Per Macs discussion and logical bullet theory it implies to me that the spacing between the impact points would start out as the barrel spacing at the barrel and diverge as a widening circle around the POI of each barrel at increasing distance.

Each barrel would have an enlarging circle of probability of impact the farther distance from the barrel.At 100 yards with each barrel with a variance of "0ne MOA" the shots could be in one hole if the left barrel shots a bullet 1/2 an inch to the right and the right barrel shoots a bullet 1/2 inch to the left with a one inch spacing between the barrels centerline.And this with "perfect regulation".At 200 yards the enlarging cone of the bullets impacts from the barrels could even cross if the left barrel shoots one inch to the right and the right barrel shoots one inch to the left(one inch barrel spacing) and the rifle could be perfectly regulated!!

If my concept of double gun shooting is iherently wrong will someboby please speak up!!