I have been using clean shot powder(pellets actually) and was impressed with the results.Since I can no longer find the pellets,I decided to try some 777 pellets in my sons cva eclipse.I am getting some really nasty hard carbon type fouling in the breech club bolt area.Is this typical?Also, when I run a patch down after shooting one shot the 777 is noticably dirtier than the clean shot.Almost as bad as pyrodex.Typical?

CB