Could have been a double charge, but the big danger with progressive presses is dropping a LIGHT charge. Light charges can result in detonation of the powder, instead of a controlled burn. It is easy to tell the difference. A catastrophic failure of a weapon caused by an overload will cause the metal to swell and rupture. Other than being all bent out of shape with a lot of extra ventilation, the gun will usually retain most of it's original weight. Even if pieces fly from the gun, the metal will be all bent and contorted next to the missing portion. With a detonation, the metal will be fractured like glass, with little apparent bending, and a lot of metal will have become part of the surrounding landscape. I once had such a detonation in an Interarms Virginian Dragoon. No one was hurt, as most of the junk went downrange. But, I have since sold my progressive presses and use single station styles, and I use a bulkier powder than Bullseye for midrange handgun loads. One of those experiences will last me for life !
