The 7615 is a popular gun in Australia and the couple Aussies I asked about them say they suck. They break if you run them hard and they choke if you run them soft. A damn shame because I really wanted one too.
Yeah, I spent about 45 minutes in that particular rabbit hole today. When I came back to the surface, I had come to the conclusion that as much as I wanted the Tactical Amish Machine gun to be a thing, it's a non-starter. The shell strippers apparently break with alarming regularity.
I was into 10mm Auto before it sold out and went mainstream, but these days I'm here for the revolver and epidemiology information.