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. A-Zoom .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 A-Zoom 22 Training Rounds load in a magazine just like real ammo