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.
no You could use the 308 ammo in an Enfield.
NO!!
no!!!!!!!
The cartridge known as the 7mm-08 was derived from the .308 Win (7.62x51mm). The casing mouth is necked down from the original 7.62mm (.308") to 7mm (roughly .280").
that would depend on which 7mm cartridge you are referring too. ie 7mm-08, 7mm Rem mag, etc
Only 7mm magnum ammo made by a reputable ammunition maker provided the rifle is in working order.
Both calibers have alot power but the 7mm is more powerful due to the fact that the bullets of the 7mm are in a higher grain than the .308. The 7mm also has a much higher recoil than the 308 and even the 30-06, both calibers have a high standard of performance but its no question the 7mm remington is more powerful
You may use any brand of 7mm Magnum rifle ammo.
Any .308 Winchester ammunition.
No.
a "308" measures .308 inches while most 30 caliber ammo measures .312 inches. Strange as it may seem both are classifies as 30 caliber ammo.
7mm if weapon and ammo availability and cost is of any consideration...