For those interested I have a 24" barrel and used two different powders.
CFE223 30.3gr - 2516 Avg FPS w STDev 14.87 FPS
- dirty powder, smaller granules so easier to fill case but annoying to get an accurate grain weight with tweezers
IMR4166 25.5gr - 2273 Avg FPS w STDev 14.90 FPS
- slow, accurate, clean powder, large granules so easier to get an accurate grain weight with tweezers
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