Originally Posted by Korhil78
Depends on how far you are wanting to shoot at the game you are going after? If I were going after large bear then I would look at a 338 cal or larger. You can already take pretty much any game in North America with your 300 win mag. I would take a serious look at the 338 win mag if you are keeping it at moderate ranges and 338 RUM or lapua mag if you are wanting to go long.
I know those are not on your list so if I had to choose, I would go 300 RUM and go with the largest bullet that I could get.
what he said.....
If you have a 300 win you'll only get 10% more payload on target with a 300 rum and it'll put the same diameter hole in the target to boot. I like the 300 rum and that may be another rifle for you to buy, but it really isn't that
different than the win. Since you already have a 300 win and presumably can shoot it without getting scrambled it's time to step up to a 338 of some sort or a 375h@h. If you want to put a hole in anything in Africa approaching box-car size I'd get a 416 rem, but a 375 should do for most else.