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The Range
NFA & Class III Discussion
.300 Blackout. Owning an AR pistol and rifle.
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<blockquote data-quote="Seth247" data-source="post: 1322903" data-attributes="member: 12010"><p>The .300 whisper was based on the .221. IDK which Remington based the blackout on. I guess it comes out to the same thing in the end. </p><p></p><p>I know there were rumors that the .223/5.56 case was not quite thick enough for making .300 whisper safely but I know if you had a non-whisper chamber bored at .300/.221 or whatever they called it then you could use 5.56 brass safely. (I "know" all this cause I just read it on wikipedia<img src="/images/smilies/wink.png" class="smilie" loading="lazy" alt=";)" title="Wink ;)" data-shortname=";)" /> ) I would think Remington would use the chamber specs that allowed use of 5.56 brass for .300blk manufacturing. Since it would be cheaper and reloader friendly.</p></blockquote><p></p>
[QUOTE="Seth247, post: 1322903, member: 12010"] The .300 whisper was based on the .221. IDK which Remington based the blackout on. I guess it comes out to the same thing in the end. I know there were rumors that the .223/5.56 case was not quite thick enough for making .300 whisper safely but I know if you had a non-whisper chamber bored at .300/.221 or whatever they called it then you could use 5.56 brass safely. (I "know" all this cause I just read it on wikipedia;) ) I would think Remington would use the chamber specs that allowed use of 5.56 brass for .300blk manufacturing. Since it would be cheaper and reloader friendly. [/QUOTE]
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.300 Blackout. Owning an AR pistol and rifle.
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