7mm SAUM Ammo & Brass For Sale | Short Action Ultra Magnum

Introduced in 2002 to deliver magnum performance out of a compact, short-action platform, the 7mm Remington Short Action Ultra Magnum—affectionately known as the 7mm SAUM—is a masterclass in ballistic efficiency. By utilizing a short, fat, beltless case structure, the 7mm SAUM burns powder in a highly uniform manner, mimicking the downrange performance of the legendary 7mm remington magnum but with less powder, reduced recoil, and a lighter overall rifle profile.

Though factory-loaded 7mm saum ammo can be incredibly difficult to track down through standard retail channels, it has maintained a dedicated, cult-like following among precision long-range shooters and high-alpine hunters running custom 7mm saum rifles.

At Prime Reloaders, we cater to niche performance shooters by stocking premium 7mm saum brass from top-tier manufacturers alongside available factory loads. Whether you are prepping for a precision rifle competition or handloading a match cartridge for your next big game expedition, explore our in-stock inventory below to find the high-quality components your short-action magnum requires.

7mm SAUM & Ultra Magnum FAQ

Q: What is the difference between 7mm SAUM and 7mm RUM (Remington Ultra Magnum)? A: Despite the similar naming conventions, they are entirely different in size and action length. The 7mm SAUM is a short-action cartridge designed to fit into lighter, shorter bolt-actions. The 7mm remington ultra mag (7mm RUM) is a massive, full-length long-action cartridge that holds significantly more powder. The 7mm RUM produces much higher velocities but comes with substantially heavier recoil and faster barrel wear.

Q: Can I fire 7mm SAUM ammunition in a standard 7mm Remington Magnum rifle? A: No, never. The 7mm Rem Mag is a belted, long-action cartridge, while the 7mm SAUM is a wider, beltless, short-action round. Their chamber dimensions are completely incompatible. Always match the stamped caliber on your rifle’s barrel exactly to the cartridge box.

Q: Why is 7mm SAUM brass so popular for custom rifle builds? A: Precision reloaders love 7mm SAUM because its shorter case length allows long, high-BC (ballistic coefficient) 7mm bullets to be seated far out in the case mouth while still feeding cleanly through standard short-action magazines. This setup yields superb inherent accuracy and remarkable consistency at extended ranges.