Will installing a muzzle break change POI or load development?

Will installing a muzzle break change POI or load development?

Yes. It will probably alter your POI. Anything you put in the barrel will more than likely shift the point of impact.


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I guess POI I can live with. Will it change the accuracy nodes through changing the harmonics of the barrel?

Probably not. Probably not enough, anyway, that you'll be able to shoot the difference. Every time I've installed/removed a brake, the old load shoots as well as it ever did - which is to say ~1/2 moa or so.

If it were a benchrest type rifle, it may make a legitimate difference (where thousandths of an inch count), but for a practical/tactical field rifle, I think not.
 
On a 260 and a 308 that I have installed brakes and removed them (I am always swapping things around) I have not noticed a change in accuracy nor needed to retune the load. You will see a change in point of impact.