Nosler 300 SAUM 180gr Partition Trophy Grade – Superb 20 Round Box

Description

The 300 Remington Short Action Ultra Magnum never won the short-magnum wars, but the rifles chambered for it are still in the field and they still need feeding. The Nosler 300 SAUM 180gr Partition is the load worth putting through one.

• Why the Partition Is Still the Benchmark
• Nosler 300 SAUM 180gr Partition Specifications
• Honest Notes on Owning a 300 SAUM

Why the Partition Is Still the Benchmark

John Nosler designed the Partition in 1948 after a moose absorbed several conventional bullets without effect, and the solution he arrived at has not needed replacing since. A wall of copper divides the bullet into two lead cores. The front half expands violently and can shed most of its weight; the rear half is mechanically isolated from that damage and keeps driving forward regardless.

That two-stage behavior is why the Nosler 300 SAUM 180gr Partition still competes with bonded and monolithic bullets thirty-odd years after those arrived. Bonding keeps a bullet together but sometimes at the cost of expansion; a monolithic penetrates deeply but needs velocity to open. The Partition does both without needing to be babied, which is why guides have kept recommending it through five decades of bullet fashion.

Nosler loads this in Bend, Oregon, with its own premium brass rather than purchased cases. That matters if you reload, because Nosler brass is weight-sorted and neck-sized to tighter tolerance than most factory ammunition brass, and a box of Trophy Grade is a cheap way to acquire it.

Nosler 300 SAUM 180gr Partition Specifications

Velocity is 2950 feet per second for roughly 3478 foot-pounds at the muzzle, with a G1 ballistic coefficient of 0.474. Those are 300 Winchester Magnum numbers coming out of a short action, which was the entire premise of the SAUM: magnum performance in a rifle a foot shorter and a pound lighter than a long-action magnum.

The 180 grain weight is the right choice for this cartridge in almost every case. It gives up very little velocity to the 165 grain load while carrying meaningfully more sectional density, and sectional density is what gets a bullet through the far shoulder of an elk. If you own a 300 SAUM you almost certainly bought it as an elk rifle.

Recoil is genuine but manageable. A 300 SAUM in a seven-pound rifle kicks noticeably harder than a 30-06 and slightly less than a 300 Win Mag in the same weight, which is a fair trade for the shorter action.

• Cartridge: 300 Remington SAUM, Short Action Ultra Magnum
• Bullet weight: 180 grain
• Bullet type: Nosler Partition spitzer
• Muzzle velocity: 2950 feet per second
• Muzzle energy: approximately 3478 foot-pounds
• G1 ballistic coefficient: 0.474
• Case: Nosler premium brass, boxer primed, reloadable
• Series: Nosler Trophy Grade
• Rounds per box: 20
• Boxes per case: 10
• Manufacturer part number: 60062
• UPC: 054041600620

Honest Notes on Owning a 300 SAUM

Buy the Nosler 300 SAUM 180gr Partition if you own a 300 SAUM and hunt elk, moose, or big bear. This is the load the cartridge was built to deliver, and the Partition is the bullet that handles an imperfect angle without drama.

Skip the 180 grain and look at the 165 if your hunting is exclusively open-country deer and antelope, where the slightly flatter trajectory is worth more than the extra penetration.

Understand the real cost of the cartridge before you commit: 300 SAUM is a discontinued chambering with thin factory ammunition support. When you find it in stock, buy more than one box, and save the brass. That is not a knock on the round, which shoots beautifully, but it is the honest situation.

Same rifle, lighter bullet: the Nosler 300 SAUM 165gr Partition trades penetration for a flatter curve. If you shoot a second rifle, the Trophy Grade 308 Win 168gr ABLR is the long-range option in the family. Nosler documents Trophy Grade ammunition specifications on its own site.

MAG5 Firearms stocks ammunition for chamberings the big-box stores have given up on. If you shoot something uncommon, ask us before you assume it is unobtainable.