7mm Backcountry

7mm Backcountry
TypeRifle
Place of originUnited States
Production history
Designed2024
ManufacturerFederal Premium Ammunition
Produced2025–present
Specifications
Parent case.30-06 Springfield
Case typeRimless, bottleneck
Bullet diameter.284 in (7.224 mm)
Neck diameter.317 in (8.05 mm)
Shoulder diameter.4585 in (11.646 mm)
Base diameter.4698 in (11.93 mm)
Rim diameter.472 in (11.99 mm)
Rim thickness.049 in (1.24 mm)
Case length2.417 in (61.39 mm)
Overall length3.34 in (84.84 mm)
Rifling twist1 in 8 in (203.2 mm)
Maximum pressure80,000 psi (551 MPa)
Ballistic performance
Bullet mass/type Velocity Energy
155 gr (10 g) Terminal Ascent 3,300 ft/s (1,006 m/s) 3,748 ft⋅lbf (5,082 J)
195 gr (13 g) Berger 3,000 ft/s (914 m/s) 3,897 ft⋅lbf (5,284 J)
Test barrel length: 24 in
Source: Federal [1] SAAMI [2]

The 7mm Backcountry is a modern rifle cartridge developed to utilize a cartridge case of a proprietary steel alloy, which is able to withstand higher pressures than traditional brass alloys. The objective is to obtain higher muzzle velocities from short-barreled rifles, which are lighter and easier to carry than the long rifles traditionally used for shooting at extended range.[3] The cartridge is dimensionally similar to the .30-06 Springfield and its derivatives, particularly the .280 Remington and .280 Ackley Improved. Federal Premium Ammunition designed the cartridge to utilize long, heavy-for-caliber bullets due to their superior ballistic coefficients.[4]

Suitable firearms

Bolt thrust generated by a standard, .473 in (12.0 mm) diameter case head operating at 80,000 psi (550,000 kPa) is equivalent to a .532 in (13.51 mm) case head operating at 64,000 psi (441,000 kPa). Accordingly, any rifle action compatible with existing magnum cartridges, such as the .300 PRC, is also compatible with the 7mm Backcountry. Additionally, due to differences in the mechanics of shear transfer, the steel case of the 7mm Backcountry imparts less bolt thrust than an equivalent high-pressure brass case.[5]

Performance

Federal claims that the 7mm Backcountry is "the fastest 7mm [cartridge] on the market."[6] Early reports indicate that it approximates the performance of a 24-inch 7mm Remington Magnum with a 16-inch barrel.[7]

Cartridge Barrel Bullet Type Muzzle Velocity
.280 Remington 24-inches 175 gr Grand Slam 2,729 ft/s[8]
.280 Ackley Improved 24-inches 175 gr Sierra SBT 2,800 ft/s[9]
7mm PRC (Precision Rifle Cartridge) 24-inches 175 gr ELD-X 3,000 ft/s[10]
7mm Remington Magnum 24-inches 175 gr Grand Slam 2,954 ft/s[8]
7mm STW (Shooting Times Westerner) 24-inches 175 gr Grand Slam 3,009 ft/s[8]
7mm RUM (Remington Ultra Magnum) 24-inches 175 gr Grand Slam 3,106 ft/s[8]
7mm Backcountry 24-inches 175 gr Fusion Tipped 3,125 ft/s[6]
7mm Backcountry 20-inches 175 gr Fusion Tipped 2,975 ft/s[6]
7mm Backcountry 16-inches 175 gr Fusion Tipped 2,884 ft/s[7]

Handloading

According to early coverage by outdoor writer John Snow, the 7mm Backcountry uses propellant(s) presently unavailable for handloading,[11] though Federal has now published load data using Alliant, Hodgdon, Ramshot, and Vihtavuori smokeless powders.[12] These loads match the velocity claims of Federal’s factory ammunition when figures from equivalent barrel lengths are compared, and Federal describes the data as "...high-pressure loads for Peak Alloy cases only."[6][12]

To guard against corrosion, Federal does not recommend reloading cases with a zinc-nickel-plated exterior; for this purpose, nickel-plated cases are preferred.[13] Trimming, deburring, and some cleaning procedures commonly used in handloading brass cases may damage the nickel-plated steel case; and wax lubricants are recommended to minimize resizing effort. Lightly flaring the case mouth is advisable to avoid damaging the bullet during seating.[14]

Suppressors

The 7mm Backcountry produces relatively intense muzzle blast from short barrels, which encourages the use of suppressors. According to Federal engineers, "...despite the high pressures the round develops in the chamber, the pressure at the muzzle is no greater than a regular 7mm magnum round, like the 7mm PRC."[11] Accordingly, where laws permit, the same suppressors may be used.

Platforms

Manufacturer Model Type Country
Geissele King Hunter Bolt action rifle United States
Weatherby Model 307, Mark V Bolt action rifle United States

See also

References

  1. ^ [1]
  2. ^ [2]
  3. ^ Mann, Richard A. (January 7, 2025). "Federal's 7mm Backcountry: Life At 80,000 PSI". Gun Digest. Archived from the original on January 15, 2025. Retrieved 2 February 2025.
  4. ^ Zent, John (2025). "A Case for Strength". American Rifleman. 173 (2). National Rifle Association of America: 36–41.
  5. ^ Beckstrandt, Tom (September 2025). "Ultra Light & Ultra Fast". Guns & Ammo: 42.
  6. ^ a b c d "Backcountry | Federal Premium". www.federalpremium.com. Retrieved 2025-11-21.
  7. ^ a b Sillars, Jordan. "Is the 7mm Backcountry a Gimmick or a Game-Changer?". www.themeateater.com. Retrieved 2025-11-25.
  8. ^ a b c d "Rifle Data". www.speer.com. Retrieved 2025-11-25.
  9. ^ "Load Data". sierrabullets.com. Retrieved 2025-11-25.
  10. ^ "Load Data - Hornady Manufacturing, Inc". Hornady Manufacturing, Inc. Archived from the original on 2025-08-15. Retrieved 2025-11-25.
  11. ^ a b Snow, John B. (January 7, 2025). "Federal 7mm Backcountry, Tested and Reviewed". Outdoor Life. Archived from the original on January 7, 2025. Retrieved 2 February 2025.
  12. ^ a b "Load Data" (PDF). Federal Premium Ammunition. Retrieved 20 November 2025.
  13. ^ Spicer, Brent (2025-10-27). "Federal Releases 7mm Backcountry Reloading Data". The Truth About Guns. Retrieved 2025-11-21.
  14. ^ "Reloading Recommendations" (PDF). Federal Premium Ammunition. Retrieved 20 November 2025.


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