Soviet/Russian 152mm 3-OF-44 HE Projectile

Overview

The 3-OF-44 is a 152mm high-explosive fragmentation (HE-FRAG) projectile developed to provide enhanced performance characteristics for Soviet/Russian self-propelled and towed artillery systems. Representing a parallel development to the 3-OF-39, the 3-OF-44 incorporates design features optimized for specific gun systems and operational requirements. Like its counterpart, this large-caliber projectile delivers devastating area effects through the combination of high-explosive blast and steel casing fragmentation. The 3-OF-44 is employed in separate-loading configuration and has seen widespread distribution to Russian forces and numerous export customers, seeing extensive combat use in contemporary conflicts.

Country/Bloc of Origin

• Country: Soviet Union (USSR) / Russian Federation
• Developer: Soviet artillery ammunition design bureaus under GRAU (Main Missile and Artillery Directorate) coordination
• Primary Manufacturers: Multiple Soviet/Russian ammunition plants
• Development Period: 1980s
• Service Entry: Late 1980s
• International Distribution: Exported to Warsaw Pact nations, Commonwealth of Independent States, and various client states; licensed production in several countries

Ordnance Class

• Type: Artillery projectile; high-explosive fragmentation (HE-FRAG)
• Primary Role: Area suppression; destruction of personnel, field fortifications, command posts, supply points, and soft-skinned vehicles
• Ammunition Configuration: Separate-loading (projectile, propellant charge, and primer as independent components)
• Delivery Systems: 152mm gun-howitzers and self-propelled guns
• Effect Type: Combined high-explosive blast and fragmentation

Ordnance Family/Nomenclature

GRAU Designation System:

• 3-OF-44: Standard HE-FRAG projectile
  • “3” = Artillery ammunition category
  • “OF” = Oskolochno-Fugasniy (Fragmentation-High Explosive)
  • “44” = Development/model designation

Related 152mm HE Projectiles (Comparison):

• 3-OF-25: Earlier HE-FRAG projectile (D-20 system era)
• 3-OF-29: HE-FRAG for 2S3 Akatsiya
• 3-OF-39: Parallel HE-FRAG design (Giatsint systems)
• 3-OF-45: Base-bleed extended range variant
• 3-OF-64: Modern HE-FRAG for 2S19 Msta
• 3-OF-72: Long-range HE-FRAG with improved ballistics
• 3-OF-83: Enhanced fragmentation variant

Complete Round Components: When employed, the 3-OF-44 is part of a separate-loading assembly:

• Projectile: 3-OF-44 HE-FRAG
• Propellant Charges: 4Zh25 or 4Zh29 series (variable charge bags)
• Primer: KV-2, KV-4, or equivalent percussion primer

Compatible Weapons Systems:

• 2S19 Msta-S (self-propelled howitzer)
• 2A65 Msta-B (towed howitzer)
• 2S35 Koalitsiya-SV (new generation SPH)
• Other 152mm gun systems accepting standard separate-loading ammunition

Hazards

Hazard Classification:

• UN Hazard Class: 1.1D (Mass explosion hazard)
• Primary Effects: High-explosive blast and fragmentation

Explosive Hazards:

Blast Effect:

• Substantial explosive fill (approximately 6.5-8 kg depending on explosive type)
• TNT, A-IX-2 (RDX/aluminum), or mixed explosive fills
• Significant overpressure at detonation point
• Effective blast radius: 15-25 meters

Fragmentation Hazards:

• Heavy steel casing produces natural fragmentation
• Thousands of high-velocity fragments projected radially
• Fragment velocities exceed 1,000 m/s at point of detonation
• Lethal fragment radius: approximately 40-50 meters
• Casualty-producing fragments effective to 100+ meters
• Significant fragments may travel 300+ meters

Kill Zone Parameters:

• Lethal radius (50% casualties): 40-50 meters
• Casualty radius (light injuries): 70-100 meters
• Fragment danger zone: 300+ meters
• Effects enhanced in urban/confined environments

Fuze Hazards:

• Compatible with multiple fuze types (PD, delay, proximity, electronic multi-function)
• Impact fuzes arm during projectile flight
• Armed fuzes are extremely sensitive to disturbance
• Electronic fuzes contain batteries and sensitive electronics
• Some fuzes may incorporate anti-handling mechanisms

