If you could only own one caliber for the rest of your life, there is a strong case that it should be the .22 Long Rifle. Introduced in 1887, the .22 LR has stayed popular for well over a century, and it is still the best-selling cartridge in the United States. The reason is simple: few rounds can match the versatility of the .22 LR. Whether you are a first-time shooter, a seasoned hunter, a competitive marksman, or someone who just enjoys an afternoon at the range, this humble rimfire has somet …