Projectile OFD MKM-DV ⇒ HE ER-BB MKM (analogue) 
Contents
Projectile OFD MKM-DV ⇒ HE ER-BB MKM
OFD MKM-DV, also known as ER-BB MKM, is a 155 mm high-explosive fragmentation projectile from a Slovak manufacturer, one of a whole series of 155 mm munitions with improved aerodynamics. Manufacturers: MSM Group (Slovakia), Czechoslovak Group CSG (Czech Republic), Polska Grupa Zbrojeniowa (Poland), Ukrainian Armor.
The DV (BB) designation means the projectile has a base-bleed generator.
OFD MKM-DV (alternative name ER-BB MKM) is an extended-range projectile with a tapered rear section of the “boat tail” type, filled with TNT or a TNT/RDX mix in a ratio of roughly 50/50.
It is used to partially or completely destroy targets and to slow the advance of enemy forces. It has a large blast effect (10 kg of TNT) but a reduced number of fragments because of the thin body walls. It is therefore intended first of all for eliminating stationary targets and places with a high concentration of enemy troops and military equipment.
The projectile has a base-bleed unit (base-bleed generator) screwed onto the lower part of the body. It extends the firing range to 40,200 meters when fired from a 52-caliber gun.
Technical specifications
Maximum range, 52 caliber, with TC-F propellant charge:
- 4th charge: 23.8 km
- 5th charge: 36.6 km
- 6th charge: 40.2 km
- Mass with fuze: 43.55 kg
- Length with fuze: 825.5–828.7 mm
- Amount of explosive: 10 kg
- Operating temperature: −50 °C / +50 °C
Usage notes
The OFD MKM-DV projectile (also known as ER-BB MKM) is described in Kropyva for the AHS Krab, with TC-F charges.
It is not listed for the 2S22 Bohdana gun, but the calculations are identical to those for the Polish Krab self-propelled gun.
Note: the modular TC-F propellant charges are the most powerful in the range of propellant charges of the BMCS bi-modular charging system.
Accordingly, if modules M232, M232A1, TC-F, DM72, DM92 or TCME 100 are chosen, expect the round to fall short.
For the Bohdana, the projectile of this series that is described is ERFB-BB. The letters FB indicate stabilizing vanes along the length of the projectile, so its ballistics and range will be different.
The manufacturer, MSM Group, changed the names of its projectiles three times in a short period and also licensed production in the Czech Republic, Poland and Ukraine, where the names (and, in Poland, the projectile length) were changed as well. Hence the confusion.
For example, the ERFB BT MKM projectile became ERFB BT VMK in Poland and is 50 mm shorter, because it did not fit the Korean K9 guns the country had bought, and so on. As a result, the markings on the projectile and the designations in Kropyva differ in places.
Range may differ somewhat, but the ballistics are the same.
Oleh Syrota (Georgich©) for the Armed Forces of Ukraine /
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