Current Rifle Cartridges
444 Marlin
The 444 Marlin was developed by Marlin and Remington Arms; Marlin
made the rifle and Remington produced the ammunition.
The cartridge was introduced in 1964 for the Marlin Model 336 level-action
rifle and is basically a lengthened 44 Magnum, which makes it a great rifle
cartridge with velocity up to app. 2,500 Feet per Second, and energy up to
over 3,000 Foot Pounds per Square inch.

Picture to the right for size comparison  (A.) 44 Magnum, (B.) 444 Marlin, (C.) 45-70