I am not really sure of the best way, I can only tell you what works for me. With my magnums I like to scrub the barrel after every shot for the first five shots, then after it is this I will shot two times and scrub for the next six shots, after that I will shoot a three shot group and scrub, and repeat two more times. This finishes my first box of shells, and with my big guns off a bench it will usually finish my first day at the range. This is by no means an elaborate break in as preferred by many target shooters, but my magnums aren' t competition guns and I only ask that they consistently shoot sub-moa groups, not 1/4 moa groups, if I needed that accuracy I' d probably break them in a little longer. The only thing a break in is doing is to try to smooth the bore a little to improve accuracy, and I have found that my technique is a good comprimise between just going and shooting the gun (usually doesn' t give the best accuracy), and a benchrest break-in (may give the best accuracy but it takes FOREVER).

Gordon