Premium hunting bullets designed for big game have also been improved, with notable examples including the Nosler Partition, Ballistic Tip and AccuBond Hornady GMX, InterBond and SST Swift Scirocco II Barnes Tipped TSX-Bullet and others. Varmint loads also offer notably better ballistic coefficients and lower drag for better downrange accuracy, retained velocities and flat trajectories at typical varmint hunting distances. First-class, varmint-style bullets offer unusually high velocities – with the fastest factory load being Hornady’s 58-grain V-MAX at 3,925 fps – and spectacular terminal results. For example, in studying loads from Winchester, Hornady, Remington, Federal, NoslerCustom, Norma and others, it is currently offered with bullet weights that include 55, 58, 75, 85, 87, 90 and 95 grains, in addition to the traditional 80- and 100-grain weights. Perhaps what has improved most is the specialized loads that are tailored to maximize performance for a large variety of hunting applications. Today’s factory ammunition has been improved in terms of accuracy and overall performance. Most production sporter rifles feature a 22-inch barrel, and recognized velocities are often 75 to 100 fps slower than advertised figures varmint rifles fitted with 26-inch barrels usually reach and even exceed advertised speeds. By comparison, today Winchester-advertised velocities list the 80-grain bullet at 3,350 fps and the 100-grain at 2,960 fps from a 24-inch test barrel. Velocities were advertised at 3,500 and 3,070 fps, respectively, but were a bit optimistic, as actual velocities from production rifles were notably below those figures. 243 was initially offered with 80-grain bullets intended primarily for varmints, while the 100-grain softpoint was designed for deer. Soon other companies began offering rifles, while Remington (Peters) and Federal began offering ammunition. 243 Winchester was introduced in the Model 70 rifle. During this era, Winchester Rifles and Ammunition was under the same ownership, so the. Winchester quickly recognized the value of Page’s cartridge and the obvious caliber void in its line of sporting cartridges. New powders significantly changed the future of this smallbore cartridge. 308 Winchester case shortly after it was introduced in 1952. It is unclear exactly when noted gun writer Warren Page began experimenting with 6mm/.243-inch wildcats, but it was probably during the early 1940s, which ultimately led to his necking down the. 220 Swift that Winchester introduced in 1935.) (With small modifications, the 6mm Lee Navy was the parent case for the. Nonetheless, there was considerable experimental work by Winchester and the government as to barrel twist rates, velocities, bullet weights, profiles, etc. For example, barrel steels were not erosion resistant enough to offer a long life, and period smokeless powders could not take advantage of the high-velocity potential the small caliber offered, which resulted in excess barrel fouling that was reported to cause erratic pressures. Navy and Marines from 1895 through 1899 (with some sources indicating 1902), it was a cartridge that was ahead of its time, which largely doomed it. In spite of being tested extensively and even adopted by the U.S. 236 Navy, “Ball Cartridge, 6mm,” 6mm U.S.N.) as introduced by Winchester during 1894, and in 1895 in the Lee (straight pull) rifle that utilized. 243 Winchester probably begins with the 6mm Lee Navy cartridge (aka. 308 Winchester case (left).The history of the. 243 Winchester (right) is based on a necked-down.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |