7mm Remington Magnum

Know the exact name

At a glance

Cartridge family

Sporting & match rifle

Bullet specification

0.2845 in / 7.226 mmBullet maximum

Factory examples

21 loadsSelected, sourced examples below

Weight in cited examples

139–175 grGrains measure mass, not powder charge

7mm Remington Magnum is identified by its complete cartridge designation. The resource-table alternative is 7 mm Rem Mag. A caliber number, bullet diameter, or family resemblance on its own does not identify ammunition compatibility.

Dimensions: open the exact dimensional drawing ↗. The displayed number is bullet maximum, rather than an assertion that every manufactured projectile or barrel has this exact diameter.

Origins & evolution

Background & development

Remington introduced its 7 mm Magnum in 1962 together with the new Model 700 bolt-action rifle. That coordinated launch was important: the cartridge entered the market in a widely available sporting rifle suited to its intended use, rather than first appearing in a specialized or limiting platform.

Hunters were the primary audience, particularly those interested in open-country big-game rifles. The cartridge also developed a competitive record; Sierra notes a Wimbledon 1,000-yard match victory at Camp Perry eight years after its introduction. That success gave it a precision-shooting chapter beyond its commercial hunting origins. Its popularity made it one of the reference points against which later 7 mm sporting cartridges were compared. The Remington Magnum name therefore records a specific 1962 case-and-rifle combination, distinct from the later 7 mm-08, short magnums and PRC designs.

Historical sources: Sierra: 7mm Remington Magnum cartridge history ↗

Construction changes the story

Loads, variations & specialty offerings

In the cited 7mm Remington Magnum examples, bullet weights are 139, 140, 150, 154, 155, 160, 162, 168, 175 grains. These are the weights actually present in this source selection, not a claim that every possible loading is listed.

Bullet construction background: Hornady: anatomy of a bullet ↗. Exact product descriptions and velocities are cited in the factory table.

From the factory catalog

Explore the published data

Ballistics you can inspect

Select a legend entry to add or remove its line. Hover or tap a plotted point, or use the position slider. With the graph focused, arrow keys move the inspector. Solid dots identify source points; dashed connectors show estimates between them. Load construction, pressure category, and test setup can differ even at the same grain weight.

How to interpret the comparison

Changing bullet weight also often changes bullet design and propellant choice. Two curves are comparisons of the listed products, not a controlled experiment proving that bullet weight alone caused the difference. Catalog downrange points are projections under the maker’s conditions; barrel-study points are recorded observations in the study firearm.

Direct answers

Common questions

Keep exploring

Related references

Painted tips or polymer tips? Read the visual identification guide →

Browse the cartridge and gauge guides → · Return to the diameter comparison →

Trace the facts

Sources & methodology

Compiled by 2A Ledger from the linked standards, manufacturer publications, and identified test records. Checked October 18, 2026. Historical tests and older catalogs retain their original dates; a listing here does not establish current availability.

1. SAAMI: dimensional drawing · PDF p. 60 ↗
2. Sierra: 7mm Remington Magnum cartridge background ↗
3. Hornady · PDF p. 185 ↗
4. Federal · PDF pp. 52–53 ↗
5. Federal · PDF pp. 56–57 ↗
6. Federal · PDF pp. 58–59 ↗

Diameter figures preserve the cited drawing convention. Inch–millimeter conversion uses exactly 25.4 mm per inch. Factory specifications describe the maker’s test setup; your firearm, ammunition lot, temperature, and measuring method can produce different results. This is an educational factory-ammunition reference, not a reloading manual.