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Olin Corporation-Winchester Division, Case Nos. 03-1036-KI (lead case), 04-31-KI, 04-76-KI (D. Or. Nov. 2, 2005). Inventor John R. Jameson had developed and patented several designs for short magnum rifle cartridges. [citation needed] Jameson approached Olin/Winchester ammunition with his invention. The court found that Olin/Winchester and ...
With the advent of smokeless powder, which has a far greater energy density than black powder, it was possible to generate far more power in the large cases of the older black-powder cartridges such as the .32-40 Winchester and .38-55 Winchester. Some black powder cartridges such as the .32-20 Winchester and .44-40 Winchester were chambered in ...
Production of blasting powder for southern Illinois coal mining began in 1893. [4] Olin formed the Western Cartridge Company in 1898 to manufacture sporting rifle powder and shotgun shells for settlers of the Great Plains. The shotgun shells used primers manufactured by larger eastern ammunition firms. [4]
The principle at work in the short magnum cartridge is the fitting of larger volumes of powder in closer proximity to the primer's flash hole, resulting in more-uniform ignition. .300 WSM has a case capacity of 80 grains. The .30-06 Springfield holds 69 grains; .308 Winchester holds 56 grains; 30-30 Winchester holds 45 grains.
The .30-30 Winchester is typically limited to short ranges, primarily because of the relatively small case capacity and the 150-grain and 170-grain bullet weights. To compensate for this, Waters necked the cartridge down to use a 7 mm bullet (.284 inches), rather than the original .308 caliber (7.62 mm) bullet.
The high-velocity smokeless load was in a class with the .444 Marlin, [4] and its power exceeded the .348 [5] and .358 Winchester. [ 6 ] Winchester continued to offer the cartridge commercially until 1935 [ 1 ] and while it is still offered by some suppliers, due to its obsolescence and resultant obscurity, it is significantly more costly than ...
After many years of dwindling use it began enjoying a mild resurgence in popularity in the mid-2000s among long range rifle enthusiasts and reloaders due to the high ballistic coefficient of the heavier 6.5mm bullets and increasing popularity of cartridges such as 6.5mm Creedmoor, .260 Remington, 6.5 Grendel, benchrest and wildcat cartridges in ...
The early express cartridges used a heavy charge of black powder to propel a lightweight, often hollow point bullet, at high velocities to maximize point blank range. Later the express cartridges were loaded with nitrocellulose -based gunpowder , leading to the Nitro Express cartridges, the first of which was the .450 Nitro Express .