300 Rem Ultra Mag

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300 Rem Ultra Mag is Jack Sparrow’s caliber of choice because it is abbreviated 300 RUM. The 300 Remington Ultra Mag might win the award for the round with the most names: 300 Ultra Mag, 300 RUM, 300 Remington Ultra Mag, 300 Rem Ultra Mag, 7.62×72mm are all names that refer to the same round, the .300 Rem Ultra Mag.

Overview of 300 RUM

The parent case of the .300 Remington Ultra Mag is the .404 Jeffery. Remington introduced the .300 RUM cartridge in 1999 and it is still in production to this day.

300 Rem Ultra Mag Headstamp

300 RUM is a beltless bottleneck cartridge with a bullet diameter of .308 inch and it uses large rifle magnum primers.

These cartridges were formed from .404 Jeffery cases by turning down the rim and reducing the taper.

Purpose of 300 RUM

The 300 Remington Ultra Mag cartridge was created for long-range hunting to deliver enough energy on target to effectively take the game.

The 300 RUM cartridge delivers on its purpose as it’s able to deliver heavy rounds at high velocities and retain its energy to effectively take game at much longer ranges than .30-06 Springfield and even the .300 RCM.

Performance of 300 RUM

Since the purpose of 300 RUM is to take medium-sized game at long range so it’s important to analyze the bullet drop of the round during long flight distances.

Muzzle100 Yards200 Yards300 Yards500 Yards
ft second
ft second
ft second
ft second
ft second
Bullet Drop−1.5 in 2.6 in3.2 in 0 in −20.9 in

As you can see in the table above out to 500 yards there’s still a substantial amount of energy delivered on target and the bullet drop is still extremely manageable.

Guns that Shoot 300 RUM

Some of the most popular rifle models are now available in 300 RUM and it’s becoming an increasingly popular option for long range hunters.

Browning X-Bolt

browning 300rum
Browning X-Bolt in 300 Ultra Mag

The Browning X-Bolt is an extremely popular rifle and is well known for its quality. The Browning X-Bolt does come at a pretty penny of nearly $2,000.

Remington 700

The Remington 700 is one of the most popular bolt action rifles in history. There are a huge number of options and variations to the Remington 700.

You can purchase a number of those models chambered in 300 RUM.

300 RUM Ammo Price and Availability

If you’ve taken a look at the price of the rifles than you know 300 RUM ammo isn’t gonna be cheap.

300 RUM Box of Ammo

300 RUM ammo can be upward of $6 per round and nearly $120 for a 20 round box. Availability can also be an issue as a lot of local gun stores may or may not carry the 300 RUM rounds so you may be stuck buying your 300 RUM ammo online.

Here are a few online stores to buy ammo that may have 300 RUM ammo.

Palmetto State Armory has a decent selection of brands, but it may or may not be in stock depending on availability at this time.

Gun Mag Warehouse ammo can be hit or miss but it’s a good place to look if you are trying to do a comprehensive search for in stock ammo.

Midway USA always seems to be able to keep hard-to-find calibers in stock. Be sure to stop by and see if they have 300 Ultra Mag ammo in stock.


What is a 300 ultra mag good for?

This round is perfect for long-range game hunting or even long-range target shooting. This is one of the most effective rounds for long-range hunting at 300-500 yards.

Who makes a 300 ultra mag?

A number of rifle makers make guns for the 300 Ultra Mag. Browning and Remington to name two of the most popular manufacturers currently making guns chambered in 300 RUM.

How much recoil does a 300 Ultra Mag have?

The 300 Ultra Mag has a good bit of recoil. How much is hard to explain but more than you’d find with a lot of calibers given the amount of powder these rounds contain.

Take a look at some of the other less known calibers like the 416 Ruger, 7mm Remington Magnum, or the 222 Remington.

Michael Savage
Michael Savage

Michael is the President of Lynx Defense and an avid gun owner and outdoors man. He's passionate about helping find the best bang for your buck and helping others learn about firearms and the industry as a whole.

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