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7mm Remington Magnum / History:
Centerfire Rifle Cartridges
Written by: Kim Lockhart, Copyright.

7mm Remington Magnum:
 The 7mm Remington Magnum centerfire rifle cartridge is a .28" caliber, belted, bottle neck cartridge case design. This cartridge was developed by Remington over a period of time experimenting with several cartridge cases by necking them down to accept .284" diameter bullets, the final wildcat would be the 338 Win. Mag. case necked down to .28" caliber. Remington introduced their new 7mm Remington Magnum cartridge to the public in 1962, this cartidge received great reviews by many as the bullets that could be used carried a very high ballistic profile promising a flat trajectory for long range hunting use in North American hunting of big game. Remington chambered the 7mm Remington Magnum cartridge in their Model 700 bolt action rifle in 1962 and it featured a 1 in 9" rifling twist. The 7mm Remington Magnum has been chambered by most major high power rifle manufacturers for quite some time and they have offered these rifles with rifling twist rates from 1 in 9" - 1 in 10". Because of the velocity range and quirky nature of .284" diameter bullets in that velocity range, the 7mm Remington Magnum will give varied performance results with various rifling twist rates.

 The 7mm Remington Magnum has enough power, due in part to its large case capacity for powder, using 140 grain bullets it will drop deer at 500 yards, using 160 grain bullets it will take elk at 500 yards as well. This is truly an excellent big game cartridge for hunting all of North America's big-game animals. The 7mm Remington Magnum offers one of the best compromises of power, recoil and bullet selections of all high power class of rifles, it stands well when compared to other similar .28" caliber cartridges.

 The 7mm Remington Magnum when loaded with 139 grain bullets recoil is quite minimal and controllable when loaded with 160 grain bullets the recoil increases quite a bit, however a good recoil pad fitted to the rifle will tame the recoil before it gets to your shoulder.
 The other way to reduce recoil is to use Alliant 4000MR powder in heavy long distance bullet loads. Very high ballistic coefficient bullet profiles for long range hunting are .625 for the Hornady 162 grain A-Max and .652 for Nosler 168 grain long range Accubond.

 To achieve maximum accuracy from your 7mm Remington 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.


