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The new 6.8x51mm round can push a 135gr bullet at 3,000 fps out of a 16-inch barrel, and with a 80,000 psi chamber pressure. A 300 Win Mag round can do better with lower chamber pressure (about 62,000 psi), but is too much bigger.
If defeating body armor is the major reason of the new round, is the current 7.62x51mm round worth of improvement?
The M240 machine guns will be re-barreled for the new round.
If defeating body armor is the major reason of the new round, is the current 7.62x51mm round worth of improvement?
The M240 machine guns will be re-barreled for the new round.