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I am saying that if you fix the OAL of two cartridges and load the same bullet - one to be 55,000 PSI in a 300 AAC BLACKOUT chamber and load the other to be 55,000 PSI in a 300 Fireball or Whisper(R) chamber and use the same barrel blank for each, the 300 AAC BLACKOUT will be higher velocity.
So in effect, the 300 AAC BLACKOUT can get 16 inch 300 Fireball performance from a 12.5 inch barrel.
The difference being like comparing 6.8 SPC-II to 6.8 SPC SAMMI.
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R&D for AAC
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