WHAT DOES BLACKHORN 209 POWDER IN STOCK MEAN?

I've a CVA optima in stainless-steel. I also have the black horn 209 breech plug. I load 100 grains by quantity of Blackhorn 209 using a 250 grain Barnes bullet. I have discovered that you truly should really use a good primer. Tend not to make use of the primers produced for black powder as it's not black powder. I utilize the CCI magnum primers o