No flame here Mr. Mac. When my personal history is comparable to yours, I may throw rocks - not until then though.
I have done this on factory barrels and had good results. I usually use JB compound for the first few shots and through cleaning after range sessions. The aggressive use of JB seems to smooth things up pretty quickly. (duh) I do not have a custom barrel on any of my rifles. (yet)
Would you still hold that the procedure is unneeded on factory barrels?
"Hear the voices in my head, swear to God it sounds like
they're snoring." -Harvey Danger, "Flagpole Sitta"