338WinMag with 250's,
375HH with 300's....
The 375HH has noticably more apparent thump on both ends....
With that said it is a truly delightful cartridge.... the "African equivalent of the American 30-06."
BTW, get your stock fitted to you on these two --- if the fit is wrong on either one it can punish you, if the fit is right and your technique sound, then they are both a pleasure. You are moving up your level of play at this point.
EKM