That's fine, too. Power Pistol is a relatively fine grained powder that meters well, also. 231 will be closer to Bullseye in speed and performance. If you want to stick to spherical propellants for easy metering, others you might consider include Accurate No. 2, which is close to the 231/HP38 burn rate, and Accurate No. 5, which is closer to HS6. Likewise Ramshot Zip is with the fast ones, and True Blue is a little faster than HS6.
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