What Should You Know Before Buying .308 Ammo in 2026?

.308 Winchester vs. 7.62×51 NATO

The first question is not which brand to buy; it is what your rifle is chambered to fire. .308 Winchester is a commercial cartridge standardized in the United States by SAAMI, while 7.62×51 NATO is a military cartridge specification. The cartridges are dimensionally similar, but chamber designs, pressure standards, test procedures, brass construction, and firearm requirements can differ.

A rifle marked only 7.62×51 should not be fed commercial .308 Winchester simply because the cartridges fit. Likewise, owners should verify whether a .308 Winchester firearm is approved for the specific 7.62 ammunition under consideration. The barrel marking, owner’s manual, and firearm manufacturer’s written guidance take priority over internet rules of thumb. SAAMI publishes useful ammunition and chamber technical information for consumers and the firearms industry.

Be especially cautious with unidentified loose cartridges, military surplus of uncertain origin, handloads made by someone else, and ammunition showing corrosion, deep dents, loose bullets, high primers, or damaged case mouths. A low price cannot compensate for unknown provenance.

Choose Bullet Weight and Construction by Purpose

There is no universally best .308 load. A 147- or 150-grain full-metal-jacket load can be practical for training, function testing, and recreational shooting. It may not deliver the consistency of match ammunition or the controlled expansion expected from a hunting bullet.

For deer-sized game, hunters commonly evaluate expanding bullets in the 150- to 180-grain range. Construction is as important as weight: conventional cup-and-core bullets, bonded bullets, partition-style designs, and solid-copper projectiles can produce different expansion and penetration. Select a load whose manufacturer identifies it as appropriate for the animal and expected impact velocity. Match bullets such as popular 168- and 175-grain offerings are engineered for accuracy, but an open tip does not necessarily make a bullet a legal or ethical hunting projectile.

Rifles are individuals. Barrel length, rifling twist, chamber dimensions, bedding, muzzle devices, and the shooter can all affect results. Different loads can also strike several inches apart at distance, so confirm the rifle’s zero whenever changing bullet weight, brand, or product line.

Reliability, Accuracy, and Total Cost

Buy one or two boxes before committing to bulk ammunition. From a stable position, compare groups at the same distance and record environmental conditions. In a semiautomatic rifle, also watch for failures to feed, lock, fire, extract, or eject. Stop shooting if you encounter abnormal recoil, unusual sound, smoke escaping from the action, a pierced primer, or a suspected bore obstruction.

Evaluate value by cost per round, shipping or transfer expenses where applicable, accuracy, and reliability. Factory seconds, remanufactured cartridges, steel-cased loads, and surplus ammunition may be cheaper, but each can involve tradeoffs in consistency, reloadable brass, storage history, or compatibility. Follow the firearm maker’s ammunition restrictions and warranty terms.

If a rifle will be used defensively, for hunting, or in competition, buying the same lot can reduce one source of variation. Store ammunition in its original labeled packaging in a cool, dry location away from children, unauthorized users, excessive heat, moisture, and solvents. The original box preserves caliber, load, warning, and lot information that may be essential during a recall.

Legal and Practical Checks Before Checkout

Ammunition laws vary by jurisdiction and can change. Confirm current state and local rules governing online sales, purchaser eligibility, delivery, transport, possession, and hunting. Hunters must also review the current season’s regulations. California’s official nonlead ammunition guidance explains its statewide requirement for taking wildlife with a firearm.

For subsonic .308 ammunition, verify barrel-twist suitability, bullet stability, suppressor compatibility, and semiautomatic cycling with the relevant manufacturers. A subsonic cartridge may not cycle every gas-operated rifle, and an unstable projectile can endanger a suppressor. Never attach a suppressor or shoot specialty ammunition without confirming that the entire system is compatible.

Responsible ammunition selection supports accurate shooting, ethical hunting, dependable firearms, and informed exercise of Second Amendment rights. Readers can follow latest firearms news, shop firearms and ammunition, and explore shooting accessories while comparing options.

Ready to select the right load for your rifle? Visit BT Gun Company for firearms, ammunition, accessories, and assistance from a licensed FFL dealer.