By comparison, they were “short action” magnums. 300/.375 H&H belted case, shortened to function in a standard length (3.340-inch) Each of the above cartridges is based on the. With a booming post-war economy, during the 1950s Winchester began developing new cartridges such as the. Like the H&H, the Weatherby cartridge required a long, 3.600-inch magnum action. During World War II, Roy Weatherby sought to improve its ballistics and blew the case out to significantly increase the powder capacity, which became the. and established a superb reputation as a general purpose big-game cartridge. 300 H&H became widely popular in the U.S.
As a result, its fame soared and within months Winchester announced the brand new Model 70 rifle along with that caliber as a standard offering and began producing ammunition domestically. shooters however, in 1935 Ben Comfort won the prestigious 1,000-yard Wimbledon Cup with a custom rifle so chambered. 300 H&H had an overall length of around 3.600 inches and could not be housed in most. 300 Winchester Magnum.ĭue to the long sloping case, the belt was necessary to provide positive headspace control. However, Winchester chose to move the shoulder forward and increase powder capacity.
338 Winchester Magnum case to create its. Nitrochemie Wimmis AG has no control over these processes and thus expressly refuses any liability for damage that may occur due to reloading or in the use of corresponding components and ammunition.Many people expected Winchester to neck down the. The equipment used must be in perfect working order. The reloading of ammunition entails components from other manufacturers. Smokeless propellant powders produce significantly greater pressures than black powder. Never use propellant powder in black powder firearms. Stop shooting your self-loaded cartridges immediately if you see signs of excessive pressure. High pressures can damage or destroy your weapon. Never exceed the maximum charge published by Nitrochemie Wimmis AG. The process should always begin with a starting charge and then develop in the direction of the maximum charge until the desired shooting result is attained. Never start with the specified maximum charge. In particular, mistakes in the powder type or double loads can result in severe problems.Īlways observe the following basic rules: Attention to details and careful, precise working help to increase safety. The manufacturer shall only be liable in the event of intent or gross negligence.Ĭartridge reloading should always be performed with the necessary respect for the explosive material. As the propellant powder is outside of our control and oversight once it leaves our factory, we refuse all liability for any damages that may result. Even in countries without such legal requirements, we recommend attending such a course. In some countries, formal training is required. Incorrectly reloaded cartridges can result in damage and personal injury. We know that the load data currently available on this page is incomplete, so we're working continuously to expand our database. LATEST UPDATE: 8 August 2022 / 727 load data online