Re: Blackhorn 209 new black powder
Smokepoler, according to Blackhorn's web site they specifically state that muzzleloading primers are not to be used, only 209 shotshell primers. Apparently 209 muzzleloader primers are not as hot so maybe that's why you're experiencing problems.
I recently got my first ML rifle, a CVA Accura, and it liked the first load tried--85gr of BH209 behind a 230gr Hornady XTP in a black Harvester Crush Rib sabot, ignited with a Winchester 209 shotshell primer. After boresighting the gun, it took exactly 2 shots and 2 moves of the rear sight to have it printing 2.5" high dead center at 50 yards. I then shot twice more at 100 yards and one shot was 3" high dead center, the other was about 3 1/2" high and an inch to the right. This was with open sights. Hopefully it'll be wearing a scope within a week or so to see what it can do.