Bushwhacker,
Dyna Bore Coat also helps with pitted bores. I applied it to the bore in my old 1892 .25-20, made in 1913, and it made a noticeable difference in accuracy with cast bullets.
One thing I've noticed about .25-20s is the Savage Model 23s tend to have nice bores, probably because the 23 wasn't introduced until non-corrosive primers appeared.
