years ago several companys made bolt action shotguns in 12, 16, and 20 Ga and with adjustable chokes to boot. These guns actually was/are fine guns and easily serve dual purpose very well.

On the used market you could easily find one of these gems for roughly $150 or so. They represent a great value in a used gun and will be worth everything you paid for it when you want to trade it in a few years.....assuming you wish to trade.