I'm guessing SD means standard deviation.
Could the plateaus be where the extra powder (and it's energy) are going into your brass instead of more velocity? As in the extra energy is stretching/deforming/working the brass more?
I'm guessing SD means standard deviation.
Could the plateaus be where the extra powder (and it's energy) are going into your brass instead of more velocity? As in the extra energy is stretching/deforming/working the brass more?
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