I have a new JP-15 with the 16" lightweight supermatch barrel.
The manual that came with the rifle says to fire 20, then use JB bore compound. Then repeat two more times (fire 20 then use JB, fire 20 then use JB). Repeat again after 300 rds.
This is supposed to maximize accuracy potential.
On my Noveske barrels, the instructions say no such break in is necessary.
So, for you guys with JP barrels - do you follow the procedure in the JP manual, or just shoot the darn thing?
Mick