WHAT DOES BLACKHORN 209 POWDER IN STOCK MEAN?

Blackhorn powder is palms down the cleanest and most effective taking pictures powder that I've at any time utilized! I'm shooting 80grn by quantity with hornady xtp 240s and they are tack motorists at 100yds! I have never had a misfire working with Blackhorn 209 and Winchester W209 primers!or five lbs. bottle. What much more could you request? The