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Rifles, Reloading, Optics, Equipment
AR15/10 Rifles
Will 223 work in a 5.56 chamber?
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<blockquote data-quote="Bullet bumper" data-source="post: 649165" data-attributes="member: 17844"><p>There is a few chamber dimentions that are different between the 223 Rem And 5.56 Nato . </p><p>Generally the Nato chamber has bigger diameter on the shoulder and base and longer fee bore as well as longer from base to shoulder .</p><p>So sometimes it is possible for a 5.56 Nato to not chamber or chamber tight in a 223 Rem chamber and when fired has less expansion space and shorter throat area. So that can raise pressures . How much is hard to say .</p><p>223Rem in a Nato chamber should show less pressure than they would in a 223 Rem. chamber . However the cases will undergo about .004 more stretch.</p><p>Not withstanding normal chamber variations and ammo case variations which can add upp or subtract from the whole issue .</p><p>Meaning one gun might digest everything and another will not.</p><p>However even though the max staed load pressure for a 223 is 55 000 psi modern guns are proofed at 125% of that and the 223 case can stand 62 366 psi .</p><p>The 5.56 Nato max pressure is 62366 psi also. </p><p>So if you fired a 5.56 Nato in a 223 Remington chamber it would have to develope 68750 psi to equal the proof charge and I don't think it would . I don't think it would blow up a modern gun but chambering and extraction issues could be possible in some guns.</p></blockquote><p></p>
[QUOTE="Bullet bumper, post: 649165, member: 17844"] There is a few chamber dimentions that are different between the 223 Rem And 5.56 Nato . Generally the Nato chamber has bigger diameter on the shoulder and base and longer fee bore as well as longer from base to shoulder . So sometimes it is possible for a 5.56 Nato to not chamber or chamber tight in a 223 Rem chamber and when fired has less expansion space and shorter throat area. So that can raise pressures . How much is hard to say . 223Rem in a Nato chamber should show less pressure than they would in a 223 Rem. chamber . However the cases will undergo about .004 more stretch. Not withstanding normal chamber variations and ammo case variations which can add upp or subtract from the whole issue . Meaning one gun might digest everything and another will not. However even though the max staed load pressure for a 223 is 55 000 psi modern guns are proofed at 125% of that and the 223 case can stand 62 366 psi . The 5.56 Nato max pressure is 62366 psi also. So if you fired a 5.56 Nato in a 223 Remington chamber it would have to develope 68750 psi to equal the proof charge and I don't think it would . I don't think it would blow up a modern gun but chambering and extraction issues could be possible in some guns. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
AR15/10 Rifles
Will 223 work in a 5.56 chamber?
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