Tater, if you're shooting a bullet .001'' oversize it should shoot, what kind of accuracy does it have.
you didn't say what powder you're using, if you are using smokeless, you could back off to the starting
amount. PSB is poly shot buffer, made for shotgun loads, but it will seal an undersize bullet in a worn
barrel, sold by Midway. I think you should be able to get it to shoot decent, a pitted barrel will take longer
to clean. you may also want to post on cast boolit/ leverguns forum
Billy