Is .308 the same as 7.62 x51mm?

While both .308 Winchester and 7.62x51mm NATO cartridges have similar bullet diameters (approximately 7.62mm), they are not identical. The key difference lies in the chamber pressure and specifications. .308 Winchester is designed for civilian use and typically has slightly higher chamber pressures compared to the 7.62x51mm NATO, which is a military cartridge.

Answer: .308 and 7.62x51mm are very similar, but not the same.

The main concern with interchangeability is using military 7.62x51mm NATO ammunition in a rifle chambered for .308 Winchester. While it’s generally safe to fire .308 Winchester ammunition in a rifle chambered for 7.62x51mm NATO, the reverse is not advisable due to potential safety risks.

The differences between .308 and 7.62x51mm lie in chamber dimensions and pressure standards. This means that while these cartridges are very similar, it’s essential to follow manufacturer guidelines and use the appropriate ammunition for your firearm to ensure safety and accuracy. Always check the markings on your firearm and ammunition to ensure compatibility.