If you wish to stay under the 1600fps range, use powders commonly use in handguns (Herco, Unique, Red Dot, Green Dot, X700). Those velocities will range from about 1100 to 1600 fps. If the goal is to work up over the 1600fps range, use something more traditional like 3031. Velocities range from 1600 to 2000 fps.
Robert
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