To paraphrase the late great barrel maker and benchrest shooter, Gail McMillan, barrel break in is a myth made up by barrel makers to get you to waste some of the barrels life. If a barrel is worth 1000 shots of superb accuracy before declining, it would behoove a barrel maker to have you waste the first 100 shots doing something that is of no benifit to the shooter.


3 shot groups? They are only statistically a little better at determining a rifle' s capability or limitations than 2 shot groups. IF you shot several 3 shot groups or better yet a 10 shot group, you would have a better representation. Even with 5 shot groups you sometimes tend to get tight sub moa 3 shot clusters with 2 ' flyers' which really are not anomolies.