Name: Cartridge, 105 mm: HEP-T M393 series
Availability: InStock

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Western Asia

Israel

Southern Europe

Greece

Italy

Western Europe

Belgium

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<h2>Armament</h2><p>All 105 mm L7, Rh 105, M68 and CN105F1 series tank guns and South African GT7 tank gun.</p><h2>Development</h2><p>There are two rounds in the 105 mm HEP-T M393 series, the M393A1 standardised in 1965, and the M393A2. They differ mainly in the type of base detonating fuze fitted, the M393A1 has the M534 while the M393A2 has the M578 . The M393A1 also has slightly less explosive filling than the M393A2. Both rounds may be regarded as general purpose anti-armour and high-explosive munitions. A variant of the M393A2 has been chosen as one of the rounds for the 105 mm armed Mobile Gun System (MGS) variant of the US Interim Armoured Vehicle (IAV). While based on the M393A2 it will incorporate components which meet current fuze and insensitive munitions requirements. A variety of contractor-developed solutions are possible, however, the US Army announced in Q1 of 2001 that a metal cartridge case, granular propellant, electrically initiated primer, high explosive projectile and impact initiating fuze would be used to meet the ammunition requirements for the MGS. To partially replace the aged stockpile of M393A2 rounds the US Army proposed spending US$6 million in FY02 for 1,000 rounds of the modified ammunition, with delivery beginning in March 2003.</p><h2>Description</h2><p>The 105 mm HEP-T M393 series rounds are fixed, with the projectile rigidly secured to the brass or steel cartridge case by two crimping rings. The projectiles of the M393A1 and M393A2 have a relatively short ogive and are encircled by two copper drive bands. The projectiles have thin-walled steel bodies filled with Composition A-3 (RDX/Wax 91/9). The M393A1 contains 2.86 kg and the M393A2 2.994 kg. On impact with a target the explosive filling has time to spread over the surface of the target before the base detonating fuze functions. The resultant overpressure causes shockwaves to form throughout the target, close to the detonation, causing internal spalling and damage; there are also secondary fragmentation effects. The base detonating fuze on the M393A1 is the M534 while the M393A2 has the M578 . The projectile base also has a protruding housing for an M12 tracer which is directly ignited by the flash tube of the M86 primer as it extends the full length of the cartridge case. The M12 tracer burns for a minimum of 2.5 seconds. The cartridge case used with the M393 series may be either of the 70:30 brass M150 or steel M150B1, both having an M86 electrical primer in the base. The propellant is a nominal 2.68 kg of single-base M1 packed in a bag. Before loading, the primer is normally protected by a metal clip over the base of the cartridge case. The muzzle velocity for the 105 mm HEP-T M393A1 and M393A2 is 731.5 m/s. Maximum range is 9,510 m. The training round used as the equivalent for the 105 mm HEP-T M393 series is the Cartridge, 105 mm: TP-T M393A1 (not to be confused with the operational round). The TP-T M393A1 projectile has an inert filling but retains the M12 tracer; the steel M150B1 cartridge case is used. A similar and more widely used training round is the Cartridge, 105 mm: TP-T M467. The inert projectile on the TP-T M467 has thicker steel walls than the TP-T M393A1, with a light alloy nose section threaded to the top. Both the TP-T M393A1 and M467 are ballistically matched to the HEP-T M393 series. MECAR SA of Belgium have developed their M1053 HESH-TP-T which is ballistically matched to the M393A2 HEP-T. This round was specifically developed for firing from Leopard 1 MBT tank guns and was the subject of a contract award worth $4 million, involving 10,000 rounds, placed during early 1999. The customer, a member of NATO, was not specified. A drill round used to train loaders in handling the M393 series of HEP-T rounds is the Cartridge, 105 mm: Dummy, M457. This round cannot be fired and has a steel projectile with a steel weight assembled to the rear of the projectile to simulate the weight and handling characteristics of the HEP-T M393 series exactly. The M457 dummy round may also be used to simulate other 105 mm tank rounds.</p><h2>Authorised fuzes</h2><p>M393A1, BD M534; M393A2, BD M578 Equivalent rounds BELGIUM</p><p>BELGIUM</p><h2>Manufacturer</h2><p>MECAR SA</p><p>Type: HESH-T M393A2</p><p>Description: Standard US specifications for M393A2. Brass or steel cases available. Supplied to</p><p>Belgian Army. HESH-TP-T M467 also produced</p><h2>Manufacturer</h2><p>MECAR SA</p><p>Type: HESH-T M1053</p><p>Description: Ballistically matched to HEP-T M393A2. In production</p><p>FRANCE</p><h2>Manufacturer</h2><p>Giat Industries</p><p>Type: HESH-T NR 133</p><p>Description: Equivalent to M393A2. Originally produced by PRB of Belgium. Also known as FSN</p><p>1315-C507. Standard US specifications. No longer in series production by Giat Industries</p><p>GERMANY</p><h2>Manufacturer</h2><p>Rheinmetall DeTec</p><p>Type: HESH DM 512</p><p>Description: Generally similar to M393 series but round weight is 20.9 kg and projectile weight 11.3</p><p>kg. Muzzle velocity is 737 m/s and chamber pressure 1,800 bar. Training round is HESH-P DM 78</p><p>GREECE</p><h2>Manufacturer</h2><p>PYRKAL: Greek Powder & Cartridge Company</p><p>Type: TP-T M467</p><p>Description: Standard US specifications</p><p>ISRAEL</p><h2>Manufacturer</h2><p>Israel Military Industries ( IMI ) Type: HESH-T M156</p><p>Description: Identical to HEP-T M393 in dimensions and ballistic performance but with changes to suit</p><p>local production methods. Propellant is 2.8 kg of 105-7T-M6 ignited by a M433/1 electrical primer. The</p><p>base detonating fuze is a L-56. The tracer element burns for a minimum of 6 seconds</p><p>ITALY</p><h2>Manufacturer</h2><p>Simmel Difesa SpA</p><p>Type: HEP-T</p><p>Description: Standard US specifications</p>

