. . 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. . Teach Safe Loading and Unloading. .