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I know that a hornet is .223, and .223 rem, 22-250, and so on are .224 but why the others?
GJ
.223 barrels for Hornets haven't been made for over 60 years.
Factory Hornet ammo is loaded with .224 bullets.
The others are names to separate them - the 218, 219, 220, 221, 222, 223, 224, and 225, all use .224 bullets.
The .227 is a true .227, and comes from the original 22 Savage Hi-Power, which was a light deer rifle that shot 70 grain bullets.
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