Let me begin by saying there is a difference in reloads. I shoot black hills quite a bit, and wouldn't worry about that stuff at all. It is loaded on modern equipment w/strict quality control. There's a difference between that and some average joe cranking out rounds on his dillon 550, it's easy to get a double charge if you're not paying attention. I reload all the time, there's other people who reload that I would trust, and there's people that I would never trust. I know a couple idiots who are always pushing pressures and going into the outer limits of safe reloading. They've also blown up more than one gun.
As far as the mini-14 that blew up. It was a new gun with no barrel obstruction. It showed the signs of overpressure, ruptured case, split stock. My father-in-law was the one who pulled the trigger when it went ka-boom, I was just standing next to him. There was no way to tell if it was a double charge because the powder was already burned up.
There has always been one suspicion I've had which would place fault at both the ammo and the gun. I believe the case might not have been sized properly, causing the bullet to not completely chamber and the gun firing out of battery. The reason I suspect an out of battery discharge is because the case head was lodged in the scope tube.
The reason I would blame the gun is because many autoloaders have a disconnect on the firing pin, so they cannot fire unless the breech is locked. I cannot see the case head ending up in the scope without it being out of battery, unless the pressure was great enough to blow the breech out which could be possible.
I also blame myself for trying to save a few bucks on ammo. Ruger was great, they replaced the gun, with a long letter saying "don't shoot remaining ammo". Cabela's wouldn't replace the scope, and I don't blame them it wasn't their fault. The Magazine was also trashed, which at the time was another $40. The ammo company, MIWALL said, it couldn't have been our ammo. So just be careful with what you put through your gun.
Hey Greg,
If you thought you smelled something fishy, sniff this!