Most shooting errors are a result of poor to improper trigger management. Each shooter may experience slightly different errors, but they generally fall into three categories: placement, position or movement.
Most modern firearms — not 1911’s — use a trigger based on a lever design. Placing your finger lower on the trigger gives you more leverage. Leverage equals power.
Power makes it easier to move the trigger smoothly through all trigger movement stages. And it minimizes the “stall point” that can occur as you pull the trigger to its breaking point.
Trigger finger placement — which part of your finger you place on the trigger shoe — is critical to trigger management and, thus, accuracy.
Most shooters place too little of their finger on the trigger. Many position their finger on the trigger shoe so that it sits just before the first distal joint (a.k.a., crease). Placing your finger deeper on the trigger gives you access to more of the power mentioned above.
There’s a potential downside to this advice. Depending on the gun and your hand and finger size, your trigger finger may rub against the side of firearm’s frame. Applying pressure to the frame while pulling the trigger shifts the point of impact.
Position as much of your finger as you can without rubbing the side of the frame. Remember to place your finger on the trigger face. Riding the trigger’s edges may pull the shot one way or the other.
Modern striker fired pistols have three stages; slop, slack and squeeze. The slop is the free travel or take-up. Slack is the incremental movement up to the sear wall. The squeeze is breaking past the sear wall.
Most people think of trigger movement as a single motion. While that may be your goal, it’s best to start by mastering each individually. Slow the movement down and isolate each stage. Feel them real time. Practice them while minimizing sight disruption.
Proper trigger management enables peak accuracy. Everything else is semantics and subject to debate. Moving the trigger without disrupting the sights is not.