Someone is going to start talking about Evan Marshall and Ed Sanow on this thread so I might as well mention it now.
In the mid eighties there were a lot of different theories on what calibers and types of bullets were effective and a lot of competing theories:
foot pounds of energy, energy dump, knock down power, Relative Incapactitation Index, Hydrostatic shock - I'm probably mising some of the ideas that have been touted...
Evan Marshall and Ed Sanow began publishing articles where they proposed rating ammo on actual performance against human beings. They wrote about their concept of the "One-SHot-Stop". I think I first read about it in 1986 or 1987, I can't remember, but even back then I saw some problems with their criteria, but I was intrigued by the possible results - a grading system whereby all bulllets could be rated for their effectiveness.
There were people who saying things like pin-grabber bullets would stop people better than regular hollowpoints, and the Glaser Safety Slug would be the best, or FMJ would be the best, and there were some ordnance gel results, and there were still gun writers who were saying the only way to put a perp down was to use a bullet that would knock people on their ass. This concept of having a grading system - a single number assigned to a bullet was really appealing and I wanted to believe.
I even bought tons of ammo based on one of Marshal and Sanows article - I bought boxes and boxes of Federal Nyclad.
I knew their were problems with their criteria and it bothered me, but I wanted the comfort that came with believing in a grading system and buying the highest rated bullet.
Besides the problems with their criteria, I started seeing problems with their statistical methodology, and then problems came to light about other problems with their data-gathering methodology.
I eventually concluded that their published OSS "data" was worthless - actually worse than worthless since the findings seemed to be tainted by their own bias. The OSS "study" ended up being nothing more than a couple of guys touting their theory, just like the RII was one guy's theory and using pin-grabbers was one guy's theory.
I put more stock in Fackler's work on ballistics and wounding.
The writings of Greg Ellifritz are just so flawed its mind-boggling.
But anyway...
zombie thread but I can't help posting