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The reamers are not the same. They can't be, as I never saw a 300 Whisper(R) reamer drawing when we came up with the 300 AAC BLACKOUT chamber specs. So what are the odds they are the same?
We tested longer OALs and beyond a certain point they bind up the AR magazine. But you may not notice this if you don't fill 30 round magazines or shoot thousands of rounds of ammo.
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R&D for AAC
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