i have 2 old savage99's in .300 savage , one was made in 1947 and the other in 1951 , the one from '51 in inherited from my grandfather and the one from '47 i bought second hand a few years back at a really good price but , it isn't in that great of shape ( rust on the barrel ) so i was thinking about rebarrelling it to .250 savage , aside from installing sights on the barrel ( i still want open sights ) what other things and items will i encounter
?