The 7mm-08 Remington
By Chuck Hawks
In 1980 Remington did the obvious and designed a 7mm cartridge based on a necked-down .308 Winchester case. The new Remington 7mm-08 specified a maximum case length of 2.035" and a maximum cartridge length of 2.80". The correct bullet diameter is .284". MAP is 52,000 cup.
All major U.S. ammunition manufacturers offer 7mm-08 factory loads. Remington, for example, loads a 120 grain spitzer bullet (SD .213) to a MV of 3,000 fps and ME of 2,398 ft. lbs. They load their 140 grain bullets to a MV of 2,860 fps and ME of 2,543 ft. lbs.
Reloads can equal or in some cases slightly exceed the velocity of the factory loads, which are loaded pretty close to the maximum SAAMI pressure in 7mm-08. The reloader has access to bullets weighing from 100 to 175 grains. However, 120 to 150 grain bullets remain the obvious choices.
Medium burning rifle powders are usually best in the 7mm-08. H414, H380, IMR 4350, and W760 are among the recommended powders.
The sixth edition of the Hornady Handbook of Cartridge Reloading shows that 39.5 grains of W760 powder drove their 120 grain bullets at a MV of 2500 fps, while a maximum load of 49.7 grains of W760 gave the same bullets a MV of 3000 fps. These Hornady loads used Hornady brass and Rem. 9 1/2 primers, and were tested in a 24" rifle barrel.
The Barnes Reloading Manual Number One shows the following loads for the 7mm-08: 43.0 grains of H414 powder behind a 140 grain bullet for a MV of 2578 fps, and 47.0 grains of H414 behind the same bullet for a MV of 2874 fps.
40.0 grains of H414 behind a 150 grain Barnes bullet gave a MV of 2450 fps, and 44.0 grains of the same powder gave a MV of 2714 fps. These Barnes loads used Remington brass and Federal 210 primers, and were chronographed in a 26" barrel.
Note: A full length article about the 7mm-08 Remington can be found on the Rifle Cartridge Page.
Copyright 2004, 2013 by Chuck Hawks. All rights reserved.