The bp makers didn't miss the boat. There's alot of nonsense floating about on how good the powders were. I've shot powder from the 1800's and it wasn't nothing special.
In the 70's we were constantly bombarded with how great Curtis and Harvey was and Goex was bad..... My guns said the folks the put that stuff out didn't quite know siccum from scat. Much like the often same ol regurgitated stuff about Swiss we hear nowdays...
Keep working on your lube, a lube will make or break accuracy and contributes greatly to fouling. Powderburner is spot on with his comments in this thread.