I'd just draw file it off. It's not going to weaken the barrel. Paul's advice on draw filing is excellant. Something I'll add is to fill the file with chalk also. It keeps the teeth from clogging with chips and it helps the file cut more smoothly and evenly. Dust the chalk and chips out regularly and rechalk it. To chalk the file, get some plain ol' white school type chalk and rub the file with it until the teeth are packed with it.
Draw filing is easy if you go with a light touch. I've never bothered with any fancy fixtures and I get great results. If I can do it, anyone can. Good luck and let us know how it turns out!
Draw filing is easy if you go with a light touch. I've never bothered with any fancy fixtures and I get great results. If I can do it, anyone can. Good luck and let us know how it turns out!