Bill I have these shims you are welcome to if they may help. Im not sure if they are gauge specific or not?
It says 1-12 DRP 5 5 CHNG SHIM / STEP RIB
It says 1-12 DRP 5 5 CHNG SHIM / STEP RIB
It's called cast off.I wondered what the side angle ones did for you. I guess the way you shoulder the gun may be offset somewhat.