I must say, an old savage 340 rebarreled to 7-30 would be pretty cool. In a bolt rifle you would have significant improvement over a lever rifle and it would be light weight and easy to carry.Well that's a start.
I have an old Stevens 325C in 30-30 which is in no way a problem. I also have a 7mm bbl with a seriously shot out chamber, it'll take a .301 slip fit in a fired case . The 1st 1.5" of bbl is pretty r o ugh too. So if I lop off the bulk of the chamber it's a shoe in for the 325 or a 340 having most of 6 " available in diameter to thread . I need another 7mm in a Mauser like a fish needs a bicycle but there might be enough for a 110 to get a 280 Rem or AI .
I was thinking that the Waters might be a better case for cast than the others.