You know I saw a few times where a break can change groups and POI. Makes sense though. If machined off by a hair, might cause some turbulance on the bullet like messing with a crown of a gun. I have been working on a load for my friend's 300Weatherby. I shot it and it was getting 2" groups or worse. I took the break off and that shrank to 1.2" or so consistently and changed POI by 3MOA at 100 yards. After working on this gun, I decided against a break unless I have too. Everybody looks at me like they hate me at the range. Don't blame them. Also didn't like the clean up unless you take it off.