Re: .300 AAC BLACKOUT
new one on me too. Seems to me you could use .300 whisper data so long as you develop carefully from starting charge. The .300 whisper is based on the .221 fireball case, so all youd have to do is find out what the H20 capacity of the .300 whisper is and compare it to the .300 AAC, if they are pretty close Id feel comfortable testing a few starting charges for the .300 whisper with whatever weight bullet youre using in the .300 AAC case.. And just proceed from there. Loose primer pockets are usually the first sign of high pressures. you will go to reprime the brass and the primers will go in without any resistence. But also bear in mind that loose primer pockets are also a sign of worn out brass so make sure you do your load development in once fired cases. and dont reload any of them until youve finalized a safe load.
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Last edited by JLA; 09-10-2011 at 02:26 PM..