I too use Boretech, as well as Butch's Bore Shine and Gunslick Pro with very good results.
My 3-groove Lilja barrel stays clean and hardly fouls but I use them anyways.
Dan Lilja's take on barrel fouling >>> http://riflebarrels.com/barrel-fouling/
My 3-groove Lilja barrel stays clean and hardly fouls but I use them anyways.
Dan Lilja's take on barrel fouling >>> http://riflebarrels.com/barrel-fouling/