7mm RUM Ballistic Data Guide: Velocity Charts, Trajectory & Load Comparisons

The 7mm Remington Ultra Magnum is the hardest-hitting factory 7mm cartridge ever produced. Based on the massive .404 Jeffery case necked down to .284 caliber, it pushes 140gr bullets past 3,400 fps and 175gr bullets past 3,000 fps — velocities that the standard 7mm Rem Mag can only dream about. If you need a 7mm cartridge that hits harder and shoots flatter than anything else on the shelf, the 7mm RUM delivers.

There’s a cost to that performance. Barrel life is measured in hundreds of rounds, not thousands. Recoil is substantial. Ammunition selection is limited. But for hunters who need maximum energy at extended range — think elk at 600 yards, moose across a canyon, or kudu on the African plains — the 7mm RUM remains one of the most capable cartridges available.

Looking for 7mm RUM ammunition? Browse our full 7mm RUM ammo selection at Tatted Tacticals.

1. What Is the 7mm RUM?

Remington introduced the 7mm Ultra Magnum in 2001 as part of their Ultra Magnum family. The cartridge uses the .404 Jeffery case — a massive, rebated-rim design — necked down to accept standard .284-caliber bullets. The result is a cartridge with roughly 25% more case capacity than the 7mm Remington Magnum and 15% more than the 7mm STW.

Key specifications:

• Parent case: .404 Jeffery (necked down)
• Bullet diameter: .284 inches (7.21mm)
• Case length: 2.850 inches (72.4mm)
• Overall length: 3.600 inches (91.4mm)
• Maximum pressure (SAAMI): 65,000 psi
• Typical barrel length: 26″
• Rifling twist: 1:9.25″

The 7mm RUM requires a magnum-length action due to its 3.600-inch overall length. This limits rifle options compared to standard long-action cartridges, but the extra case capacity is what drives the performance advantage. With 95+ grains of powder behind a .284-caliber bullet, the 7mm RUM generates velocities that overlap with some .30-caliber magnums while maintaining the superior ballistic coefficients of 7mm bullets.

The takeaway: The 7mm RUM is a specialized, high-performance cartridge. It trades barrel life and ammunition availability for raw velocity and energy. If you understand those trade-offs and need maximum 7mm performance, it delivers.

2. 7mm RUM Ballistic Data — 5 Factory Loads Compared

Factory ammunition options for the 7mm RUM are limited compared to the 7mm Rem Mag, but the loads available cover the essential bullet weights. All velocities are from a 26-inch test barrel.

The numbers speak for themselves. The 160gr AccuBond at 3,275 fps generates 3,810 ft-lbs of muzzle energy — that’s .300 Win Mag territory with a bullet that has a significantly higher ballistic coefficient. The 140gr Core-Lokt Ultra at 3,425 fps is blindingly fast and shoots almost as flat as a .220 Swift at moderate ranges.

The takeaway: The 7mm RUM generates 3,550 to 3,810 ft-lbs of muzzle energy depending on bullet weight. That’s 500–700 ft-lbs more than the 7mm Rem Mag with equivalent bullets, and it translates directly into flatter trajectory and more energy at distance.

3. Terminal Performance and Gel Test Data

The 7mm RUM’s extreme velocity creates unique terminal ballistic challenges. Bullets designed for 7mm Rem Mag velocities (2,800–3,100 fps) may come apart when driven 200–300 fps faster in the RUM. Bullet selection is critical.

Premium Bonded Bullets (AccuBond, A-Frame, Scirocco)

At 7mm RUM velocities, bonded bullets are essential for controlled expansion:

• Impact velocity at 100 yards (160gr AccuBond): ~3,050 fps
• Penetration depth: 22–26 inches in 10% ordnance gelatin
• Expanded diameter: .510″–.550″
• Weight retention: 70–80%

Standard Cup-and-Core Bullets (Core-Lokt, Interlock)

Non-bonded bullets at 7mm RUM velocities tend to fragment aggressively at close range:

• Impact velocity at 100 yards (140gr Core-Lokt): ~3,200 fps
• Penetration depth: 14–18 inches
• Expanded diameter: .580″+ (often with core-jacket separation)
• Weight retention: 45–60%

The Core-Lokt Ultra has improved bonding over the standard Core-Lokt, but at close range (under 150 yards), the extreme impact velocity can still cause significant fragmentation. For deer-sized game, that fragmentation is adequate. For elk or larger game, switch to a premium bonded or monolithic bullet.

