Hornady 350 grain JSP sized to .452"
Posted: Sun Jul 26, 2020 10:27 amFinally got to test the resized Hornady 350 gr JRN. Loaded in Hornady brass trimmed to 1.690". Loaded rounds with RL-7. Best charges were 36.2 grains and 36.6 grains. Bullet seated to 2.158". All testing at 100 yards with 78 degrees and 90% humidity. Fired in bolt action with a 16" barrel and 16" twist.
36.2 grains yielded 1619 fps with SD/ES of 8/16. Put 3 into 1.580". Kinetic energy of 2037 ft/lbs for both loads.
36.6 grains gave the same 1619 fps average with SD/ES of 12/24 and averaged 1.319" group. I'm going to slowly increase the powder charge to determine a max safe charge.
36.2 grains yielded 1619 fps with SD/ES of 8/16. Put 3 into 1.580". Kinetic energy of 2037 ft/lbs for both loads.
36.6 grains gave the same 1619 fps average with SD/ES of 12/24 and averaged 1.319" group. I'm going to slowly increase the powder charge to determine a max safe charge.