|Precisely dimensioned for function testing and shooter training. .177 HMR Rimfire dummy rounds are not snap caps, but are precisely dimensioned functional dummies. Training rounds are machined from solid aluminium and hard anodized. .177 Rimfire dummies are widely used for shooter education and teaching safe firearms handling. Ideal for gunsmiths too. Training rounds are the same size as actual ammunition. Load in a magazine just like real ammo. Teach safe loading and unloading without damage to rifle or compromise to safety. Pack contains 5 dummy rounds which are totally inert.