Re: Copper, and more copper!!!!
As for your cleaning Bob, I got to agree with Bindernut.
One thing I do is to use a brass brush with some Solvent (Hoppes 9) and run it through from breech to muzzel and make SEVERAL passes.
Then I take a patch over the brass brush and soak it with the same and make a few passes and let the excess set a while in the barrel to sort of, have time to soak a bit.
Then I'll take a clean patch with a jag and run with patch after patch til it comes out CLEAN.
As far as your groups, I dont see not a thing wrong with those!
Two Words; "Simple Man", song by Charlie Daniels sums up my thoughts on a "few things"!