A flat average is a reason to inspect the record, not proof that a player has reached a universal 0.300–0.600 barrier or lacks automaticity.
Check the denominator
Record total points and total innings for comparable sessions. An illustrative 12 points in 40 innings and 18 in 60 both give 0.300, although their lengths differ. Do not average session averages without weighting innings. Keep set-shot attempts, open practice and competition in separate groups.
Find the first observable difference
For a selected miss, classify what can be seen: route unclear before the shot; first collision different from the plan; later cushion arrival different; moving-ball collision; or insufficient evidence. These are observation labels, not diagnoses. A single clip may fit several labels and a successful shot may still be unintended.
Test one explanation
For example, save one layout where the first cushion is missed. Record the intended first contact, use a fixed number of attempts chosen in advance and compare only one aiming change. Preserve the failures. If early contacts vary widely, a fixed late-rail correction may conceal the problem instead of explaining it.
Judge the next decision
Return to that layout later without reading the earlier solution, then try a nearby variation. Report what became more repeatable and what remains uncertain. A coach can inspect physical execution; 3Ball can compare model paths but cannot infer a psychological cause. No particular ratio, attempt count or session length guarantees a higher competitive average.