5.7x28mm? Pfft, that's a piker/wannabe round...

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You guys have left one thing unnoticed. the 5.7x28 cartridge family was created in Europe. So? We don't have such a variety of different types of rounds over here. Here it is one of the few of such calibres for pistols and SMGs, other similar is HKs 4.6x30 (this one being 2nd gen and 5.7x28 1st gen PDW cartridge of this kind).
 
anyone have a link to a procedure for home-grown annealing in the oven
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Most folks that anneal their brass only treat the neck. One way I've heard of from people here on THR is to first decap the brass (w/o resizing) and the place them case head down (neck up) in a pan that is deep enough to fill with water up to just below the shoulder. Then fill to that level with water. Take a propane torch (lit, of course) and heat the neck and shoulder 'til the brass glows from the heat. Then tip it over into the water to quench. When done with a batch, remove and let dry. Then size, prime, charge, seat, shoot. Lather, rinse, repeat. Most folks that bother to anneal typically only do so every 5th loading or so for high-power rifle rounds. For you, probably just the initial annealing before necking down will be enough to last for quite a while. It might not be a bad idea though, to anneal again after the first firing and then after every 5th-10th loading if brass is scarce.
 
This could be a good option for those of use without the $1000 to drop on a Five-seveN.

I've been informally working on a 6x23mm pistol cartridge, based on shortening the 10mm case 2mm and necking it to accept 6mm bullets. I then cut down 90 gr. FMJ Sierra's to fit it (they end up about 55 grs.). Should be able to push a 55 graiiner well over 2200 FPS from a 5" tube, given 10mm auto pressures. But I can't find anyone willing to make a barrel for my Witness in this custom chambering, so the project is on the backburner. :(
 
Have you tried Krieger? They usually make rifle barrels, but they might willing to make your pistol barrel if you paid enough for it. They do make some pistol caliber barrels, but those might be intended for carbines rather than handguns.
 
Ok, there are a few things you guys need to realize.

#1) even the 22lr has a bullet diameter of .223, so it doesnt realy mater. virtualy all 22 caliber rounds regardless of primer type have bullets .223" in diameter.

#2) This is NOT true of the FN 5.7 the bulelts are slightly smaller diameter than the standard .223. They are .220" in diameter. This is why the bullets used are generaly slightly smaller. Use of a .223 diameter bullet will result in higher chamber presures, and is dangerous.

#3) the .22lr has NO jacket. some rounds are electroplated in a copper wash, but this is not the same thing. the coper film on the rimfire rounds is mainly there to reduce fouling int he barrel, and has no percievable effect on penetration. an ACTUAL jacket, such as on the 5.56 NATO, 5.7x28, or the Reed wildcat plays a significant roll in delaying the bullets deformation, resulting in better penetration.

#4) The reed wildcat puches a heavyer bullet of comperable (but different) diameter at the same speed as the 5.7. In the real world, this means it would penetrate better than the 5.7, as it has bolth more momentum, higher sectional dencity, and more kinetic energy. It also has a higher BC that would result in an even flater trajectory. That IS the POINT of making wildcats folks; to make a BETTER round. Dont act all supprised when it it. :rolleyes:

This is nothing new. for instance: the Tactical Twenty is bolth older, and more powerfull than the .204 Ruger, but guess wich one got chambered in factory rifles? The one that had the backing of a powerfull gun maker. Same deal with this new cartridge. the 5.7 will likely be more sucessfull, even though its the lesser cartridge, because its got FN's weight behind it. The .223 Reed will likelly go the way of the twenty tactical, and join the cartridge bone yard in just a few years.

On the pluss side, if you already own and reload for the CZ-52, then this is no big deal. Just form your own cases from spend 7.62x25, and load it with standard .223 bullets. It hink that is the biggest thing this new cartridge has going for it: the simple fact that its so easy to make, and the components are so readily avalable.


O, and Mac shooter, you do know that you can just BUY 55gr bullets in .243 dimeter right? that would make it ALOT easyer on you.
 
In ballistic testing the round even when it does yaw gives no better of a wound track than standard NATO 9mm hardball. It's sole purpose is to penetrate soft body armor since the 9mm NATO won't. Since we can't buy the armor penetrating rounds here and most bad guys don't wear body armor (although some do) anyways what good is it? Your better off with a 9mm on up round with a good jhp for almost all possible civilian uses. Plus have you priced ammo for this lttle gun? About a $1.00 a round if your lucky to find it. I'll stick with my regular 100 year old or so 9mm and .45 with good jp's thank you.
 
#1) even the 22lr has a bullet diameter of .223, so it doesnt realy mater. virtualy all 22 caliber rounds regardless of primer type have bullets .223" in diameter.

#2) This is NOT true of the FN 5.7 the bulelts are slightly smaller diameter than the standard .223. They are .220" in diameter. This is why the bullets used are generaly slightly smaller. Use of a .223 diameter bullet will result in higher chamber presures, and is dangerous.
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Technically, only the .22lr uses a .223" bullet. The .22mag, and all .22 centerfires use .224" bullets. Also, the 5.7 uses .224" bullets. I mic'd one a coworker brought in and it was dead nuts .224" at just above the case mouth. 5.7mm = 0.2244".
 
Yea? Bullets can varry .001 withought much difference.

Also, the 5.7 is listed as having a case mouth dimeter of .220. If they are .224, then something is fishy.
 
It's sole purpose is to penetrate soft body armor since the 9mm NATO won't. Since we can't buy the armor penetrating rounds here
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No, you can't *buy* them, but you can buy the components and make them in the .22 reed wildcat. And hard .22 bullet at that speed will bust through soft body armor worn by bad guys pretty easily. And I'd venture a guess that the so-called 'non-penetrating' 5.7 ammo will also go through at least IIs, and probably IIAs.
 
Technically, only the .22lr uses a .223" bullet. The .22mag, and all .22 centerfires use .224" bullets. Also, the 5.7 uses .224" bullets. I mic'd one a coworker brought in and it was dead nuts .224" at just above the case mouth. 5.7mm = 0.2244".
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Technically, No. The .22 Jet and .22 Hornet both used .223" bullets, and the original .22 Jet used .222" bullets. Now however most T/C barrels for both and standard production .22 Hornet barrels use the common .224" bullets. Then there are the REAL odd ball .22's like the .22 Savage Hi-power with it's .227" bullet, and the .228's and .229's of different wildcat creations.

However, yes the 5.7x28 does in fact use common, everyday .224" bullets as does our cartridge.

On the 6x23 cartridge, MachIV we can get it built for you, though I hate to say I would not pick the Witness as the first test pistol. But, however you want to go about it is all up to the creator. Good idea all the same, have you thought about using the 10mm Mag case to provide a longer neck? In any event, drop me an e-mail I'll give you all the help I can.

Annealed and formed .22 Reed Express brass should be ready in the next week or so for those of you who'd rather not delve into yourself.
 
the Tactical Twenty is bolth older, and more powerfull than the .204 Ruger
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:confused: The Tac .20 is based on the .223, while the .204 Ruger is based on the .222 Rem Mag. Being that the .222 RM case is 2mm longer than the .223, this claim just doesn't add up.

O, and Mac shooter, you do know that you can just BUY 55gr bullets in .243 dimeter right? that would make it ALOT easyer on you.
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I am not interested in using expanding bullets for this project. Also, the 55 gr. 6mm bullets have a more slender ogive, which results in a longer loaded length for the same bullet weight. Won't work in a 10mm magazine.
 
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