Crud Ring...
OK, I'll take a shot at this... (pun intended!) :wink:
If it was me, I'd spend the $$ & efforts using a wet patch (use both sides) and then a dry patch between every shot at the range or in the woods.
From what I've read on this forum, a primer change may help reduce the dreaded "777 Crud Ring". But knocking it down on each shot by patching it out is the best bet -- other than switching to BH209, which I've yet to do.
Other thoughts/opinions?
Tight groups!
Old No7