Re: 338wm vs 375H&H vs 338rum
Any of them will do just fine if used properly. I would always recommend the 338 rum for long range due to the long sleek bullets available that are ideally sized for that cartridge. For a real 400 yrd gun any of three should do a fine job and within that range the ballistics do not really matter all that much as long as you know them. 338 win= great hard hitter, 375=more frontal area but comparable thump, 338 rum=long range super thumper.