Researcher, I find your report very interesting. My Ithaca NID (trap configuration) has 32" barrels, is padded out to 15 5/8" LOP, weighs 9# 2 oz, balances 5 1/2" in front of the sihgle trigger, has unmounted swing effort of 2.95, mounted swing effort of 11.73, and half weight radius of 12.24. I suspedt your heavy RBL would be similar bus slightly less swing efforts. I shoot the NID well, despite its significant muscle effort required to lift, hold, and swing. Did you ever shoot the two 12 bore RBL's "head to head?" Or, did you make a determination that you just didn't enjoy the heavier gun?
Any chance you are going to be where I could bet measurements on your guns?
