Dan, several things. First off I am glad you are alright. Second, I am totally with JLA. That is why I do not collect 45acp for my reloads. I buy it new. I know that because the Glock does not have a supported chamber that when you fire that same brass in a 1911, or any other semi auto pistol that can happen. I have also heard that can happen by shooting once fired brass from a Glock into a Glock again. That is why I don't own a Glock and is why I went with my Springfield and the of course with my 1911 there after. If a person only shoots factory that is one thing. But for reloads I passed on the Glock. Then third, as much as you shoot I have no doubt that you actually had a group that tight at 40'. I would just like to see them closer next time.
I am glad your good to go.