Both serve a purpose but the 300 has a bit of an advantage. There is alot more factory ammo produced for the 300. YOu also have the option of heavier bullets resulting in more energy . This makes it a better choice for big game such as elk and moose.
7mm Magnum and 300 Winchester Magnum
243, 270, 30/06, 7mm Magnum, 300 Magnum
AFAIK, no one has tried to make an AR upper in 7mm Magnum
I have had personal experience with both cartridges but I have noted that my 7mm magnum barrels heat up quite quickly which can result in a change in accuracy. In terms of ballistics, the 7mm magnum outclasses the 30-06 by a long stretch. Both cartidges are excellent and an opinion would be irrelevant. The choice is soley up to you as to what you need.
NO!!
Depends which 7mm your talking about. The only 7mm I know of that has a larger case capacity than the 300 wby mag is the 7mm Remington ultra mag or 7mm rum
NO, doubt it would even seat completely in. The base of the 7mm magnum (case before neck) is longer then a 30-06.
no even though the projectile (Bullet) is the same diameter and weight, the cartridge cases are very different, the 7mm rem mag is a belted magnum, and is larger in length and diameter than 7mm mouser cartridge. in other words the 7mm magnum is too big to fit in the M24's chamber
You will have to define what "accurately" means.
Define 7mm. Do you mean 7mm Mauser ( a little less than 30-06), or 7mm Magnum, (a bit more than 30-06)
The 30-06 shoots a bullet which is 7.62 mm in diameter, so the 30-06 is "bigger" in that sense. Several different weights of bullet are available in either caliber, so that's an undetermined variable. There are several different 7mm cartridges (7mm Mauser, 7mm Magnum, 7mm H&H, 7mm-08), so you have to be more specific when comparing ballistics.
The .308 has a larger DIAMETER bullet, being 7.62 mm (versus 7mm) However, SOME 7mm cartridges may be longer than the .308, such as the 7mm Magnum.