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240 Weatherby Magnum / History:
Centerfire Rifle Cartridges
Written by: Kim Lockhart, Copyright.

240 Weatherby Magnum:
 The 240 Weatherby Magnum was introduced in 1968 as the twelfth Weatherby cartridge in their belted long range rifle cartridges line-up. The 240 Weatherby cartridge case is unique in its design and is best described as a 30/06 cartridge case necked down to .243" caliber and a belt added to the case.

 The 240 Weatherby Magnum is one of the most powerful commercially available cartridges in .24" caliber, able to send 85 grain bullets down range at velocities of 3,500 fps. and 100 grain bullets in excess of 3,400 fps. which makes it a great dual purpose cartridge for varmint and deer with the ability to dispatch of either one out to 400 yards quite quickly.

 The 240 Weatherby Magnum is a moderate to heavy recoiling cartridge which is still comfortable enough for most anyone to shoot. For anyone who lives and hunt in areas where a good dual purpose, flat trajectory cartridge is needed the 240 Weatherby Magnum cartridge has a lot to offer with excellent ballistics.

 To achieve maximum accuracy from your 240 Weatherby Magnum rifle there are several things you need to do correctly that will help increase your rifles overall accuracy capabilities.
First: Properly mount your riflescope.
Second: Properly break-in your rifle barrel.
Third: Properly sight-in your rifle.
Fourth: Properly clean your rifles bore.
 To accurately calculate ballistics for your rifle with ballistics programs you need to measure your rifles scope mounted height.


240 Weatherby Magnum / Hunting Applications:

 These are down range trajectory charts for the 240 Weatherby Magnum 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:
240 Wby. Mag. rifle cartridge manufacturer: Weatherby.
Bullet weight: 87 Grains.
Bullet ballistic coefficient: .327.
Bullet muzzle velocity: 3,523 Feet Per Second.
Bullet muzzle energy: 2,398 Foot Pounds.
Bullet trajectory is set at 1 inch mid-range rise.
Rifle true zero is 205 Yards.
Maximum point blank range is 235 yards.
87 Grain Bullet
Down Range
At 100
Yards
At 200
Yards
At 300
Yards
At 400
Yards
At 500
Yards
Trajectory in Inches: + 0.9 + 0.1 - 4.8 - 14.8 - 31.0
Energy in Foot Pounds: 1,977 1,623 1,324 1,071 857
Predator Effectiveness: + + + + +
Good Deer Hunting Load:
240 Wby. Mag. rifle cartridge manufacturer: Weatherby.
Bullet weight: 100 Grains.
Bullet ballistic coefficient: .384.
Bullet muzzle velocity: 3,406 Feet Per Second.
Bullet muzzle energy: 2,576 Foot Pounds.
Bullet trajectory is set at 2 inch mid-range rise.
Rifle true zero is 245 Yards.
Maximum point blank range is 285 yards.
95 Grain Bullet
Down Range
At 100
Yards
At 200
Yards
At 300
Yards
At 400
Yards
At 500
Yards
Trajectory in Inches: + 1.6 + 1.4 - 3.0 - 12.3 - 27.7
Energy in Foot Pounds: 2,184 1,845 1,552 1,297 1,076
Deer Effectiveness + + + + -

240 Weatherby Magnum / Specifications:
Rifle:
Barrel Length - 26".
Bore Twist Rate - 1 in 10".
Bore Groove Diameter - .243".
Cartridge:
Bullet Diameter - .243".
Primer Size - Large Rifle.
Primer Type - Magnum.
Case Neck Diameter - .272".
Case Shoulder Diameter - .429".
Case Base Diameter - .453".
Case Rim Diameter - .472".
Trimmed Case Length - 2.490".
Maximum Case Length - 2.500".
Maximum Overall Length - 3.000".
240 Wby. Mag.
Rifle Cartridge
Manufacturer
Bullet
Weight
Grains
Bullet
Ballistic
Coefficient
Muzzle
Velocity
Fps.
Muzzle
Energy
Ft. lbs.
Recoil
Energy
Ft. lbs.
Weatherby 85 .382 3,500 2,312 11.60
Weatherby 87 .327 3,523 2,398 11.97
Weatherby 95 .379 3,420 2,467 12.76
Weatherby 100 .384 3,406 2,576 13.46

Rifle Ballistics:
.24" Caliber
243 Win.
6mm Rem.
243 WSSM
240 Wby. Mag.

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Rifle Cartridges And Reloading - Rifle Cartridges And Ballistics
Centerfire Rifle Cartridges:
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 Savage - 257 Roberts - 25 WSSM - 25-06 Rem.
257 Wby. Mag. - 6.5 x 55mm - 260 Rem.
6.5mm Rem. Mag. - 264 Win. Mag. - 6.8mm Rem.
270 Win. - 270 WSM - 270 Wby. Mag. - 7mm-08 Rem.
280 Rem. - 7mm Rem. Mag. - 7mm WSM
30-30 Win. - 308 Win. - 30-06 Springfield
300 Win. Mag. - 300 WSM - 300 Wby. Mag.
325 WSM - 338 Win. Mag. - 340 Wby. Mag.
357 Mag. - 44 Mag. - 444 Marlin - 45-70 Government