UXO (Unexploded Ordnance) Considerations:

• Artillery projectiles have measurable dud rates (2-10% typical)
• Fuze failures may leave armed or partially armed projectiles
• Impact with soft media (mud, snow, water, sand) may prevent function
• Oblique strikes may defeat point-detonating fuzes
• UXO may be buried deeply, complicating detection and clearance
• Environmental degradation increases hazard over time
• Corroded fuzes may become more sensitive, not less

Storage and Transportation:

• Projectiles normally stored unfuzed
• Fuzed projectiles require extreme care
• Propellant charges present separate fire hazard
• Sympathetic detonation possible with adjacent rounds

Key Identification Features

Physical Dimensions:

• Projectile Length: Approximately 680-720mm (26.8-28.3 inches)
• Body Diameter: 152mm (5.98 inches)
• Projectile Weight: Approximately 43-46 kg (95-101 lbs)
• Explosive Fill Weight: 6.5-8 kg (14.3-17.6 lbs)
• Wall Thickness: Approximately 10-15mm (steel casing)

External Configuration (nose to base):

1. Fuze Well: Female threaded cavity at nose for fuze installation
   • Shipping plug installed when unfuzed
   • Standard Soviet thread specifications
2. Ogive (Nose Section):
   • Streamlined pointed shape
   • Approximately 2-2.5 calibers in length
   • Houses fuze booster cavity
3. Bourrelet:
   • Machined bearing surface near forward portion
   • Full diameter contact with bore
   • Ensures proper bore riding during launch
4. Body (Main Section):
   • Cylindrical steel casing
   • Contains main explosive fill
   • Wall thickness designed for optimal fragmentation
5. Rotating Band:
   • Copper or gilding metal
   • Located in lower third of body
   • Engages barrel rifling
6. Base:
   • Flat or boat-tailed design
   • May include base marking pad
   • Base plug seals explosive cavity

Color Coding (Soviet/Russian Standard):

• Body Color: Olive drab (OD green) or gray-green overall
• Markings: White or yellow stenciled text
• Indicating Bands:
  • Yellow band = HE content
  • Additional bands may indicate specific fill type
• Rotating Band: Copper (natural metal color)
• Base: May be painted or natural metal

Distinctive Markings:

• “3-OF-44” designation prominently stenciled
• Caliber: “152”
• Lot number (factory code prefix + serial + year)
• Manufacturing year (2-digit typically)
• Weight class marking (cyrillic letter)
• Explosive fill type code
• Factory inspection stamps
• Temperature conditioning range (if applicable)

Comparison with 3-OF-39: The 3-OF-44 and 3-OF-39 are visually similar but distinguishable:

• Ogive geometry: Subtle differences in nose shape/length
• Body proportions: Minor variations in cylindrical section length
• Markings: Definitive—”3-OF-39″ vs. “3-OF-44” clearly stenciled
• Weight: Similar but not identical
• Both use same rotating band configuration and color scheme

Field Identification Tips:

• Check stenciled designation first (most reliable)
• Compare ogive profile if designation obscured
• Measure/estimate body length
• Note any lot markings that might indicate projectile type
• Rotating band condition indicates fired (engraved) vs. unfired (smooth)

Fuzing Mechanisms

Compatible Fuze Types:

Point-Detonating Impact Fuzes:

• RGM-2: Standard impact fuze, superquick function
• V-90: Impact fuze with selectable superquick/delay
• V-429: Multi-option impact fuze
• V-429E: Enhanced impact fuze

Proximity/VT Fuzes:

• AR-5: Radio proximity fuze for airburst
• AR-30: Improved proximity fuze
• 9E231: Electronic multi-mode fuze

Multi-Function Electronic Fuzes:

• 3V34: Programmable fuze (impact, delay, time, proximity modes)
• 3V35: Enhanced programmable fuze
• 9E241: Advanced electronic fuze system

Fuze Operating Modes:

Superquick (SQ) / Point Detonating:

• Instantaneous detonation on target contact
• Maximizes surface-level fragmentation effect
• Optimal against personnel in open terrain

Delay:

