.308 Winchester Ammo

What is .308 Winchester?

.308 Winchester was introduced by Winchester in 1952 — two years before the U.S. military officially adopted the near-identical 7.62×51mm NATO round. Winchester saw the commercial potential in Frankford Arsenal’s T65 experimental cartridge and got to market first. The military followed with the M14 rifle in 1957, then the M60 machine gun and M21 sniper rifle. The cartridge has been in continuous U.S. military service ever since.

For civilian shooters, the .308 Win became the dominant American hunting and precision rifle cartridge. It works on everything from whitetail to elk, hits sub-MOA from quality rifles, and sits in the sweet spot between recoil and long-range capability. Bolt-action guns for every budget are chambered in it. Match ammo is widely available. Components for reloading are universal.

.308 Win vs 7.62×51 NATO: the safety answer

The .308 Win and 7.62×51 have identical external case dimensions but different pressure specs and headspace standards. This matters.

SAAMI max pressure for .308 Win: 62,000 PSI
NATO spec for 7.62×51: ~58,000–60,000 PSI (depending on measurement method)
NATO chamber headspace: ~0.006” longer than SAAMI .308 Win

The safe rules:

• Rifle marked “.308 Win”: Fire both .308 Win and 7.62×51 NATO safely. The thicker NATO brass handles the .308 chamber without issue.
• Rifle marked “7.62 NATO” or “7.62×51” (most surplus military rifles — FAL, M14, G3): Stick to 7.62 NATO-spec ammo. The longer NATO chamber allows commercial .308 brass to stretch further before support, and commercial loads at max 62,000 PSI can cause case-head separation in worn NATO chambers.
• Rifle marked “7.62/.308”: Manufacturer has confirmed dual compatibility.

The risk isn’t theoretical for old surplus rifles. For any modern .308 Win bolt-action from a major manufacturer, both cartridges are fine.

Bullet weight guide

147gr (M80 ball) — Standard NATO FMJ. Cheapest .308 training ammo. G7 BC ~0.200 — relatively low, meaning it loses velocity faster past 500 yards. Supersonic to about 900 meters. Best for: high-volume semi-auto training, steel targets.

150gr — Common hunting weight. Flat trajectory to 300 yards, adequate energy for deer at hunting distances. Better BC than M80 when loaded as a soft point or ballistic tip. Federal Fusion 150gr is the best value deer load.

155gr (Palma) — Competition-specific weight. Very high velocity loads (2,950–3,050 fps from a 26”+ barrel) can stay supersonic past 1,000 yards due to speed advantage over heavier bullets. Only relevant for Palma and Fullbore long-range rifle competition.

168gr (Sierra MatchKing BTHP) — The NRA High Power standard, the benchmark for .308 precision for decades. G1 BC .447. Stays accurate to ~800 yards — critical limitation: it enters the transonic zone (~850–875 yards) and destabilizes past that point. Federal Gold Medal Match 168gr is the reference load.

175gr (Sierra MatchKing BTHP — M118LR spec) — The step up that matters. G1 BC .505. Stays supersonic to ~1,000 yards at sea level. This is the U.S. military M118LR sniper standard, the USSOCOM precision round. For any shooting past 800 yards, 175gr is the correct choice — not 168gr.

178gr (Hornady ELD-M) — Highest BC in common factory .308 ammo. G1 BC .547. Less wind drift than 175gr SMK, supersonic to ~1,025 yards. The best choice for precision competition when you’re at the edge of .308’s supersonic envelope.

180gr — Hunting-only weight. Maximum penetration and sectional density. Nosler Partition 180gr is the classic elk and bear load — dual-core construction stops jacket-core separation through heavy bone. Keep shots under 300 yards; the arc gets pronounced past 350 yards.

Long-range precision: what .308 can and can’t do

At 600 yards and under, .308 Win is excellent. Manageable wind drift, sufficient energy for competition scoring, and every quality bolt-action will group sub-MOA with 168gr match ammo.

Past 800 yards is where honest comparison matters:

168gr SMK at 1,000 yards: The bullet enters transonic instability (~850–875 yards) and scatter begins. Wind drift is approximately 37+ inches in a 10 mph full-value crosswind. This is why competition shooters switched away from 168gr for 1,000-yard events.

175gr SMK at 1,000 yards: Just supersonic at sea level in standard conditions. Wind drift ~37 inches (10 mph full value). Doable by skilled shooters at precision rifle matches — but it requires precise wind calls. There’s little margin for error.

