I've tried various barrel break in methods through the years but don't bother with them anymore. Some folks feel it increases accuracy and decreases fouling, but there are also some true experts that feel you are just wearing out your barrel. I once read a comment by Gail McMillan, of McMillan barrels, that break in procedures were just an attempt to compensate for poor barrel manufacturing. He felt that it just led to early wear on your barrel.

When I find a good barrel I try to do everything possible to decrease wear, not increase it.