Precisely dimensioned for function testing and shooter training. These .22 Rimfire dummy rounds are not snap caps, but rather precisely dimensioned, functional dummies; A-Zoom Training Rounds are CNC machined from solid aluminum and hard anodized. AZoom .22 Rimfire dummies are widely used for hunter education and teaching safe firearms handling. Gunsmiths rely on them, too. Training rounds are the same size as actual ammunition. Azoom 22 Training Rounds load in a magazine just like real ammo. Teach Safe Loading and Unloading