I originally used Pyrodex in my TC Encore. Switched to 777 - the no sulpher substitute. 777 left a crud ring in the barrel; there's special primers to better ignite the 777 and are supposed to help reduce the crud ring but I never used them because I switched to Blackhorn 209. BH 209 is more like a low pressure smokeless than BP. It produces less crud in the barrel and you use standard bore cleaners to clean up. It is volume measured like Pyrodex and 777 but produces better velocity. Go to
http://www.blackhorn209.com
Mike