Originally Posted by
tcoz
41.8, 42.1 and 42.4 are the three consecutive charges with the least vertical spread so I'm going to shoot a group of 20 with each charge. From that I'll use the charge with the best overall group.
I matched the ogive to base OAL in all of the test rounds to Hornady 168gr HPBT Match ammo which gave a 0.077" jump to the lands in my rifle. I'll work the final load down in 0.010" increments and see whether the groups tighten.
Unfortunately I only get to the range once every 2-3 weeks so this turns into a two month project.
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