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Why the 5.7?

Discussion in 'General Gun Discussions' started by spartanpride, Mar 9, 2010.

  1. spartanpride

    spartanpride Well-Known Member

    Why do people think that the FN 5.7 cartridge is the best thing since sliced bread? Isn't it almost identical as the .22 mag? Both are around 40gr and pushing 2000 fps. Why use the 5.7 when there's the more popular and easily found .22 mag?

    FIVETWOSEVEN Well-Known Member

    There are videos on youtube showing a 5.7 x 28 compared to a .22 mag, the 5.7 is about the same as a 9mm regarding wound cavaties.
  3. Justin

    Justin Moderator Staff Member

    FWIW, the 5.7 round achieves the same velocities in a pistol that .22 magnum achieves in a rifle.

    I'm no 5.7 fanboy, but there is a significant difference between the rounds.
  4. Kingofthehill

    Kingofthehill Well-Known Member

    i think its way overhyped.

    that being said, i am looking for a 5.7 upper for my AR. lol.... 50rd mag opposed to 30 and ejects through the factory mag opening is just COOL.

    now, once i get that Upper, i plan on getting the Pistol to have a matching set because hey... its cool hahahahaha..

    Its very light recoiling, and very fast follow up's.

    but i do agree that with the CIVILIAN available ammo, its not the end all cartridge. Although the Fort Hood shooter unfortunately had good results.

  5. 7.62 Nato

    7.62 Nato Well-Known Member

    The 5.7 does have better ballistics than the .22 mag. and it is also centerfire, making it much more reliable.

    FIVETWOSEVEN Well-Known Member

    Can't you get AP rounds if they are made in the country and not prohibited otherwise?
  7. DoubleTapDrew

    DoubleTapDrew Well-Known Member

    Not for a pistol. The AP 5.7 round was available here when they brought out the PS90, until they brought out the FiveseveN, at least that's my understanding.
  8. General Geoff

    General Geoff Well-Known Member

    5.7x28mm, as Justin pointed out, has similar velocities as a .22 mag rifle, out of a pistol. It is centerfire, meaning more reliable ignition. And finally, it is a bottlenecked cartridge, meanining superior feeding and extraction reliability.

    That said, Kel-Tec is coming out with the PMR-30, a .22WMR handgun which holds 30 rounds in a flush-fitting magazine, which is likely intended as a direct (and cheaper) competitor to the FN Five-seveN pistol.

    edit; if the PMR-30 takes off, I foresee some ammo manufacturers selling .22WMR loads tailored to the short barrel of a pistol to close the gap a bit.
    Last edited: Mar 9, 2010
  9. nwilliams

    nwilliams Well-Known Member

    I like the 5.7 but I don't think it's the greatest round by any means, I have a PS90 and I really enjoy shooting it. However I bought a PS90 more for the gun than the round it fires.
  10. Hatterasguy

    Hatterasguy Well-Known Member

    The 5.7 round that they won't sell to civilians is a good round.

    The civilian version is lame and has had its balls cut off, so I'll pass.
  11. General Geoff

    General Geoff Well-Known Member

    Hatterasguy, I don't know where you hear these things from, but it is misinformation at its worst.

    Elite Ammunition sells hot-loaded ammo that surpasses the performance of the "armor piercing" military/LEO-only ammunition available in 5.7x28mm.
  12. Hatterasguy

    Hatterasguy Well-Known Member

    Oh I didn't know that. Although everything on that site seems backordered so it looks like its hard to get.

    But I'm not a fan of proprietary rounds and don't reload so I'd never buy anything in that caliber.

    IMHO your better off getting the 7.62X28, its dirt cheap and probably works about the same.
  13. browningguy

    browningguy Well-Known Member

    The 5.7x28 is a fun round with nonexistant recoil, and somewhat better than a .22 mag ballistically. As already mentioned it's also a centerfire making it easy to reload for. As far as comparing it to a 7.62x39 (I'm guessing you meant 39) they really aren't comparable. The AK/SKS round is a true intermediate cartridge with much more power, and also weight. I shoot it through an AR57 upper and find it to be decently accurate (i've only shot it out to 100 yards) and with the low recoil anyone can shoot it with ease. I've put the 6 position stock on this lower just so youngsters and small in stature ladies can also shoot it.

    With 50 rounds in a mag I wouldn't feel out of place using it as a HD rifle either.

  14. loki.fish

    loki.fish Well-Known Member

    People deer hunt with the pistol and have no issues, so I'd say it's perfectly capable. That being said, it's kind of expensive when compared to 9mm, so it turns alot of people away from it. There's skeptics for everything, I'll CC mine when I quit being lazy and find a holster for it and I'll be perfectly comfortable using it for self defense.
  15. clarence222

    clarence222 Well-Known Member

    According to the show I watched on Discovery Channel last night the round itself was designed soley for its armor piercing abilities.
  16. Hatterasguy

    Hatterasguy Well-Known Member

    Sorry ment 7.62X25.

    A hot combat proven communist round that does a number on armor.

    BTW cool rifle!

    I understand the idea behind the 5.7, it was ment to defeat body armor and replace the 9mm in sub guns. FN was going after the MP5. Not sure why it failed, but it did. HK also failed with their 4.7 or whatever it was.

    The whole idea is when swat or a special forces operator entered a room and did a center mass double tap on a bad guy, the bad guy had less of a chance of getting up if he was wearing armor and hit with a 5.7 vs a 9mm.
  17. LS240

    LS240 Well-Known Member

    7.62x25 is a great round, but unfortunately choices are rather limited as far as firearms to shoot it. I suppose the same could be said of the 5.7 as well, but at least the 5.7 is fired from newish designs with much better ergos than some outdated Russian or Czech pistol. If somebody like Glock were to make a new 7.62 Tok pistol I'd be all over it.

    As for the OP's questions, I don't think anyone is saying the 5.7 is the best thing since sliced bread. It's mostly the anti's who make it out to be some magical cop killing super cannon of death. That and any show on The Military Channel. Among firearms enthusiasts I see far more negativity than praise.

    As stated, the 5.7 has about the same velocity out of a pistol as a 22mag out of a rifle, and obviously out of a rifle the 5.7 is a lot hotter. Terminal ballistics also appear to be much better. And centerfire is both more reliable and can be reloaded. It's certainly not the best round out there, but I can see it being quite a viable self defense round. Seems in all the studies I've seen, shot placement is the biggest factor in stopping an assailant, not caliber. As long as the round can penetrate to vitals such as the heart and spinal column and has enough energy to do damage once it gets there, which the 5.7 certainly can do, it will incapacitate as well as anything else. It's probably more sensitive to shot placement than other larger and/or more powerful rounds, but assuming proper shot placement, it will do the job. That makes it perfectly viable, though I'd still rather have 5.56 any day.
  18. wlewisiii

    wlewisiii Well-Known Member

    I want a CZ-52 re-barreled for 5.7 :D

  19. 7.62 Nato

    7.62 Nato Well-Known Member

    The kel-Tec PMR-30 is the updated version of the Grendel P-30. They were both designed by the same guy. The P-30 was out long before the FN57. Production stopped with the first assault weapons ban.
  20. General Geoff

    General Geoff Well-Known Member

    Ahh, the unintended consequences of the federal AWB continue to ripple throughout the gun culture... :(

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