Gunners Den

Straight Shooters

7mm rem mag

7mm Remington Magnum Reloading

By Leave a Comment

Cartridge:
The 7mm Remington Magnum centerfire rifle cartridge is a .28″ caliber, belted, bottleneck centerfire rifle cartridge case design that is reloadable with various combinations of primer, powder and .284″ diameter bullets by handloaders.

7mm Remington Magnum Reloading And Cartridge Specifications:
7mm Remington Magnum Cartridge:

Bullet Diameter – .284″.
Primer Diameter – .210″.
Primer Type – Large Rifle Magnum.
Case Neck Diameter – .315″.
Case Shoulder Diameter – .492″.
Case Base Diameter – .513″.
Case Rim Diameter – .532″.
Min. Case Length – 2.490″ / Trimmed.
Max. Case Length – 2.500″ / Stretched.
Min. Cartridge Loaded Length – 3.150″.
Max. Cartridge Loaded Length – 3.290″.
Max. Average Pressure – 61,000 PSI.
7mm Remington Magnum Reloading Data:
 For the Predator and Deer hunter hand-loading his or her own 7mm Remington Magnum ammunition wanting to shoot a lightweight bullet, the 7mm Remington Magnum will launch Nosler 120 grain Ballistic-Tip bullets in the excees of 3,300 feet per second. Those handloaders desiring a slightly heavier bullet, Hornady 139 grain bullets do a better job when dealing with stiff cross-winds as they have a slightly better ballistic profile.
7mm Remington Magnum Load Data:
Winchester Cartridge Case
Case Trimmed Length = 2.490″.
Nosler Bullet
Dia. Type Weight S.D. B.C.
.284″ B-Tip 120 .213 .417
Cartridge Overall Length = 3.200″.
Winchester Primer
Type = WLRM.
Accurate Magpro Powder
Powder
Start
Load
Grains		 Start
Load
Velocity
Fps.		 Powder
Maximum
Load
Grains		 Maximum
Load
Velocity
Fps.		 Maximum
Load
Pressure
P.S.I.
69.4 3,016 77.1 3,347 60,518
Ballistic Test Barrel Length = 24″.
Ballistic Test Barrel Twist Rate = 1 in 9″.

Bullet
@		 Velocity
/ FPS.		 Energy
/ FT.LBS.		 Trajectory
/ IN.
Muzzle 3,347 2,985 – 1.5
100 yds. 3,101 2,562 + 1.1
200 yds. 2,869 2,194 0
300 yds. 2,649 1,870 – 5.3
400 yds. 2,440 1,586 – 15.6
500 yds. 2,240 1,337 – 31.7
7mm Remington Magnum Load Data:
Winchester Cartridge Case
Case Trimmed Length = 2.490″.
Hornady Bullet
Dia. Type Weight S.D. B.C.
.284″ BTSP 139 .246 .453
Cartridge Overall Length = 3.230″.
Winchester Primer
Type = WLRM.
Accurate Magpro Powder
Powder
Start
Load
Grains		 Start
Load
Velocity
Fps.		 Powder
Maximum
Load
Grains		 Maximum
Load
Velocity
Fps.		 Maximum
Load
Pressure
P.S.I.
68.3 2,921 75.8 3,207 60,689
Ballistic Test Barrel Length = 24″.
Ballistic Test Barrel Twist Rate = 1 in 9″.

Bullet
@		 Velocity
/ FPS.		 Energy
/ FT.LBS.		 Trajectory
/ IN.
Muzzle 3,207 3,174 – 1.5
100 yds. 2,988 2,755 + 1.2
200 yds. 2,779 2,384 0
300 yds. 2,580 2,055 – 5.7
400 yds. 2,390 1,763 – 16.7
500 yds. 2,208 1,504 – 33.7
For the Elk and Moose hunter hand-loading or reloading his or her own 7mm Remington Magnum ammunition, bullet choices and selections are excellent for long range hunting. Berger 168 grain VLD bullets offer a very flat trajectory and very high energy retention for long range targets that may be encountered.
7mm Remington Magnum Load Data:
Winchester Cartridge Case
Case Trimmed Length = 2.490″.
Nosler Bullet
Dia. Type Weight S.D. B.C.
.284″ Accu-B 160 .283 .531
Cartridge Overall Length = 3.290″.
Winchester Primer
Type = WLRM.
Accurate Magpro Powder
Powder
Start
Load
Grains		 Start
Load
Velocity
Fps.		 Powder
Maximum
Load
Grains		 Maximum
Load
Velocity
Fps.		 Maximum
Load
Pressure
P.S.I.
63.9 2,662 71.0 2,958 60,446
Ballistic Test Barrel Length = 24″.
Ballistic Test Barrel Twist Rate = 1 in 9″.

Bullet
@		 Velocity
/ FPS.		 Energy
/ FT.LBS.		 Trajectory
/ IN.
Muzzle 2,958 3,108 – 1.5
100 yds. 2,781 2,747 + 1.5
200 yds. 2,610 2,421 0
300 yds. 2,446 2,126 – 6.6
400 yds. 2,288 1,860 – 19.0
500 yds. 2,136 1,621 – 38.1
7mm Remington Magnum Load Data:
Winchester Cartridge Case
Case Trimmed Length = 2.490″.
Berger Bullet
Dia. Type Weight S.D. B.C.
.284″ VLD 168 .309 .604
Cartridge Overall Length = 3.290″.
Winchester Primer
Type = WLRM.
Accurate Magpro Powder
Powder
Start
Load
Grains		 Start
Load
Velocity
Fps.		 Powder
Maximum
Load
Grains		 Maximum
Load
Velocity
Fps.		 Maximum
Load
Pressure
P.S.I.
63.2 2,741 70.2 3,001 60,920
Ballistic Test Barrel Length = 24″.
Ballistic Test Barrel Twist Rate = 1 in 9″.

