Thanks for sharing. I'm glad to hear you made it out with every body part in tact.
I'm grateful that all the calibers I load are the kind where a double charge is immediately apparent (9mm, 223, etc.). That's a scary prospect.
I use 3.8gr of bullseye in my .45 and 4.0gr in my 9mm. A double is for me is very easy to do. This is why we must try to pay attention the best we can.