Originally Posted by
1168
I have witnessed on my Labradar single round velocity spikes of greater than 200fps with Frontier 68gr ammo in otherwise consistent strings of 10. This yielded velocities 180fps higher than (real, not XM) M855 fired through the same barrel, same day, same temp. This has happened twice, IIRC, in two different 5.56 marked barrels that both pass a Michiguns 5.56? Gauge and were in good condition, with a LMT E-Bolt. (Edit: at least 3 times. One of which was a “5.56 Match Mod 0” chamber with a Colt bolt. This barrel is old and starting to slow down.) I thought the first time was an equipment fluke, because it was an unbelievable number for factory ammo. Makes me wonder how many of these Project Eldest Son proof loads went un-measured before I realized it was no fluke.
Thank you, I was unaware that LC varied so much.
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