Maybe "folow-through" depends on your context. When I took training at Front Sight, they used follow-through to mean: the after shooting drills of:
1) Rapid checking for additional threats,
2) Rechecking that your target hasn't gotten up or become a threat again, and
3) A thorough and careful checking for additional threats.
1) Rapid checking for additional threats,
2) Rechecking that your target hasn't gotten up or become a threat again, and
3) A thorough and careful checking for additional threats.