On the way home from the gun show with a buddy, he was telling me about where he had seen a bunch of guys shooting a few months before, open field, lots of trucks park next to the road...we are driving by the sa,e spot, and there they are again. Why didn't you invite us?
I think I bought mine when I bought the barrel (16" carbine).
If you cannot find any on ebay or someplace I will loan you mine for a bit (just north of Syracuse).
Sometimes I will see them on 24 hour campfire - will let you know if I see any around.
You cannot just neck up a 223 case with the regular 7 TCU resizing die and some imperial sizing wax?
I think that is what I do (almost sure of it, since I have reloaded for mine and do not have a forming die).