badly rusted bores?

[Merle]

I have had good luck with cast & rough bores.

I have been reluctant to try cast. I thought it would leave too much of the bullet in the bore, and damage the bullet too much for good accuracy. I also thought that cleaning would be a real problem. If it works for you, maybe I've been too hasty. I'll give it a try - I've got nothing to lose.

PS: I have been told by one person that he shoots a few cast bullets to "fill in the holes" then switches to jacketed. That might work, if there is enough rifling left.