Dig - you are on track. However, the weight, balance, and handling becomes more focused when you add MOI to what you know about the gun. Keep in mind that many of us here in USA reload 7/8 oz (24 grams) of shot at 1050 - 1200 fps (5000 to 7500 psi is typical) for older and lighter weight guns.
I am in complete agreement that a shooter should develop an envelope of gun handling "dimensions" (weight, balance, swing effort unmounted, and swing effort mounted) that are suited to him as an individual.
