Love the Strasbourg Tests of hate them (google it and you will find proponents and opponents), at least they looked at incapacitation time from a lung shot (i.e. a chest shot) rather than kinetic energy transfer for the theoretical "stopping power." It's not about putting a BG on his keister; it's about eliminating his ability to harm you or others.
I am personally not a fan of 12" penetration because the average BG is not 12" thick! I don't want an exit wound because in AZ any collateral injury is the responsibility of the shooter, even if the shot is legit. Yes, I know that ballistics do not travel in a straight line through flesh; still I am concerned with too much penetration just as with too little. While a heavier and slower round will tend to spread better than a lighter faster round it still takes a long time relatively to spread. My first thought is to find a round that incapacitates a BG as fast as possible. Energy alone won't do it; the fact that counts IMAO is time from shot penetration to incapacitation.
So I want a round that is going to create a gaping wound in about 4-8" of tissue...just enough to rip a lung apart or with great shot placement ruin the heart. If the shot is a gut shot I want damage to multiple organs not simply penetration. I know that sounds gruesome but it is what I am looking for if I have to pull the trigger. Yes, I realize that I might need to put a shot through an arm or something of the like, realizing a need for a little more penetration. That is why I would not put a single shot downrange in SD; multiple shots give the best chance for a center of body mass shot.
So that is why I like the Magsafe rounds. They incapacitate really fast comparatively, which is what I want in a round.
Nothing against other rounds
AT ALL, and I CERTAINLY understand why LEO use JHP's instead. I wouldn't want my tax dollars going to a couple hundred of those for every cop in the force in my state every year.
That'd be some serious bucks! LEO studies have to consider cost effectiveness as well as incapacitation; they won't even consider rounds that are too expensive because they are not an option for LE budgets, which is perfectly understandable. For my SD round, though, I am willing to spend the money.
No, I am not hawking their stuff either.
I have also heard that the Cor-Bon rounds are really good, but I have no experience with them.
I am going to check out the other rounds posted here too and see what I find. Never hurts to keep looking for a better round, right?!?