Quote:
Originally Posted by Otter
Shot them a couple times. Very fun but impractical for self defense in my opinion. I don’t think they make any hollow point ammo and high velocity and deep penetration. The only reason I would know of buying one for self defense is there’s a round good for piercing bullet proof vests because of it’s speed and pointy, small impact area. Pretty sure it’s restricted to law dogs too. Unless you don’t mind spending the money a LR22 would give you about the same experience for a lot less money. I’d take a 9mm for CCW any day.
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As a purely technical point, hollow point is unnecessary in the 5.7 round. Why? It's been specifically engineered to tumble once it enters tissue. They do this by shifting the center of mass of the bullet rearward so that when the tip slows down radically by entering tissue the back end comes around initiating significant yaw.
For bullets not designed to tumble hollow points are useful....for bullets designed to tumble they don't provide much added benefit. The 5.7 bullet is long....when it tumbles it generates a significant wound cavity.
Note sporting 5.7 ammo out of the fiveSeven won't reach high enough velocity to penetrate a IIIa vest. Out of the PS90 it will but not the fiveSeven. To penetrate soft armor with the fiveSeven you would need to use the LE ammo or in some cases very hot aftermarket ammo.