The .300 Remington Ultra Magnum (R.U.M.) is a true powerhouse in the hunting world, designed for long-range precision and maximum terminal performance on large game. Introduced by Remington in 1999, the .300 R.U.M. is based on a beltless, full-length magnum case, delivering higher velocities, flatter trajectories, and superior energy retention compared to other .30-caliber magnums like the .300 Winchester Magnum and .300 Weatherby Magnum.
With its bone-crushing energy and ability to take down elk, moose, and even large predators at extended distances, the .300 R.U.M. is a favorite among serious hunters. However, selecting the right ammunition is crucial to optimize performance based on your hunting environment and target species. Below, we’ve broken down some of the top-performing .300 R.U.M. cartridges, highlighting their strengths and best use cases.
Our Top Picks for Hunting with .300 R.U.M.
- Hornady Precision Hunter 300 RUM 220gr ELD-X - Best Overall for Hunting & Long-Distance Shooting
- Hornady Outfitter 300 Remington Ultra Mag 180gr CX - Best Lead-Free Hunting Round
- Remington Swift Scirocco Bonded 300 RUM 180gr - Most Versatile .300 R.U.M. for Big Game
- Barnes Vor-TX 300 RUM 165gr TTSX - Best .300 R.U.M. for Budget-Minded Hunters
Best Overall for Hunting & Long-Distance Shooting: Hornady Precision Hunter 300 RUM 220gr ELD-X
The Hornady Precision Hunter 220gr ELD-X is one of the best all-around choices for hunting with the .300 R.U.M. Engineered for long-range precision and devastating terminal ballistics, this round features Hornady’s Extremely Low Drag – Expanding (ELD-X) bullet, designed to retain energy and expand reliably at both short and extended ranges.
Hornady Precision Hunter 300 RUM 220gr Eld-X
Ballistic Data:
- Muzzle Velocity: ~2,850 fps
- Muzzle Energy: ~3,963 ft-lbs
- Ballistic Coefficient (G1): ~0.650
Pros:
- High ballistic coefficient for long-range accuracy
- Controlled expansion and deep penetration on large game
- Heat Shield tip prevents deformation for consistent flight
Cons:
- Higher recoil due to heavier bullet weight
- More expensive than standard hunting loads
Why We Selected This Product:
The 220gr ELD-X is a highly effective choice for elk, moose, and long-range shooting. It offers excellent accuracy, energy retention, and terminal expansion, making it ideal for hunters who want superior performance at extreme distances.
Best Lead-Free Hunting Round: Hornady Outfitter 300 Remington Ultra Mag 180gr CX
For those hunting in areas with lead-free restrictions, the Hornady Outfitter 180gr CX (Copper alloy eXpanding) is an exceptional choice. Designed for maximum weight retention and deep penetration, this monolithic copper bullet ensures ethical and effective kills on tough game like elk and bears.
Hornady Outfitter 300 Remington Ultra Mag 180gr CX
Ballistic Data:
- Muzzle Velocity: ~3,120 fps
- Muzzle Energy: ~3,892 ft-lbs
- Ballistic Coefficient (G1): ~0.520
Pros:
- 100% lead-free construction meets hunting regulations
- Deep penetration and high weight retention
- Nickel-plated cases for enhanced corrosion resistance
Cons:
- Slightly lower ballistic coefficient compared to bonded bullets
- More expensive due to premium copper material
Why We Selected This Product:
If you need a lead-free option for big game hunting in tough environments, the Hornady Outfitter 180gr CX is an outstanding performer that guarantees deep penetration and reliability in the field.
Most Versatile .300 R.U.M. for Big Game: Remington Swift Scirocco Bonded 300 RUM 180gr
The Remington Swift Scirocco Bonded 180gr is a fantastic all-around hunting round, designed to maximize performance at both short and long ranges. The bonded core design ensures high weight retention, while the polymer tip and boat-tail profile deliver excellent aerodynamics for long-range accuracy.
Remington Swift Scirocco Bonded 300 RUM 180gr
Ballistic Data:
- Muzzle Velocity: ~3,150 fps
- Muzzle Energy: ~3,967 ft-lbs
- Ballistic Coefficient (G1): ~0.520
Pros:
- Bonded bullet design prevents fragmentation
- Reliable expansion and deep penetration
- Flat-shooting trajectory for versatile hunting applications
Cons:
- More expensive than standard soft points
- May not expand as aggressively as some lead-core bullets at long distances
Why We Selected This Product:
For hunters who need a well-balanced round that performs across various hunting scenarios, the Swift Scirocco Bonded 180gr is an excellent choice. It delivers consistent results on everything from deer to moose, making it a top pick for versatility.
Best .300 R.U.M. for Budget-Minded Hunters: Barnes Vor-TX 300 RUM 165gr TTSX
If you’re looking for high performance at a lower cost, the Barnes Vor-TX 165gr TTSX offers solid accuracy and stopping power at a more affordable price point. Featuring Barnes’ Triple-Shock X (TTSX) bullet, this round is 100% copper, ensuring deep penetration and controlled expansion while meeting lead-free hunting regulations.
Barnes Vor-TX 300 RUM 165gr TTSX
Ballistic Data:
- Muzzle Velocity: ~3,250 fps
- Muzzle Energy: ~3,877 ft-lbs
- Ballistic Coefficient (G1): ~0.442
Pros:
- Lead-free and environmentally friendly
- Reliable expansion with deep penetration
- More affordable compared to bonded and match-grade rounds
Cons:
- Lighter bullet weight reduces penetration on very large game
- Lower BC compared to heavier long-range options
Why We Selected This Product:
The Barnes Vor-TX 165gr TTSX is a cost-effective, hard-hitting choice for hunters who want affordable, high-performance ammunition without compromising on terminal effectiveness.
Final Thoughts
The .300 Remington Ultra Magnum is one of the most powerful .30-caliber cartridges available, delivering devastating energy and long-range precision. Whether you're hunting elk, moose, or other big game, choosing the right ammunition is essential for success in the field.
- For the best all-around performance, go with the Hornady Precision Hunter 220gr ELD-X.
- For lead-free hunting, the Hornady Outfitter 180gr CX is a top choice..
- For versatility across different game species, choose the Remington Swift Scirocco Bonded 180gr.
For budget-conscious hunters, the Barnes Vor-TX 165gr TTSX delivers great value.
With the right ammunition, the .300 R.U.M. will deliver the power and precision you need for your next true big game hunt. Happy hunting!
Frequently Asked Questions
The .300 R.U.M. is effective beyond 1,000 yards for long-range shooting, but for ethical hunting, it is typically used within 600 yards, depending on bullet selection and shot placement.
While the .300 R.U.M. is capable of taking down deer, it is considered overkill for smaller game unless shooting at long distances where extra energy retention is needed.
The .300 R.U.M. has higher velocity, flatter trajectory, and more energy than the .300 Winchester Magnum, but it also has greater recoil and barrel wear.
The .300 R.U.M. is ideal for large game such as elk, moose, and bears, where deep penetration and high energy transfer are required.
The .300 R.U.M. has substantial recoil, comparable to a .338 Lapua Magnum, and is best suited for experienced shooters using a well-balanced rifle setup.
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