Ed's red should be used for one thing only, and that's cleaning bores and choke tubes. That's all it was ever meant for. Leave it off the rest of your shotgun!
I may be wrong, but I believe Ed's Red was the brainchild of a Sporting Clay shooter who realized the problem of plastic wad fouling and the difficulty of removing it with conventional bore solvents. The acetone component in ER breaks it down and gets it out, and the atf component works on the carbon and powder fouling.
Works great for high-volume shooters.
JR
