What to Know About .308 Winchester Ammunition

.308 Winchester ammunition is a popular centerfire rifle cartridge used for hunting, target shooting, and other sporting applications. Known for its broad commercial availability and range of bullet options, it comes in multiple bullet weights and projectile designs. Understanding its specifications and compatibility requirements helps buyers compare products and select ammunition appropriate for their rifle.

What Is .308 Winchester Ammunition?

Introduced in the 1950s, .308 Winchester is a commercial rifle cartridge that shares a close relationship with the 7.62×51mm NATO cartridge. It is available in a wide range of factory loads, with performance varying according to bullet construction, weight, and manufacturer specifications.

When shopping for .308 Winchester ammunition, check the exact cartridge designation on the packaging and confirm that it matches your firearm’s requirements.

Common .308 Winchester Bullet Weights

Bullet weight is measured in grains. Common .308 Winchester bullet weights include:

• 150 grain: A widely available option in many commercial hunting and sporting loads.
• 165 grain: A popular middle-weight choice offered in several projectile designs.
• 168 grain: Common in target-oriented and match ammunition.
• 175 grain: Often found in precision-oriented loads.
• 180 grain: Frequently available in hunting ammunition.

These are common examples rather than a complete list. Suitable bullet weight depends on the firearm, ammunition specifications, and intended sporting application.

Types of .308 Winchester Ammunition

Commercial .308 Winchester ammunition is available with different projectile constructions for different applications.

• Full metal jacket (FMJ): Commonly used for target practice where permitted.
• Soft point: Features an exposed lead tip and is commonly available in hunting loads.
• Hollow point: Uses a cavity in the bullet’s nose; its performance depends on the specific design.
• Polymer-tipped: Uses a polymer tip and is available in selected sporting and hunting loads.
• Match ammunition: Designed around accuracy-oriented specifications and components.

Not every projectile design is intended for every purpose. Review the manufacturer’s description and applicable regulations before purchasing.

.308 Winchester vs. 7.62×51mm NATO

The .308 Winchester and 7.62×51mm NATO cartridges are closely related, but they follow different specifications and testing standards. Differences in chamber dimensions and pressure standards mean that compatibility should not be assumed for every firearm and load.

Ammunition that appears similar may not be approved for a particular rifle. Always follow the firearm manufacturer’s documentation and use only ammunition specifically confirmed as compatible.

Understanding .308 Winchester Cartridge Specifications

When comparing .308 Winchester cartridge specifications, pay attention to:

• Bullet weight: The projectile’s mass in grains.
• Muzzle velocity: The stated speed under the manufacturer’s testing conditions.
• Projectile construction: The design and materials used in the bullet.
• Ballistic information: Published performance figures that may include trajectory and energy.
• Compatibility: The cartridge designation approved for your rifle.

Velocity and energy can vary with barrel length and the individual load. Compare product data using similar testing conditions for a more meaningful assessment.

How to Choose the Right .308 Winchester Ammunition

Start by checking the rifle’s chamber marking and owner’s manual. Confirm the exact cartridge designation before purchasing ammunition.

Then compare bullet weight, projectile type, and manufacturer specifications for your intended sporting use. Inspect cartridges before use, and never fire ammunition that is damaged, corroded, or incorrectly identified. Store ammunition in a cool, dry place and follow established firearm safety practices.

Final Thoughts

.308 Winchester ammunition offers a wide selection of bullet weights and projectile designs for different sporting applications. Understanding the differences between FMJ, soft-point, match, and other loads makes product comparisons easier. Always verify cartridge compatibility and follow the manufacturer’s recommendations before using ammunition in your rifle.