Has the pistol been tried with anything other than that original box of Hornady ammo? Looking at the photo of the blown cases, the cannelures on the cases look pretty ironed out. My 10mm Glock has about that much unsupported case head and I don't even get smilies with some pretty high pressure loads. (That said, I load new brass, reload it once then toss it.) I have to wonder if Springfield isn't correct about the ammo being over pressure.
