One number per shooter. Updated after every match. Bigger gap, bigger swing.
| # | Shooter | Rating | ||||
|---|---|---|---|---|---|---|
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Documentation
Core Score is a single, portable skill rating built on top of the classic Elo system, tuned for shooting sports. Whether you shoot USPSA, IDPA, Steel Challenge, PRS, or 3-Gun, your results all feed into the same number.
Hit-factor (USPSA, IPSC), time-plus (IDPA, Steel), and points-down (Bullseye, F-Class) all get converted into a 0–100% finish relative to the match winner in your division. A 92% at a Steel Challenge match means the same thing as a 92% at a USPSA Level II.
Inside each division you're compared with every other shooter — not just the one above or below. Beating a much higher-rated shooter is worth a lot more than beating someone close to your rating.
Club matches move your rating a little (K = 16). Regional moves more (K = 24). National (K = 32) and International (K = 40) move the most. K is also divided by field size so a 300-shooter major doesn't swing your rating unfairly.
You get a separate Core Score per discipline (USPSA, IDPA, PRS, etc.). A steel match won't move your USPSA rating, and vice versa. The combined leaderboard shows your strongest discipline by default.
New shooters start at 1500. You're flagged as provisional until you've completed 5 rated matches — your rating moves more freely during this window so you reach your true level faster.
A DQ doesn't count as a 0% finish — it removes you from that match's rating run, the same way it removes you from official results. DNFs (did not finish) also skip the rating update.
| Match level | Examples | K-factor |
|---|---|---|
| Club | Weekly locals, monthly club matches | 16 |
| Regional | State championships, Level II | 24 |
| National | Nationals, Level III | 32 |
| International | World Shoot, Level IV+ | 40 |
Tiers are descriptive — they don't unlock anything. Your Core Score is just a number, but a useful one.