First off, you can do it, but I think you will spend MUCH more then you want, and in the end your not likely to shoot it. Going light costs more money even when you are looking at small calibers. I've never shot the 458 Lott, but was under the impression that it "pushed" more then the 458win mag "hit". I had a 458 win mag in a Ruger number one that I just couldn't get past the recoil, 375 H&H wasn't bad to me, but I think the rifle (CZ550) just fit me better. And that may be just it, how it fits you, that makes it tolerable. I just have my doubts about that weight of rifle for that caliber, there's a reason most all African game animal rifles are 8-10 lbs. Good luck on your choice.