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5.56/.223 again |
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Irish Bird Dog
.416 Rigby Too many Joined: 01 March 2009 Location: Midwest Status: Offline Points: 5511 |
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Posted: 13 May 2014 at 17:25 |
I have read about the leade difference with the 5.56 & .223 Rem. Have never seen any reloading dies labeled for 5.56.
So, the question becomes this: when you use standard .223 Remington dies to load military 5.56 brass....what do you end up with? Regards to chambering: does the resized 5.56 brass then become a .223 Rem case or is the leade still a factor? |
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Irish Bird Dog
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CB900F
Administrator Honor, Integrity Joined: 10 June 2003 Location: Eritrea Status: Offline Points: 8857 |
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IBD; A large part of the difference is in the brass itself. True 5.56 brass will have the NATO designator (cross in the circle) symbol in the headstamp. That brass will be heavier than commercial brass, because NATO use includes the SAW fully automatic machine gun. Therefore, NATO 5.56 brass has less internal volume than commercial brass & you'll get a higher pressure spike with NATO brass for a given weight of powder and the same bullet. 900F |
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RobertMT
.416 Rigby Joined: 12 March 2008 Location: United States Status: Offline Points: 4413 |
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I've weighed a bunch of brass, 5.56 isn't neccessarly heavier. 7.62x51 is most often heavier than .308, people expected same on 5.56. If you load for 5.56 chamber, you can load a bit hotter, than .223 chamber. If you load 5.56 brass to 223 pressure, you can shoot it safely in either. I have couple ARs with 223 match chamber, they're setup for 77gr bullets, loaded mag length, with .010" jump. If you shot a 5.56 62gr green tip rd, bullet would be jammed, if it fully chambered, along with higher chamber pressure, you would blow primer. |
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Irish Bird Dog
.416 Rigby Too many Joined: 01 March 2009 Location: Midwest Status: Offline Points: 5511 |
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Well, two different opinions/thoughts on the brass thickness of 5.56 stuff. My AR is chambered 5.56/.223 so I don't have any issues there I believe. Was just wondering....thicker brass could be a factor if it is truly the case (pun intended).....I load to .223 sporting load data anyway so should be reasonably OK.
Meanwhile I found this site: http://www.razoreye.net/mirror/ammo-oracle/AR15_com_Ammo_Ora cle_Mirror.htm Lots of "info" here for sure....didn't find a definitive answer to whether NATO/military brass is thicker than .223 (Remington) caliber civilian brass. Edited by Irish Bird Dog |
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Irish Bird Dog
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