[RunningJoke]

Shotgun is the way to go:

"The 12 gauge shotgun is the most devastating and lethal weapon yet devised for inflicting rack and ruin at close range. A safe bet for ammunition selection is to use the 2-3/4-inch 00 buckshot load. The impact of one of these shot shells is essentially equivalent to getting hit with a nine round burst from a submachine gun.

It is probably a good idea to avoid the 2-3/4- and 3-inch "Magnum" loads. Their brutal kick makes them a bad choice, and little is gained over the stopping power of standard rounds. Controllability is important, and standard 12 gauge shotgun shells have plenty of kick already."

[jwalburg]

How far away can you be with a shotgun and still hit your target?