I started shooting Pdogs with tac. Shot good and all that stuff. The next year, I could not find any so I checked the burn charts and here is H335. Tried it and got the EXACT same speed with the EXACT same powder charge of tac. ??? Dirty ?? Wife shoots 100 to 150 rounds a day and we clean every night so I guess I never noticed it being dirty. Maybe 5 patches of CR10 and clean as a whistle. Never did any Pdog shooting in the dark so I missed the flash.. Is there better powder ?? Maybe... but 5000 dead prairie dogs haven't complained yet....