Plenty of armies use the 22 LR for training purposes, including Canada. No, it's not the weapon of choice for combat or self defense. The 5.56 isn't either. When I enlisted I was used to shooting hunting rifles. When I qualified with the 5.56 I thanked the lord it was peace time. I sure wouldn't want to face some guy who thinks dying is going to get him 21 virgins with a glorified 22 wmr. Weird things happen when someone is shot with any weapon. A plain clothes officers shot one of the North Hollywood bank robbers with a .380 in the shoulder. The FBI report concluded that if he had shot the robber with a FMJ instead of a HP he would have died. Every weapon has it's drawbacks, even the heavy hitters. Sometimes to get the job done it takes multiple shots with any gun. If you want to use extreme examples some people survived the bombing of Hiroshima.