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| 7mm Remington Magnum | ||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 Left to right: .308 Winchester, .284 Winchester and 7mm Remington Magnum | ||||||||||||||||||||||||
| Type | Rifle | |||||||||||||||||||||||
| Place of origin | United States | |||||||||||||||||||||||
| Production history | ||||||||||||||||||||||||
| Designer | Remington Arms Company | |||||||||||||||||||||||
| Designed | 1962 | |||||||||||||||||||||||
| Manufacturer | Remington | |||||||||||||||||||||||
| Produced | 1962–present | |||||||||||||||||||||||
| Specifications | ||||||||||||||||||||||||
| Parent case | .375 H&H Magnum | |||||||||||||||||||||||
| Case type | Rimless, bottleneck | |||||||||||||||||||||||
| Bullet diameter | .284 in (7.2 mm) | |||||||||||||||||||||||
| Land diameter | .277 in (7.0 mm) | |||||||||||||||||||||||
| Neck diameter | .315 in (8.0 mm) | |||||||||||||||||||||||
| Shoulder diameter | .491 in (12.5 mm) | |||||||||||||||||||||||
| Base diameter | .512 in (13.0 mm) | |||||||||||||||||||||||
| Rim diameter | .532 in (13.5 mm) | |||||||||||||||||||||||
| Case length | 2.5 in (64 mm) | |||||||||||||||||||||||
| Overall length | 3.29 in (84 mm) | |||||||||||||||||||||||
| Case capacity | 82.0 gr H2O (5.31 cm3) | |||||||||||||||||||||||
| Rifling twist | 1/9 in (230 mm) to 1/10 in (250 mm) | |||||||||||||||||||||||
| Primer type | Large rifle magnum | |||||||||||||||||||||||
| Maximum pressure (C.I.P.) | 62,366 psi (430.00 MPa) | |||||||||||||||||||||||
| Maximum pressure (SAAMI) | 61,000 psi (420 MPa) | |||||||||||||||||||||||
| Maximum CUP | 52,000 CUP | |||||||||||||||||||||||
| Ballistic performance | ||||||||||||||||||||||||
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| Test barrel length: 24 in (610 mm) Source(s): Accurate Powder [1] | ||||||||||||||||||||||||
The 7mm Remington Magnum rifle cartridge was introduced as a commercially available round in 1962,[2] along with the new Remington Model 700 bolt-action rifle. It is a member of the belted magnum family that is directly derived from the venerable .375 H&H Magnum.[3] The original purpose of the belted magnum concept taken from the .300 H&H Magnum and .375 H&H Magnum, was to provide precise headspace control, since the sloping shoulders, while easing cartridge extraction, were unsuitable for this purpose. Improved cartridge extraction reliability is desirable while hunting dangerous game, in particular when a fast follow-up shot is required. The 7mm Remington Magnum is based on the commercial .264 Winchester Magnum, .338 Winchester Magnum, and .458 Winchester Magnum, which were based on the same belted .300 H&H Magnum and .375 H&H Magnum cases, trimmed to nearly the same length as the .270 Weatherby Magnum.[3]
- ^ 7 mm Remington Magnum data from Accurate Powder"
- ^ Accurate (2000). Accurate Smokeless Powders Loading Guide (Number Two (Revised) ed.). Prescott, AZ: Wolfe Publishing. p. 247. Barcode 94794 00200.
- ^ a b Speer Reloading Manual