Originally Posted by
Failure2Stop
Ok, finally rested from my 24 hours in airplanes and airports, and have access to my source data.
I can't get too specific, as there are proprietary matters, however, I can disclose that we use high-speed video and pressure sensors that are accurate to silly small measurements, and have really smart engineer guys that translate that data for knuckle-draggers like me. I was corrected in that speed of sound was the local speed of sound, not the ambient speed of sound. Mea culpa.
The collected physical data shows that the bolt carrier begins rearward movement in about twice the time it takes for the projectile to travel from the chamber to the muzzle.
As the carrier begins its rearward movement, it travels approximately 0.075" before the cam-pin hits the first angle of the cam path, which gives additional delay to unlocking.
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