|Place of origin||United States|
|Bullet diameter||.251 in (6.4 mm)|
|Neck diameter||.276 in (7.0 mm)|
|Base diameter||.276 in (7.0 mm)|
|Rim diameter||.333 in (8.5 mm)|
|Case length||1.125 in (28.6 mm)|
|Overall length||1.395 in (35.4 mm)|
|Source(s): Barnes & Amber 1972|
Developed by J. Stevens Arms & Tool Company and Peters Cartridge Company, it was developed between 1898 and 1900; catalogs suggest it was introduced in 1898, but most sources agree on 1900. It was offered in the Crack Shot #15 rifle, which debuted in 1900. It may also have been available in the Favorite rifle, which was first released in 1894 and discontinued in 1935. It originally used a 10 to 11 gr (0.65 to 0.71 g) black powder charge under a 67 gr (4.3 g) slug; this was later replaced by smokeless.
In comparison to the .22 Long Rifle some sources note that its ballistics suffered from an excessively high trajectory for a rifle cartridge (a drop of 5.1 in (130 mm) at 100 yd (91 m)), while others praise its inherent accuracy, and larger versatility due to being much more powerful, especially when being used in revolvers.