But in all fairness to BlackHorn 209 from their stand point... when their powder first came out (I don't know if they still do), they ran quite a lot of warnings that their powder worked in this kind of breech plug, but not so well in that kind of breech plug. In this kind of action but not so well in that kind of action. Also they named primers that might give the BlackHorn 209 user problems.

So when a company like CVA was developing their rifles and breech plugs, they might have wanted to take note of what worked in regards to shooting off BlackHorn 209. After all it seems to have quite a following.

I have a question. The rifles with the "adapted" as in drilled out or even redesigned breech plugs.. did that effect the way they handled other powder like Triple Seven or Pyrodex RS?