Jim, I've seen that myself. Google photos has some good cut-away views of the 9mm imports, and they have a groove in the bottom, making them much thinner, thus it is by the manufacturer, and what material they use, and how they draw the case. Combine that with the Glocks chamber design, what ever that may be, and one might see a blow out after a few rounds of reloads. Of course, one might see it too, in other pistols just the same.
I don't know how true to scale the CAD drawing was, but at least one US manufacturer, Hornady, shows the case being about the same thickness all the way down, unlike the Israeli ammo in the drawing above, that has a tapered sidewall. I think pretty much all US manufactured ammo has a tapered sidewall.
Copyright (C) 2016 Horandy.
Photos Copyright by Sabine Pearlman
I'm not sure who the daddy of the one below is, as it is on Printrest. However, it shows an awful thin base, if the drawing is correct.
