Federal Power-Shok .243 Winchester 80gr SP Ammunition /20

Federal Power-Shok .243 Winchester 80gr SP Ammunition /20

The traditional lead-core hunting bullets in Federal® Power•Shok® rifle loads provide solid accuracy and power at an affordable price. They feature reliable Federal brass, primers and powder and are suited to a wide variety of medium and big game.

Specifications
Caliber: 243 Winchester
Bullet: 80gr SP jacketed Soft Point
Rounds Per Box: 20
Ballistic Coefficient .365
Bullet Length In 0.858in. / 27.79mm
Reloadable: Yes
MPN: 243AS

Ballistic Information
-Muzzle Velocity: 3330 fps
-Muzzle Energy: 1970 ft/lbs

About the Manufacturer
Since 1922, Federal Premium Ammunition has been providing hunters and shooters with high-quality shotshell, centerfire and rimfire ammunition. At Federal Premium, we believe certain moments are worth a Premium. From our humble beginnings nestled among the lakes and woods of Minnesota, Federal Premium Ammunition has evolved into one of the world's major producers of sporting ammunition while partnering with the conservation organizations that protect and support our outdoor heritage.

About the 243 Winchester
This cartridge was first introduced in 1955 for the Winchester Model 70 bolt-action and Model 88 lever-action sporting rifles and quickly gained popularity among sportsmen worldwide. Just about every major manufacturer offers rifles chambered in .243.
It was a ground-breaking development of the day, combining a very useful combination of lightweight (70 to 85 grain) bullets optimized for long-range performance for varmint hunters (groundhogs, coyotes, prairie dogs) and 90 to 105-grain bullets suitable for the 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 6mm (.243") 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" rifling twist rate, a rate better able to stabilize heavier 100 and 105-grain bullets, versus the .244 Remington's 1 in 12" twist (hence the 90-grain factory offering) was also a factor in their popularity.

Specifications
Parent case .308 Winchester
Bullet diameter .243 in (6.2 mm)
Neck diameter .276 in (7.0 mm)
Shoulder diameter .454 in (11.5 mm)
Base diameter .471 in (12.0 mm)
Rim diameter .473 in (12.0 mm)
Case length 2.045 in (51.9 mm)
Overall length 2.7098 in (68.83 mm)
Case capacity 52 or 53[1] to 54.8gr H2O[2]
Rifling twist 1-10 to 1-8
Primer type Large Rifle
Maximum pressure (SAAMI) 60,000 psi (410 MPa)

Ballistic performance
Bullet mass/type Velocity Energy
55 gr (4 g) BT 4,058 ft/s (1,237 m/s) 2,012 ft·lbf (2,728 J)
65 gr (4 g) BT 3,746 ft/s (1,142 m/s) 2,026 ft·lbf (2,747 J)
75 gr (5 g) HP 3,447 ft/s (1,051 m/s) 1,979 ft·lbf (2,683 J)
90 gr (6 g) SP 3,203 ft/s (976 m/s) 2,051 ft·lbf (2,781 J)
105 gr (7 g) Amax BT 3,025 ft/s (922 m/s) 2,134 ft·lbf (2,893 J)