I don't take ballistic tests seriously, because if you read the ammo warning, can cause death" meaning all guns are capable of killing an attacker.
If you want a one shot stopper, buy a 500 S&W or some other high caliber revolver.
The problem isn't so much is "the truth" as in what people will
believe.
In "the old days" shooting into water cans, waterlogged phone books or Duxseal or clay compounds was the rage. In many cases the results showed nicely mushroomed bullets and the clays held their expanded shape, showing grisly looking cavities. The problem, of course, is that the real world performance was far different. Far less impressive.
Today we use a ballistic gelatin format. Not because it's perfect, but because it's repeatable. Testing bullet "A" can easily be compared to bullet "B" without some snarky comment that the muscle tissue or bone density from the second animal was inferior to that of the first test animal.
Go look through this thread and others. There is always someone who says he doesn't believe/trust/follow the performance of bullets in "Jell-O". Often they'll say that such testing omits bones and varying density organs. But when a small caliber light bullet performs well against a large animal, these same folks post objections that "the bullet
must have passed between the ribs" or "
Just because you were lucky once..." ad nauseum.
Using animal (or even human) subjects adds huge complexity because now we have to control for body fat, bone density, variations in distance between the skin and organs, physical conditioning (muscle tone/density), etc. This makes any such testing prone to errors and non-repeatable.
The only serious advantages of ballistic gelatin are that it gives a fair simulation of human soft tissue, it is useful for repeatable tests, easily available and disposable and relatively easy to use.
Is it perfect? Of course not.
Ballistic Gel cannot tell us how a bullet will affect someone hell bent on killing you. Or whether it will generate sufficient pain to pierce the foggy veil of adrenaline, drugs or intense rage. It cannot tell us that the bullet's passage will cause a big enough change in blood pressure to result in incapacitating the target rapidly. We can only infer these things from examining the performance in the gelatin.
If you want highly effective round with a high likelihood of a one-shot stop, use a rifle with a rifle cartridge or a shotgun. Otherwise, select your gun and cartridge with the idea that
shot placement and
penetration to the vitals are the critical factors, then go with it.