Learn › Track 04 · Training & analysis

SCATT & electronic trainers

Your shot lands in the 10. The monitor shows a lovely number. Before you celebrate, ask yourself what that number actually knows.

Think first: A shot scores 10. Was it a good shot?

Yes. A 10 is a 10
Not necessarily. The score shows where the pellet landed, not what the sights and trigger did on the way there
Only if it was an inner ten

What a trainer sees

An electronic trainer, of which SCATT is the best-known make, puts a small optical sensor on the barrel or cylinder. The sensor tracks where the pistol points relative to an infrared target. A microphone hears the trigger break, which marks the moment of the shot. The system records the aim around 100 times a second and draws it as a line: the trace.

On SCATT-type software the trace changes colour by time:

Phase	SCATT colour	What it shows
Approach	green	The sights coming down into the aiming area
−1.0 to −0.2 s	yellow	The settled hold before the shot
Last 0.2 s	blue	The release itself
After the shot	red	Your follow-through

Trainers work in dry fire at home and in live fire on a range. Ranges depend on the model, from 2.5 m up to long range; the basic model works to 50 m.

Three numbers worth knowing

The software turns each trace into numbers. Three matter most for pistol.

10.0 is the share of the last second the sights spent inside the 10 ring.
10a0 is the same share, but measured around your own average aim point instead of the centre of the target.
S1 measures how far the sights travelled in the last second. Shorter means steadier.

Think first: Your sights are 10 mm off zero, so every shot lands right of where you aimed. Which number still tells you the truth about your hold?

10.0: time in the 10 ring
10a0: time in a 10-ring-sized circle around your own average aim
The score on the monitor

Check it below. Replay a shot, then flip the sight zero. 10.0 drops, 10a0 and S1 stay put. Switch to an elite hold and watch all three improve.

A study of SCATT-type data found 10a0 to be the most repeatable of the measures, varying by less than 1 % between repeat tests. That makes it a good number to track week to week.

The last 0.2 seconds

The blue part of the trace is short, but it decides a lot. Researchers who followed one elite pistol shooter over 360 shots found that how still the aim stayed in the last 0.2–0.25 seconds separated good shots from poor ones. Hold stability looked more like an entry ticket than the deciding factor.

A measure called DA is used to capture this. In one data set DA was higher on 8s than on 9s and 10s.

Sources describe DA differently. One defines it as movement in the last 0.2–0.25 s (how clean the trigger was). Another defines it as the distance from your average aim point to where the shot broke. Check which definition your software uses before comparing numbers. A "coordination" score mentioned in some places could not be confirmed.

Think first: Two shots have almost the same 10a0, but one scored 10 and the other 8. Where in the trace do you look first?

The green approach
The blue last 0.2 seconds
The red follow-through only

What to look for

Use the trainer to compare shots, not to admire single ones.

Approach: do the sights come into the aim area the same way every shot?
Yellow: does the hold settle, or is it still drifting when you start the final press?
Blue: is it a short, quiet line, or does it hook just before the shot?
Red: does the trace stay near the shot for a moment, or snap away? A quick snap can mean you relaxed too soon.
Patterns: compare your 10s with your 8s across a whole session, not one shot.

Read the claims carefully

Trainer makers say top athletes spend a large share of their training on their systems.

Think first: A trainer maker says top athletes spend 70–80 % of routine training on its system. How should you treat that figure?

As proof that you should do the same
As a vendor claim: plausible, but not an independent finding
As false

A score shows where the pellet went. A trace shows how it got there.
Trace colours: green approach, yellow −1 to −0.2 s, blue last 0.2 s, red follow-through.
10.0 is time in the 10 ring in the last second. 10a0 measures around your own average aim, so it ignores sight zero and is the most repeatable.
The last 0.2 seconds matter most for clean shots. Check what your software means by DA.
Treat vendor usage claims as marketing until someone independent measures them.

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