.300 Remington SA Ultra Mag

.300 Remington Short Action Ultra Magnum

Type

Rifle

Place of origin

USA

Production history

Designer

Remington

Manufacturer

Remington

Produced

2001

Specifications

Parent case

.300 Remington Ultra Magnum

Bullet diameter

.308 in (7.8 mm)

Neck diameter

.344 in (8.7 mm)

Shoulder diameter

.534 in (13.6 mm)

Base diameter

.550 in (14.0 mm)

Rim diameter

.534 in (13.6 mm)

Case length

2.015 in (51.2 mm)

Overall length

2.825 in (71.8 mm)

Rifling twist

1-10"

Primer type

Large rifle magnum

Ballistic performance

Bullet weight/type	Velocity	Energy
150 gr (10 g) SP	3,253 ft/s (992 m/s)	3,525 ft·lbf (4,779 J)
165 gr (11 g) SPBT	3,126 ft/s (953 m/s)	3,581 ft·lbf (4,855 J)
180 gr (12 g) HPBT	2,954 ft/s (900 m/s)	3,489 ft·lbf (4,730 J)
200 gr (13 g) SP	2,790 ft/s (850 m/s)	3,458 ft·lbf (4,688 J)

Test barrel length: 24"
Source(s): Reloading data at Accurate Powder

.300 Remington Short Action Ultra Magnum (also known as 300 RSAUM, 300 RSUM or 300 Rem SAUM) is a .30 caliber short magnum cartridge that is a shortened version of the Remington 300 Ultra Mag, both of which derive from the 404 Jefferey case. The Remington Short Ultra Mag was put on the market shortly after Winchester released its 300 WSM round in 2001, resulting in the Winchester product getting the marketing advantage that has eclipsed the Remington offering.^[1]

Performance

The 300 RSAUM's ballistics are similar to 300 Win Mag and 300 WSM. The difference in ballistics between the WSM and RSAUM are insignificant in all practical applications. Differences in muzzle velocity and muzzle energy are related to barrel length rather than case dimension.

Muzzle velocity

10.69 g (165 gr) Full Metal Jacket(FMJ): 3,075 ft/s
11.66 g (180 gr) Full Metal Jacket(FMJ): 2,960 ft/s

Comparisons

The WSM has slightly more case capacity and thus, slightly more velocity
The WSM is more popular and more ammo and handloading data are available

.300 RSAUM performance comparisons ^[2]^[3]
Cartridge	Bullet Weight	Muzzle velocity	Muzzle energy
.30-06 Springfield	200	2569	2932
.300 RSAUM	200	2790	3458
.300 WSM	200	2822	3538
.300 Win Mag	200	2877	3677
.300 H&H Magnum	200	2913	3769
.300 Wby Mag	200	2987	3963
.300 RUM	200	3154	4419

References

↑ The .300 Remington Short Action Ultra Mag by Chuck Hawks
↑ .308 Caliber reloading data at Accurate Powder
↑ "Accurate Powder reload data table" (PDF). Archived from the original (PDF) on 20 March 2009. Retrieved 2009-02-09.

7mm-300 SAUM Cartridge Guide by AccurateShooter.com

Remington Firearms and Cartridges

Rifles

Bolt-action	JuniorTarget 521TL Remington-Keene rifle M1903 Springfield rifle Model 5 Model 6 Model 7 Model 30 Model 34 M40 Model 241 Model 341 Model 504 Model 511 Model 512 Model 513 Model 521 Model 580 Model 581 Model 582 Model 600 Model 660 Model 673 Model 700 Model 710 Model 720 Model 721 Model 722 Model 725 Model 770 Model 788 Model 798 Model 799 M24 Sniper Weapon System M2010 Enhanced Sniper Rifle Modular Sniper Rifle R5 Remington Gas System

Pump-action	Model Six Model 14 Model 121 Model 141 Model 572 Model 572 Fieldmaster Model 760 Model 7600 Model 7615

Semi-automatic	Nylon 66 Model Four Model 8 Model 24 Model 522 Model 552 Model 597 Model 740 Model 742 Model 7400 Model 750 Model R-15 Model R-25 RSASS

Automatic	Adaptive Combat Rifle

Single shot	Rolling Block

Shotguns

Pump-action	Model 10 Model 17 Model 29 Model 31 Model 870 Model 887

Semi-automatic	Model 11 Model 11-48 Model 58 Model 878 Model 1100 Model 11-87 Model SP-10 SPR 453

Break-action	SPR 100 SPR 310

Handguns

Semi-automatic	1911 R1 Model 51 R51

Revolver	Model 1858 Model 1875 Model 1890

Derringer	Model 95 Rider Single Shot Pistol Zig-Zag Derringer

Other	XP-100

Cartridges

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.300 Remington SA Ultra Mag

Performance

Muzzle velocity

Comparisons

See also

References