Ultimate Guide to 300 Remington Ultra Magnum (300 RUM) Ammo: Extreme Power for Long-Range Shooting
Introduction
The .300 Remington Ultra Magnum (300 RUM) is one of the most powerful .30-caliber cartridges available today. Designed for long-range hunting and precision shooting, the 300 RUM delivers high velocity, massive energy, and a flat trajectory, making it a top choice for big-game hunters and long-range marksmen.
Introduced by Remington in 1999, the 300 RUM was built to surpass the performance of other .30-caliber magnums, such as the .300 Winchester Magnum and the .300 Weatherby Magnum. With its beltless, high-capacity case, this cartridge provides exceptional ballistic performance at distances exceeding 1,000 yards.
Whether you're hunting elk, moose, or bear, or looking for a hard-hitting precision round, the .300 Remington Ultra Magnum is one of the most formidable cartridges on the market today.
Best .300 RUM We Sell At Pro Armory:
What is the 300 Remington Ultra Magnum?
The .300 Remington Ultra Magnum is a rimless, bottlenecked, centerfire rifle cartridge developed from the .404 Jeffery case. Unlike many other magnum cartridges, the 300 RUM is beltless, allowing for more consistent chambering and improved accuracy.
The 300 RUM is known for:
- Extreme Velocity: Capable of pushing a 180-grain bullet at over 3,300 fps, making it one of the fastest .30-caliber cartridges.
- High Energy Transfer: Generates over 4,500 ft-lbs of muzzle energy, ensuring deep penetration and excellent terminal performance.
- Flat Trajectory: Ideal for long-range shooting, minimizing bullet drop at extreme distances.
- High-Capacity Case: Holds more powder than other .30-caliber magnums, increasing velocity and ballistic performance.
Compared to other .30-caliber cartridges, the 300 RUM delivers higher velocities, greater energy, and flatter trajectories, making it a dominant choice for long-range applications.
Why the 300 RUM Stands Out
- Superior Ballistics – Higher velocity and energy than .300 Win Mag, .300 Wby Mag, and .30-06 Springfield.
- Ideal for Large Game – Provides deep penetration and high-impact energy, making it suitable for moose, elk, and bear hunting.
- Extended Range Accuracy – Stays supersonic beyond 1,500 yards, making it a top choice for long-range precision shooters.
- Versatile Bullet Selection – Can accommodate bullet weights from 150 to 230 grains, allowing shooters to optimize for hunting or target shooting.
Ballistic Performance of 300 RUM
The .300 Remington Ultra Magnum is one of the most ballistically superior .30-caliber cartridges available. Below is a comparison of the most popular bullet weights used in 300 RUM ammunition:
300 RUM Ballistics Chart
|
Bullet Weight (Grains)
|
Muzzle Velocity (fps)
|
Energy (ft-lbs)
|
500 Yards (fps)
|
1,000 Yards (fps)
|
1,500 Yards (fps)
|
|
150 gr. Barnes TTSX
|
3,500
|
4,000
|
2,650
|
2,050
|
1,500
|
|
180 gr. Hornady ELD-X
|
3,350
|
4,483
|
2,600
|
2,000
|
1,560
|
|
200 gr. Nosler AccuBond
|
3,100
|
4,260
|
2,450
|
1,900
|
1,500
|
|
220 gr. Sierra MatchKing
|
2,900
|
4,100
|
2,300
|
1,800
|
1,450
|
|
230 gr. Berger Hybrid
|
2,850
|
4,168
|
2,250
|
1,750
|
1,420
|
Key Takeaways
- Massive Muzzle Energy – Exceeds 4,000 ft-lbs, making it ideal for large game hunting.
- Flat Shooting Cartridge – Less bullet drop compared to other magnum calibers.
- Retains Energy at Distance – Maintains strong terminal ballistics at 1,500+ yards.
Best Bullets for 300 RUM and Their Applications
Choosing the right .300 RUM ammo depends on your intended use, whether it's hunting big game or long-range precision shooting.
|
Bullet Type
|
Features
|
Best For
|
|
Barnes TTSX
|
Lead-free, deep penetration
|
Hunting elk, moose, and bear
|
|
Hornady ELD-X
|
High-BC, Heat Shield tip
|
Long-range hunting
|
|
Nosler AccuBond
|
Bonded core, controlled expansion
|
Tough-skinned game
|
|
Sierra MatchKing
|
Precision bullet, high-BC
|
Long-range target shooting
|
|
Berger Hybrid OTM
|
Superior aerodynamic efficiency
|
Extreme-range precision
|
For hunting, bonded or controlled-expansion bullets like the Nosler AccuBond or Barnes TTSX provide maximum energy transfer and deep penetration. For long-range target shooting, Sierra MatchKing and Berger Hybrid bullets deliver excellent stability and accuracy.
Hunting Applications of 300 RUM
The .300 Remington Ultra Magnum is one of the best cartridges for hunting large and dangerous game. Its powerful ballistics make it a preferred choice for hunters pursuing moose, elk, and bear at extended distances.
Recommended Uses by Game Type
|
Game Type
|
Recommended Bullet Weight
|
Recommended Bullet Type
|
|
Whitetail Deer / Mule Deer
|
150 - 180 gr.
|
Hornady ELD-X, Nosler Ballistic Tip
|
|
Elk / Moose
|
180 - 220 gr.
|
Nosler AccuBond, Barnes TTSX
|
|
Black Bear / Grizzly
|
200 - 230 gr.
|
Swift A-Frame, Barnes TSX
|
|
Long-Range Precision Shooting
|
200 - 230 gr.
|
Sierra MatchKing, Berger Hybrid
|
- Effective at Extreme Ranges – Can take big game at 800+ yards.
- Superior Knockdown Power – Ensures clean, ethical kills.
Choosing the Right Rifle for 300 RUM
Due to the high pressures generated by the 300 RUM, selecting a strong, well-built rifle is essential.
Top Rifles for 300 Remington Ultra Magnum
- Remington Model 700 Long Range – Classic bolt-action rifle built for accuracy.
- Christensen Arms Mesa Long Range – Carbon-fiber barrel for reduced weight.
- Browning X-Bolt Pro Long Range – Precision rifle with a fluted barrel.
- Savage 110 Ultralite – Lightweight and accurate hunting rifle.
Reloading and Customization for 300 RUM
Many shooters prefer to reload their 300 RUM ammo to optimize ballistic performance.
- Popular Powders: H1000, Retumbo, RL-33 – Provide consistent burn rates.
- Bullet Selection: Lighter bullets (150-180 gr.) for hunting, heavier bullets (200-230 gr.) for long-range precision shooting.
- Custom Barrels: A fluted, match-grade barrel improves accuracy and heat dissipation.
Final Thoughts
The .300 Remington Ultra Magnum is one of the most powerful, long-range cartridges in the world. Whether you're hunting big game or competing in long-range precision shooting, the 300 RUM delivers exceptional ballistics, extreme energy, and flat trajectories.
- Best For: Big-game hunting, long-range shooting
- Bullet Weights: 150 - 230 grains
- Top Features: High velocity, deep penetration, long-range accuracy
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