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8 months later…
37, 38.5 and 40.5 grain loads of IMR 4064 under Nosler 55 grain lead-free ballistic tips produce the best results. Velocities are roughly 300 FPS lower than test results on the Hogdon site but I loaded these at 2.65 (.06 shorter than Hogdon) and I'm using a shorter barrel (20 vs. 24). Next step is to play with the OAL a bit to see whether it makes any difference.
