A Quickload run says IMR-4064 is too slow. You will run out of case capacity before you reach the round's potential. Hornady did not test IMR-4064 with 60 gr Vmax. Good suggestions in this thread. I use Ramshot TAC and Hodgdon CFE223 with good results. Hornady got their best velocities with CFE223 and BL-C(2). CCI 400 are fine. If you go with BL-C(2), you might try CCI 450.
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