Well, Capper, I talked to Doug Scott. He doesn't recall Lynn Weimar. He does remember getting some barrels from Montana Rifle Company in Kalispel. He usually didn't sign barrels unless it was part of a gun. He also recalls that the barrels from Montana Rifle Company were among the most affordable (actually he said cheap) but often very good performance could result from a finished rifle.
I need more information about your barrel such as length, dimensions across the flats and did it have sights and underlugs as if it were installed in a stock.
The best Doug can remember of a approximately 52 caliber false muzzled barrel was one he built up for a customer in California as an English Rifle with a false muzzle for light bench shooting. He doesn't recall the suggested loading.