joshb,
Yeeahhh, I might should've mentioned the stamp a little earlier. LOL Good call on a coke can. That saves $30 right there!
So I have an update...I been telling dad everything that I've been finding out and such and he surprised me this evening and brought me a box of .308!! So we tried it out. Fits the magazine well. Pulling the bolt back allows the round to come upward. Pushing the bolt in chambers the round. It appears to be a really good fit. The extractor grabs it and flings it out with no problem. I tried it several times. However......took the round out of the gun the last time and dad said, wait, let me see that. He looks at it and says, holy...cow (not exactly). And for good reason! Look at the primer!!




View attachment 1086244
If this thing had gone off, no one would [likely] have been injured because it was just the two of us in the house and the weapon was always pointed in a safe direction, but there's no telling how many walls it would've gone through and how deaf we would be from having it gone off in a small guest bedroom. Holy freaking crap!
So.....308 fits like a glove....but chambering it dimples the primer. Now what dilemma am I up against?

Unsure of .308 being the correct ammo just yet, my dad bought the cheapest thing he could find in case it's not the right stuff. It's TulAmmo .308 WIN 150gr FMJ, Berdan primed, steel case, non-corrosive.
Thanks, guys