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

243 Winchester Centerfire Rifle Cartridge:
 The popular .24" caliber, 243 Winchester, centerfire rifle cartridge is a commercial, rimless, bottleneck cartridge case design that is loaded commercially (factory produced ammunition) or reloaded by individual handloaders with various combinations of primer, powder and .243" diameter bullets. Handloaders can calculate the kinetic energies of their handloads with the use of these formulas.

243 Winchester Reloading Specifications:

Bullet Diameter - .243".
Primer Diameter - .210".
Primer Type - Boxer - Large Rifle.
Case Neck Diameter - .276".
Case Shoulder Diameter - .454".
Case Base Diameter - .471".
Case Rim Diameter - .473".
Minimum Case Length - 2.035" / Trimmed.
Maximum Case Length - 2.045" / Stretched.
Minimum Cartridge Overall Loaded Length - 2.540".
Maximum Cartridge Overall Loaded Length - 2.710".
Maximum Average Pressure - 60,000 Pounds Per Square Inch.

243 Winchester 100 Grain Bullet 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 100 Grain Bullet Load Data And Ballistics Table
Test Powder Used = Accurate Magpro.
Test Bullet Used = Sierra - Gameking - .243" diameter - 100 grain..
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.

243 Winchester 80 Grain Bullet Reloading Data:
 For the Bobcat & Coyote hunter hand-loading his or her own .243 Winchester ammunition wanting to shoot a slightly lighter bullet, Hodgdons Superformance rifle powder works very well with the 80 grain Sierra varminter .243" diameter bullets. Hodgdons online reloading data shows that the 80 grain Sierra bullet using 44 grains of Hodgdon Superformance powder can be driven to a velocity of 3,236 feet per second at a chamber pressure of only 49,300 PSI loaded at a maximum length of 2.635". This load does not top out until the Sierra 80 grain varminter bullet is above 3,450 feet per second in the .243 at a chamber pressure of 58,400 PSI and that is impressive for the .243 when used for predator hunting. For the 80 grain Sierra varminter bullet reload if you sighted your .243 Winchester predator rifle in dead on at 200 yards it would only be 1.1 inches high at 125 yards and only 2.1 inches low at 250 yards which would be an excellent predator load, this load still produces enough bullet energy at 500 yards to take predators with a remaining bullet energy of 733 foot pounds.

243 Winchester 80 Grain Bullet Load Data And Ballistics Table
Test Powder Used = Hodgdon Superformance.
Test Bullet Used = Sierra - Varminter - .243" diameter - 80 grain.
Test Primer Used = Winchester Large Rifle.
Test Case Used = Winchester - 243 Winchester.
Test Case Trimmed Length = 2.035".
Loaded Cartridge Overall Length = 2.635".
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.
80 .194 .319 44.0 3,236 48.7 3,460 58,400
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.
Predator 80 .319 3,460 2,126 0 - 1.8" - 4.2"
Long Range Ballistics Table For Above Load:
Bullet 100 yds. 200 yds. 300 yds. 400 yds. 500 yds. 600 yds. 700 yds.
Velocity Fps. 3,133 2,830 2,547 2,281 2,031 1,799 1,586
Energy Ft.lbs. 1,743 1,423 1,153 924 733 575 447
Trajectory + 0.9" 0 - 5.2" - 15.9" - 33.2" - 59.0" - 95.6"
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.


243 Winchester Reloading Supplies:
Reloading Kits On Sale
Reloading Presses, Kits and Equipment On Sale At:
(Amazon - Brownells - Cabela's - Sinclair - Sportsman's Warehouse)
.243" Diameter Rifle Bullets For Sale:
.243" Diameter Rifle Bullets, Barnes, Berger, Hornady, Lapua, Nosler, Sierra and Speer.
 Sponsor - Sinclair int.
243 Winchester Brass For Sale:
243 Winchester Brass, Federal, Hornady, Lapua, Norma, Nosler, Remington and Winchester.
 Sponsor - Sinclair int.
243 Winchester Reloading Dies For Sale:
243 Winchester Reloading Dies, Forster, Hornady, Lee, Lyman, RCBS, Redding and Wilson.
 Sponsor - Sinclair int.
Rifle Cartridge Reloading Powders For Sale:
Rifle Powders, Accurate, Alliant, Hodgdon, IMR, Ramshot, Vihtavuori and Winchester.
 Sponsor - Sinclair int.
Rifle Cartridge Reloading Primers For Sale:
Rifle Primers, CCI, Federal, Magtech, Remington,
Winchester and Wolf.
 Sponsor - Sinclair int.


243 Winchester / Reloading:

Cartridge & Pressure Information Sources:
 1. (SAAMI, Rifle Cartridge and Chamber Dimensions)
 2. (SAAMI, Rifle Cartridge, Velocity and Pressure)

Reloading Directory:
Bullets & Manuals
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