7.62x39 vs 5.56 NATO

Quick comparison

Ballistics comparison

The 7.62x39 vs 5.56 NATO ballistics comparison reveals two fundamentally different approaches to intermediate rifle performance. The 7.62x39 throws a heavy bullet at moderate velocity. The 5.56 throws a light bullet fast.

Key difference at a glance: At 300 yards, the 7.62x39 drops 19.5" while the 5.56 drops only 8.5" — more than twice the drop. But at the muzzle, the 7.62x39 hits 34% harder (1,520 vs 1,135 ft-lbs). The 7.62x39 is the harder hitter up close; the 5.56 is the better cartridge at distance.

Trajectory (100yd zero, 16" barrels)

5.56 NATO shoots dramatically flatter. At 300 yards, the 7.62x39 drops over twice as much as the 5.56. This trajectory gap is the single biggest ballistic difference between the two cartridges and defines their effective range.

Wind drift (10 mph crosswind)

The 7.62x39 drifts 40–50% more than M193 and roughly double the 77gr OTM. The 7.62x39's blunt bullet shape (BC ~0.300 for the 123gr FMJ) is poor for wind resistance compared to 5.56 options.

Energy at range

The 7.62x39 starts with a 25–35% energy advantage at the muzzle and retains it through 300 yards. By 400 yards, the 77gr OTM has overtaken it — the 5.56's superior BC starts to dominate despite the 7.62x39's heavier bullet.

Cost per round

7.62x39 has historically been the cheaper caliber due to massive Soviet/Eastern Bloc surplus production. The 2021 State Department import restrictions on Russian ammunition have narrowed this gap considerably.

Current brass-cased pricing:

• 7.62x39 (brass, new-manufacture): $0.25–0.40/rd
• 5.56 NATO (brass): $0.28–0.40/rd

Current steel-cased pricing:

• 7.62x39 (steel): $0.18–0.25/rd
• 5.56 NATO (steel): $0.20–0.28/rd

7.62x39 is still slightly cheaper on average, but the gap has compressed from $0.10–0.15/rd pre-2021 to roughly $0.03–0.05/rd now. Non-Russian manufacturers (S&B, PMC, Norma, Igman) have partially filled the supply gap, but at higher price points than the old Wolf/Tula imports.

Compare 7.62x39 prices → | Compare 5.56 prices →

Terminal performance

7.62x39

The standard 123gr FMJ (military ball) does not expand or fragment reliably. It tends to tumble and yaw after penetration, creating a wider wound channel than its diameter suggests, but performance is inconsistent. The Soviet M43 projectile has a mild steel core that can over-penetrate.

Expanding options: Soft point and hollow point 7.62x39 loads are available from Federal (Power-Shok), Hornady (SST), Winchester (PDX1), and others. These expand reliably and are suitable for hunting deer-sized game at 0–200 yards. At 200+ yards, the rainbow trajectory makes precise shot placement difficult.

5.56 NATO

M193 (55gr FMJ) fragments reliably above ~2,700 fps — which means effective fragmentation inside 100–150 yards from a 16" barrel. This fragmentation produces devastating wound channels at close range despite the small caliber.

M855 (62gr steel tip) is less predictable — it sometimes fragments, sometimes pencils through. Purpose-built defensive loads (Hornady TAP, Speer Gold Dot, Federal Fusion) offer reliable expansion across the 5.56 velocity range.

At close range (0–100 yards): Both are lethal. M193 fragments aggressively. 7.62x39 FMJ yaws and tumbles.

At medium range (100–300 yards): 5.56 expanding loads maintain better terminal performance due to retained velocity. 7.62x39 soft points work well but trajectory limits precision.

Recoil

5.56 NATO produces roughly 40% less recoil than 7.62x39 in comparable-weight rifles. In an 8-pound rifle:

• 7.62x39: ~8.5 ft-lbs recoil energy
• 5.56 NATO: ~5 ft-lbs recoil energy

This translates to faster follow-up shots and less fatigue with 5.56. The AK platform's long-stroke gas piston system adds a characteristic forward-back rocking motion to the recoil impulse, while the AR-15's direct impingement/short-stroke system delivers recoil more linearly into the shoulder.

Accuracy

The 5.56 NATO in an AR-15 is inherently more accurate than the 7.62x39 in an AK-pattern rifle.

This isn't entirely the cartridge's fault. AK manufacturing tolerances, trigger quality, and sight systems contribute to the accuracy gap. But the 7.62x39 cartridge itself is less inherently accurate — limited bullet selection, lower BCs, and less consistent ammunition from surplus-oriented manufacturers.

Modern AK variants (KUSA, Zastava ZPAPM70, Arsenal) with quality ammunition can achieve 2–3 MOA, but this still trails a basic AR-15.

Platform considerations

AK pattern (7.62x39)

• Legendary reliability in adverse conditions (mud, sand, extreme cold)
• Simpler manual of arms — fewer controls, fewer parts
• Heavier than most AR-15s (7.5–9 lbs typical)
• Limited aftermarket compared to AR-15 (though growing)
• Optic mounting is less standardized (side rail vs dust cover options)

AR-15 (5.56 NATO)

• Lighter weight (6–7.5 lbs typical)
• Vast aftermarket — grips, stocks, handguards, triggers, optics mounting
• Better ergonomics (bolt release, magazine release, safety placement)
• More precise out of the box
• Requires more maintenance in extreme conditions

When each caliber makes sense

Pick 7.62x39 if:

• Budget shooting with steel-cased ammo is the priority
• Hunting medium game at short to moderate range (under 200 yards)
• You prefer the AK platform's simplicity and reliability
• Barrier penetration matters (the heavier bullet carries more momentum through obstacles)

Go with 5.56 NATO if:

• Shots past 300 yards are realistic
• Accuracy and flat trajectory are priorities
• You want the broadest selection of rifles, ammunition, and accessories
• Weight matters (lighter ammo = more rounds for the same carry weight)
• Home defense (better options for over-penetration management)

New to rifles? If you're choosing your first rifle platform, the AR-15 in 5.56 NATO is the more versatile choice for most people — lighter, more accurate, easier to accessorize, and ammunition is widely available. The AK in 7.62x39 is a solid choice if you value simplicity, don't need precision past 200 yards, and want a platform that runs with minimal maintenance.

Related comparisons

• 5.56 ballistics chart — M193, M855, and 77gr OTM data
• Best ammo for AR-15 — AR-15 ammo picks by use case
• .300 Blackout ballistics — Supersonic and subsonic data
• .300 Blackout vs 5.56 — AR-15 caliber comparison
• 5.56 vs .223 Remington — Chamber compatibility
• 5.56 ammo types explained — M193, M855, and more
• Steel case vs brass case — Full comparison

Related caliber pages

• 7.62x39 ammo prices — Current pricing across all retailers
• Cheapest 7.62x39 right now — Lowest observed prices
• 7.62x39 price history — 30-day pricing trends
• 5.56 NATO ammo prices — Current pricing across all retailers
• Cheapest 5.56 NATO right now — Lowest observed prices
• 5.56 NATO price history — 30-day pricing trends

Search 7.62x39 ammo → | Search 5.56 ammo →

Sources

• Hornady Ballistic Calculator — Trajectory and wind drift data
• Federal Premium Ballistics Calculator — Velocity and energy reference
• SAAMI Cartridge Specifications — Pressure and dimension standards