Now the next obvious question and one that is in contention is how to pattern a gun to see if POI matches POA.
Do you mount as if you are going to shoot and then aim the gun using the bead?
Do you ignore the bead and just concentrate on the target?
If done right at 16 yards it will tell you how much to bend the stock but if done wrong it is useless.
When you're shooting to check POI you want to know where the gun shoots by removing the influence your mount and dimensions have. The best way to do this is to take two quarters and rest them on top of each other. Place them at the rear of the rib just in front of the breech. Aim at a spot on the board by placing the bead so it sits atop the two quarters. You've essentially created a rear sight for the gun. Shoot it like you would a rifle. This will tell you were the gun is shooting and let you be confident with applying your measurements.
It's possible that you may shoot a gun well that doesn't fit. I've found out that this tends to happen when the gun doesn't shoot where it's supposed to and it just so happens that the poor fit compensates for it. For example, the gun is too high for you but the POI is low which essentially cancel each other out.
It's much better to determine POI and then worry about measurements. You may be able to correct for POI problems by using different dimensions than what the try gun says you should use.