Monolithic Bullets (Barnes TTSX, Hornady GMX)

Solid copper bullets handle 7mm RUM velocities better than any lead-core design:

• Penetration depth: 26–32 inches
• Expanded diameter: .500″–.540″
• Weight retention: 95–100%

If you handload for the 7mm RUM, a 140gr or 150gr Barnes TTSX driven to 3,350+ fps is one of the most effective hunting bullets you can assemble. The monolithic construction eliminates the over-expansion problem, and the extreme velocity ensures devastating energy transfer.

The takeaway: Bullet construction matters more in the 7mm RUM than in milder cartridges. Use bonded or monolithic bullets for game larger than deer. Standard cup-and-core bullets work for deer but may come apart on heavy bone at close range.

4. Bullet Drop Charts — 100 to 700 Yards

Trajectory data assumes a 200-yard zero, 26-inch barrel, and sea-level conditions. Drop values are in inches.

The 7mm RUM shoots extremely flat. With a 200-yard zero, the 150gr Scirocco drops only 5.9 inches at 300 yards — you can hold dead-on for a chest shot on deer out to 325 yards. At 500 yards, the drop is under 30 inches with the higher-BC loads, which is manageable with a standard hunting scope turret.

The takeaway: The 7mm RUM’s flat trajectory is its primary selling point for hunters. With a 200-yard zero, you have a point-blank range of roughly 300 yards on deer-sized game — no holdover required. Past 300 yards, dial your turret and the trajectory remains predictable.

5. Barrel Length and Velocity Considerations

The 7mm RUM’s large case capacity demands barrel length to burn its powder charge efficiently. Most factory rifles ship with 26-inch barrels, and shortening the barrel has a more dramatic effect than with smaller cartridges.

You lose approximately 35 fps per inch of barrel. Cutting from 26 to 24 inches costs 70 fps — at that point, you’re essentially shooting 7mm Rem Mag velocities and losing the RUM’s primary advantage. A 22-inch barrel bleeds 145 fps and defeats the purpose of choosing the cartridge in the first place.

Additionally, shorter barrels with the 7mm RUM produce significantly more muzzle blast and flash due to unburnt powder. If you’re considering a shorter barrel, the 7mm Rem Mag or 7mm PRC are better choices for that platform.

The takeaway: Keep the 7mm RUM in a 26-inch barrel. Shorter barrels erode the velocity advantage you chose this cartridge for, and the muzzle blast from unburnt powder makes the shooting experience unpleasant.

6. 7mm RUM vs 7mm Rem Mag — Is the Extra Powder Worth It?

The 7mm RUM is 325 fps faster and carries 420 ft-lbs more energy at 500 yards. That’s a real advantage — at 500 yards, the RUM hits with the same energy the 7mm Rem Mag delivers at 300. The trajectory gap is about 7 inches flatter at 500 yards.

The cost: 30% more recoil, one-third the barrel life, and significantly fewer ammunition options. The 7mm RUM also burns roughly 30% more powder per round, which means higher ammunition costs whether you’re buying factory or handloading.

The takeaway: The 7mm RUM is worth it for hunters who regularly shoot past 400 yards and need maximum energy at distance. For shots inside 400 yards — which covers 95% of hunting scenarios — the 7mm Rem Mag delivers similar results with far better barrel life and ammo availability.

7. 7mm RUM vs 300 RUM — Choosing Your Ultra Mag

The 7mm RUM actually shoots slightly flatter than the 300 RUM due to the higher BC of .284-caliber bullets at similar velocities. It also generates about 17% less recoil. The 300 RUM hits harder at the muzzle — 400 ft-lbs more energy — but by 500 yards the gap narrows as the 7mm’s better BC advantage compounds.

For elk and moose, both are more than adequate. The 7mm RUM is the better choice if you value flat trajectory and manageable recoil. The 300 RUM is better if you want maximum energy on impact for the largest game at any range.

The takeaway: The 7mm RUM shoots flatter and kicks less. The 300 RUM hits harder. For most North American big game, the 7mm RUM’s combination of trajectory and energy is the more practical choice.

