Description

57mm Ammunition – Overview

57mm caliber ammunition is used primarily in naval guns, anti-aircraft systems, and infantry support cannons. It is a high-velocity, high-explosive round capable of engaging air, ground, and sea-based threats.

Typical applications:

• Anti-aircraft defense

• Naval shipborne cannons

• Infantry support weapons (historically)

• Modern autocannons on wheeled/turreted platforms

 Ammunition Type (from Image)

The image shows cross-sections of two 57mm high-explosive projectiles, allowing a view into their internal structure.

 Internal Components (Cutaway View)

1. Projectile tip – usually hardened or fused (for impact or proximity detonation)

2. Explosive charge – visible as black granular or pressed powder (likely TNT, RDX, or similar)

3. Casing – brass or steel shell holding the explosive charge

4. Driving band – copper/brass ring to engage barrel rifling

5. Propellant charge – visible in the base of the shell (for launching the projectile)

6. Fuze – mechanical or electronic (top section), triggers explosion on impact or near target

Common Variants of 57mm Rounds

1. HE (High-Explosive)

• Purpose: Blast effect against soft targets and aircraft

• Detonation: Impact or proximity

• Common in: Bofors 57mm naval guns, S-60 AA guns

• Lethal radius: 10–15 meters

2. HE-T (High-Explosive Tracer)

• Includes a visible tracer element in the rear

• Allows gunners to track flight path, correct aim

• Still has explosive payload

3. AP-T (Armor-Piercing Tracer)

• Designed to penetrate lightly armored vehicles

• May include small explosive or incendiary element

• Often has steel or tungsten core

4. Proximity Fuzed Rounds (Naval Use)

• Explodes near target using radar or IR sensor

• Common in modern shipborne 57mm autocannons (e.g., Bofors 57mm Mk 110)