The .380 Long [9.8 x 24mmR], also known as the .380 Rook rifle, is an obsolete centerfire rifle cartridge.

The .380 Long is a straight rimmed cartridge originally designed for use in rook rifles for target shooting and hunting game up to the size of smaller deer.^[2]

In addition to British munitions makers, the .380 Long was also made by DWM in Germany and a number of cheap European pistols were chambered in it.^[1] This cartridge is very similar to the .38 Long Colt and may have inspired the latter cartridge's development.^[2]

As with other rook rifle cartridges, the .380 Long was superseded as a small game hunting and target cartridge by the .22 Long Rifle.^[3] As a pistol cartridge, the .380 Long gradually lost favour to more modern rounds such as the .38 S&W.^[2]

• 9 mm rifle cartridges
• List of rifle cartridges
• List of rimmed cartridges
• Rook rifle

• Barnes, Frank C., Cartridges of the World, 15th ed, Gun Digest Books, Iola, 2016, ISBN 978-1-4402-4642-5.
• Cartridgecollector, ".300 Rook target", cartridgecollector.net, retrieved 28 April 2017.
• Imperial War Museums, "9.8 x 24R; .380 Long Revolver CF & .380 Rook Rifle", iwm.org.uk, retrieved 28 April 2017.

• Ammo-One, ".380 Long rifle", ammo-one.com, retrieved 28 April 2017.
• Cartridgecollector, " 380 Long CF (Rifle)" ", cartridgecollector.net, retrieved 28 April 2017.
• The Spanish Association of Cartridge Collectors, ".380 Long revolver long CF", municion.org Archived 2017-04-29 at the Wayback Machine, retrieved 28 April 2017.