Hornady Whisper(R) ammo has a 300 AAC BLACKOUT case length.
The AAC 9 inch upper was tested at an average of five consecutive five shot groups - 1.1 MOA - Berger 110 bullets. Sierra 110 bullets were about 1.2 MOA.
A 16 inch fixtured test barrel, 1/8 twist, with a 300 AAC BLACKOUT chamber - 0.8 inch group at 100 - Berger 110, again, 25 rounds. Sierra 110 was 0.9".
Just to be clear - these are not BS 3 shot groups. These were 25 shots total with all counted.
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R&D for AAC
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