FN FIVE-SEVEN SS196 AMMUNITION Ballistics

[eydaimon]

he Five-seveN's ammunition is designed to hit, travel a few inches, then tumble end over end without deforming. This means that the wound it creates would be as tall as the length of the projectile (more than 21 mm), supposedly creating a more grievous wound channel, but without the expansion of a hollow point or the fragmentation of a frangible bullet

Does the SS196 lead-core alter the tendency of this ammo to topple over?

[BSlacker]

These folks have studied these types of things to death.

http://fivesevenforum.net/forum_index.php

Some of the stuff is BS.

[eydaimon]

These folks have studied these types of things to death.

http://fivesevenforum.net/forum_index.php

Some of the stuff is BS.

So what's to be believed?

My impression is that at the moment, the whole concept of hydrostatic shock is no more than a theory as well, which means that the 5-7 is no more than a possibly unstable .22.

I was hoping to consider the FN Five SeveN a good self-defense gun, but I'm concerned about it's stopping power.

[BSlacker]

The problem with rating stopping power is that it varies. If a person is hit in a critical area like the brain stem even a low velocity .22LR will kill you quick. That would be a good example of good stopping power, but the Meth Head person who is hit in the leg with the .22LR and on Meth and continues on with their attack then you may began to suspect that stopping power is less than ideal with that round.
Any bullet travel after contact is unpredictable IMHO. It may tumble it may go straight through. Sure the designer desires a certain effect but all bets are off when the bullet hits stuff. This is why the bullet shelves are full of hunting bullets.
It should be obvious that a 230gr +P .45ACP at 1100fps hits harder makes a bigger hole than even a .223 at 1800fps but I don't want to get shot by either one anywhere on my body.
On the site I directed you to IIRC a member has shot someone with a FN5.7. Check it out.
The info from all internet reloading forums on the mechanical aspect of reloading the 5.7X28mm for the 5.7 pistol is suspect. This is a unique delayed blow back system. Peoples ideas of head space and case shoulder position/movement is sometimes way off. Their ideas on trimming or not are dangerous. This round has some mech reloading challenges and case life is short it was not intended to be reloaded. If you look at it like a regular rifle round and don't understand the operating system well or at all then you will have or think you have problems when you don't. For the pistol anyway unless you can tell me what the levers L1 and L2 do and where they are located then don't reload for the 5.7X28mm. Answers can be found at the patent office.
Slacker

[eydaimon]

great info! Appriciated

[eydaimon]

http://www.thefiringline.com/forums/showpost.php?p=2205233&postcount=28

Post 28 had some very interesting information for me.

[MrSlippyFist]

I've been reloading 5.7x28 for a year now, some cases (about 200) are on their 5th go-round. Using projectiles from 32 to 55 gr. I've yet to hit any good sized animals yet, but plan on doing some pig hunting soon. I can get a 6-8 inch group at 50 yards, so I'm confident I can inspect the results on a piggie. That fivsevenforum has some pics of a guy that shot a piggie. Everyone has their own opinion on ballistics, so I won't debate that, lets just say I'm very happy with my FsN and can't wait for my AR57.

[tankerman]

Using projectiles from 32 to 55 gr. I've yet to hit any good sized animals yet, but plan on doing some pig hunting soon.

Sounds like you plan to torture a hog, just so you can test your gun. First, 55 grain bullets for hog hunting should be a crime. Second, the best group you shoot is 6"-8", sorry buddy but you are not a good enough shot, these are animals not targets, they move and can charge.