Name: 20 × 110RB mm
Availability: InStock

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Rim diameter

Bourrelet diameter

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Latin America and the Caribbean

Brazil

Northern America

United States

Southern Europe

Greece

Italy

Spain

Western Europe

Belgium

France

<h2>Synonyms</h2>20 mm Oerlikon S<h2>Armament</h2>Oerlikon Mk 4 (US Navy); Oerlikon Mk 2, 3 and 4 (UK); Polsten (UK).<h2>Development</h2>This was developed by Oerlikon in the 1930s and subsequently adopted by the UK and USA during the Second World War. Several other countries took Oerlikon guns of this chambering into service, and ammunition of this pattern is still widely manufactured.<h2>Description</h2>The bottlenecked cartridge case uses a rebated rim, the rim being very obviously smaller than the head of the case. Cases of steel or brass may be found, although the former is not common. Ignition is by a conventional percussion cap pressed into the base of the case. Projectiles vary from solid shot to explosive and incendiary projectiles with impact fuzes.BELGIUM<h2>Manufacturer</h2>FN HERSTAL SAType: HE-I FN60: Steel shell, forward end filled TNT, rear of cavity filled incendiary mixture;compression-ignition, strikerless nose impact fuze; 122 g; Mv 830 m/sHE-I-T FN62: Steel two-part shell, front section filled HE-Incendiary mixture, rear filled tracer;strikerless nose impact fuze; 120 g; MV 830 m/sHE-I-T-SD FN71: As for HE-I-T FN62 but with a heat relay between tracer and explosive to provideself-destruction; 122 g; MV 830 m/sSAP-I-T FN74: Pointed steel shell, filled incendiary composition and red tracer; 122 g; MV 830 m/sTP FN65A2: HE-I shell body, filled inert; 122 g; MV 830 m/sTP-T FN63A1: HE-I-T shell body, front empty, rear filled tracer; dummy fuze; 120 g; Mv 830 m/sBRAZIL<h2>Manufacturer</h2>Companhia Brasileira de CartuchosType: HE-I M74E1: Steel shell filled Hexolite; nose impact fuze; 100 g; MV 875 m/sHE-I-T M72E1: As for HE-I but two-compartment shell, rear filled red tracer with heat relay forself-destruction; nose impact fuze; 101 g; MV 875 m/sTP: Body of HE-I shell, empty; dummy fuze; 123 g; Mv 810 m/sTP-T: Body of HE-I-T shell with tracer; dummy fuze; 123 g; MV 810 m/sFRANCE<h2>Manufacturer</h2>Giat IndustriesType: HE-I: Steel shell filled 11.5 g Hexal 70/30; impact fuze; 122 g; MV 845 m/sHE-I: As above but fuzed MR21 impact fuzeHE-I: As above but fuzed MR204B impact fuze with self-destruction between 2.5 - 9 secondsHE-I-T: Steel two-section shell, front filled 4.7 g Hexal 70/30, rear filled red tracer; fuzed 16/18 Mle61 impact fuze; 122 g; MV 845 m/sHE-I-T: As above but fuzed MR21 impact fuzeHE-I-T: As above but fuzed MR204B impact fuze with self-destruction between 2.5 - 9 secondsAP-T: Steel pointed shell with rear cavity, part filled inert, remainder filled red tracer; 122 g; MV 845m/sTP: Steel shell, filled inert; plug representing Fuze MR21; 122 g; MV 845 m/sTP: Steel shell, filled inert; plug representing Fuze MR204B; 122 g; MV 845 m/sTP-T: Steel two-section shell, front filled inert, rear section filled red tracer; plug representing FuzeMR21; 122 g; MV 845 m/sTP-T: As above but with plug representing Fuze MR204B; 122 g; MV 845 m/sGREECE<h2>Manufacturer</h2>PYRKAL: Greek Powder & Cartridge CompanyType: HE-I: Steel shell, loaded 11.4 g Hexal; impact fuze 16/18 Mle 61; 122 g; MV 845 m/sHE-I-T: Steel two-section shell, forward section filled 4.7 g Hexal, rear section red tracer; impact fuze16/18 Mle 61; 123 g; MV 845 m/sTP: Body of HE-I shell, empty; dummy fuze; 120 g; Mv 845 m/sTP-T: Body of HE-I-T shell with tracer; dummy fuze; 123 g; MV 845 m/sITALY<h2>Manufacturer</h2>Simmel Difesa SpAType: HE: Steel shell, loaded Hexal or TNT; nose impact fuze Mk 26; 120 g; MV 845 m/sHE-I: As for HE but filled one-third incendiary, two-thirds HEHE-T: Steel two-section shell, forward section filled HE over incendiary mixture, rear section redtracer; nose impact fuze Mk 26; 122 g; MV 845 m/sBL: Target practice round; HE shell body filled inert; dummy fuze; 120 g; MV 845 m/sSPAIN<h2>Manufacturer</h2>EXPAL SAType: HE-T: Steel shell, filled RDX with red tracer 3 seconds nominal; fuzed Mk 26 nose impact fuze;122 g; MV 845 m/sHE-I: Steel shell, filled Hexolite; nose impact fuze Mk 26; 122 g; MV 845 m/sHE-I-T: As for HE-I but two-section shell with rear section filled red tracer burning 3 seconds; noseimpact fuze Mk 26; 122 g; MV 845 m/sAP-T: Pointed projectile, filled RDX, red tracer burning 3 seconds; base fuzed; 122 g; MV 845 m/sTP: HE shell body, filled inert; inert fuze; 122 g; MV 845 m/sTP-T: HE-I-T shell body with front compartment filled inert rear filled red tracer burning 3 seconds;inert fuze; 122 g; MV 845 m/sUNITED STATES OF AMERICA<h2>Manufacturer</h2>Government plantsType: HE: Steel shell filled Pentolite or Tetryl; nose impact fuze Mk 26; 125 g; MV 830 m/sHE-I Mk 3: Steel shell, filled Pentolite and incendiary composition; nose impact fuze Mk 26; 125 g;MV 830 m/sHE-I-T Mk 4: As for HE-I but with tracer in shell base and reduced filling of high explosive; 123 g;MV 830 m/sAP-T Mk 9: Solid steel shot, bored at rear for tracer. 120 g; MV 840 m/sYUGOSLAVIA , FEDERAL REPUBLIC<h2>Manufacturer</h2>Yugoimport SDPRType: HE: Steel shell, filled 12.1 g TNT or RDX/Aluminium; nose impact fuze; 122 g; MV 845 m/sHE-T M62 : Steel two-section shell, front filled 6.1 g TNT or RDX/Aluminium, rear filled red tracer with heat relay for self-destruction after about 3.5 seconds; nose impact fuze; 122 g; MV 845 m/s HE-I: As for HE but filled 12.1 g RDX/Aluminium; nose impact fuze; 122 g; MV 845 m/s HE-I-T: As for HE-T but filled 6.1 g RDX/Aluminium only; nose impact fuze; 122 g; MV 845 m/s AP: Pointed piercing shot with empty balance cavity; 142 g; MV 844 m/s AP-T M63: A pointed piercing shot with tracer compartment at the rear; red trace, burning 3.5 seconds; 142 g; MV 844 m/s; penetration 25 mm armour plate at 100 m AP-I M63: A pointed piercing shot with a rear compartment filled incendiary composition; unfuzed; 142 g; MV 844 m/s; penetration 25 mm of armour plate at 100 m AP-I-T M63: Similar to the AP-I M63 but the rear compartment is partly filled with incendiary composition and the remainder with a 3.5 seconds tracer; 142 g; MV 844 m/s; penetration 25 mm of armour plate at 100 m TP: Body of the HE shell, filled inert; dummy fuze; 122 g; MV 845 m/sTP-T M62 : Body of the HE-T M62 but with the front compartment filled inert; inert fuze; 122 g; MV845 m/s