7mm Remington Magnum / 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 7mm Remington 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.
Elk Size Game: Such As, Caribou, Black Bear, Sheep And Elk.
Moose Size Game: Such As, Brown Bear And Moose.
Good Predator Hunting Load:
7mm Rem. Mag. rifle cartridge manufacturer: Norma.
Bullet weight: 125 Grains.
Bullet ballistic coefficient: .315.
Bullet muzzle velocity: 3,365 Feet Per Second.
Bullet muzzle energy: 3,143 Foot Pounds.
Bullet trajectory is set at 1 inch mid-range rise.
Rifle true zero is 195 Yards.
Maximum point blank range is 220 yards.
125 Grain Bullet
Down Range
At 100
Yards
At 200
Yards
At 300
Yards
At 400
Yards
At 500
Yards
Trajectory in Inches: + 0.9 - 0.2 - 5.9 - 17.4 - 36.1
Energy in Foot Pounds: 2,567 2,085 1,680 1,339 1,054
Predator Effectiveness: + + + + +
Good Deer Hunting Reload:
7mm Rem. Mag. rifle cartridge manufacturer: Handload.
Bullet weight: 139 Grains.
Bullet ballistic coefficient: .453.
Bullet muzzle velocity: 3,207 Feet Per Second.
Bullet muzzle energy: 3,174 Foot Pounds.
Bullet trajectory is set at 2 inch mid-range rise.
Rifle true zero is 238 Yards.
Maximum point blank range is 279 yards.
139 Grain Bullet
Down Range
At 100
Yards
At 200
Yards
At 300
Yards
At 400
Yards
At 500
Yards
Trajectory in Inches: + 1.7 + 1.3 - 3.6 - 13.7 - 30.0
Energy in Foot Pounds: 2,755 2,384 2,055 1,763 1,504
Deer Effectiveness + + + + +
Good Deer Hunting Load:
7mm Rem. Mag. rifle cartridge manufacturer: Hornady.
Bullet weight: 139 Grains.
Bullet ballistic coefficient: .486.
Bullet muzzle velocity: 3,240 Feet Per Second.
Bullet muzzle energy: 3,239 Foot Pounds.
Bullet trajectory is set at 2 inch mid-range rise.
Rifle true zero is 240 Yards.
Maximum point blank range is 290 yards.
139 Grain Bullet
Down Range
At 100
Yards
At 200
Yards
At 300
Yards
At 400
Yards
At 500
Yards
Trajectory in Inches: + 1.7 + 1.3 - 3.3 - 13.0 - 28.3
Energy in Foot Pounds: 2,840 2,484 2,166 1,881 1,626
Deer Effectiveness + + + + +
Good Elk Hunting Load:
7mm Rem. Mag. rifle cartridge manufacturer: Hornady.
Bullet weight: 154 Grains.
Bullet ballistic coefficient: .525.
Bullet muzzle velocity: 3,100 Feet Per Second.
Bullet muzzle energy: 3,286 Foot Pounds.
Bullet trajectory is set at 3 inch mid-range rise.
Rifle true zero is 267 Yards.
Maximum point blank range is 312 yards.
154 Grain Bullet
Down Range
At 100
Yards
At 200
Yards
At 300
Yards
At 400
Yards
At 500
Yards
Trajectory in Inches: + 2.4 + 2.5 - 2.0 - 11.9 - 27.8
Energy in Foot Pounds: 2,905 2,562 2,253 1,974 1,722
Elk Effectiveness: + + + + -
Good Moose and Large Bear Hunting Load:
7mm Rem. Mag. rifle cartridge manufacturer: Hornady.
Bullet weight: 162 Grains.
Bullet ballistic coefficient: .550.
Bullet muzzle velocity: 3,030 Feet Per Second.
Bullet muzzle energy: 3,302 Foot Pounds.
Bullet trajectory is set at 4 inch mid-range rise.
Rifle true zero is 292 Yards.
Maximum point blank range is 335 yards.
162 Grain Bullet
Down Range
At 100
Yards
At 200
Yards
At 300
Yards
At 400
Yards
At 500
Yards
Trajectory in Inches: + 3.1 + 3.7 - 0.5 - 10.2 - 26.0
Energy in Foot Pounds: 2,933 2,600 2,298 2,023 1,775
Moose Effectiveness: + + + + -

7mm Remington Magnum / Specifications:
Rifle:
Barrel Length - 24".
Bore Twist Rate - 1 in 9".
Bore Groove Diameter - .284".
Cartridge:
Bullet Diameter - .284".
Primer Size - Large Rifle.
Primer Type - Magnum.
Case Neck Diameter - .315".
Case Shoulder Diameter - .492".
Case Base Diameter - .513".
Case Rim Diameter - .532".
Trimmed Case Length - 2.490".
Maximum Case Length - 2.500".
Maximum Overall Length - 3.290".
Maximum Pressure - 61,000 Pounds Per Square Inch.
7mm Rem. Mag.
Rifle Cartridge
Manufacturer
Bullet
Weight
Grains
Bullet
Ballistic
Coefficient
Muzzle
Velocity
Fps.
Muzzle
Energy
Ft. lbs.
Recoil
Energy
Ft. lbs.
Norma 125 .315 3,365 3,143 19.92
Hornady 139 .486 3,240 3,239 21.57
Remington 140 .486 3,175 3,134 21.24
Norma 150 .536 3,166 3,388 22.99
Hornady 154 .525 3,100 3,286 23.13
Norma 156 .330 2,953 3,020 22.16
Winchester 160 .512 2,950 3,092 22.82
Hornady 162 .550 3,030 3,302 23.93
Federal 165 .458 2,950 3,188 23.69
Nosler 168 .652 2,880 3,094 23.51
Norma 170 .378 2,953 3,292 24.60
Remington 175 .427 2,860 3,178 24.51

Rifle Ballistics:
.28" Caliber
7mm-08 Rem.
280 Rem.
7mm Rem. Mag.
7mm WSM

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