8. 7mm RUM for Hunting — Effective Range by Game Size

The 7mm RUM carries 1,500 ft-lbs of energy past 700 yards with 160gr bullets. For elk hunters in the open western states — Montana, Wyoming, Colorado — where 400–600 yard shots are realistic possibilities, the 7mm RUM provides a genuine energy advantage over standard magnums.

For deer, the cartridge is overpowered at any reasonable range but shoots flat enough to make long shots simple. For bear, use 175gr A-Frame or monolithic bullets for maximum penetration through heavy bone.

The takeaway: The 7mm RUM extends ethical hunting range by 100–200 yards compared to the 7mm Rem Mag. If your hunting regularly involves shots past 400 yards on elk-sized game, that extra range is the reason this cartridge exists.

9. The Barrel Life Reality Check

This is the 7mm RUM’s most significant limitation. Barrel erosion from the large powder charge and high throat temperatures limits accurate barrel life to approximately 400–500 rounds. Here’s what that means in practical terms:

• Hunting-only use (50 rounds/year including sighting-in): 8–10 years of barrel life
• Moderate practice + hunting (150 rounds/year): 3 years of barrel life
• Active target shooting (300+ rounds/year): 1–1.5 years of barrel life

Barrel replacement on a bolt-action rifle costs $400–$800 depending on the barrel and gunsmith. For a hunter who fires 30–50 rounds per year, barrel life is a non-issue — you’ll get a decade of accurate shooting. For a target shooter or someone who enjoys range sessions, the 7mm Rem Mag or 7mm PRC are more economical choices.

Maximizing Barrel Life

• Let the barrel cool between shots. Never fire more than 3 rounds in quick succession. Heat is the primary driver of throat erosion.
• Clean regularly. Copper fouling accelerates erosion. Clean the bore every 20–30 rounds.
• Use moderate loads. If you handload, backing off 2–3% from maximum charges reduces throat erosion with minimal velocity loss.
• Break in the barrel properly. Fire one round, clean, repeat for the first 10 rounds. Then fire three, clean, repeat for the next 15 rounds.

The takeaway: Barrel life is the tax you pay for 7mm RUM performance. If you primarily hunt and shoot 50–100 rounds per year, it’s a minor concern. If you shoot more than that, factor in a barrel replacement every few years.

10. Frequently Asked Questions

Is the 7mm RUM discontinued?

The cartridge is not officially discontinued, but factory ammunition production has been sporadic. Remington — the primary manufacturer — has gone through bankruptcy and ownership changes that disrupted production. Nosler, Hornady (custom shop), and a few smaller manufacturers still produce 7mm RUM ammunition, but availability varies. Handloading is the most reliable way to keep a 7mm RUM fed.

What rifles are chambered in 7mm RUM?

The Remington Model 700 was the primary platform for the 7mm RUM. Other options include the Weatherby Mark V, Browning X-Bolt, and various custom rifle builders. New production rifles in 7mm RUM are increasingly rare as manufacturers shift toward the 7mm PRC and 28 Nosler.

Is the 7mm RUM better than the 28 Nosler?

The 28 Nosler delivers similar velocities (within 50 fps) in a shorter, more efficient case that fits standard long actions. The 28 Nosler also has better factory ammunition support from Nosler. For new rifle purchases, the 28 Nosler is the more practical choice. If you already own a 7mm RUM, there’s no ballistic reason to switch — the performance is virtually identical.

Can I use 7mm Rem Mag brass to form 7mm RUM cases?

No. The 7mm RUM uses a completely different case based on the .404 Jeffery, while the 7mm Rem Mag uses a belted magnum case. They cannot be converted. 7mm RUM brass is available from Remington, Nosler, and Peterson Cartridge Company.

How much does 7mm RUM ammo cost?

Factory ammunition typically runs $3.00–$5.00 per round for hunting loads, depending on availability. Premium options from Nosler Trophy Grade can exceed $5.00 per round. Handloading reduces cost to approximately $1.50–$2.00 per round, though the large powder charges (90+ grains) make it more expensive to reload than most cartridges.

Ready to load up? Shop 7mm RUM ammunition at Tatted Tacticals — we carry factory loads and components for the 7mm Remington Ultra Magnum.