6.5 Creedmoor at 1,000 yards: For comparison, a 143gr ELD-X has ~25 inches of wind drift at 1,000 yards in the same conditions — 12 inches less than the 175gr SMK. The .308 requires a more precise wind call at distance. Skilled shooters account for this; beginners building a precision rifle should consider 6.5CM.

.308 Win vs 6.5 Creedmoor

Where 6.5 Creedmoor is better:

• 12–22% less wind drift at all distances past 300 yards
• Flatter trajectory (80+ inches flatter at 1,000 yards)
• Stays supersonic 200+ yards farther
• 25–35% less felt recoil (helps with calling your own shots and reducing fatigue)
• Dominant in PRS and NRL precision rifle competition

Where .308 Winchester is better:

• 13–32% more muzzle energy inside 300 yards — meaningful for elk and larger game
• .308” bullet creates larger frontal area than .264” — wider wound channels on deer
• Universal availability — stocked at rural hardware stores, Walmart, everywhere
• Wider platform selection at budget price points
• All AR-10, SCAR 17, M1A, FAL, SR-25 platforms run .308/7.62
• Some states have minimum bore diameter requirements for deer; check local regs

Verdict: For new long-range precision rifle builds, 6.5 Creedmoor is objectively better past 500 yards. For hunters who need energy at 300 yards, universal ammo availability, and semi-auto capability, .308 is completely valid. If you already own a .308, it’s entirely capable — it just needs more precise wind calls past 600 yards.

Best loads by use case

Deer hunting (under 300 yards): Federal Fusion 150gr ($1.10–1.50/rd) — bonded construction, excellent value. Federal Terminal Ascent 175gr for shots to 400 yards — bonded, BC .520.

Elk and large game: Federal Terminal Ascent 175gr or Nosler Partition 180gr. Bonded or partitioned construction is mandatory for shoulder-bone penetration. Minimum 1,500 ft-lbs energy at impact — the 175gr Terminal Ascent delivers this to ~450 yards.

Precision long-range (under 800 yards): Federal Gold Medal Match 168gr Sierra MatchKing. The NRA High Power standard. Sub-MOA from quality rifles.

Precision long-range (800–1,000 yards): Federal Gold Medal Match 175gr SMK (GM308M2) — the definitive factory .308 long-range load. Or Hornady Match 178gr ELD-M for the highest BC option.

Semi-auto training (AR-10, SCAR 17, M1A): Hornady Frontier M80 149gr or PMC Bronze 147gr — NATO-spec pressure that these gas systems were designed for. Save the commercial .308 loads for bolt-action work.

What makes match ammo different

Training ammo is loaded for function. Match ammo is loaded for consistency. The practical differences:

Muzzle velocity standard deviation (SD): Budget training ammo: SD 15–25 fps. Federal Gold Medal Match: SD ≤10 fps. Black Hills: often single-digit SD. At 1,000 yards, every 10 fps of SD variance produces roughly 1 inch of vertical stringing.

Brass quality: Match loads use premium cases (Lapua, Lake City match, Norma) with consistent primer pocket depth, deburred flash holes, and annealed necks. Federal’s GM762M2 notes its Lake City brass is specifically annealed — which is why it cycles reliably in semi-auto platforms.

Bullet tolerance: Sierra MatchKing bullets are measured to tighter concentricity tolerances than hunting bullets. Consistent bullet weight and jacket thickness means consistent BC shot to shot.

The bottom line: at 300 yards and under, budget FMJ and match ammo group within 1–2 MOA of each other. At 800–1,000 yards, that SD difference translates to 3–5 inches of vertical stringing that has nothing to do with your shooting. Match ammo is worth it for long-range work.

Price guide (2025–2026)

Rifles chambered in .308 Winchester

Bolt-action:

• Remington 700, Ruger Precision Rifle, Ruger American
• Savage 110 series, Winchester Model 70
• Tikka T3x, Bergara B-14
• Christensen Arms Mesa, Mesa FFT

Semi-automatic:

• Aero Precision M5 (AR-10 platform), DPMS LR-308
• FN SCAR 17S — FN recommends 7.62 NATO-spec ammo
• Springfield Armory M1A / M21
• DSA FAL, HK G3/HK91 variants
• LaRue Tactical OBR 7.62, Knight’s Armament SR-25

State restrictions

.308 Winchester rifles are generally unrestricted. AR-10 platform rifles may face assault weapon restrictions in California, New York, New Jersey, Maryland, Massachusetts, Connecticut, and Hawaii based on features. Ammunition purchases follow state law on background checks.