I myself don't feel the need to shoot dragons. They are cute and cuddly and make great pets. I used to have a pet dragon named "Bimby." He (or she, we were never sure and you don't just go looking around on a dragon) breathed fire and would warm the our hovel in the winter.

But I do have a rather large revolver I inherited. It's a .56-100 which my grandpa used in Montana. Smokeless powder, of course, and pushes a 850 grain bullet at 2,900 fps. When grandpa fired it whole mountains fell down, as did grandpa. He only fired it once, because the recoil broke both of his arms. He always called it "a REAL MAN'S gun. It was made for him, so it's one of a kind. Ammunition is kinda expensive, too.