Thanks for all the replies and info. This barrel has me intrigued.
Gumboman, The barrel definitely came from Moody Metalworks. The barrel came to me in a well traveled shipping tube. I peeled the stacked address labels off one by one, and the name on the one on the very bottom was Moody Metalworks, Seymour, MO. The newspaper packing in the bottom of the tube was dated 1996.
I haven't tried to measure the twist. Will try to do that this weekend.
Mr. Moody must have sold his equipment/business or passed it on, when he retired. I wonder if his successor is making barrels?
-Ron