While cleaning my Optima i was finally able to get a good pic of the crud ring that Pyrodex, Black powder, Triple 7 and the American Pioneer powders produce when using a primer thats to hot. This isnt bad, normally 1 to 2" of barrel is nothing but a hard crust that makes the shooter swab between shots in order to get the next load down. After 13 shots total, 8 with american pioneer and 5 with pyrodex pellets, i ran one patch down the bore with muzzle foam and snapped this pic. This is the infamous crud ring causes by hot powders and they get REALLY nasty with hot primers and sugar based powders like T7 and American pioneer.