A narrow bowl finishes inside the route you wanted. One narrow delivery can happen to anyone; a run of them is useful feedback. Before changing your aim, work out whether the bowl left on the wrong line or curved differently because of its pace.
Watch the first metres
Ask a clubmate to watch from safely behind the mat while you deliver several bowls. Did each bowl leave on the intended line? If it did, the correction may be the aiming point or a changed green. If it left inside the line immediately, examine the step and release instead.
Keep weight stable while adjusting
For four bowls, choose the same jack length and draw weight. Move your visual aiming point a small amount wider, then note where each bowl finishes. If the bowls also vary widely in length, you have two variables moving at once; pause and restore a repeatable weight first.
Check both hands
Forehand and backhand may behave differently on the same rink because of bias, surface and wind. Test both rather than assuming one is automatically safer. The best hand is the one with a usable path and room for error around the current head.
Use a match-day cue
After a narrow miss, name one correction: “same weight, a little more line.” Avoid rebuilding your entire delivery with a bowl still to play. If the head has changed, ask the skip whether a narrower route is now blocked before repeating the shot.
Sources: Bowls Australia coaching activities, Bowls North West drills.
For a clearer look at a close club head, explore WGTS on iPhone or Android. Follow your competition's official measuring procedure for the result.