil jump from 30 caals and 12ga slugs to the 416? my thinking was, to avoid flinching and other accuracy problems, it might be better to shoot the 375,. get used to it, then think about going to the 416 rem mag. it seems that the cartridges are exactly the same, until the shoulder, that is. thank you, Travis