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Old December 18, 2019, 09:21 PM   #4
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Join Date: November 5, 2016
Location: DFW, TX
Posts: 1,034
The 7.62x51 has much more recoil than 5.56, which made it difficult to deliver rounds accurately in automatic fire. I think the 6.8 caliber bullet was a compromise between the two.
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