.280 Riml. N.E. Ross Load Data & Reloading Guide
Also known as: .280 Rimless N.E. Ross, 7mm Rimless N.E. Ross
About .280 Riml. N.E. Ross
The .280 Riml. N.E. Ross originated in the early 20th century, developed to provide a powerful yet manageable cartridge for sporting rifles. Named after the Canadian firearms designer Neils Eckhardt Ross, the caliber was envisioned as an alternative to the then-prevalent .303 British, aiming to deliver improved accuracy and performance for hunting purposes. Initially used in bolt-action rifles, the .280 Riml. gained popularity among hunters and marksmen alike due to its versatility and effectiveness in various shooting environments.
Key technical characteristics of the .280 Riml. include a case length of approximately 56mm and a bullet diameter of .284 inches. Designed to operate at moderate pressures, the cartridge typically features a capacity suitable for a range of bullet types. With a standard velocity around 2,600 feet per second, it delivers commendable energy on target, making it suitable for game hunting of medium to large species.
Typical bullet weights for the .280 Riml. range from 140 to 180 grains, allowing reloaders to fine-tune their loads for specific applications. The cartridge demonstrates a flat trajectory and good terminal performance, making it an excellent choice for both hunting and competitive shooting. Its ability to accommodate various bullet profiles aids in customizing loads to suit individual shooting preferences.
For reloaders, the .280 Riml. N.E. Ross offers specific advantages, including a relatively generous case capacity which can be optimized for performance. This ability to fine-tune powder types and charge weights allows reloaders to maximize precision and efficiency in their loads. Additionally, the caliber is less commonly produced than mainstream options, making handloading a more appealing choice for enthusiasts seeking customized ammunition solutions.
Technical Drawing

Technical Specifications
Start Calculating to Develop your own Load Data for .280 Riml. N.E. Ross
Use our professional ballistics calculator to develop safe and accurate load recipes for .280 Riml. N.E. Ross.
Start CalculatingStandard Load Data — .280 Riml. N.E. Ross
Select your desired cartridge and bullet weight below to access the corresponding load table. From there, you can choose any listed load recipe and transfer it directly into the ballistics calculator for further refinement, optimization, and precision tuning.
.284 | 145gr | Barnes LRX BT
.284 | 140gr | Nosler Expansion Tip
.284 | 140gr | Sako Blade
.284 | 158gr | Sellier & Bellot XRG
.284 | 150gr | Swift Scirocco
.284 | 140gr | Swift A-Frame
.284 | 130gr | Fox Classic Hunter
.284 | 125gr | Hasler ARIETE
.284 | 128gr | Brenneke TUG Nature Plus
.284 | 120gr | Osprey Virtus
.284 | 125gr | Lehigh Defense Controlled Chaos
.277 | 140gr | Federal Trophy Bonded
.284 | 145gr | Fox Classic Hunter
.284 | 142gr | Lehigh Defense Controlled Chaos
.284 | 128gr | Brenneke TIG nature
.284 | 130gr | NorthFork Bonded Core
.284 | 139gr | MEN SF
.284 | 155gr | Federal Terminal Ascent Component
.284 | 140gr | NorthFork Bonded Core
.284 | 130gr | Alaska Bullet Works Kodiak SP SPBC
.284 | 165gr | Osprey Virtus
.284 | 140gr | Alaska Bullet Works Kodiak SP SPBC
.284 | 170gr | Hammer HHT
.284 | 150gr | Brenneke TOG
Frequently Asked Questions
The maximum pressure for .280 Riml. N.E. Ross is 47,137 psi | 3,250 bar.
.280 Riml. N.E. Ross typically uses a Large Rifle Magnum (LRM) primer.
The case capacity of .280 Riml. N.E. Ross is approximately 83 grains of water (H₂O).