I patterned my new 1301 Comp 24" over the weekend to test POA/POI.

I noted that my pattern was centered about 2" to the right and about 8" high at 20'ish yards, I shoot right handed.

It was on the factory cast/drop shims of 60 mm DX (RH) cast. I was going to change to the 65mm Shim but I am trying to figure out if I need to swap the shim to a SX (LH) as well. Will that give me a neutral cast and center me or will I wind up swapping the pattern to be off to the left? I have only found one reference online and it said that there really wasn't a way to get a LH cast on a Beretta auto only a RH cast or Neutral as the SX doesn't really give you cast on it just removes the cast. Which sounds like it is what I would need.

For reference, I am 5'11" and 155 lbs with a narrow/long head/face.

Any Beretta shotgun experts?