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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
New toy. Rem aac sd 300 blkout
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<blockquote data-quote="azsugarbear" data-source="post: 781110" data-attributes="member: 4809"><p>I shoulod probably clarify:</p><p> </p><p>My weapon is chambered in 300 Whisper (basically identical to the 300 AAC Blackout. The barrel has a 1-in8 twist and is 11" in length. gas block is adjustable for both supersonic and subsonic.</p><p> </p><p>Keep in mind that the speed of sound is variable, depending on your altitude. When I first loaded up some to try at the range in Phx, AZ - some loads were transonic, so I still got the "crack" when it went off. Next, I loaded them just under transonic. Worked like butter - until I took it up to the mountains at 7000+ elevation. All of them gave me a "sonic boom". Be sure you load them well under the 1050 fps max if you want them silent no matter where you shoot.</p><p> </p><p>BTW - the 240 gr. SMK's would barely stabilize in my 1-in-8 twist at subsonic speeds. They began to keyhole right at 25 yds. Sweet!</p></blockquote><p></p>
[QUOTE="azsugarbear, post: 781110, member: 4809"] I shoulod probably clarify: My weapon is chambered in 300 Whisper (basically identical to the 300 AAC Blackout. The barrel has a 1-in8 twist and is 11" in length. gas block is adjustable for both supersonic and subsonic. Keep in mind that the speed of sound is variable, depending on your altitude. When I first loaded up some to try at the range in Phx, AZ - some loads were transonic, so I still got the "crack" when it went off. Next, I loaded them just under transonic. Worked like butter - until I took it up to the mountains at 7000+ elevation. All of them gave me a "sonic boom". Be sure you load them well under the 1050 fps max if you want them silent no matter where you shoot. BTW - the 240 gr. SMK's would barely stabilize in my 1-in-8 twist at subsonic speeds. They began to keyhole right at 25 yds. Sweet! [/QUOTE]
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Rifles, Reloading, Optics, Equipment
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New toy. Rem aac sd 300 blkout
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