Wiki has it right. Conservation of energy - the recoil is the same in a 2lb gun with the same barrel length and cartridge as a 10lb gun; all things equal. What's not the same is the FELT recoil. But yer right Brent; nits in the ointment and pickin flys ain't helping wife get a comfortable shotgun.
la plus belle des ruses du diable est de vous persuader qu'il n'existe pas!