Here's one of my sources that says they called ramshot (who owns the winchester brand now) and according to the burn rates, the wap and silhouette are exactly the same.
Nope, Hodgdon distributes
all winchester AND IMR
powders. Ramshot is distributed by Western powder company.
Confused yet? There was a time when all the companies were a separate entity. Hodgdon has ALWAYS been simply a distributor. Dupont owned the IMR powders, Winchester owned the Olin powder company that made both Winchester powder and sold the same stuff to Hodgdon that re-named it, hence, 296-H-110 being made at the same Olin plant. Along with HS-6 is WW-540, HS-7 is WW-571 H-714--is WW760