I think 500 Grains has it about right. No more recoil than a 500NE will generate out of a rifle no heavier than 11, maybe 11 1/2lbs.

I think the 450/470 class is plenty adequate, should make for a 10 to 10 1/2lb rifle and recoil is tolerable and not an issue for a quick second shot.

So, if you find a rifle you like, that fits you or can be made to fit you, and its 450 to 500NE, buy it.

Don't over look a really nice 458wm, it has worked to perfection for me, but buy it with room in the price to have it rechambered to 450NE if needed.

Editted to add that, in my veiw, only performance with solids is relevant. Where a double rifle is most beneficial, you don't want softs in your chambers.

My thoughts,

JPK