Over the winter my uncle decided to give me a .45 cal muzzleloading caplock pistol that he bought a couple years ago at an auction for $20. The exterior is decent looking and the barrel has an antiqued look. Now the bore on the other hand... it has some problems. When I first ran a patch through it the patch came out VERY rusty. Since it has been this rusty for probably 30 years since it has been shot and uncleaned by the previous owner. (my uncle never shot or cleaned this gun) So I cleaned it up with water and butch's bore shine and found the bore is pitted in a few spots and it appeared to have no rifling. Then I went out and shot it and it wasn't accurate or I can't shoot good or something. Then I cleaned it again and found in part of the barrel traces or rifling. How can I get this rifling back? I have also heard of something with steel wool to remove the pitting. Any help and suggestions would be helpful.