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1-d.gif - 1035 Bytes Reloading - Cartridges - Data -
243 Winchester - Ballistics - Hunting - Reloading.
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Ballistics:
 Barrel Twist Rates
 Barrel Break-In
 Rifle Scopes
 Rifle Scope Mounts
 Rifle Scope Mounting
 Rifle Scope Sight-In
 Precision Targets.
Reloading:
 Equipment
 How To
 Black Powder
 Recoil
Reloading Accuracy:
 Brass
 Primers
 Powder
 Bullets
 Load Testing
 Run-Out.
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243 Winchester, Reloading, Specifications And Data:
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 .243" caliber, 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 .243 caliber wildcats would effectively harvest varmints and deer as a combination cartridge. Winchester agreed and the 243 Winchester was made available as a factory cartridge to the public by Winchester Repeating Arms Company in 1955. Winchester chambered the 243 Winchester 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 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 center-fire rifle cartridges in the world.

 Part of the extreme popularity of the 243 Winchester is the fact that a rifle chambered in the 243 Winchester 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 more accurately at greater distances.

Reloading Specifications:
Bullet Diameter = .243".
Maximum Case Length = 2.045".
Trimmed Case Length = 2.035".
Primer Size = Large Rifle.
Maximum Cartridge Overall Length = 2.710".

Reloading Data:
 For the Antelope, Hog, Blacktail, Whitetail or Mule Deer hunter hand-loading or reloading his or her own 243 Winchester ammunition, Accurates Magpro rifle powder does an impressive job of launching 100 grain .243" diameter bullets at high velocity. Accurates online reloading data shows that a 100 grain .243 diameter Sierra Boat-Tail Gameking bullet using 45.2 grains of Magpro powder can be driven to a velocity of 2,861 feet per second, loaded at a maximum length of 2.650". This load does not top out until the 100 grain bullet is at 3,107 feet per second in the 243 Winchester at a chamber pressure of 59,880 PSI. For the 100 grain bullet reload if you sighted your 243 Winchester deer rifle in dead on at 225 yards it would only be 2 inches high at 150 yards and only 2.9 inches low at 275 yards which would be an excellent deer load, this load still produces enough bullet energy at 350 yards to take deer with 1,235 foot pounds.

243 Winchester Load Data And Ballistics
Test Powder Used = Accurate Magpro.
Test Bullet Used = Sierra - Gameking - .243" diameter.
Test Primer Used = Remington - 9 1/2 Large Rifle.
Test Case Used = Winchester - 243 Winchester.
Test Case Trimmed Length = 2.035".
Loaded Cartridge Overall Length = 2.650".
Test Barrel Length = 24".
Test Barrel Twist Rate = 1 in 10".
Sierra
Bullet
Weight
Grains
Sierra
Bullet
Sectional
Density
Sierra
Bullet
Ballistic
Coefficient
Powder
Start
Load
Grains
Start
Load
Velocity
Fps.
Powder
Maximum
Load
Grains
Maximum
Load
Velocity
Fps.
Maximum
Load
Pressure
P.S.I.
100 .242 .430 45.2 2,861 50.2 3,107 59,880
Short Range Ballistics Table For Above Load:
Recommended
Cartridge
Usage:
Bullet
Weight
Grains
Bullet
Ballistic
Coefficient
Muzzle
Velocity
Fps.
Muzzle
Energy
Ft. Lbs.
Rifle
Zero
100 Yds.
Bullet
Drop
200 Yds.
Bullet
Drop
250 Yds.
Deer 100 .430 3,107 2,143 0 - 2.7" - 5.8"
Long Range Ballistics Table For Above Load:
Bullet 100 yds. 200 yds. 300 yds. 400 yds. 500 yds. 600 yds. 700 yds.
Velocity Fps. 2,881 2,667 2,463 2,268 2,082 1,904 1,737
Energy Ft.lbs. 1,843 1,580 1,347 1,142 962 805 670
Trajectory + 1.4" 0 - 6.3" - 18.2" - 37.0" - 63.8" - 100.3"
Maximum Effective Range For Thin Skinned Big Game: 350 Yards.
Maximum Effective Range For Predators: 700+ Yards.



Rifles
Ammunition
Dies
Brass
Bullets.



243 Winchester Factory Ammunition Ballistics:
 The below ballistics table will give rifle cartridge bullet weight measured in grains, velocity measured in feet per second, energy measured in foot pounds, trajectory measured in inches and rifle recoil energy measured in foot pounds based on a fully loaded and scoped 8.5 pound, 24" barrel length rifle with scope mounted 1.5" above bore centerline.
Rifle Ballistics Table Compiled By: Kim Lockhart, Copyright.

Ammunition Manufactured By: (F) = Federal - (H) = Hornady - (R) = Remington - (W) = Winchester.
243 Winchester Ballistics
Ammunition Manufacturer
And
Centerfire Rifle Cartridge.
Bullet
Weight
Grains
Bullet
Ballistic
Coefficient
Muzzle
Velocity
Fps.
Muzzle
Energy
Ft. lbs.
Recoil
Energy
Ft. lbs.
Rifle
Zero
100 Yds.
Bullet
Drop
200 Yds.
Bullet
Drop
300 Yds.
Bullet
Drop
400 Yds.
Bullet
Drop
500 Yds.
(W) 243 Winchester 55 .276 3,910 1,867 6.43 0 - 1.4" - 6.3" - 15.9" - 31.2"
(H) 243 Winchester 58 .250 3,925 1,824 6.82 0 - 1.4" - 6.6" - 16.6" - 33.2"
(F) 243 Winchester 70 .309 3,450 1,850 7.44 0 - 2.1" - 8.7" - 20.7" - 39.8"
(R) 243 Winchester 75 .330 3,375 1,897 8.18 0 - 2.2" - 9.0" - 21.3" - 40.5"
(W) 243 Winchester 80 .255 3,350 1,993 8.50 0 - 2.5" - 10.2" - 24.8" - 48.6"
(F) 243 Winchester 85 .391 3,200 1,933 8.85 0 - 2.5" - 9.8" - 22.7" - 42.4"
(W) 243 Winchester 90 .354 3,100 1,920 9.11 0 - 2.9" - 11.0" - 25.6" - 48.0"
(W) 243 Winchester 95 .411 3,100 2,027 9.88 0 - 2.7" - 10.5" - 24.1" - 44.8"
(W) 243 Winchester 100 .372 2,960 1,945 10.13 0 - 3.3" - 12.2" - 28.1" - 52.5"

Current "2014"
Rifle Ammunition
Prices At:
Brownells
Cabelas
Sinclair
243 Winchester: Model 70, Rifles & Accuracy, Reloading, Rifles & Ballistics, Hornady, Winchester, Remington, Hunting & Ballistics, 1,000 Yards.