I got to shoot an intersting handgun this weekend. A Taurus "Judge" revolver that shoots both 45 Long Colt and .410 shot shells. The gun I tested had a 3" ported barrel, a 5 shot cylinder, and a bit of muzzle blast with the .45 ammo I was using. It's really accurate though. This is a 12 yard, off hand target. The coin is a US 5-cent piece for comparative purposes.
The gun is for "self defense" but I think it would be a great back packers survival gun. It is legal because it has a rifled barrel. If it was a smooth bore it would be considered a short barreled shotgun and be banned. Anyhow, it is an interesting gun.~Muir