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Re: is the pressure difference between .223 / 5.56
[Re: roadkill]
#3075739
03/22/20 04:40 PM
03/22/20 04:40 PM
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Joined: Nov 2013
Posts: 10,389
coffee county
goodman_hunter
Booner
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Booner
Joined: Nov 2013
Posts: 10,389
coffee county
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In addition to the excellent info already given when the .223 remington was created (1957) there was no 5.56mm round. In 1980, the .223 Remington was transformed into a new cartridge, a 62-gr full metal jacket bullet with a 7-gr steel core for better penetration and designated 5.56×45mm NATO (SS109 or M855). That's why on some old rifles like Colt ar15, it say 223 but is acceptable to fire 556. Or so I've been told.
Last edited by goodman_hunter; 03/22/20 04:41 PM.
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