• Brief delay (0.05-0.15 seconds) allows partial penetration
• Detonation inside or beneath surface/structure
• Effective against field fortifications, bunkers, buildings

Time:

• Mechanical or electronic timer initiates detonation
• Set before firing based on calculated flight time
• Airburst over target area

Proximity:

• Radio-frequency sensor detects ground/target
• Initiates airburst at optimum height (typically 10-20m)
• Maximizes fragment distribution over troops in defilade

Arming Sequence (Typical Impact Fuze):

1. Pre-Launch: Fuze installed in projectile, safety mechanisms engaged
2. Firing: Propellant ignition accelerates projectile
3. Setback: Acceleration forces release first safety
4. Spin: Barrel rifling imparts rotation; centrifugal force releases rotor safety
5. Bore Exit: Environmental sensors may confirm muzzle exit
6. Arm Distance: After 300-600 meters, fuze reaches armed state
7. Terminal: Impact drives striker into detonator, initiating explosive train

Detonation Chain:

• Fuze detonator → Booster charge → Main explosive fill

Anti-Handling/Anti-Disturbance:

• Some fuze types incorporate anti-disturbance features
• Designed to detonate if UXO is moved or tampered
• May use tilt-sensitive elements, trembler switches, or tension-release
• Cannot be determined externally in most cases

History of Development and Use

Development Context: The 3-OF-44 was developed during the 1980s as part of the Soviet Union’s continuous modernization of artillery ammunition. While the 3-OF-39 was optimized for the long-range Giatsint gun systems, the 3-OF-44 was designed to complement and potentially succeed earlier projectiles for the Msta-series gun-howitzers. Soviet artillery doctrine demanded enormous quantities of conventional ammunition for massed fires, driving continuous improvement in projectile performance, reliability, and manufacturability.

Design Objectives:

• Enhanced fragmentation characteristics
• Improved ballistic consistency (accuracy)
• Compatibility with multiple 152mm systems
• Reliable function across temperature extremes
• Cost-effective mass production

Development Timeline:

• Early 1980s: Design work initiated
• Mid-1980s: Prototype testing
• Late 1980s: Acceptance and initial production
• 1990s: Full-scale production and distribution
• 2000s-present: Continued production, combat employment

Relationship to Other Projectiles: The Soviet/Russian 152mm HE-FRAG family evolved continuously:

• 3-OF-25 → 3-OF-29 → 3-OF-39/3-OF-44 → 3-OF-64/3-OF-72

Each generation incorporated lessons learned and manufacturing improvements while maintaining broad compatibility with existing gun systems.

Combat History:

Chechen Wars (1994-1996, 1999-2009):

• Russian forces employed 152mm artillery extensively
• Urban operations in Grozny featured heavy artillery bombardment
• Both 3-OF-39 and 3-OF-44 series projectiles consumed in quantity

Syrian Civil War (2011-present):

• Russian expeditionary forces and Syrian Arab Army use 152mm systems
• Reported use against various opposition positions
• Combined with modern fire control for improved accuracy

Russo-Ukrainian War (2014-present):

• Massive artillery employment by all parties
• 152mm remains the predominant caliber for Russian, LPR/DPR, and Ukrainian forces (prior to NATO 155mm supply)
• Documented extensive consumption of 152mm ammunition including 3-OF-44 series
• Artillery has proven decisive in positional warfare phases

Global Proliferation: The 3-OF-44 and related 152mm ammunition has been distributed to:

• Former Soviet States: Belarus, Kazakhstan, Armenia, Azerbaijan, etc.
• Former Warsaw Pact: Poland, Bulgaria, Romania, Czech Republic, etc.
• Middle East: Syria, Iraq, Libya, Algeria, Egypt
• South Asia: India (significant user)
• Africa: Angola, Ethiopia, and others
• Latin America: Cuba, Nicaragua

Current Status:

• Active production in Russian Federation
• Production capacity in Ukraine (pre-2022), Bulgaria, China, India
• Large stockpiles maintained globally
• Front-line service in ongoing conflicts
• Consumption rates in Russo-Ukrainian War have depleted some stockpiles

