Originally Posted by
Wayne Dobbs
The barrel straightness guage is .219 OD and it takes a very nasty barrel to stop one. I've seen one (last year) and it had over 20K rounds down the bore and hadn't ever been bore cleaned (!!!) according to the owner. 15-20 strokes of a solvent soaked bronze brush and a patch out job and it passed. I don't know what's happening with the BP guns but I'd guess there are multiple factors of stupid involved. As an armorer trainer for Colt, I see lots of this in microcosm in my travels of organizations just not doing the simplest PM routines that would prevent this kind of mess.