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Does the 5.56x57 (22-06) cartridge exist?

 
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  #1  
Old 08-18-2013, 08:44 AM
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Does the 5.56x57 (22-06) cartridge exist?

I know that the 6.5x57 IS out there - aka the 25-06. But in my desire to jump into the high-end 22 cal game, I have decided to go beyond the 220, which I already have dies for. Now I want to go right to the most barrel-burning top-end 22CF case out there. I think that case might be the 22-06, which would be a necked-down 25-06 case, which is a necked-down 30-06 case.

My questions are:

Is that the one I should be looking for, or is there another one out there with even MORE oomph (powder capacity)?

Since I don't really want to have to go custom on a die set, that round wouldn't still be under "wildcat" status, would it?

If it is, then what IS the wildest (top) dog of the 22 cal variety, that is not so wild as to be cat?

Also, if the above doen't pan out, what are the highest capacity [non-custom] .243/6mm case dies available?
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Old 08-18-2013, 09:30 AM
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Re: Does the 5.56x57 (22-06) cartridge exist?

Here's a little badazz ferya ...

.50 BMG necked down to .22 | The Firearm Blog
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  #3  
Old 08-18-2013, 09:36 AM
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Re: Does the 5.56x57 (22-06) cartridge exist?

try the 22 catbird[270 necked down to 22] or the 22 tth[Texas Trophy Hunter].it is very hard to find a wildcat round that someone has not already tried and named.
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  #4  
Old 08-18-2013, 09:59 AM
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Re: Does the 5.56x57 (22-06) cartridge exist?

your talking apples and oranges! The 22/57mm case is really nothing but a .224/ 6mm Remington case. The 22/06 is a completely different animal as the case length is about 64mm long. Both are grossly overbore, and in the end will give you a short barrel life. There's also the .224 Vias, and that's pretty much nothing but a 6.5x55 improved necked down to .224. The shoulder is also pushed back a couple millimeters. Seems to work best with 70 grain and bigger bullets. Still somewhat hard on a barrel, but still not as bad as the others would be.

You might also want to check out the .220 Jaybird. It's a full two inch long case that is improved with a .30" long neck. Once again best with 75 grain and heavier bullets. Kind of like a 22-250 AI on steroids!
gary
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  #5  
Old 08-18-2013, 11:08 AM
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Re: Does the 5.56x57 (22-06) cartridge exist?

Those were some pretty quick reponses.

I actually HAVE seen that pic of the 50BMG necked down to .22, next to the (20 gauge, I think) shotshell. I must say that it IS kind of cool to see it again though. My question is did someone actually physically do it, or is it photoshopped? Either way, I can't see it actually working without blowing up, unless it it is SEVERELY under-loaded to like <25%. But then what would be the point? Has anyone looked at the 22-243 dies thread (currently running, near-top), where one of the responders actually DID do a 30cal neckdown of the 50BMG cart. Unless he is BSing, he claims 5850fps, pushing 180gr pills. It did evoke a response from me!

I have heard of the TTH and the catbird, which apparently DOES use the "06" or "x57" case, since it is .270 based.

Are dies for either of those, or any of the others mentioned for that matter, available without going "custom'?

P.S. - By "x57", I am referring to the case's volumetric capacity, NOT an actual size measurement.
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  #6  
Old 08-18-2013, 12:20 PM
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Re: Does the 5.56x57 (22-06) cartridge exist?

Quote:
Originally Posted by Max Heat View Post
Those were some pretty quick reponses.

I actually HAVE seen that pic of the 50BMG necked down to .22, next to the (20 gauge, I think) shotshell. I must say that it IS kind of cool to see it again though. My question is did someone actually physically do it, or is it photoshopped? Either way, I can't see it actually working without blowing up, unless it it is SEVERELY under-loaded to like <25%. But then what would be the point? Has anyone looked at the 22-243 dies thread (currently running, near-top), where one of the responders actually DID do a 30cal neckdown of the 50BMG cart. Unless he is BSing, he claims 5850fps, pushing 180gr pills. It did evoke a response from me!

I have heard of the TTH and the catbird, which apparently DOES use the "06" or "x57" case, since it is .270 based.

Are dies for either of those, or any of the others mentioned for that matter, available without going "custom'?

P.S. - By "x57", I am referring to the case's volumetric capacity, NOT an actual size measurement.
when you move into overbore cartridges you start to reduce barrel life and built in accuracy, plus they seem to get a little finicky with their loads. The Jaybird is about it with the .224 caliber, and it's overbore till you get past 75 grains. The 22-243 family are well known barrel burners mostly due to their shoulder neck design. That's the one serious advantage the Jaybird has over the others. Uses a 35 degree shoulder with a .300" neck length. I'd rather have had a 30 degree shoulder, but that's just me (less of a doughnut problem than the 40 degree shoulder). You can have a huge case capacity, but you simply can't burn all that powder with a more common length barrel. Plus the Hogdon manual has loading data in it.
gary
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  #7  
Old 08-18-2013, 12:49 PM
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Re: Does the 5.56x57 (22-06) cartridge exist?

RCBS and Redding both make dies for the 22-284, which would have a very similar case capacity to a 22-06. I don't have any experience with the cartridge. I can only confirm its existence.

The x57 you keep referring to is a Mauser case, not a 30-06. The 30-06 has more capacity. I do think 22x57AI would be interesting. I would expect it to be somewhere between 22-243 and 22-284 in case capacity and performance. In any of those, I would expect heavy for caliber bullets and ultra slow powders to be the way to go.

I am thinking Quickload would be a useful tool to get a ballpark idea of what to expect from rounds like these.
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