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By 1936 improved DuPont process control produced batches conforming to published reloading data rather than requiring different charge specifications for each batch; [11] and those propellants have remained in production. Non-conforming batches were used to load commercial and military cartridges following traditional testing procedures.
An IMR smokeless powder for reloading The Hagley Museum in Wilmington, Delaware. IMR Legendary Powders is a line of smokeless powders which are popularly used in sporting and military/police firearm cartridges. The initials 'IMR' stand for Improved Military Rifle powder. IMR powders makes a line of various types of smokeless powder suitable for ...
The C was to indicate the powder burned "cooler" than traditional Improved Military Rifle (IMR) powders. [4] In 1949, he began acquisition of powder salvaged from disassembled Oerlikon 20mm cannon cartridges. This powder resembled IMR 4350 in appearance, and with a slower burning rate, was initially marketed as "4350 Data", and later as 4831. [5]
H335 was surplus Olin WC844 [11] for full-charge loads in the .223 Remington and .308 Winchester. [14] H380 was Olin WC852 [11] for full-charge loads in the .30-06 Springfield. [14] H414 was introduced in 1967 [1] for full-charge loads in the .270 Winchester and .30-06 Springfield [14] H450 was for large capacity and magnum rifle cartridges. [14]
Similar procedures were used for United States Army production at Picatinny Arsenal beginning in 1907 [7]: 297 and for manufacture of smaller grained Improved Military Rifle (IMR) powders after 1914. Short-fiber cotton linter was boiled in a solution of sodium hydroxide to remove vegetable waxes, and then dried before conversion to ...
The .338 Federal is a rifle cartridge based on the .308 Winchester case necked up to .33 caliber. It was created by Federal Cartridge and Sako in 2006 and intended as a big-game cartridge with reasonable recoil for lightweight rifles. [3].338 Federal can use SR-25 pattern magazines but requires to further modification [4]
The .308 Winchester has a 3.64 mL (56 gr H 2 O) cartridge case capacity. [9] The exterior shape of the case was designed to promote reliable case feeding and extraction in bolt-action rifles and machine guns alike, under extreme conditions. .308 Winchester maximum C.I.P. cartridge dimensions. All dimensions in millimeters (mm) and inches.
This 200-grain .338" projectile is able to impart significantly more energy than the 160 gr projectile used in the .308 Marlin Express, despite similar muzzle velocities. Furthermore, the projectile's high ballistic coefficient allows the .338 Marlin Express to maintain velocity to greater distances than big bore lever cartridges such as .45-70 ...