I wonder then, just how you know that this heavy barreled 28 gauge would give 6" of cross-firing at 40 yards? What if it was more, or less? Could we perhaps make it shoot to a desired point of aim by changing powders or charge weight, bullet weight, etc. It's all just something to think about, because we can be pretty certain that any motivation for buying this Model 21 would be to upgrade or flip a rare variation for a quick profit.
It was what is better known as a wild-ass guess, Keith, not that I thought you were remotely serious. But those barrels are a joke, regardless. Another w.a.g would be .060 +/- wall thickness at the muzzles. Talk about muzzle heavy.
JR
