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243 Winchester / History:
Centerfire Rifle Cartridges
Written by: Kim Lockhart, Copyright.

243 Winchester:
 The popular 243 Winchester center-fire rifle cartridge originated as a wildcat based on the 308 Winchester brass necked down to accept .243" diameter bullets, Warren Page developed the first prototype of this cartridge. Warren Page, then shooting columnist for Field & Stream magazine, was an avid wildcatter as well, had convinced many American hunters through his writings that his .24" caliber wildcats would effectively harvest varmints and deer as a combination cartridge. Winchester agreed and this cartridge was made available to the public by Winchester Repeating Arms Company in 1955. Winchester chambered the new cartridge in their new Model 70 Featherweight bolt action rifle using a 22 inch, 1 in 10 inch twist barrel and offered 80 and 100 grain bullet ammunition loadings.

 The 243 Winchester 80 grain bullet loading was designed for varmint and predator hunting and the 100 grain bullet loading was designed for use as a thin skinned big game cartridge, today there are many various weight bullets offered in factory produced ammunition. Usually bullet weights less than 85 grain are better suited for use on varmints and predators such as coyotes, groundhogs, foxes, bobcats and prarie dogs. Bullet weights of 90 to 100 grain are better suited for use on wild pigs, wild boar, javelina, blacktail deer, whitetail deer, mule deer and black bear. The 243 Winchester is the first true dual purpose class of hunting rifle cartridges and it is now among the top five most popular and widely available of all centerfire rifle cartridges in the world today.

 Part of the extreme popularity of the 243 Winchester is the fact that a rifle chambered for this cartridge recoils very little to the shooters shoulder which adds to its over-all accuracy potential of which this cartridge is well known for. The greatest virtue of the 243 Winchester is that it offers a flat bullet trajectory for varmint hunting, predator hunting and has adequate killing power for thin skinned big game animals at a low recoil level that will help any hunter to shoot their rifle more accurately at greater distances.


243 Winchester / Hunting Applications:

243 Winchester vs. 260 Remington vs. 7mm-08 Remington vs. 308 Winchester.
25-06 Remington vs. 270 Winchester vs. 280 Remington vs. 30-06 Springfield.
264 Winchester Magnum vs. 7mm Remington Magnum vs. 300 Winchester Magnum.
 These are down range trajectory charts for the 243 Winchester cartridge with the scope mounted 1.8 inches above the bore center line plus if you were using these loads, their effective hunting bullet energy range with well placed shots on;
Predators: Such As, Bobcat, Cougar And Coyote.
Deer Size Game: Such As, Antelope, Blacktail Deer, Hogs, Javelina, Mule Deer And Whitetail Deer.
Good Predator Hunting Load:
243 Winchester rifle cartridge manufacturer: Hornady.
Bullet weight: 58 Grains.
Bullet ballistic coefficient: .250.
Bullet muzzle velocity: 3,925 Feet Per Second.
Bullet muzzle energy: 1,984 Foot Pounds.
Bullet trajectory is set at 1 inch mid-range rise.
Rifle true zero is 218 Yards.
Maximum point blank range is 248 yards.
58 Grain Bullet
Down Range
At 100
Yards
At 200
Yards
At 300
Yards
At 400
Yards
At 500
Yards
Trajectory in Inches: + 0.8 + 0.4 - 3.7 - 12.6 - 28.1
Energy in Foot Pounds: 1,546 1,199 921 697 519
Predator Effectiveness: + + + + +
Good Deer Hunting Reload:
243 Winchester rifle cartridge manufacturer: Handload.
Bullet weight: 100 Grains.
Bullet ballistic coefficient: .430.
Bullet muzzle velocity: 3,107 Feet Per Second.
Bullet muzzle energy: 2,143 Foot Pounds.
Bullet trajectory is set at 2 inch mid-range rise.
Rifle true zero is 230 Yards.
Maximum point blank range is 267 yards.
100 Grain Bullet
Down Range
At 100
Yards
At 200
Yards
At 300
Yards
At 400
Yards
At 500
Yards
Trajectory in Inches: + 1.8 + 1.1 - 4.4 - 15.7 - 33.8
Energy in Foot Pounds: 1,843 1,580 1,347 1,142 962
Deer Effectiveness + + + - -
Good Deer Hunting Load:
243 Winchester rifle cartridge manufacturer: Hornady.
Bullet weight: 95 Grains.
Bullet ballistic coefficient: .355.
Bullet muzzle velocity: 3,185 Feet Per Second.
Bullet muzzle energy: 2,139 Foot Pounds.
Bullet trajectory is set at 2 inch mid-range rise.
Rifle true zero is 230 Yards.
Maximum point blank range is 267 yards.
95 Grain Bullet
Down Range
At 100
Yards
At 200
Yards
At 300
Yards
At 400
Yards
At 500
Yards
Trajectory in Inches: + 1.7 + 1.1 - 4.4 - 16.1 - 35.1
Energy in Foot Pounds: 1,784 1,478 1,217 992 802
Deer Effectiveness + + + - -

