On a correctly regulated set of barrels we are talking about much less error than I can hold the gun to or even see when I shoot it. If the barrels had the same POI at 40 yards the math indicates there would be 0.43" (3/8") difference at 20 yards and the same at 60 yards.

This is for a 12 gauge. 0.730" plus 0.060" plus 0.060" equals 0.850 which give centerline to centerline of the barrels at the muzzle. Divide .850 by 2 to get the POIs half to 40 yards and half again past 40 yards.

Best,

Mike


Last edited by AmarilloMike; 07/06/10 10:05 AM.

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