.22-250 Remington

The .22-250 Remington is a .22 caliber rifle cartridge, primarily used for mid-long range varmint hunting. Some people even use it for deer hunting, although it is generally considered under powered for this task. It was designed in 1937 by necking down the .250-3000 Savage to accept a .224"-caliber bullet.

Cartridge Family
The .22-250 Remington is considered to be in the .30-06 Cartridge Family. It is a "grandson" of the .30-06 Springfield, as it is based off of the .250-3000 Savage, which is in turn, based off of the .30-06.

The .250-3000 Savage was a .30-06 necked down to hold .257-diameter bullet. The case-length was also shortened from 2.494" to 1.912". The .22-250 was just necked down from the .250-3000 to hold a .24" bullet, rather than a .257" one.