[Gaffer]

I did some research and came to the conclusion that buckshot was the best SHTF shotgun round to have...

At one time for a brief period, ATG sold 12 gauge rounds loaded with fleschettes.....if you'd have acted quickly, you'd have something that would work very well, indeed....

[BigDaddyTX]

http://www.firequest.com/exotic-shotgun-ammo.html

[Ruy Dias de Bivar]

***ATG sold 12 gauge rounds loaded with fleschettes****

If you reload, you can fill the shotgun shell with short nails with the heads flattened to make fins.