Stopping the gun and thus missing the shot sounds an easy problem to fix, but it takes practice, trust and training to let instinct take over
To think too much at the wrong moment and stop mid-swing or as you pull the trigger, may be noted as amongst the cardinal sins in shooting (breaches of safety apart). The Marquess of Ripon, arguably the greatest game shot of all (and a man who had despatched half-a million birds before he died in the heather shooting grouse in 1923), left this brief but sage shooting advice...