A double rifle is properly loaded when the centers of each barrels groups are slightly on it's own side of the aiming point. To find this, one must place two targets on the same back board, side by side. Fire the r right barrel on the right target, and left barrel on the left target in a sequince, Rt, LFT, RT, LFT,RT,LFT, for six shots! Now if they are shootig slightly their own sides of the POA, then you must find the center of each group on it's individual target, and punch a hole through the paper of one of the targets at the center of that group. NOW!, Overlay the right target on top of the left target, and trace the bullet holes onto the other target with a pincle, and through that hole you punched at the center of that group, make a pincle dot through that hole on the target in back!

NOW, you have a target that will give you the composit group, and the exact centers of each barrle's group. Measure the distance between the two centers, and half way between the two groups is where you want to adjust your scope to point on the target, and this will be the center of the composite group as well.

If each barrel is shooting 1 MOA, and with it's center on it's own side of the POA, the with the scope zeroed half way between the centers of each barrel's group, the composite group will be approx, 2" slightly egg shaped on the target.

Most people can't get away from the fact that the barrels are soldered so they converge, thinking that the bullet paths do converge as well. This is not true, the bullet paths do not converge, but the convergance allows the muzzle to be at a place in the recoil when the bullet leaves the barrel so that it hits the target silghtly on it's own side of the POA, and the other barrel edoes the same in reverse! The center of each barrel's individual group never cross no matter the range. As each group widens down range the composit group will get larger,And certainly some of the bullets from both sides will cross over into the other side's group, but the centers will not cross, but remain paralell down range!

The irons on double rifle with multiple flip-ups, for long range were not simply there for looks, if the load is right for the regulation, the rifle will shoot to those sights down range, at the distance marked on the sight involved!