.243 Winchester: Универсальный патрон для охоты и стрельбы.

Rifle cartridge

The .243 Winchester (6×52mm) is a popular sporting rifle cartridge. Developed as a versatile short action cartridge to hunt both medium game and small game alike, it "took whitetail hunting by storm" when introduced in 1955, and remains one of the most popular whitetail deer cartridges. It is also commonly used for harvesting blacktail deer, pronghorns and mule deer with heavier rounds, and is equally suited to varmint hunting with lighter rounds. The .243 is based on a necked down .308 Winchester, introduced only three years earlier. Expanding monolithic copper bullets of approximately 80 to 85 grains or traditional lead rounds of 90 to 105 grains with controlled expansion designs are best suited for hunting medium game, while lighter rounds are intended for varmints. In at least ten U. S. states and the United Kingdom, the .243 or similar cartridges are the smallest bore cartridges that are legal for hunting deer; this has been revised in the UK to allow Muntjac and Chinese Water Deer to be taken with .22 (5.56mm) chambered weapons. The cartridge can be extremely accurate to and beyond, but may not retain enough terminal energy to reliably drop medium game at that distance. Highly experienced hunters use the .243 Winchester to routinely drop bucks up to , Besides hunting applications, the cartridge is popular with target and metallic silhouette shooters for those same recoil and velocity properties, with superb accuracy. and Outdoor Life, and its widespread popularity (called the "whitetail hunter's favorite" by the Browning Arms Company and "American favorite" by American Rifleman

Well regarded Field and Stream editor and Harvard educated technical gun enthusiast Warren Page began experimenting with wildcatting a .243 caliber (6.2mm) round in the 1940s sometime after the 6mm Lee Navy was discontinued. When the .308 Winchester was introduced in 1952, Page started necking down the .308 design into a new .243 wildcat cartridge. It was a ground breaking development with at first only two factory loads, combining a versatile and effective combination of 80 grain bullets optimized for high velocity, long range performance for varmint hunters (e. g., groundhogs, coyotes, prairie dogs) and 100 grain bullets suitable for game up to the size of deer and pronghorn antelope. Its predecessor in the Winchester lineup, the very similar .257 Roberts, could have easily been selected to accomplish the same tasks, but was not available factory loaded with either lighter, varmint weight bullets or pointed, long range spitzer (pointed) bullets, so it never achieved the popularity of the newer round. Remington also saw the 6 mm (.243 in) family as suitable for this dual purpose use and introduced their version, the .244 Remington, in the same year (1955) based upon the .257 Roberts necked down to accept .243 bullets up to 90 grains in weight. The Winchester round remains available today whereas the .244 Remington, later renamed the 6mm Remington with the introduction of 100 grain bullets, is far less popular even though it can push all bullet weights slightly faster with maximum loads due to the larger capacity case. The fact that the .243 Win was originally offered in a 1 in 10 inch rifling twist rate, a rate better able to stabilize heavier, 100 and 105 grain bullets, versus the .244 Remington's 1 in 12 inch twist (hence the 90 grain factory offering) was also a factor in their popularity. Since the enactment of the Deer Act 1963 in the United Kingdom, which stipulates a minimum bullet diameter of .240 inches, together with minimum levels of muzzle velocity and bullet energy, the .243 has long been perceived as the entry level caliber for legal deer stalking. A specialist 115 grain projectile can move up to 3,150 fps from a 28 inch barrel, or over 3,000 fps from a 26 inch barrel. P. O. Ackley created an improved version of this cartridge called the .243 Winchester Improved (Ackley). Like other improved cartridges, this created a steeper shoulder and blew the sides out, giving about 10% more powder capacity, and some small improvement in velocity.

Performance wise, the .243 Winchester closely matches the 6mm Creedmoor but the .243 Win has more bullet and casing options, as well as more factory loadings and firearm options available. The .243 Win also has slightly more powder room, while the 6mm Creedmoor is usually loaded to slightly higher pressures. than that of the .30 30 Winchester cartridge introduced sixty years earlier, the .243 brought higher chamber pressures, larger powder volumes, and sharply tipped bullets, which all combine to lend the .243 more muzzle energy and far greater downrange energy than the .30 30 is able to achieve. Among popular small bore rifle ammunition the .243 does have approximately three times the recoil factor of the .223 Remington and twice the recoil factor of the .22 250 Remington, but only half the recoil factor of the more powerful long action .25 06 Remington (without muzzle brakes). the .243 has the lowest recoil factor among small bore deer hunting cartridges. Other variations of commercially loaded .243 ammunition are available with bullet weights ranging from 55 grains (3.6 g) up to 115 grains (6.8 g). Twist rate of the barrel can sometimes be a factor in deciding which bullets to use, 1:10 being the most popular as it is sufficient to stabilize up to 100 gr bullets. However, for very low drag profile or bullets heavier than 100 gr, a 1:8 or 1:7 (for 115 gr VLD bullets) is necessary.