I just read an article in a new issue of Sporting Classics. about one of the English proof houses. Those guys "proof" everything that shoots, from machine guns to old shotguns.
When proofing a shotgun they started with a detailed visual inspection. It took a worker four years of study to be qualified to make visual inspections! So, it is harder to do than it looks. The author said that if the gun passes the visual inspection they almost always pass the shooting part of the test. I think the proof master said he had seen one or two let go after 18 years of working there. Success rate was way better than 99%. I'll find the article around here someplace so I can reference it.
|