Follow the manufacturers breakin process...
Some guys will tell you that you are only breaking in the throat (machined) area but a couple other things to consider...
For instance- I would use the SAME bullets to break in that you are going to shoot in competition / hunting - Jack materials vary and have impacts to how much it’s going to foul, and clean... don’t use one bullet to break in and a different bullet to shoot.
After that do a ladder test to see where you have flat spots (a group of elevation )
Last edited by Spotshooter; 08/07/19.