Bullet
@		 Velocity
/ FPS.		 Energy
/ FT.LBS.		 Trajectory
/ IN.
Muzzle 3,001 3,359 – 1.5
100 yds. 2,843 3,015 + 1.4
200 yds. 2,691 2,701 0
300 yds. 2,544 2,414 – 6.2
400 yds. 2,402 2,151 – 17.8
500 yds. 2,264 1,911 – 35.4

7mm Remington Magnum Ballistics

By Leave a Comment

7mm remington magnum

7mm Remington Magnum:The 7mm Remington Magnum is a .28″ caliber, belted, bottleneck cartridge case design, centerfire rifle cartridge. The 7mm Remington Magnum cartridge casing is re-loadable after the cartridge has been fired or spent with various combinations of primer, powder and .284″ diameter bullets.

7mm Remington Magnum Cartridge:
Cartridge Type: Centerfire Rifle.
Bullet Diameter: .284″.
Primer Diameter: .210″.
Primer Type: Large Rifle Magnum.
Case Neck Diameter: .315″.
Case Shoulder Diameter: .492″.
Case Base Diameter: .513″.
Case Rim Diameter: .532″.
Min. Case Length: 2.490″ / Trimmed.
Max. Case Length: 2.500″ / Stretched.
Min. Cartridge Loaded Length: 3.150″.
Max. Cartridge Loaded Length: 3.290″.
Max. Average Pressure: 61,000 PSI.

7mm Remington Magnum Rifle:
Common Barrel Length: 24″.
Rifling Twist Rates: 1 in 9″ – 1 in 10″.
Bore Land Diameter: .277″ / 7.035mm.
Bore Groove Diameter: .284″ / 7.213mm.

7mm Remington Magnum Ammunition:
Ballistics Table, Test Rifle:
Weight – 8.5 Lbs.
Barrel Length – 24″.
7mm Rem. Mag.
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

7mm Remington Magnum History:

Remington introduced their new 7mm Remington Magnum cartridge to the public in 1962, this cartridge 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 America. 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 which easily stabilizes, very long, heavy-weight bullets.

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 terminal ballistic performance results with various rifling twist rates.

1 in 9″ Twist Rate: 160 – 175 grain bullets, minimum barrel length 26 inches for maximum performance and accuracy.
1 in 9.5″ Twist Rate: 140 – 160 grain bullets, minimum barrel length 24 inches for maximum performance and accuracy.
1 in 10″ Twist Rate: 115 – 140 grain bullets, minimum barrel length 24 inches for maximum performance and accuracy.

7mm Remington Magnum Uses:

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.

While much has been written about the 7mm Rem Mag cartridge it truly is a great hunting cartridge and is used as such worldwide. In North America 140 grain bullets are used quite successfully for harvesting all deer species, for the largest deer, such as moose, premium ammunition loaded with 160 grain bullets is a very good choice.

7mm Rem Mag Rifle:
Rifle barrel length: 24 Inches.
Rifle-scope mounted height: 1.8 inches.

7mm Remington Magnum Ammunition:
Cartridge manufacturer: Hornady.
Bullet diameter: .284 Inch.
Bullet weight: 139 Grains.
Bullet ballistic coefficient: .486.

7mm Remington Magnum Ballistics:
Rifle zeroed at 240 yards.
Maximum point blank range is 290 yards.
Bullet trajectory set at 2 inch mid-range rise.
Bullet
@		 Velocity
/ FPS.		 Energy
/ FT.LBS.		 Trajectory
/ IN.
Muzzle 3,240 3,239 – 1.8
100 yds. 3,033 2,840 + 1.7
200 yds. 2,837 2,484 + 1.3
300 yds. 2,649 2,166 – 3.3
400 yds. 2,469 1,881 – 13.0
500 yds. 2,295 1,626 – 28.3
Abbreviations:
/ FPS. = Feet Per Second.
/ FT.LBS. = Foot Pounds.
/ IN. = Inches.

7mm Rem Mag Rifle:
Rifle barrel length: 24 Inches.
Rifle-scope mounted height: 1.8 inches.

7mm Remington Magnum Ammunition:
Cartridge manufacturer: Hornady.
Bullet diameter: .284 Inch.
Bullet weight: 154 Grains.
Bullet ballistic coefficient: .525.

7mm Remington Magnum Ballistics:
Rifle zeroed at 267 yards.
Maximum point blank range is 312 yards.
Bullet trajectory set at 3 inch mid-range rise.
Bullet
@		 Velocity
/ FPS.		 Energy
/ FT.LBS.		 Trajectory
/ IN.
Muzzle 3,100 3,286 – 1.8
100 yds. 2,915 2,905 + 2.4
200 yds. 2,737 2,562 + 2.5
300 yds. 2,567 2,253 – 2.0
400 yds. 2,403 1,974 – 11.9
500 yds. 2,244 1,722 – 27.8
Abbreviations:
/ FPS. = Feet Per Second.
/ FT.LBS. = Foot Pounds.
/ IN. = Inches.

Check out our in depth rifle ballistics chart for more.