ffgats Posted January 10, 2017 Share Posted January 10, 2017 I just rebarelled my AR to a 223 Wylde ( Rainier Ultra Match) and my 3k prep brass from my previous 5.56 bbl some wont extract ( dummy rounds). The prep brass shoulder measured 1.445" using Sinclair shoulder bump gauge, this brass feed and extract 100% from my old Noveske 5.56". So adjusted my sizing die so the shoulder now measures 1.425" . Is this number looks to low? All along I thought 223, 223 Wylde and 5.56 has the same OD of their brass. Share your opinions please , thanks Link to comment Share on other sites More sharing options...
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