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No free man shall ever be de-barred the use of arms. The strongest reason for the people to retain their right to keep and bear arms is as a last resort to protect themselves against tyranny in government."

- Thomas Jefferson, of Virginia, Proposed Virginia Constitution, 1776

.243 Winchester

The .243 Winchester cartridge basically consists of a .308 Winchester cartridge necked down to accept a .244-inch (6mm) bullet. Renowned for accuracy, very flat trajectory, and relatively mild recoil compared to other deer cartridges, the .243 Winchester enjoys vast popularity world wide. The .243 Winchester cartridge quickly gained popularity after it’s introduction in 1955.  Most sportsmen consider the .243 Winchester the minimum cartridge for hunting deer is the most widely used cartridge in the UK.  In the U.S. the cartridge is used as a varmint cartridge as well.

.243 Winchester rifle cartridge.

.243 Winchester rifle cartridge.

P.O Ackley improve the cartridge with steeper shoulder that allows the case to hold about 10% more powder

A 55-grain bullet will travel at a muzzle velocity of approximately 4000 fps with a muzzle velocity of about 2000 ft-lbs.  A 100-grain bullet will travel at approximately 3,000 fps with almost 4,100 ft-lbs of energy at the muzzle.

The .243 Winchester produces a velocity of 2960 fps (902.21 m) with a 100-grain (6.8 gram) projectile from a 24-inch (610 mm) barrel. Commercially loaded .243 ammunition ranges in bullet weight from 55-grains (3.6 g) up to 105-grains (6.8 g), typical use being with bullets of c. 75–90-grains (6 g).

The .243 Winchester has gained very substantial popularity in the international hunting world. Commercially loaded ammunition is easy to find in almost any gunshop. Along with the .270 Winchester, the .308 Winchester and .30-06 Springfield, the .243 Winchestser is amongst the most popular and widely available of all centrefire cartridges. The .243 Winchester possesses the ability for success with all but the largest deer, small to medium sized antelope, and for varmint hunting.

In the United States, the cartridge is used extensively in varmint hunting as well as larger deer-sized game. It is also used with good effect in competitions out to 1,000 yards (914 m).

Type                            Hunting
Place of origin             USA

Production History

Designer                     Winchester
Manufacturer               Winchester
Produced                     1955
Variants                       .243 Winchester Improved (Ackley)


Parent case                   .308
Bullet diameter             .2435 in (6.18 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)
Rifling twist                   1-10
Primer type                     large rifle

Ballistic Performance

Bullet weight/type                Velocity(MV)                                      Energy(ME)
55 gr (3.6 g) BT             4,058 fps (1,237 mps)                         2,012 ft·lbf (2,728 J)
65 gr (4.2 g) BT             3,746 fps (1,142 mps)                         2,026 ft·lbf (2,747 J)
75 gr (4.9 g) HP             3,447 fps (1,051 mps)                         1,979 ft·lbf (2,683 J)
90 gr (5.8 g) SP              3,203 fps (976 mps)                            2,051 ft·lbf (2,781 J)
105 gr (6.8 g) BT            2,986 fps (910 mps)                           2,080 ft·lbf (2,820 J)

Source: Hodgdon


.243 Winchester next to the improved version by P.O. Ackley

The .243 Ackley improved version next to the .243 Winchester.

Banks shooting the .338 Winchester Magnum by Browning

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BB Gun Shooting and Hunting Blog

BB Gun Shooting and Hunting Blog Archive Page

I recently ordered a couple of new guns from my local gun shop. It may be a while until they come in, from what I am told. I ordered a 3 inch Ruger SP101 in the new .327 Federal Magnum caliber and a Ruger Hawkeye African in the .375 Ruger caliber. The seller tells me that the SP 101 in that make up is just now trickling out of the factory and that distributers are having a hard time stocking them for retailers, so I may be waiting a for more.