What Do Your Numbers Say?

Ring Reader computes a whole set of metrics. This page explains which question each number answers — and which it doesn’t. Where the values live is covered in Viewing the Result and Statistics.

Ring score and Teiler: result and precision

The ring score answers the competition question: what counts on paper? The Teiler answers the precision question: how close was the shot really to the center? Two shots with the same 10.3 can have 5 or 25 Teiler — same score, very different precision. That’s why the Teiler average is worth a look when the ring score stagnates: it often moves earlier than the score does.

Group size and standard deviation: two views of consistency

• The group size is the smallest circle around all shot holes — intuitive, but sensitive: a single outlier makes it big.
• The standard deviation averages over all shots and is barely touched by a single outlier.

If the group size grows while the standard deviation stays stable, it was an outlier — find the shot in the shot list and think about what happened there. If both grow, the whole series is spreading.

MPI and corrected result: systematic or random?

The MPI (mean point of impact) shows where your series sits on average. If it repeatedly lands off-center — series after series in the same direction — that’s not chance but a systematic offset: a case for your sights. The corrected result (“Corrected: +X.X”) tells you what the same series would have been worth with a perfectly centered MPI — your potential from adjustment alone, without shooting any better.

If the MPI instead wanders from series to series, clicking won’t help — that’s spread, not offset.

Horizontal and vertical spread: the direction of the scatter

Spread split by axis tells you more than group size alone: clearly larger vertical spread often relates to breathing, rest or position height, dominant horizontal spread to trigger or alignment. Take the axis with the larger value as a hint where to look first in training — and check the shot pattern to see whether the picture matches.

Trends need time

A single series is daily form plus chance. The numbers become meaningful over weeks of history: the average over ten, twenty series, the direction of the trend line, the development of Teiler average and standard deviation. Compare like with like — same discipline, same position; the statistics filters help with that.

The right baseline: yourself

Other shooters’ absolute numbers are the wrong yardstick — discipline, class, supported or standing, everything shifts the scale. The reliable baseline is your own history: your average of the last months, your personal records, your streaks. Beating your own ten-series average — that’s progress, regardless of where that average sits.