That’s the science. The religion-and-wizardry portion will come into play mainly because there’s no definitive way to check the precision of a new barrel with and without having crack-in. Cold-hammer-forged barrels aren't Reduce, but hammered all-around a mandrel to generate the rifling. They must be clean. Ditto broached or button https://telc56789.daneblogger.com/35005835/歌德证书-an-overview