- Can I shoot my rimfire .17 HMR on this target?: While the .17 HMR is a rimfire round, its velocity may be too great for the reactive mechanisms of the target. This target is designed for .22 rimfire ammunition only. Can I shoot centerfire handgun rounds on this target?: While this target is made of 1/4" AR500 armor steel which can withstand the force of a centerfire handgun round, shooting it with more powerful rounds will cause it to wear out quickly and cause the reactive features of the target to malfunction. Is the entire target made of armor steel?: The reactive Spinning Jack (painted blue) is made of AR500 armor steel. The stand is made of mild steel, but is designed to effectively shed bullets.