What I am talking about is shooting a gun from a rest at 13 yards like a rifle to see if both barrels hit the aim point. I understand that different people will pick up the same gun and shoot it to different locations on a plate because their mounts, physical attributes etc. are not the same. What I am concerned about is that one shooter shooting two guns with the same stock dimensions will hit different points on a plate with each gun because the barrels on one or both guns are not straight.
My question is based on something Neil Winston said in a piece he wrote ("Point-of-Impact and Pattern Testing at 13 yards", 2/11). "I have had a like-new Ithaca-era MX-8 single for seven years and POI- and pattern-tested it many times and it's shot a little to the left all that time. This is typical not just of Perazzis, of course, but shotguns in general."
While he called it POI testing, it was in effect POA because he was using a rest at 13 yards, and using numerous rounds to address potential variations in the shot pattern, weather, etc.
If each gun has a potentially different POA, the stock dimensions provided during a gunfitting session may not work on other guns (for that matter, how do you know the try gun shoots straight)?
