I've used Unique, W231, HS-6, Titegroup, Power Pistol, Accurate #7, and perhaps a few others in the 9mm. Unique, Power Pistol, HS-6, and #7 will give good case fill and essentially eliminate double charges. Power Pistol seems to produce more muzzle blast . W231 works well for practice/target loads, but double charges are possible. Titegroup has the lowest case fill of those listed. Unique throws like #8 shot through my powder measure.
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