I don't know where it has been written anyplace other than by myself, and others who do a lot of regulating of double rifles! I will say, that with every video I've watched of the major companies shooting the targets while doing the physical regulating of their rifles, that is the way the bullets hit the target when they call it REGULATED! I think the reason some do not believe this is the case is of the wrong opinions of many gun writers who do not understand double rifles, and make dumb statements in print.

Here, and on AR as well, I find most try to make their doubles print in one ragged hole,@ 50yds, or 100yds, and think that is a perfect regulating load, when it is actually not! If both barrels are hitting the same hole at any distance, that is the distance where the loads are crossing, and with that load, at any distance passed that point the crossing will get wider! What makes this worse is, well known gun writers believe this is the way it is supposed to be, and they print it as gospel in the gun rags.