Have a Savage model 111 in 257 Roberts. Switching to H4350, and at max load exceeded listed book velocities by 175 FPS, according to 3 different source books. Chrony gave repeat results for 2 other rifles I was double checking, no reason not to believe chrony. I know it usually takes a gross amount of excess pressure to show signs, and none were present. I am some say overly anal, and I know my scale is correct. Got 2954 FPS with Sierra 117 gr HPBT. I am not a speed demon, but kinda like the bonus velocity. Thoughts.....
Last edited by oldotter; 12/14/14.
