WHAT DOES BLACKHORN 209 POWDER IN STOCK MEAN?

I have a CVA optima in chrome steel. I even have the black horn 209 breech plug. I load a hundred grains by quantity of Blackhorn 209 which has a 250 grain Barnes bullet. I have discovered that you actually should use a superb primer. Tend not to use the primers built for black powder as this is not black powder. I utilize the CCI magnum primers on

I have a CVA optima in stainless steel. I even have the black horn 209 breech plug. I load a hundred grains by volume of Blackhorn 209 having a 250 grain Barnes bullet. I have found that you actually need to use a good primer. Don't utilize the primers designed for black powder as it's not black powder. I use the CCI magnum primers only. In no way