Ammo??? 5.7 vs 4.6 vs 17hmr vs 17mach2

[ParChaser]

ok silly question but would like to know....

How does the velocity, knockdown power and penetrarion (body armor piercing) compare on these 4 calibers?

I was told that a 22 win mag would penetrate a bullet proof vest so I assume that 17 hmr does and FN and HK developed the 5.7 and 4.6 to penetrate body armor. So my question is how do the 17hmr and the 17 mach 2 compare? I know nothing about the 17hmr and the 17 mach 2. ANy help would be appreciated.

 

[rangerruck]

this page will tell you all you need to know about the rimfires. I seriously doubt a rimfire could break through body armour, but if one could, i would say it would be a 17 hmr, 25 grn , out of a 24 inch bbl.
http://www.varmintal.com/17hmr.htm
the 5.7 is designed for penetration, it has the steel core, and is a heavier bullet, and it is centerfire.
4.6 is a 17 cal bullet, depends really on the cartridge you put it in.
a 17 remmy or 17 mach 4, centerfires, i bet would both penetrate a vest.

 

[beerslurpy]

With full auto, even 22LR can go through body armor. There was a drum fed 22LR that fired at 1200 rpm and could supposedly eat through vests very quickly. American Arms 180? I cant remember the exact name.

Velocity is what goes through vests so I would think the 17HMR would probably have a pretty good shot at it. Dunno what kind of trauma would happen on the other side though, as it is little more than an airgun pellet.

 

[50caliber123]

high velocity bullets with little mass will go through soft armor. TO go through ceramics and other hard armor, you need a bullet with more mass. This is why a .308 AP will pierce through armor better than a .223 AP round.