Actually, I feel much better that I did it myself... While a failure has happened once or twice, I rarely do more harm than good on a project...you can take it to a gunsmith and let him use his brake hone and caliper and then you can feel better because he is a "Perfessional".
As for project, I currently have none. It is regarding the .410 gun cruffster has just took to the field with... I know a brake hone would be too large but it got me thinkin' in case a come across a longer barrel equipped gun deal. I won't pass on a full choke gun just 'cuz I don't like full choke guns for my needs...Bottom line is, since I follow your posts, I have to think this is going to occur on a Mossberg pumpgun
and if it works ....we'll send you one of OneOunces guns ..../for a 2nd project ....