About 20 years ago one Evan Marshall and one Sanow wrote a book. Later Masaad Ayoobgot involved.These are the folks who came up with the rating of hand gun bullets by "percentage of one shot stops"in "actual shootings." For a long time gun writers referred to handgun bullet effectiveness by "percentage of one shot stops."Marshall, Sanow and Ayoob are proponents of smaller caliber fast bullets. Turns out it was all phoney. Fackler and several others put the lie to it all.

http://www.firearmstactical.com/streetstoppers.htm

http://www.firearmstactical.com/marshall-sanow-discrepancies.htm