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243 Winchester / Reloading:
Written by: Kim Lockhart, Copyright.

243 Winchester 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".

243 Winchester 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 Table
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.


243 Winchester Load Data Sources:
Hodgdon Reloading Data Center: The reloading data information displayed on this site, including ballistic data, was derived from tightly controlled laboratory conditions, by ballisticians and expert handloaders. Lists pressure test results as well. Data for Hodgdon Rifle Powder, IMR Rifle Powder & Winchester Rifle Powder.

Accurate Reloading Data Center: The reloading data information displayed on this site, including ballistic data, was derived from tightly controlled laboratory conditions, by ballisticians and expert handloaders. Lists pressure test results as well. Accurate is an exclusive brand of Western Powders Incorporated.

Ramshot Reloading Data Center: The reloading data information displayed on this site, including ballistic data, was derived from tightly controlled laboratory conditions, by ballisticians and expert handloaders. Lists pressure test results as well. Ramshot is an exclusive brand of Western Powders Incorporated.

Barnes - 243 Winchester: Load data for the 243 Winchester featuring the use of Barnes bullets.

Nosler - 243 Winchester: Load data for the 243 Winchester using Nosler bullets. Features; varying case capacity and load density for each bullet weight and accuracy loads.

Norma - 243 Winchester: Load data for the 243 Winchester featuring the use of Norma rifle powders.

Vihtavuori - 243 Winchester: Load data for the 243 Winchester featuring the use of Vihtavuori rifle powders.

IMR - 243 Winchester: Load data for the 243 Winchester featuring the use of IMR rifle powders.


Reloading Data:
223 Remington
243 Winchester
25-06 Remington
270 Winchester
7mm Rem. Mag.
30-30 Winchester
308 Winchester
30-06 Springfield
300 Win. Mag.

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