577-450 Hunting?

[nomienos]

I have a serious problem with buying strange guns, especially those multi-caliber options. For the last 2 years, I've taken each of my drillings out for some hunting, and am always on the lookout for more. I got offered to buy a just plain weird cape gun that's 12 gauge by 577-450, which I know nothing about beyond that I want it! if I did buy it, I would want to take it out hunting, but have never seen 577-450 hunting before. I found an older thread here talking about its use in Africa, but wanted to see if anyone has experience with it and big game here in North America. It seems to have comparable balistics to a 45-70, would you just use it the same? Where I live in BC is a paradise for game, and have taken deer and even a moose with a 45-70 adapter in the cooey single shot. would the 577-450 act the same? Would love to hear some anecdotes about this round if any of yall have them!