Some shooters prefer using a neck sizing die when ammunition is to be used in a single bolt-action or single-shot rifle. For example, standard full-length sizing dies are favored for general use in bolt-action rifles, especially if ammunition is to be used in multiple rifles. Die selection may be influenced by which rifle or ammunition will be used. 308 Winchester has been chambered in a variety of action types, including the previously mentioned bolt action, lever, pump, semiautomatic and single shots (typically in falling block persuasion). As a result, some cases will show signs of pressure earlier (usually sticking in the chamber) than cases that have a harder or tougher blend of metals. Case manufacturing methods and annealing processes will also affect how they perform. Brass recipes consist of a blend of copper and zinc but also contain varying amounts of lead, phosphorus, aluminum, magnesium, silicon, arsenic and other materials. This is mentioned to emphasize that not all cases are of the same strength. 308 Winchester cases as a component to handloaders.It seems important to mention that the empty case weight of more than 10 different brands varied by 28.1 grains, but again the water capacity variance was only 3.0 grains. It is best to obtain one lot number of cases to help eliminate that variable. It should be noted that with a 3.0-grain case capacity variance, not to mention case construction and material variances from one brand to the next, velocities and pressures will change accordingly. Loads fired with 168- to 200-grain bullets were done in conjunction with NoslerCustom cases. Hornady cases were used for developing all load data with bullets ranging in weight from 100 to 165 grains. Additional tests showed there were practically no ballistic or pressure changes when a given load was fired in each of these two cases. For the purposes of this article, Hornady Match and NoslerCustom cases were chosen that had a capacity of 55.9 and 56.0 grains, respectively. PMC cases held the least, at 53.1 grains, while Winchester held the most at 56.1 grains. 308 Winchester cases, variances were significant. In checking water capacity of many commercial. 308 Winchester, according to the Sporting Arms and Ammunition Manufacturers’ Institute (SAAMI), it can be used in sporting rifles chambered for. This would officially become the 7.62x51mm (aka 7.62 NATO) in 1954. 30-06, with development beginning shortly after World War II. 308 Winchester.magnums.įor the record, the T65 was an experimental military cartridge designed to replace the. The Barnes Tipped Triple Shock X-Bullet and Hornady GMX solid copper expanding hunting bullets are popular in the. But its “short-action” influence has inspired many additional cartridge designs, including the popular short 356 Winchester, both designed specifically for leverguns. 307 Winchester with that case necked up to accept. With a rim added and loaded with flatpoint bullets, it becomes the. 308 Winchester is the parent case for the. This broad selection of components required that the accompanying data be limited to the development of hunting ammunition. Thirty-caliber bullet selection is huge and includes versions designed for match target work, varmint and big-game hunting. Some of this is certainly due to the cartridge’s design and comparatively short powder column however, it is also due to the extensive selection of outstanding powders engineered specifically to give optimal performance in the. When developing the accompanying load data, shot strings often displayed extreme spreads that were below 20 fps, and many of the better loads were less than 10 fps. It offers unusually low extreme velocity spreads with any reasonable load. It has established an excellent reputation among match competitors and is often used in 1,000-yard competition. 308 Winchester is its outstanding accuracy. This level of performance was accomplished by carefully selecting the correct Ball powder and by bumping chamber pressures, listed today at 62,000 psi maximum, but was formerly 52,000 CUP using the old copper crusher pressure measurement method.Ī significant virtue of the. 30-06 load, which in practical terms is a negligible difference in the field. As listed in most current ballistic charts, the. 30-06), Winchester engineers specifically worked to develop loads that nearly duplicated the ever-popular 150-grain bullet in the. 30-06 (right) all started out as military cartridges and gained wide acceptance for civilian use.nearly 68.0 grains for the.
0 kommentar(er)
