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Rifles, Reloading, Optics, Equipment
Reloading
5.56 Nato convertion in 223 Rem
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<blockquote data-quote="nvschütze" data-source="post: 1823334" data-attributes="member: 110896"><p>The military brass has a slightly lesser case capacity (thicker web and walls), so a 22.0-grain load of Powder X in a .223 case may be too much in a 5.56mm case. Best thing to do is to start a grain or two low and work up in 0.2-grain increments until pressure signs start to show. A very good indicator of overpressure is the primer being smooth and flat across the head of the case. There will be no radius on the edge of the primer where it meets the brass of the case. This is referred to as a "flat" primer. When you push the spent primer out of the primer pocket, you'll see a small ledge where the pressure of combustion forced the primer material into the chamfer of the primer pocket.</p><p></p><p>I am curious as to why you are reloading the .223Rem and/or 5.56mm NATO in the UK. I was under the impression that it was illegal to have a rifle chambered in a modern combat chambering-- such as the 5.56mm NATO-- in the EU. Britain left the EU just yesterday and as of today, is its own sovereign and independent nation again after 47 years. I suspect the English will like Liberty. We Americans are willing to fight and to die to keep ours...</p></blockquote><p></p>
[QUOTE="nvschütze, post: 1823334, member: 110896"] The military brass has a slightly lesser case capacity (thicker web and walls), so a 22.0-grain load of Powder X in a .223 case may be too much in a 5.56mm case. Best thing to do is to start a grain or two low and work up in 0.2-grain increments until pressure signs start to show. A very good indicator of overpressure is the primer being smooth and flat across the head of the case. There will be no radius on the edge of the primer where it meets the brass of the case. This is referred to as a "flat" primer. When you push the spent primer out of the primer pocket, you'll see a small ledge where the pressure of combustion forced the primer material into the chamfer of the primer pocket. I am curious as to why you are reloading the .223Rem and/or 5.56mm NATO in the UK. I was under the impression that it was illegal to have a rifle chambered in a modern combat chambering-- such as the 5.56mm NATO-- in the EU. Britain left the EU just yesterday and as of today, is its own sovereign and independent nation again after 47 years. I suspect the English will like Liberty. We Americans are willing to fight and to die to keep ours... [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
5.56 Nato convertion in 223 Rem
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