Is this true stuff? A military friend told me this:
"That hard of a hit on the primer is definitely not from an American made rifle. Our pin strikes aren’t quite that hard and are usually centered on the primer, I say Usually but not always.
**I can tell you with certainty that t****he Letter C on the Head stamp isn’t a US mark, and the way the primer was sealed isn’t ours either.
Our propellant’s do not leave a white residue, usually a greenish blue color. White would indicate a foreign made propellent.**
It’s of Soviet Manufacture from of the Simbirsk Cartridge Factory. The Soviets loaded 30.06 ammunition for communist insurgencies world wide. But stopped doing so in about 1975.
**Soviet made propellant’s leave a whitish residue which this casing contains.
Its Soviet in lieu of the number code arrangements. 7 5 7. Factory # 7 1957. That’s my best findings. What it is doing here in the US is anyone’s guess but none of that was imported back then or even now.**