5.56x45mm NATO 55gr FMJ (M193)
$13.00
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5.56x45mm NATO 55gr FMJ (M193) is a standard, non-corrosive, brass-cased rifle cartridge designed for AR-platform rifles, featuring a 55-grain full metal jacket boat tail (FMJBT) bullet. It offers high velocity (~3,240+ FPS) suitable for target practice, training, and varmint hunting, providing consistent performance.
Key Characteristics and Specs
- Bullet Weight: 55 Grain (gr)
- Bullet Type: Full Metal Jacket Boat Tail (FMJBT)
- Velocity: ~3,167–3,260 feet per second (FPS)
- Energy: ~1,282–1,294 foot-pounds (ft-lbs)
- Case: Boxer-primed, reloadable brass
- Usage: Training, target shooting, and varmint hunting (<50 lbs)
Key Details
- Performance: Designed for reliability in semi-automatic rifles, with consistent, flat-shooting, and accurate results.
- M193 Standard: Generally indicates military-spec (or similar) ammunition with specific velocity requirements.
- Compatibility: Ideal for rifles with 1:7 to 1:12 twist barrels, although 1:7 or 1:9 are standard for 5.56 NATO.
- Common Manufacturers: Includes Frontier, Winchester, GGG, PMC, and IMI.
Important Considerations
- Pressure: 5.56 NATO rounds operate at higher pressures than .223 Remington, making them ideal for 5.56-chambered, not just .223-chambered, rifles.
- Terminal Performance: As a FMJ round, it is designed for training, not for deep penetration or hunting large game.
- Reliability: Reports indicate high reliability in various rifles with minimal issues with quality brass cases.
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