[JLA]

I use it extensively as a proprietary break in process I developed my self for "breaking in" ANY barrel new or used..

Simply clean the barrel thoroughly as the instructions decribe, but instead of shooting 10 then cleaning between abrasive grits, shoot one then clean between each shot for the first 2 grit levels, for a total of 20 shots, then do 5 round groups for the next 2 grits and the final grit level do a 10 shot string and finish with a cleaning. Do this with all barrels that have never been "tubb'd" as i call it. I have taken average run of the mill factory barrels and made them shoot fanfreakintastic using this product and my rather anal retentive method of applying it..