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300 Winchester Magnum / Reloading / Hunting & Ballistics:
Written by: Kim Lockhart, Copyright.

300 Winchester Magnum Factory Ammunition Ballistics:
The below factory produced ammunition ballistics for the 300 Winchester Magnum were recorded from a 8.5 pound 300 Win. Mag. rifle with a 24 inch barrel.
300 Win. Mag.
Cartridge
Manufacturer
Bullet
Weight
Grains
Bullet
Ballistic
Coefficient
Muzzle
Velocity
Fps.
Muzzle
Energy
Ft. lbs.
Recoil
Energy
Ft. lbs.
Hornady 150 .415 3,400 3,850 29.22
Winchester 150 .469 3,260 3,540 27.85
Norma 155 .305 3,280 3,703 29.12
Hornady 165 .447 3,260 3,893 31.10
Cor-Bon 168 .404 3,125 3,643 30.22
Hornady 178 .495 2,960 3,463 30.35
Winchester 180 .527 3,000 3,597 31.24
Remington 190 .533 2,900 3,548 31.99
Hornady 195 .550 2,930 3,717 33.42
Nosler 200 .588 2,800 3,482 32.62

External Ballistics:
 External ballistics pertains to bullet velocity, energy and trajectory down-range. Bullet trajectory is the flight path of the bullet relative to some known and fixed points.

Bullet Trajectory And Sighting Plane:
 1. Point blank range when sighting in a rifle is the first point at which the line of sight intersects with the bullets path in the bullets trajectory.
 2. Mid-range rise when sighting in a rifle is the highest point in the bullets trajectory between the point blank range and true zero.
 3. True zero when sighting in a rifle is the second point at which the line of sight intersects with the bullets path in the bullets trajectory.
 4. Maximum point blank range when sighting in a rifle is the height of the mid-range rise and the bullet drop beyond true zero, both are equal in measure.

correct-trajectory-sight-plane
correct-trajectory-sight-plane-scope-view

300 Winchester Magnum Rifles:
 Common barrel lengths for the 300 Winchester Magnum are;
24" and 26", all of which will show a variance in the ballistics of the 300 Winchester Magnum.
 Variables such as riflescope choices, riflescope mounts and properly mounting your riflescope affect the line of sight above the bore centerline, which contribute to ballistic variances as well.
 To achieve maximum accuracy from your 300 Win. Mag. rifle for proper ballistic evaluation you need to, break-in your rifle barrel and then accurately sight-in your rifle.

Rifle Sight Height And Bullet Trajectory:
 To properly sight-in a hunting rifle a person needs to know a little bit about their scope mount height of their rifle as this affects the sight plane that intersects with the bullet's trajectory.
Rifle Sight Height to Bore Center Line:
Open Sights = 1 inch sight height.
Rifle Scope Center Line to Bore Center Line:
Standard 1 Inch Diameter Scope Tube.
Low Scope Mount And Rings = 1.5 inch sight height.
Medium Scope Mount And Rings = 1.8 inch sight height.
High Scope Mount And Rings = 2.0 inch sight height.

Rifle Barrel Length, Bullet Velocity And Energy:
 Bullet velocity readings are generally taken from a rifle barrel length of 24 inches and using the following formula the bullets energy is determined; velocity x velocity x bullet weight = _ divided by 450,340 = bullet kinetic energy in foot pounds. If your rifle barrel length is not 24 inches then you have to recalculate the bullet velocity and bullet energy, bullet velocity deviation by barrel length;
Rifle Barrel Length Shorter Than 24 Inch You Subtract Velocity.
Rifle Barrel Length Longer Than 24 Inch You Add Velocity.
2,500 to 3,000 feet per second advertised velocity, adjust at 20 feet per second per inch from standard of 24 inch rifle barrel.
3,000 to 3,500 feet per second advertised velocity, adjust at 30 feet per second per inch from standard of 24 inch rifle barrel.
3,500 to 4,000 feet per second advertised velocity, adjust at 40 feet per second per inch from standard of 24 inch rifle barrel.

Bullet Ballistic Coefficient:
 The bullet ballistic coefficient, higher B.C.s mean flatter trajectories and higher retained energy down-range on target. A ballistic coefficient is the measure of a bullet's relative ability to overcome air resistance. Each bullet is assigned a numerical value expressing this efficiency. Ballistic coefficient calculations combine both shape and sectional density factors.


300 Winchester Magnum External & Terminal Ballistics:

Bullet Energy (Terminal Ballistics):
 Before the bullet is down-range and on target, you have to know whether the bullet will have enough energy retention to cleanly harvest the animal. A bullet's kinetic energy is measured in foot pounds, and this is a proxy for what's generally termed stopping-power. The higher a bullet's energy at the point of impact, the greater its stopping-power.

Target Size (External Ballistics):
 Just as important is the size of target that a game animal that your hunting presents to you, typically standing broadside, exposing heart and lung area. Below are several hunting ballistics and sight-in charts for 300 Winchester Magnum ammunition that categorize this ammunition to its practical use on various game animals for hunting at various distances.

