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300 Remington Short Action Ultra Magnum

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The .300 Remington Short Action Ultra Magnum (RSAUM) is a centerfire rifle cartridge developed by Remington Arms in 2001. It is designed for use in short-action rifles, offering magnum-level performance in a more compact case. The cartridge has a case length of 2.015 inches and can achieve velocities similar to the .300 Winchester Magnum but in a shorter, more efficient case, which allows for reduced rifle weight and potentially better handling.
The .300 RSAUM is suitable for a variety of big game hunting, including deer, elk, and moose, due to its high velocity and energy, which translate to effective terminal performance at various ranges. Bullet weights for this cartridge typically range from 150 to 200 grains, allowing for flexibility depending on the type of game being hunted and the shooting conditions.
This cartridge is known for its accuracy and has a relatively flat trajectory, made possible through the use of modern powders and bullet designs. It's popular among hunters and long-range shooters looking for a balance of power and manageability in a short-action rifle platform.

Die Sets
Lee Collet Necksizing 2-Die Set
Lee RGB Die Set
Lee Full-Length Sizing Die Set
Lee Breech Lock Die Set
Lee Ultimate 4-Die Set
Lee Loader
Single Dies
Full-Length Sizing Die
Sizing Die
Neck Sizing Die
Undersize Sizing Die
Charging Die
Seating Die
Factory Crimp Die
91251 (Collet Style)
Taper Crimp Die
Inline Bullet Feed Die
Case Conditioning Tools
Case Length Gauge and Shell Holder
90493
Quick Trim Die
91343
Presses
Reloader Press (50 RPH)
Hand Press (50 RPH)
Challenger Press (50 RPH)
Classic Cast Press (50 RPH)
Value Turret Press (250 RPH)
Classic Turret Press (250 RPH)
Ultimate Turret Press (250 RPH)
Pro 1000 Press (500+ RPH)
Pro 4000 Press (500+ RPH)
Six Pack Pro Press (500+ RPH)
Shell Plates and Holders
Priming Tool Shell Holder
Universal Press Shell Holder
X-Press Shell Holder (APP)
Pro 1000 Shell Plate
Auto Breech | Pro 4000 Shell Plate
Six Pack Pro Shell Plate
Inline Bullet Feed
Inline Bullet Feed Die
Inline Bullet Feed Kit
Inline Bullet Feed Magazine
Bullet Casting
Classic Bullet Sizing Kit
Breech Lock Bullet Sizer and Punch
Bullet Molds

Micrometer Adjust Screw

From $20.00

Power Grip Shell Holder

92149
$10.00

Challenger III

From $117.00

Ultimate Turret Press

From $320.00

Deluxe APP Press Kit

91898

Includes:

  • Press
  • Roller Handle
  • Priming System
  • Universal Case Feeder
  • APP Deprime Kit
  • Bottle Adapter
$155.00

Six Pack Pro Press

From $400.00