Agree with above, but there's another angle. The "thick" .410 barrel applies to most any gun. Winchester 42s have tremendous wall thickness, as do Mossbergs and 870s.
Greener's 'Rule of 96' (ideal gun weight = 96 x payload) works kinda well for 1 oz payloads, marginally for the gifted at 3/4 oz, and not at all with the 1/2 oz .410. Scale barrels and frames as a purist, but at some point shotgunning becomes about hitting flying stuff. A 6# M-42, probably the most .410-scaled repeater ever made, is nicely balanced and a delight to shoot.
Metal at breech end keeps weight between the hands, making for a fast-handling gun. Look up "moment of inertia" as it applies to shotguns.
Never handled a 3# .410 double, either.
