SK 420248: .22 LR Semi-Auto Rifle 40gr Ammunition Brick of 500rds The SK Ammunition .22 LR Semi-Auto Rifle 40gr Ammunition Brick (500 rounds, 420248) is designed for reliable performance in semi-automatic rimfire rifles, including models such as the Ruger 10/22, AR-15s, and Remington 597. This SK 420248 ammunition features a 40-grain lead round nose (LRN) bullet and is optimized for smooth cycling and consistent accuracy. With a muzzle velocity of approximately 1,132 fps, it delivers 114 ft-lbs of energy, making it suitable for target shooting and training sessions. SK has introduced the SK Semi-Auto Rifle, a .22 LR ammunition designed to surpass and replace existing semi-auto options in the market. This SK Ammunition is engineered for superior performance and aims to elevate the standard for semi-auto rimfire rifles. Compatible with various firearms, including 10/22 style rifles, ARs, 597s, 64s, and more, it boasts pinpoint accuracy and flawless functionality. With an optimized velocity of 345 m/s (1132 fps) and clean-burning propellants, the SK Semi-Auto Rifle addresses common feed issues seen in inferior products. Ideal for competitive shooting disciplines, this ammunition is trusted by competitors for its match-grade precision and excellent price-quality ratio. SK Ammunition .22 LR Semi-Auto Rifle 40gr Ammunition Brick of 500rds 420248