Best 17 WSM Ammo Best 17 HM2 Ammo Best 22 Short Ammo Best 17 HMR Ammo Best 22 WMR Ammo Best 22 LR Ammo Rimfire ammunition is divided into two categories: long rifles and shorts. Long rifle rimfire cartridges are typically .22 caliber, while shorts are .17 caliber. The difference between...