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Old 07-07-2007, 10:30   #1
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Wylde chamber

How important is this if i wanted to shoot both 5.56 NATO and .223 rem ammo? Could I shoot both ammo through lets say a sabre defence AR? or wouldnt it cycle the ammo that well if i was using the 5.56 nato rounds?
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Old 07-07-2007, 11:05   #2
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If you have a nato chambering it is okay to shoot .223, not the other way around due to the slight difference in the case
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Old 07-07-2007, 15:35   #3
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Yup, the thing to avoid probably is getting a .223 SAAMI chamber because then you really should not fire NATO surplus ammo in it if it ever becomes available.

That wylde chamber (from what a kitchen table gunsmith knows) is a chamber that has a tighter headspace than a standard 5.56 NATO chamber which can be quite loose. It supposed to help the accuracy, some say it does, some say it doesn't do much. It is marketed as being safe to fire 5.56mm NATO ammo in, but i've noticed that if the round is really hot the wylde chamber guys will report pressure signs before the 5.56mm chamber owners.

To understand all the variations, I looked at headspace go and no go guages in .223 and also the 5.56 NATO go/no go/field guage dimensions. The NATO guages are slightly larger and a SAAMI .223 no go guage will close (sometimes) on NATO chambers that are still within specification.
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Old 07-07-2007, 15:55   #4
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What brands are made for the 5.56 NATO?
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Old 07-07-2007, 20:01   #5
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Afaik, all the major ar rifle makers will barrel an ar in whatever chamber you want, .223 or 5.56. 5.56 is alot more common on ar's produced right now. I think a wilde chamber might be harder to find because i've only seen it advertised on RRA's website...I don't know if they have some exclusivity on making it or not.
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Old 07-07-2007, 23:24   #6
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Wylde chambers are not unique to Rock River, although few other makers are in fact using them yet, and none of the other large makers that I know of. I do believe they will catch on, as the few makers using them, including Rock River, seem to all be known for building incredibly accurate rifles. One other gun maker I know for sure that uses a Wylde chamber in their custom uppers is White Oak Armament; I have one of their service rifle uppers with a Wylde Chamber. White Oak rifles too, are known as being leading competitive match rifles. There are probably a few makers using them too, but I haven't had a chance to look them up.

Anyway, the bottom line purpose of a Wylde chamber is to allow you to have the best of both worlds: the ability to shoot military 5.56 ammo, plus the ability to safely shoot .223 ammo with reliable extraction and match-like accuracy. A Wylde chamber is thus an improvement on the SAAMI chamber that has traditionally been used in match rifles. It's good to have a Wylde if you want to shoot both types of ammo, while still having match level accuracy potential. Some people view it as a bit of a compromise to enable you to shoot both, but on the other hand, Rock Rivers are some of the most tack-driving AR's out there, and are winning a lot of matches, so I have a hard time viewing the Wylde chamber as a compromise.

Here's how they define a Wylde chamber:


[IMG]file:///C:/DOCUME%7E1/timlt/LOCALS%7E1/Temp/moz-screenshot.jpg[/IMG][IMG]file:///C:/DOCUME%7E1/timlt/LOCALS%7E1/Temp/moz-screenshot-1.jpg[/IMG]
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Old 07-08-2007, 08:32   #7
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would i still be able to shoot both rounds if i went with a sabre defence? the one im looking at says it has a 5.56 chamber.
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Old 07-08-2007, 11:56   #8
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Originally Posted by slickest View Post
would i still be able to shoot both rounds if i went with a sabre defence? the one im looking at says it has a 5.56 chamber.
Simple answer: yes

However, Brand has nothing to do with chambering. A chamber is a specification as timlt pointed out. All the makers can meet the 5.56 NATO chamber specification. They probably buy their barrels from the same factory.
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Old 07-12-2007, 21:51   #9
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thanks guys. the help is appreciated
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