Browning Arms Company is branching out from their fantastic line of guns to an excellent line of ammunition. The Browing Performance Rimfire products are specifically designed to get the most out of your favorite .22lr rifle. Loaded to exacting specifications for reliable ignition and feeding. The Browning Performance Rimfire .22lr 40gr round nose is great for volume shooting. The lead round nose projectile in the BPR .22lr allows for realiable feeding in semi auto firearms while helping keep cost lower than a copper plated alternative.with a muzzle velocity of 1255fps, the BPR .22lr 40gr LRN is capable of reliably cycling a semi auto rifle or handgun. Sold in 400rd boxes, they fit nicely in your range bag for a day of rimfire fun.