hi,
aviod hammer guns, you have to manuly cock them and if ur rough shooting and a bird jumps up infront of you, you have to cock the hammers, aim then fire, also single barrels are giving you one less chance, & how will you shoot all them left and rights lol. most guns are ok but there are always bad ones inamongst the decent stuff beretta, browning , baikial or miroku will do you fine, better to get something decent instead of wasting your money.
good luck