I have always done the same break in for every new gun I have gotten. 10 rounds with a barrel cleaning after each one, thirty rounds with a cleaning after every three, then it's a cleaning every ten rounds. Prior to hunting season it gets sighted in, cleaned, three shots, a swab of tbe barrel once, and run patches through till they are clean of any oil. A lot of work, but I have time to kill when I get something new.
Now if I could just clean my truck even half as often as that....