50 grain .355 cal bullet has the sectional density comparable to a single #4 buckshot pellet. I'm not impressed. The velocity and energy doesn't make up for the lack of penetration that is bound to happen with a bullet that light for caliber, meant to fragment (which will only hinder penetration more)
Energy isn't everything. A professional fighter can punch with more than 700ft-lbs of force, in some cases.
Trying to turn a 9x19 into a rifle by using an extremely light for caliber bullet is a pipe dream, and a gimmick, at best. More people would be using similar ammo if it was effective and efficient. As far as I'm concerned, that ammo is using velocity and energy to market it's ammo, and I don't believe their claims for a second. I've seen ballistic tests of that ammo on youtube, and I'm not impressed at all. Permanent cavity and penetration was no where near what you or the manufacture claim...
Opens and fragments about 1'' in. Permanent cavity only reaches about 3'' deep, and isn't large in diameter at all. The core piece didn't even penetrate 12'' and it's a little piece of the bullet that's supposed to penetrate, it acts like a FMJ and the damage isn't all that impressive or deep for that matter.
No thanks. You're free to use it, but you should really know what you're using. I wouldn't trust that projectile with my life. I consider this type of ammo to be suitable for squirrels, not humans.
Also, just to reiterate again. Performance in gel does not EQUAL performance in tissue. The gel tests that we go by are only meant to give an 'even playing field' to test different projectiles in the same medium.
The example I will throw out again is. The FBI standard is 12-14'' of penetration. Front to back most humans rarely have a chest cavity that deep. Yet, even with their ammo that penetrates 12-14'' in gel, it rarely exits perps with COM mass hits. I don't think I ever recall a police shooting video where I notice the LEO's bullets consistently exiting the target. But wait, they penetrated 14'' of ballistic gel, why are they not exiting? Because a human is not ballistics gel. I always viewed ballistics gel as sort of being comparable to gut shooting someone/something, where there's no/minimal bones. Completely different from a shot to the chest.