Winchester M193 5.56 55gr Fmj 20/1000

Winchester M193 5.56 NATO 55-grain Full Metal Jacket ammunition is the standard rifle round for AR-15 platforms and 5.56 NATO-chambered rifles. This case of 1,000 rounds (twenty 50-round boxes) delivers consistent performance for high-volume training, qualification, and practice shooting where accurate ballistics and reliable function are non-negotiable.

The 55-grain FMJ load is optimized for 1:12 and faster rifle twists and generates approximately 3,240 feet per second from a 20-inch barrel. This velocity produces predictable energy delivery at intermediate ranges (out to 300 yards) with minimal wind deflection compared to heavier loadings. Full Metal Jacket construction ensures reliable feeding through semi-automatic and automatic action types while minimizing fouling in suppressed and unsuppressed configurations. Case quantity packaging (1,000 rounds per case) reduces per-round cost and logistics for operators managing ammunition at scale.

This round is suitable for law enforcement training cycles, military qualification events, combat arms courses, and extended range sessions where shooters require predictable ballistics and consistent primer ignition across large volumes. Winchester's manufacturing tolerances and quality control make the M193 load a reference standard in the 5.56 NATO category. It does not meet barrier-blind or barrier-penetration requirements, making it appropriate for training and sport use rather than duty carry applications.

The M193 specification originated as the original NATO 5.56mm service round and remains the benchmark against which other 5.56 loads are tested. Case ammunition purchases provide economy for organizations and serious shooters who maintain dedicated shooting schedules and require stockpile management of verified, field-proven ammunition.