Welcome aboard Bldr Bob!
Wally is right on, the bore polishing will reduce the copper fouling build up when doing the break in and consequently you will achieve best accuracy sooner than it you did the tradional shoot x number of rounds, then clean and repeat. Although I have always used the polish method, some here have had to shoot as many as 150-200 round through the barrel before they got their best accuracy. You can use either a bore mop or a patch on a tight fitting jag to do the polishing with JB non-embedding bore compound, Fltiz, Maas or Simichrome metal polish, all will work fine, I've used all of them, just use what you can find easily. Also, while you're at it, you might want to polish the chamber, it will eliminate failure to eject as long as you make sure the chamber is clean and dry before you shoot. I use a bore mop wrapped with a patch, stuck on the tip section of a multi piece cleaning rod, chucked in a drill, takes about 2-3 minutes and you're done. Change the patch 2-3 times and add more polish.
Have at it and good shooting!
Tim