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I call it my AR47, AR 16" with 1x10 twist and carbine gas length. It cycles, but the second box of Horn 220 RN started hanging the nose sometime so I started loading some 200gr speer SP. I opened the gas hole .015 more to cycle these. So I started putting a 220 RN in chamber and 200SP in mag to hunt with. They have the same POI.
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