Took my ML to the range yesterday , fired off a total of 7 shots. No swabbing between shots etc. and was able to keep 3" groups at 100yds with open sights. What I did notice was that a ring , which seemed to be plastic residue from the sabots , developed at the end of the barrel. This made loading the 4-7th shots difficult. This is a different "crud" ring from what the rest of you guys have been talking about where the bullet "seats". Any ideas on how to avoid this ? I was thinking powerbelts, since I'm using a CVA.