A-Zoom .22 Rimfire dummies are widely used for hunter education and teaching safe firearms handling. Gunsmiths rely on them, too. When checking or adjusting the trigger pull use snap caps. 6 PK Rim fire Snap Caps Dry fire any .22 LR Rim fire firearm safely and without chamber damage. *Practice Loading and training *Ideal for Hunter Education These .22 Rim fire dummy rounds are ideal for gun testing and shooter training. Not snap caps, but rather precisely dimension, functional dummies; A-Zoom Training Rounds are CNC machined from solid aluminum and hard anodized.