[gyvel]

410/.45 and 29 gauge

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Hey all,

There is something to remember. The .410/.45 is more a coincidence than a design. People have been chambering .410 in .454, etc. before the Taurus Judge. The 28 gauge shotgun, as you mentioned, is bigger than .50 caliber. However, that is solely the nominal diameter of the barrel in a shotgun, and not the actual size of the wad/projectiles coming out of the shell. The diameter of a 28 gauge wad may very well be within the .50 cal limit, and that plastic shell could easily measure .025 inches on the "case wall" for an additional .05 inches in diameter. Chamber diameter is unrestricted, as far as I know.

You bring up a very valid point, but, does BATF define a "destructive device" by the diameter of the projectile or the bore diameter?