Is it a factory or aftermarket barrel?
Do you load your own ammo?
About how many shots might a hand-lapped custom barrel require ?
I'm guessing a few shots wouldn't hurt.
I personally don't recommend using any abrasives on any new barrel.
I like the shoot and clean method recommended by many barrel makers. the downside of using this method on a factory barrel, is that it normally takes a little longer because of the presents of machine marks.
A quality barrel normally takes 7 to 9 shots with cleaning in between each shot. factory barrel can take double that, but the time spent doing a proper brake in is well worth the effort.
Just My Opinion
J E CUSTOM