Blaser F3 barrels within a type (game, sporting, trap) weigh the same for any length. So, 28" - 32" sporting barrels all weigh the same. Assuming the balance adjustment system in the stock is not changed, I would guess that a 2" change in barrel length would make a very small change in either measured or subjective MOI. A 4" jump would be more evident. If the barrels flare out to take the choke tubes, then the muzzles would be relatively heavy, and the change in feel with length more apparent. If the Blaser has been tested with different barrel lengths in place, I would like to know how it fared.
A PBS program on Stradavarias covered efforts to understand why they are so good and to match their sound. People tried and fell short until a physics professor, if I recall, figured out the critical elements and could make and adjust violins to sound like Stradavarias. Hope for those who need a fine violin to play or practice, but cannot afford a Stradavarias.
