Howdy Darren, that first link is not the one I cut to paste. Here is the one that should have shown up:
http://en.wikipedia.org/wiki/55_gallon_drum#55-gallon_drum
There is a blurb and a picture in there showing the four to a pallet benefit per Mike DelV. My aplogies for the percussion drum link. At least Beau learned something from it.
Outta here, Mike sends . . .