Atomic Ammunition's 223 Remington Subsonic is unlike any .223 Rem ammunition. It is quieter than most .22 Long Rifle ammo, has virtually no felt recoil, produces the same energy and power as most 380 ACP ammunition and delivers excellent accuracy out to 100 yards from rifles with barrel twist rates of 1 in 7''or faster. This ammunition is not specifically designed to cycle semi or fully automatic weapons.This specialty ammunition is perfect for new and smaller framed shooters who are learning to shoot their family's full size hunting rifles, seniors who have become recoil sensitive due to age, persons who only have access to indoor shooting ranges that do not allow high powered rifles because of the noise they generate that echoes off of the walls or fear that the bullet will generate so much power that it will pass through or tear up the backstop. It can be fired on smaller plots of land that are safe for firing handguns but where a miss with a rifle bullet would likely travel beyo...