Shoot one shot for 5 shots, cleaning between each shot. Make sure all the copper fouling and powder residue are removed before shooting each shot.
Then 5, 3 shot groups cleaning between each group ensuring completely clean.
Then 5, 5 shot groups cleaning between each group ensuring completely clean.
Depending on how rough the barrel is, it may take a few more groupings. You want it so that you can clean with as few patches as possible by the end of the break in. Right now it take 6 patches to clean my barrel after 20rnds or more. Granted it is a hand lapped barrel and that makes a difference in break in also.
Tank