Fashion - one very good shot can influence fashion with his choice of guns and shooting style. Fashion is likely a valid point.
Stan gets an A+ for considering MOI. I think all the parts are mentioned above, but I'll try to add a bit of additional discussion and in a differing format.
What happens to handling when the front hand is shifted forward? The front hand moves farther from the balance point (center of gravity - CG) and, so, carries less of the weight. The rear hand must pick up the weight the front hand is no longer carrying. The hands do have greater leverage to overcome inertia but must make greater movement to achieve any given change in the direction the gun points. Hand/arm movements (unmounted gun) can be made much quicker than can body trunk movement (mounted gun).
A light, low swing effort gun (game gun)can be somewhat tamed by a wide hand spread which tends to slow and stabilize swing movement. A heavy, high swing effort gun (target/fowler) can be compensated for with the wide hand spread causing more of the movement to come from the body trunk which has more muscle.
Thoughts?
DDA
