7mm-08 vs 308The 7mm-08 Remington is a rifle cartridge that is nearly a immediate duplicate of the wildcat cartridge developed about 1958 often known as the 7mm/308. As these names would counsel, it's the .308 Winchester case necked down to accept 7 mm (.284) bullets with a small increase in case size. Of cartridges based mostly on the .308, it is