This is just my view, but I am first interested in point of aim performance....that is, when properly fitted and mounted in a repeatable stance, does the gun hit where I point.

If there is a problem showing when patterning off-hand, then I believe you need to sand bag the gun on a stable platform and pattern it like you were sighting in a rifle....this will provide definite proof if you have a point of impact issue, and in particular a difference in point of impact between the two barrels.

I'm sure there are many more expert at this than I...just wanted to share my thoughts.

Cheers

Cheers

Stephen