If you only want 9mm minor loads, i would go with w231 & faster powders. I shoot a lot of WST with 124gr & 147gr. Accurate enough for zero down hits @ 50yds. With plated, make sure you go 0.356", even try 0.357" for best accuracy. You are only looking for 1050fps or so with 124gr. With slower piwders, you never get to good combustion at that pressure/vel.

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NRA Cert. Inst. IDPA CSO