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To those without knowledge of guns and ammo, various talk about ".22" rounds can be confusing. Because, you see, it's not just the size of the bullet, but also the size of the casing that determines the range and power of a round.
All of the following use .22 caliber bullets, but there are huge differences in range and power, between them: the .22 Short (used in pocket pistols and mini-revolvers), the .22 LR (used in plinking rifles), and the .22 Magnum (a more powerful version of the .22 LR). Then there is the .223 Remington, a sporting rifle round with a bullet and casing of the same dimensions as a 5.56mm NATO, the round used in the M-16 assault rifle – and yet the former is less powerful than the latter. (BTW: Generally speaking, you can safely fire a .223 Remington round in a rifle designed for a 5.56mm NATO, but not vice versa.)
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