Dry fire any .22 LR Rimfire firearm safely and without chamber damage. These .22 Rimfire dummy rounds are ideal for gun testing and shooter training. Not snap caps, but rather precisely dimensioned, functional dummies, A-Zoom Training Rounds are CNC machined from solid aluminum and hard anodized. 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 - Shop Pachmayr today.