In 2025, Federal Ammunition introduced its new 7 mm Backcountry cartridge, which operates at higher pressures than any previous commercial ammunition offering. At the heart of this new chambering is an entirely new cartridge-case design, the Peak Alloy case, which allows Federal to go beyond the traditional operating pressures of brass cartridge cases and offer more performance out of today's rifle platforms. Watch our "American Rifleman Television" feature above to see the story of the 7 mm Backcountry and the Peak Alloy case.
"So Peak Alloy is a brand-new invention for us. It's a complete paradigm shift in how ammunition is loaded and shot today," said Bryan Peterson, senior director of new product development, Federal Ammunition. "So, for over 100 years, we've been using brass-cased ammunition. I think everybody's familiar with brass.We set out to really raise the bar and performance on ammunition. And really the best way to get there is to increase pressure. And in order to increase pressure, we needed to have a brand-new case material, something that could withstand this higher pressure. So that's what Peak Alloy came to do."
Unlike brass cartridge cases, the Peak Alloy case design is constructed using a specially high-strength steel alloy similar to that used in nuclear reactors and safes. The steel is stronger than brass while still remaining ductile enough to provide a gas seal when cartridges are fired, and the added strength of the case aids in handling the increased pressure of the 7 mm Backcountry, which uses an operating pressure of 80,000 psi.
"Well, Peak Alloy is really the technology, it's the case technology for our new 7 mm Backcountry cartridge that breaks the barriers, that sets the boundaries," said Mike Holm, director of centerfire rifle ammunition, Federal Ammunition. "[The] brass case has been around for a long, long time, and there's just certain barriers that you can't go past, especially when it comes to pressure. And the Peak Alloy case technology allows us to break that barrier, elevate pressures and thus elevate performance of cartridges."
For Federal, the development of the 7 mm Backcountry came after eight years of product development, and the spark that set company designers, engineers and product managers down the road was a growing need within the American hunting community.
"We're always looking to solve a market need, something that is out there that doesn't readily have an answer. And what we ran into was consumers looking for having the best performance out of short-barreled rifles," Holm said. "They want to use their suppressors and not have a barrel that's, you know, way too long. They want to be compact with their rifles, maneuverable in and out of vehicles, ATVs, UTVs, box blinds, climbing the mountain. They just want this lightweight, compact, short-barreled rifle that they can put their suppressor on and not lose performance."
As a result, due to the increased pressure of the 7 mm Backcountry, users can expect to see 3,000 fps of muzzle velocity out of 20-inch barrels, ensuring that performance isn't sacrificed with shorter barrel lengths and also enabling the use of suppressors. Federal notes that testing with pressure transducers at the muzzle end shows the muzzle pressure of the 7 mm Backcountry to be similar to that of other cartridges, ensuring there is no increased pressure or wear for suppressors.
"As I look back at all the end users, like military end users, all the demonstrations we've taken in, it's been just exciting to see the response and the excitement for what this technology brings to the table," Peterson said. "Enabling warfighters to do more with their weapon systems, enabling hunters to shoot further, you know, cleanly harvest game at better distances or using shorter weapon systems, even for women or kids or youth shooters. There's just so much that this technology offers that I am particularly excited about."
Federal offers its 7 mm Backcountry cartridge in two of its popular product lines, Terminal Ascent and Fusion Tipped. The Terminal Ascent loads feature a match-grade, bonded bullet weighing either 155 or 170 grains. There's also a 168-grain Barnes LRX offering in the Terminal Ascent line, as well as a 195-grain Berger Elite Hunter option. Federal's 7 mm Backcountry Fusion Tipped offering includes a 175-grain bullet with a factory-recorded muzzle velocity of 3,125 fps.
"One of the great successes of this product launch, and one of the things that we're all very proud of, is that we made sure to engage with a multitude of different rifle manufacturers," said Jason Nash, vice president of marketing, Federal Ammunition. "Because we know, as ammo, as an ammo company that specializes in ammo, without guns out in the market, cartridges aren't going to work well, they're not going to be adopted. So we made sure that we had, I think, 84 different offerings of rifles out in the marketplace when we launched this product, and we continue to work with anyone who has an interest in loading this cartridge."
To watch complete segments of past episodes of American Rifleman TV, go to americanrifleman.org/videos/artv. For all-new episodes of ARTV, tune in Wednesday nights to Outdoor Channel 8:30 p.m. and 11:30 p.m. EST.
