Thanks. That makes sense.
I got the same barrel last fall, followed the break-in as outlined by H on his site. Cleaned a doe's clock with it, so I call it good. ;-) I haven't cleaned it yet with copper solvent. Any "rule of thumb" with regard to number of rounds, or just wait 'til accuracy goes south on me? I use Hoppes #9 on my barrels and every now and then, if I let it sit for an hour or so (which I usually do) I"ll get a little blue on the patch. Is that a sign of copper residue/buildup? Don't get it everytime I clean.