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NAME – 40x46mm M433 High Explosive Dual Purpose

NAME (COMMON) – M433 HEDP

CALIBER – 40x46mmSR

TYPE – Low velocity, ground burst, high explosive, fragmentation, armor piercing

YEAR OF INTRODUCTION – 1971

COUNTRY OF ORIGIN – USA

IDENTIFYING COLOR CODE – Green cartridge case with yellow ink markings, Olive drab projectile body with yellow ink markings, Gold rounded ogive

CASE TYPE – M118 Semi-rimmed straight walled

CARTRIDGE LENGTH – 10.3 cm (4.06 in)

CASING LENGTH – 46mm (1.811 in)

CASE HEAD DIAMETER – 41.097 mm (1.618 in)

CASE RIM DIAMETER – 43.54 mm (1.714 in)

PROJECTILE TYPE – Round-nosed aluminum-bodied projectile with internally scored (coined) fragmentation body with copper shaped charge cone

PROJECTILE DIAMETER – 41.15 mm (1.620 in) at rotating band

PROJECTILE WEIGHT – 0.18 kg (6.35 oz)

POWDER WEIGHT – 0.33 g (5.09 grains) M9 double-base flake mortar powder

FILLER – Composition A5

FILLER WEIGHT – 0.045 kg (1.59 oz)

FUZE TYPE – M550 point initiating, base detonating with Spitback element

CASING WEIGHT – 0.050 kg (1.78 oz)

TOTAL ROUND WEIGHT – 0.230 kg (8.11 oz)

MUZZLE VELOCITY – 75 m/s (247 fps)

NOMINAL BARREL LENGTH – 35.6 cm (14 in)

MINIMUM (ARMING) RANGE – 14 to 27 m (45 to 90 feet)

MAXIMUM RANGE – 400 m (437 yards)

EFFECT – Blast and fragmentation at impact point with armor piercing jet

AREA OF EFFECT – 5 m (5.5 yards) burst radius

ARMOR PENETRATION – 5.1 cm (2 in) steel

MANUFACTURER –

STATUS – Standard issue

SERVICE – US Military and Allies

     This round was developed under the designation XM434E1 HEDP

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