Personally, I think you would be nuts for putting a 577 in a Ruger 1. First of all, a single shot as a DGR is not a good idea unless you're one of those people who can reload in under a second without thinking about it. Second, the Ruger 1's though gorgeous have a reputation for kicking harder, don't know why that is. Third 577 NE are you nuts??? Lol. No disrespect intended. A 470 NE or a 404 Jeffery would be way milder and more practical and will still drop anything that moves.

Recommend you get a double rifle or a good CRF bolt in one of the above calibers ... I started out with a 375 H&H and am going to rebarrel up to a larger caliber (thinking 470 Capstick right now), but not until I go to the big bore shoot in Helena Montana and try some of these big boys first hand.

Best of luck with whatever you choose ...

Chuck