Came to laud Federal's .410 Handgun load in 2-1/2" 000 buck (out of a shotgun).
Stayed to consider the evidence that the same load penetrates effectively out of a snubby barrel beyond point-blank distances; still not convinced, but don't think it's a gimmick, either.
http://www.theboxotruth.com/docs/bot53.htm
Left glumly pondering blasting critters who are neither game nor predator.
Not judging, to each their own, just not getting it...