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I spent a bunch of time trying to optimize higher hit rates = higher bullet power. Several times at different points in Diamond's history, even. Even the most conservative of these always performed worse than my hand-tuned formulas. I presumed due to some combination of:

• It's advantageous to use a consistent bullet power for more accurate data classification.
• It's advantageous to prioritize survival at the expense of the bullet damage gained by more aggressive bullet powers.