Winchester Ball and Hodgdon Spherical powders are manufactured by St Marks Powder Co. in St Marks, Florida. The plant was built by Olin-Winchester, divested and operated independently for a while, and then acquired by General Dynamics.
Hodgdon has taken over distribution of Winchester brand powders and will keep packing their own flavors from the same plant. Hodgdon also bought up IMR Powders of New York, the US distributor for IMR products made in Canada. They do not own either factory. Hodgdon does not manufacture anything except Pyrodex and Triple 7 fake black powders. They get their flake and extruded powders from ADI in Australia.
Olin-Matheson owns the Winchester brand name and produces Winchester ammunition in Illinois and now Mississippi. They licensed the brand name to USRA for rifles that were made in Conneticut until the foreign owner FN Herstal shut them down for lack of profit, and to FN directly for guns imported from Japan and Europe.
Shooter_john, the guy at the gun show was mistaken or lying. Who was it, Alabama Ammo or the other outfit selling components at that show? $125 was not too bad for 8 lbs of powder, though, not if the alternative was mailorder and hazmat ripoff plus shipping.