I was at a 2 gun match this past Sunday, ammo was reloads from a professional licensed reloader, have shot thousands of his reloads, all I've been using for last 2-3 years, that AR pistol is PSA 10.5 inch. Don't have lots of rounds though that firearm, maybe 500, shot couple matches plus sighting in scope, first shot on second stage, I'm fine, lot of little wounds on left arm from little pieces flying, one piece still in there but ringing in my left ear certainly annoying, very loud, the concussion was insane, it split the Pmag which really shocked me, I'll try to get a better picture of that.
I'm taking it to my gunsmith buddy today, we will contact PSA and send to them, document everything, lower was Anderson, can't remember parts kit manufacturer, messed it up pretty good also, broke the hammer and not sure what else. haven't gotten in to that yet but I'm good and thx for asking, was just curious if others have had or seen something like this other than a video but hope we can figure out the problem so if me I don't do it again, if ammo figure out what went wrong on his end and if the manufacturer they figure out what went wrong.
And especially now if I was shooting a real old pistol like you have with modern ammo the thought would be there but thankfully 39 special not a crazy high pressure round