The 5.7x28 round was designed for a PDW (Personal Defense Weapon), the FN P90. FN designed the FiveSeven pistol after the P90 was already on the market. PDWs are the concept of a SMG sized weapon with rifle like penetration of body armor at short range. They're intended to replace handguns for drivers and other troops in similar roles who don't need the range of a rifle, and for whom the size of a rifle interferes with carrying out their duties. Unless you need increased armor penetration capabilities at the cost of reduced wounding capability the 5.7x28 round, in either pistol or PDW, isn't really practical.the FN 5.7mm round that's designed to replace 9mm uses pointed bullet, and so much better it almost became the standard NATO round, so i doubt round nose for handgun is the best way to go...
If I'm remembering correctly... There was talk of making it NATOs standard PDW caliber, which meants it would replace 9mm SMGs and some pistols. The only reason they even considered this was to defeat body armor, NOT because 5.7mm beats 9mm.the FN 5.7mm round that's designed to replace 9mm uses pointed bullet, and so much better it almost became the standard NATO round, so i doubt round nose for handgun is the best way to go...
Most handgun bullets in conventional cartridges don't have high enough velocity, nor are shot at great enough distances, to make any difference. To get this "tumbling" effect you need rifle velocities. With less velocity, more of a flat nose or hollowpoint shape is needed to cause maximum damage to live tissue. Round nose bullets, however, are needed to function through an autoloading action.instead of pointed like a rifle round? wouldn't pointed nose make it more areodynamic and easier to tumble inside target?
5.7mm from fiveseven can reach 2000f/s+Yes, there is a very good reason.
Most modern handguns & the calibers they are chambered for are limited by how much pressure they can withstand.
Even with all the modern proplllent improvements.
There is still no way to hot load one to get rifle velocity, which is necessary to get rifle performance out of a spitzer bullet.
And even if you could, recoil & muzzle blast would be so bad you couldn't use it for the intended purpose it was designed for.
rc
The FN 5.7 guns or cartridge were not designed 100 years ago.there's no reason handgun round designed a hundred years ago can't be improved
Note, it's also spitting a 30ish grain bullet. No wonder it's fast, it doesn't weigh anything!5.7mm from fiveseven can reach 2000f/s+
http://en.wikipedia.org/wiki/FN_Five-seven
that's not as fast as rifle, but way faster (close to double) 9mm and cause considerable hydrostatic shock:
http://en.wikipedia.org/wiki/Hydrostatic_shock
i already provided the link, under "Ammunition selection for self-defense, military, and law enforcement", quote:I've never heard that 5.7mm causes "considerable hydrostatic shock". I doubt there's enough energy there. 5.7mm is cool, but it really isn't "better" than any other mainstream pistol caliber with the exception that it can beat armor.
This leaves us with the obvious conclusion that the 5.7x28mm cartridge has little advantage over the .22 WMR in terms of killing power and serious disadvantages in terms of the price and availability of both firearms and ammunition. Without doubt, being shot with either can have deadly results, but there are much greater threats and more important things with which to be concerned.
Yes, they have.A number of law enforcement and military agencies have adopted the 5.7x28mm cartridge