The 105 mm HEP-T M393 series rounds are fixed, with the projectile rigidly secured to the brass or steel cartridge case by two crimping rings. The projectiles of the M393A1 and M393A2 have a relatively short ogive and are encircled by two copper drive bands. The projectiles have thin-walled steel bodies filled with Composition A-3 (RDX/Wax 91/9). The M393A1 contains 2.86 kg and the M393A2 2.994 kg. On impact with a target the explosive filling has time to spread over the surface of the target before the base detonating fuze functions. The resultant overpressure causes shockwaves to form throughout the target, close to the detonation, causing internal spalling and damage; there are also secondary fragmentation effects. The base detonating fuze on the M393A1 is the M534 while the M393A2 has the M578. The projectile base also has a protruding housing for an M12 tracer which is directly ignited by the flash tube of the M86 primer as it extends the full length of the cartridge case. The M12 tracer burns for a minimum of 2.5 seconds. The cartridge case used with the M393 series may be either of the 70:30 brass M150 or steel M150B1, both having an M86 electrical primer in the base. The propellant is a nominal 2.68 kg of single-base M1 packed in a bag. Before loading, the primer is normally protected by a metal clip over the base of the cartridge case.

The muzzle velocity for the 105 mm HEP-T M393A1 and M393A2 is 731.5 m/s. Maximum range is 9,510 m. The training round used as the equivalent for the 105 mm HEP-T M393 series is the Cartridge, 105 mm: TP-T M393A1 (not to be confused with the operational round). The TP-T M393A1 projectile has an inert filling but retains the M12 tracer; the steel M150B1 cartridge case is used. A similar and more widely used training round is the Cartridge, 105 mm: TP-T M467. The inert projectile on the TP-T M467 has thicker steel walls than the TP-T M393A1, with a light alloy nose section threaded to the top. Both the TP-T M393A1 and M467 are ballistically matched to the HEP-T M393 series. MECAR SA of Belgium have developed their M1053 HESH-TP-T which is ballistically matched to the M393A2 HEP-T.

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Cartridge, 105 mm: HEP-T M393 series

Cartridge, 105 mm: HEP-T M393 series

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