Sounds like you did a fine job. I do this to every custom shotgun I build and to every shotgun I clean. No way in hell will steel wool of any grit damage the steel in your barrel so do it every time you clean it. Like Five O said you are only polishing it not boreing it out and this will ensure better extraction. If any extraction issues continue then it may take a bore hone to get rid of that issue. I have read about it on these gun sites but have never had the issue with any of my weapons or any I have built, which convinces me the polishing resloves the issue if done correctly. I build a lot of 870's and rebuild a lot so to not have these issue when others do further affirms the polishing works.
J.D. McGuire, Owner
AI&P Tactical, LLC
To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures.
Remington LE Armorer
Mossberg LE Armorer