The Redding is not 300 Whisper(R) but rather Redding's version of 30-221. There is no standard for 30-221 and so there is no way to know without comparing Redding's drawing to a 300 AAC BLACKOUT drawing. Only Redding can make that determination as only they have the specs for their die.
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R&D for AAC
Last edited by rsilvers; 11-06-2010 at 12:13 AM.
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