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Just curious....with all the interest in high velocity .22 caliber centerfire rounds (particularly for big game) why is there no interest in what I see as an obvious choice.....the 7x57mm necked down to .22 caliber.
I see the .22-243 mentioned occasionally and the AI version of the .22-250, but never the .22x57mm. It seems odd as a properly designed case (OK, I'll actually say.....an AI, sharp shouldered version) should outperform everything else mentioned.
It is almost a perfect copy of the .220 Swift without the "problems" of the semi-rimmed cartridge. With a sharper shoulder and a better twist rate (after all it will be a wildcat and can have whatever twist you want) it should shine with heavier bullets and perform like a champ at long range. If (and that's a big IF) you consider the hot .22's to be a proper deer rifle....it would seem a "natural" for the heavier 60-75 grain bullets at a decent velocity....and "great" at long range for the lighter 50-60 grain bullets for varmits.
I admit I've kicked this idea around for years (since the early 70's), but never actually built a rifle in this caliber. Is there some reason I'm not seeing that has kept this idea from being explored by others?
I hate change, it's never for the better.... Grumpy Old Men
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Campfire Ranger
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Campfire Ranger
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Just curious....with all the interest in high velocity .22 caliber centerfire rounds (particularly for big game) why is there no interest in what I see as an obvious choice.....the 7x57mm necked down to .22 caliber.
I see the .22-243 mentioned occasionally and the AI version of the .22-250, but never the .22x57mm. It seems odd as a properly designed case (OK, I'll actually say.....an AI, sharp shouldered version) should outperform everything else mentioned.
It is almost a perfect copy of the .220 Swift without the "problems" of the semi-rimmed cartridge. With a sharper shoulder and a better twist rate (after all it will be a wildcat and can have whatever twist you want) it should shine with heavier bullets and perform like a champ at long range. If (and that's a big IF) you consider the hot .22's to be a proper deer rifle....it would seem a "natural" for the heavier 60-75 grain bullets at a decent velocity....and "great" at long range for the lighter 50-60 grain bullets for varmits.
I admit I've kicked this idea around for years (since the early 70's), but never actually built a rifle in this caliber. Is there some reason I'm not seeing that has kept this idea from being explored by others?
Been done. .22 Newton and .224TTH (via the 6mm Remington) are based on the 7x57 case.
Last edited by hillbillybear; 01/04/14.
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Campfire Outfitter
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22x57 = 22-6mm, or 224 TTH.
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Campfire Regular
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There are several .22x57's already; The 22 TTH based off the 6mm Rem case which is a derivative of the 7x57. Then there is the 5.6x57 RWS.
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Campfire Tracker
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It is a factory round from RWS named the 5.6x57mm RWS, load data is in the Hornady Reloading Manual. Brass is available from Huntington's.
I'm slow
Last edited by erich; 01/04/14.
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Campfire Oracle
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A 6mm Rem is a 7x57 necked down and so a .22-6mm is a.22x57. Here is my "22x57" or aka .22-6mm. ![[Linked Image]](http://i1243.photobucket.com/albums/gg546/elkhunterinnm/IMG_0009_zps16d5a8d2.jpg)
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Campfire 'Bwana
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And before y'all were born(or some of you  ....it was called the .224 Clark.  Had a fast twist tube and slung 70-80 gr 22 cal bullets. For those who think the current trend along these lines is "new". 
The 280 Remington is overbore.
The 7 Rem Mag is over bore.
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Campfire Outfitter
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The 224 Clark is an improved version of the 22-6mm, I believe. There's a good article about it in the Big Book of Wildcats.
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Campfire 'Bwana
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Campfire 'Bwana
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pg they made it out of 257 Roberts brass IIRC(6mm stuff by any other name);and yes as I recall it was slightly blown out but my memory maybe failing 
The 280 Remington is overbore.
The 7 Rem Mag is over bore.
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Campfire Kahuna
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Campfire Kahuna
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A 6mm Rem is a 7x57 necked down and so a .22-6mm is a.22x57.
Here is my "22x57" or aka .22-6mm.
I could be wrong, but I always thought the 6mm was based on the old 6 Lee Navy Cartridge ?
"Allways speak the truth and you will never have to remember what you said before..." Sam Houston
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Campfire 'Bwana
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A 6mm Rem is a 7x57 necked down and so a .22-6mm is a.22x57.
Here is my "22x57" or aka .22-6mm.
I could be wrong, but I always thought the 6mm was based on the old 6 Lee Navy Cartridge ? chlin: Nope that's the 220 Swift. The 6mm Remington is based off he 7x57(or 257 Roberts).
The 280 Remington is overbore.
The 7 Rem Mag is over bore.
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Campfire Outfitter
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pg they made it out of 257 Roberts brass IIRC(6mm stuff by any other name);and yes as I recall it was slightly blown out but my memory maybe failing I believe you're correct. The 224 Clark was originally made from 257 Roberts brass.
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Campfire Outfitter
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I'm pretty sure I recall Rick Jamison had a version called a 22-6mm CJ?
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Campfire Oracle
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Campfire Oracle
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Nope,chlinstructor the 6mm Rem is a 7x57 necked down to .243" caliber. The .220 Swift is a 6mm Lee Navy necked down to .224" caliber.
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Campfire Tracker
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3Another one was the 226Barnes QT,used a257 Ackley inproved and necked down to use the 228 bullet of 125 grains and needed a 5 1/2 twist used 49 grs. of MG pwdr. Cheers NC
don't judge until you have walked a mile in other persons' moccasins'
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Campfire 'Bwana
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AB I don't know...sorry.  Could be....the idea has been around awhile.
The 280 Remington is overbore.
The 7 Rem Mag is over bore.
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Campfire Kahuna
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Campfire Kahuna
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Nope,chlinstructor the 6mm Rem is a 7x57 necked down to .243" caliber. The .220 Swift is a 6mm Lee Navy necked down to .224" caliber. Yep. You jogged my old memory. It was the .220 Swift based on the 6mm Lee Navy case.
"Allways speak the truth and you will never have to remember what you said before..." Sam Houston
Texans, "We say Grace, We Say Mam, If You Don't Like it, We Don't Give a Damn!"
~Molɔ̀ːn Labé Skýla~
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Campfire Oracle
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Campfire Oracle
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Life Member SCI
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Member New Mexico Shooting Sports Association
Take your responsibilities seriously, never yourself-Ken Howell
Proper bullet placement + sufficient penetration = quick, clean kill. Finn Aagard
Ken
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I know they exist.....just curious why the 5.6x57 isn't more popular. The old Lee Navy is basically a 7x57mm with a semi-rim. Same capacity and shape.
5.6x57, 6mm Remington, .257 Roberts, 6.5x57, and 7x57 are a family type round. Guess you could actually add the 8x57, 9x57 and 9.3x57 (an overlooked, but great round) as well.
I hate change, it's never for the better.... Grumpy Old Men
The more I learn, the more I realize how little I know
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elkhunternm
What kind of performance are you getting from your "22-57".
Thanks for your time. Cheers NC
don't judge until you have walked a mile in other persons' moccasins'
SUM QUOD SUM........HOMINEM TE ESSE MEMENTO
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