> one study showed improved shot group tightness I refrained from mentioning caffeine's other reported and studied benefits, as my understanding is they mostly

> one study showed improved shot group tightness I refrained from mentioning caffeine's other reported and studied benefits, as my understanding is they mostly disappear when alertness is compensated for. Shot group tightness, memory performance, response time, critical thinking and many other performance criteria have studies indicating that caffeine improves results, but it's hard to separate the performance enhancement of just being more alert. Maybe people shoot more accurately or memorize cards better with caffeine, or maybe they just weren't quite paying attention when not using caffeine.