243 Winchester / Specifications:
Rifle:
Barrel Length - 24".
Bore Twist Rate - 1 in 10".
Bore Groove Diameter - .243".
Cartridge:
Bullet Diameter - .243".
Primer Size - Large Rifle.
Primer Type - Standard.
Case Neck Diameter - .276".
Case Shoulder Diameter - .454".
Case Base Diameter - .471".
Case Rim Diameter - .473".
Trimmed Case Length - 2.035".
Maximum Case Length - 2.045".
Maximum Overall Length - 2.710".
Maximum Pressure - 60,000 Pounds Per Square Inch.
243 Winchester
Rifle Cartridge
Manufacturer
Bullet
Weight
Grains
Bullet
Ballistic
Coefficient
Muzzle
Velocity
Fps.
Muzzle
Energy
Ft. lbs.
Recoil
Energy
Ft. lbs.
Winchester 55 .276 3,910 1,867 6.43
Hornady 58 .250 3,925 1,824 6.82
Black Hills 62 .199 3,700 1,885 6.96
Federal 70 .309 3,450 1,850 7.44
Remington 75 .330 3,375 1,897 8.18
Winchester 80 .255 3,350 1,993 8.50
Federal 85 .391 3,200 1,933 8.85
Hornady 87 .400 2,800 1,514 7.85
Winchester 90 .354 3,100 1,920 9.11
Winchester 95 .411 3,100 2,027 9.88
Winchester 100 .372 2,960 1,945 10.13
243 Winchester - Reloading - Hunting & Ballistics - 50 Yard Sight-In.
.17 HM2, .17 HMR, .17 WSM, 5mm Rem. Mag., .22 BB Cap, .22 CB Cap, .22 Short, .22 Long, .22 LR, .22 WRF, .22 WMR.
17 Rem., 204 Ruger, 22 Hornet, 222 Rem., 223 Rem., 22-250 Rem., 220 Swift, 223 WSSM, 243 Win., 6mm Rem., 243 WSSM,
240 Wby. Mag., 250 Sav., 257 Roberts, 25 WSSM, 25-06 Rem., 257 Wby. Mag., 6.5 x 55mm Swedish Mauser, 260 Rem.,
6.5mm Rem. Mag., 264 Win. Mag., 6.8 Rem., 270 Win., 270 WSM, 270 Wby. Mag., 280 Rem., 7mm Rem. Mag., 7mm WSM,
30-30 Win., 308 Win., 30-06 Sprg., 300 Win. Mag., 300 WSM, 300 Wby. Mag., 325 WSM, 338 Win. Mag., 340 Wby. Mag.,
357 Mag., 44 Rem. Mag., 444 Marlin, 45-70 Government.