Gents, I put the Chrono on a M855 and it was 2900 FPS. My AR is a 16 inch, 1-9 twist, stock barrel. The best load I was able to work up was 25.0 gr. It produces 2916 FPS. Closer, yet not the same as the M855 powder charge. It shot as well as the 23.7 load at 2758 FPS.