The bottlenecked cartridge case uses a rebated rim, the rim being very obviously smaller than the head of the case. Cases of steel or brass may be found, although the former is not common.

Ignition is by a conventional percussion cap pressed into the base of the case. Projectiles vary from solid shot to explosive and incendiary projectiles with impact fuzes. This was developed by Oerlikon in the 1930s and subsequently adopted by the UK and USA during the Second World War. Several other countries took Oerlikon guns of this chambering into service, and ammunition of this pattern is still widely manufactured. Compatible platforms include oerlikon Mk 4 (US Navy); Oerlikon Mk 2, 3 and 4 (UK); Polsten (UK).

In over a hundred years of continued operation, Simmel Difesa acquired comprehensive knowledge and expertise in the ammunition business, combining the experience of famous European players into a modern and agile company.
Today, Simmel Difesa supplies medium and large calibre ammunition to more than 40 countries worldwide.
Over the time, the company developed its know-how in all ammunition components, from propellants and explosives to metal parts and fuses. Thanks to its experience, Simmel Difesa is able to optimize the components’ integration in order to conceive first-class products.
Simmel Difesa gained a reputation as a leader in naval ammunition, and is now – after decades of successful cooperation – the preferred supplier for Oto-Melara guns. Its in-house capability to design and manufacture advanced proximity fuses led Simmel Difesa to become a world leader on the air defense ammunition market.
Equipped with a powerful and flexible manufacturing infrastructure, and benefitting from the dedication of its highly skilled workforce and a dependable supply chain, Simmel Difesa is able to quickly respond to its customers’ requirements with reliable and high-performance products.

Simmel difesa

20 × 110RB mm

20 × 110RB mm

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