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WTB 10.5" or 14.5" barrel or any 1:7.5 twist carbine/rifle gas system barrel
#3
That's not true at all, Thomas. Those lengths are actually too long for the most efficient .300 BLK usage. Read here: http://www.65grendel.com/forum/showthrea...ocity-data
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WTB 10.5" or 14.5" barrel or any 1:7.5 twist carbine/rifle gas system barrel - by Haraise - 08-13-2012, 11:39 AM

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