Steel Targets # IMPORTANT # Enter ShootingTargets7 Into Amazon search bar for Our PRIME listings 3/16" AR400 targets easily withstand rounds up to 9mm and are the preferred choice for 22lr. These targets are designed to move and ring louder with these smaller rounds. 1/4" AR500 targets easily withstand pistol rounds up to 44MAG and are the preferred choice for pistols. These targets are designed to move and ring louder with pistol rounds. 3/8" AR500 targets easily withstand rifle rounds up to 7.62 and are the preferred choice for rifles. Ensure speed of bullet in below 2900fps at point of impact to avoid pitting. 1/2 AR500 targets easily withstand rifle rounds up to 338. 1/2 are the preferred thickness for rifles used in heavy Club use or Military / Police training. Ensure speed of bullet is below 2900fps at point of impact to avoid pitting.