Here's acouple barrel manufactor on break in
Brux barrels http://www.bruxbarrels.com/gpage.html
Hart barrels http://www.hartbarrels.com/faq.php
Bartlein barrels http://www.bartleinbarrels.com/BreakInCleaning.htm
Kreiger barrels http://www.kriegerbarrels.com/Break_In__Cleaning-c1246-wp2558.htm
Pac-Nor http://www.pac-nor.com/care/
Border barrels http://www.border-barrels.com/articles/shoot-in.htm
Lilja barrels
http://www.riflebarrels.com/articles/barrel_making/barrel_fouling.htm
Douglas barrels http://www.douglasbarrels.net/palma/
Broughton barrels http://www.rifle-barrels.net/index.html
Brux barrels http://www.bruxbarrels.com/gpage.html
Hart barrels http://www.hartbarrels.com/faq.php
Bartlein barrels http://www.bartleinbarrels.com/BreakInCleaning.htm
Kreiger barrels http://www.kriegerbarrels.com/Break_In__Cleaning-c1246-wp2558.htm
Pac-Nor http://www.pac-nor.com/care/
Border barrels http://www.border-barrels.com/articles/shoot-in.htm
Lilja barrels
http://www.riflebarrels.com/articles/barrel_making/barrel_fouling.htm
Douglas barrels http://www.douglasbarrels.net/palma/
Broughton barrels http://www.rifle-barrels.net/index.html