Moose Size Animals Include: Grizzly Bear, Brown Bear And Moose. These animals are quite large and offer about an eight inch target zone, for a correct rifle sight-in, a four inch mid-range is required for minimum bullet trajectory effect.
For this size animal, I prefer 2,000 foot pounds of bullet energy.

300 Winchester Magnum Hunting Ammunition:
Ammuntion: Hornady 300 Win. Mag. Superformace 180 Grain.
Bullet Diameter: .308 Inch.
Bullet Weight: 180 Grains.
Bullet Ballistic Coeffecient: .480.
Rifle Barrel Length: 24 Inches.
Rifle scope mounted 1.8 inches above bore center-line.
Rifle bullet trajectory set at 4 inch mid-range rise.
Rifle true zero at 297 Yards.
Maximum point blank range is 350 yards.
Note: (FPS. = Feet Per Second.) (IN. = Inches.) (FT. LBS. = Foot Pounds.)
Range
Muzzle
100 yds.
200 yds.
300 yds.
400 yds.
500 yds.
Bullet Velocity / FPS.:
3,130
2,927
2,732
2,546
2,366
2,195
Bullet Trajectory / IN.:
- 1.8"
+ 3.0"
+ 3.7"
- 0.2"
- 9.5"
- 25.0"
Bullet Energy / FT. LBS.:
3,917
3,424
2,983
2,589
2,238
1,925
Moose Size Animals:
+
+
+
+
+
+

Elk Size Animals Include: Caribou, Black Bear, Sheep And Elk. These animals can be quite large and offer about an six inch target zone, for a correct rifle sight-in, a three inch mid-range is required for minimum bullet trajectory effect.
For this size animal, I prefer 1,800 foot pounds of bullet energy.

300 Winchester Magnum Hunting Ammunition:
Ammuntion: Hornady 300 Win. Mag. Superformace 165 Grain.
Bullet Diameter: .308 Inch.
Bullet Weight: 165 Grains.
Bullet Ballistic Coeffecient: .447.
Rifle Barrel Length: 24 Inches.
Rifle scope mounted 1.8 inches above bore center-line.
Rifle bullet trajectory set at 3 inch mid-range rise.
Rifle true zero at 275 Yards.
Maximum point blank range is 315 yards.
Note: (FPS. = Feet Per Second.) (IN. = Inches.) (FT. LBS. = Foot Pounds.)
Range
Muzzle
100 yds.
200 yds.
300 yds.
400 yds.
500 yds.
Bullet Velocity / FPS.:
3,260
3,035
2,822
2,618
2,424
2,237
Bullet Trajectory / IN.:
- 1.8"
+ 2.3"
+ 2.6"
- 1.4"
- 10.6"
- 25.7"
Bullet Energy / FT. LBS.:
3,893
3,374
2,917
2,511
2,148
1,834
Elk Size Animals:
+
+
+
+
+
+

Deer Size Animals Include: Antelope, Blacktail Deer, Hogs, Javelina, Mule Deer And Whitetail Deer. These animals can be somewhat small at times and offer about an four inch target zone, for a correct rifle sight-in, a two inch mid-range is required for minimum bullet trajectory effect.
For this size animal, I prefer 1,200 foot pounds of bullet energy.

300 Winchester Magnum Hunting Ammunition:
Ammuntion: Hornady 300 Win. Mag. Superformace 150 Grain.
Bullet Diameter: .308 Inch.
Bullet Weight: 150 Grains.
Bullet Ballistic Coeffecient: .415.
Rifle Barrel Length: 24 Inches.
Rifle scope mounted 1.8 inches above bore center-line.
Rifle bullet trajectory set at 2 inch mid-range rise.
Rifle true zero at 247 Yards.
Maximum point blank range is 290 yards.
Note: (FPS. = Feet Per Second.) (IN. = Inches.) (FT. LBS. = Foot Pounds.)
Range
Muzzle
100 yds.
200 yds.
300 yds.
400 yds.
500 yds.
Bullet Velocity / FPS.:
3,400
3,150
2,914
2,691
2,479
2,276
Bullet Trajectory / IN.:
- 1.8"
+ 1.6"
+ 1.4"
- 2.8"
- 11.9"
- 26.6"
Bullet Energy / FT. LBS.:
3,850
3,304
2,829
2,412
2,046
1,725
Deer Size Animals:
+
+
+
+
+
+


300 Winchester Magnum / Reloading / Hunting & Ballistics:

Referenced Online Information Sources:
 1. (Black-Hills Ammunition)
 2. (Cor-Bon Ammunition)
 3. (Federal Rifle Ammunition)
 4. (Hornady Rifle Ammunition)
 5. (Norma Rifle Ammunition)
 6. (Nosler Ammunition)
 7. (Remington Rifle Ammunition)
 8. (Winchester Rifle Ammunition)
Hunting Ballistics
223 Rem.
243 Win.
25-06 Rem.
6.5 x 55mm
270 Win.
7mm Rem. Mag.
30-30 Win.
308 Win.
30-06 Sprg.
300 Win. Mag.

The Hunter's Guide To Ballistics:
Caldwell Stable Table
Caldwell Lead Sled Plus Recoil Reducing Rifle Rest
Caldwell Ultimate Target Stand With Target Backer

Rifles - Rifle Cartridges And Reloading - Rifle Cartridges And Ballistics