The .369 Nitro Express, also known as the .369 Purdey Nitro Express, is a centerfire, rifle cartridge developed by James Purdey & Sons and introduced in 1922.

The .369 Nitro Express is a rimmed cartridge originally designed for use in Purdey's own double rifles. The cartridge offers almost identical ballistic performance to the .375 H&H Flanged Magnum, firing a projectile of the same .375 in (9.5 mm) caliber.^[2]

As is common with cartridges for double rifles, due to the need to regulate the two barrels to the same point of aim, the .369 Nitro Express was offered in one loading, firing a 270 gr (17 g) projectile at 2,525 ft/s (770 m/s).^[1]

In his African Rifles and Cartridges, John "Pondoro" Taylor said of the .369 Nitro Express that you "would need to go a very long way to get a better general purpose weapon".^[3]

• List of rifle cartridges
• 9 mm rifle cartridges
• Nitro Express

• Barnes, Frank C., Cartridges of the World, Gun Digest Books, Iola, 2012, ISBN 978-1-4402-3059-2.
• Kynoch Ammunition, ".369 Purdey Nitro Express", kynochammunition.co.uk, Archived 2014-12-31 at the Wayback Machine 1 January 2015.
• Taylor, John, African rifles and cartridges, Sportsman's Vintage Press, 2013, ISBN 978-1-940001-01-2.

• Ammo-One, "369 Nitro Express (Purdey)", ammo-one.com, retrieved 30 April 2017.
• Cartridgecollector, ".369 Purdey", cartridgecollector.net, retrieved 12 February 2017.
• Municon, ".369 Purdey Nitro Express", municion.org Archived 2015-01-01 at the Wayback Machine, retrieved 1 January 2015.