Not a 30-30 but a 32 Winchester special bought in the early 1930 by an uncle. I don't think that thing had a lick of bluing left on it when I first saw it in the mid 1970's. Uncles eyes had gotten so bad he mounted a pistol scope on a home made ring set up out on the barrel where the dove tail usually sits.
Believe it or not that scope was pretty clear and stable plus no problem with the top eject.
Al