Isn't Ramshot Magnum a ball powder?

I would of started with a magnum primer.

As for the POI shift, they are very common with a change in primers. It can have more to do with a shift in harmonics then a change in velocity.

I often play with primers to optimize accuracy, not velocity.

You didn't use logic or reason to get into this opinion, I cannot use logic or reason to get you out of it.

You cannot over estimate the unimportance of nearly everything. John Maxwell