Back when Buhmiller was developing his .500, some of the wildcatters were experimenting with Machine Gun powders, and I am unclear on what powder
Buhmiller used in his shell.
He also apparently made both chambered .500 barrels, and black powder rifled muzzleloaders. Which powder were barrels chambered for .500 shells intended for? Were chambered barrels thicker than black powder barrels? Would there have been a difference in the steel?
