Since the howdah gun most of us might have seen and/or used is one of Pedersoli's, I'll ask for information about it.
Compared with standard barrel length (25-30 inch barrels) cap lock 20 gauge shotguns, what is a good rule of thumb for the amount or percentage of muzzle velocity for larger pellets and buckshot Pedersoli's 20 gauge howdah gun loses by way of its short barrels? I am anticipating propellant charges remain reasonably constant between shotgun and howdah gun.
Compared with standard barrel length (25-30 inch barrels) cap lock 20 gauge shotguns, what is a good rule of thumb for the amount or percentage of muzzle velocity for larger pellets and buckshot Pedersoli's 20 gauge howdah gun loses by way of its short barrels? I am anticipating propellant charges remain reasonably constant between shotgun and howdah gun.