They were fireforming 30 carbine. lol!
I bet they had a short range trip.
I see some really scary things at my range too.
Today there was about 30 DEEPLY pierced primers on the ground by a bench. Im positive they were from blown primer pockets, no one at this range needs to feprime at the bench.
You're right Barrelnut, I used to buy once fired Federal brass and I would check to see if the blue sealant was present on the primer, if so, I knew it was once fired..The primer sealant and FC headstamp, makes me think it was a piece of factory ammo. And I would say you're assessment is a good one.
Yup...That's what happens when you stick a .308 in a .30-06. Being that it didn't split, I'd say the rifle and the shooter were most likely unharmed...But in need of a new pair of underwear after pulling the giggle-switch.
It is a very clean expansion. I think I'm more impressed that it didn't split at the neck... That's some elastic brass... LOL
Not sure if it's real visible, but the primer was about half way out of the pocket.
That may or may not have created a whole different outcome.
The same thing happened at the range here except they shot 2 or 3 rounds before one got stuck. They took the gun back and said it was something the matter with it. I'm sure it had nothing to do with shooting 308 in a 30-06.
I agree, the .308 has less taper so it must have had enough tension on the chamber walls to hold the case there long enough for the firing pin to strike the primer..With that much headspace I am amazed that it even fired at all.
Cliff