I shot two pounds of BlackHorn 209. Is it really that good.. it is a good powder without arguement, in the right rifle, with the right primer, and the right breech plug. Is it better then Pyrodex RS or Triple Se7en ??? No. Both of them are great powders, well tested, and other then a few little quirks they have, get the job done. They don't care about primers, breech plugs, or what rifle..
But if it drives Semisane totally insane.. then yes, Blackhorn is great and he should have bought it when he had the chance..