MOI = moment of inertia = swing effort = muscle effort required to point the gun in a different direction. MOI is to swinging the gun as weight is to lifting the gun. I do gun handling profiles of weight (lift, hold, carry), teeter-totter balance (weight proportioning into each hand), unmounted swing effort (changing the direction the gun points before mounting to shoulder), mounted swing effort (changing the direction the gun points after mounting to shoulder), and half weight radius (gun compactness). These factors quantify the handling of guns and allow direct comparisons among guns; much as stock dimensions allow comparisons of gun stock fit.
Questions?
DDA
