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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 ...
Improved military rifle propellants included a longitudinal perforation converting each grain to a tube with a progressive burning interior surface allowing a more consistent gas generation rate through the reaction period. Early propellants were identified by a two-digit number. As the number of experimental variations increased, each improved ...
Source (s): [2][3] Spitzer [2][4][3] The 8×58mmR Danish Krag, also known as the 8×58mmRD, is a late 19th-century rimmed centerfire military rifle cartridge similar to other early smokeless powder designs. It was briefly adopted by Norway and Sweden and remained the standard Danish service rifle cartridge from 1889 until 1945. [2][1][4]
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]
Remington submitted the specifications for the .223 Remington cartridge in 1964 to SAAMI. The original pressure for the .223 Remington was 52,000 psi with DuPont IMR Powder. A higher pressure of 55,000 psi (379 MPa) resulted from the change from IMR to Olin Ball powder. [ 8 ] The official name for .223 Remington in the US Army is cartridge 5 ...
The .30-06 Springfield cartridge (pronounced "thirty- aught -six" IPA [ˈθɝɾi ɔt sɪks]), 7.62×63mm in metric notation, and called the .30 Gov't '06 by Winchester, [5] was introduced to the United States Army in 1906 and later standardized; it remained in military use until the late 1970s.
Reloadable cartridge cases can be produced by reforming and trimming 8×56mmR Mannlicher or 7.62×54mmR Mosin–Nagant Russian brass. Standard .323" 8mm S-bullets are correct for this caliber though best results are obtained from open-base bullets that can expand to fit the .329" bore. RCBS offers both reforming and reloading dies.
The .257 Weatherby Magnum is a .257 caliber (6.53 mm) belted bottlenecked cartridge. It is one of the original standard length magnums developed by shortening the .375 H&H Magnum case to approx. 2.5 in (64 mm). Of the cartridges developed by Roy Weatherby, the .257 Weatherby Magnum was known to have been his favorite, and the cartridge ...