DarlS,

You wrote:
"Bill - In regards the ML double, would not increasing the charge & therefore the recoil not casue the barrels to shoot apart and thus reduce crossing? Or - is that bassackwards."

It is both. If the rifle is VERY underloaded compared to what it was regulated with it will tend to shoot low and cross. Not enough recoil to get the barrels moving in their arch, as you mention.

But the rifle will cross, and tend to shoot low, if the load is too fast also. Too much speed, causing the bullets to exit the barrels before the rifle has had time to recoil and get the respective barrel moving in it arch.

For example, shooting my 458wm double rifle with 500gr 45/70 power loads results in shooting low and barrels crossing. But going too far up in velocity, with the same 500gr bullet weight also results in crossing, and shooting low too.

JPK