ETA caliber 5.56
No NATO cross but it does have crimped primers. It does have what looks like an S on the headstamp. Tumbled in walnut.
I have a 6"X 7" Priority Mail box full of it that according to my digital bathroom scale weighs 10 pounds. According to the handy-dandy reference in the reloading section here, that's approx 750 cases.
I'd like $45 shipped. USPS MO or PP.
IM here only.