Technical Specifications

Specification	Value
Caliber	152mm (152.4mm actual)
Projectile Length	680-720mm
Projectile Weight	43-46 kg
Explosive Type	TNT, A-IX-2, or TNT/RDX mixture
Explosive Weight	6.5-8 kg
Casing Material	Forged steel
Casing Thickness	10-15mm
Rotating Band Material	Copper or gilding metal
Fuze Well Thread	Soviet standard metric
Fragment Count	3,000+ effective fragments
Lethal Radius	40-50 meters
Casualty Radius	70-100 meters
Operating Temperature	-40°C to +50°C
Shelf Life	20+ years (proper storage)

Propellant Charge System:

• Variable charge system allows range adjustment
• Charge weights from ~2 kg (charge 1) to ~10 kg (full charge)
• Typically 6-8 propellant charge options

Ballistic Performance (System Dependent):

Gun System	Maximum Range	Muzzle Velocity (Full Charge)
2S19 Msta-S	~24,700m	~810 m/s
2A65 Msta-B	~24,700m	~810 m/s
Extended Range (Base-Bleed variant)	~30,000m+	Varies

Fire Rate (System Dependent):

• 2S19 Msta-S: 7-8 rounds/minute (maximum)
• Sustained: 2-3 rounds/minute

Frequently Asked Questions

Q: What is the primary difference between the 3-OF-44 and the 3-OF-39? A: The 3-OF-44 and 3-OF-39 are both 152mm HE-FRAG projectiles with broadly similar terminal effects, but they represent parallel development lines with subtle differences in design optimization. The 3-OF-39 was developed primarily for the longer-range 2A36 Giatsint gun system (28+ km range), while the 3-OF-44 was optimized for the Msta family of gun-howitzers. Differences include ogive geometry (affecting aerodynamic performance), wall thickness distribution (affecting fragmentation pattern), and precise weight specifications. In practical terms, both deliver comparable destructive effects, and the choice between them in inventory is often determined by manufacturing source and supply logistics rather than tactical preference. Field identification relies primarily on the stenciled designation.

Q: Can the 3-OF-44 be used in older Soviet 152mm systems like the D-20? A: Generally yes, though with caveats. The 152mm separate-loading ammunition family was designed with broad compatibility in mind. The 3-OF-44 will physically chamber in systems like the D-20 gun-howitzer and can be fired with appropriate propellant charges. However, older gun systems may not achieve the full performance envelope of the projectile due to differences in chamber pressure ratings, barrel length, and fire control capability. Additionally, maximum ranges may be limited by the gun’s elevation limits. Modern electronic fuzes may not be compatible with older fire control systems that lack programmable fuze setters. In practice, units are issued ammunition appropriate to their specific systems, and mixed-caliber/mixed-system employment is logistically avoided where possible.

Q: How does fragmentation performance of the 3-OF-44 compare to modern Western 155mm projectiles? A: The 3-OF-44 and comparable Western 155mm projectiles (US M795, German DM121) deliver broadly similar effects. The Western 155mm rounds are slightly larger caliber with somewhat more explosive fill (approximately 10-11 kg vs. 6.5-8 kg), producing a somewhat larger lethal area. However, modern Western designs increasingly incorporate pre-formed or controlled fragmentation features for more consistent effects, while traditional Soviet designs relied on natural fragmentation from the forged steel casing. The practical difference in anti-personnel effectiveness is less dramatic than the explosive weight difference suggests, as fragmentation pattern is as important as total fragment count. Both represent devastating weapons against unprotected personnel.

Q: What role does the rotating band play, and why is it made of copper? A: The rotating band serves three critical functions: obturation (sealing propellant gases behind the projectile), engraving (engaging the barrel’s rifling to impart stabilizing spin), and centering (keeping the projectile aligned in the bore). Copper (or gilding metal, a copper-zinc alloy) is used because it is soft enough to engrave into the rifling without excessive resistance or barrel wear, yet strong enough to withstand the forces involved. The engraving process leaves distinctive parallel marks on the band—the “rifling signature”—which can identify fired projectiles and even match them to specific gun barrels. For UXO identification, a smooth band indicates an unfired projectile, while engraved markings confirm it was fired.

Q: What makes artillery projectiles fail to detonate and become UXO? A: Multiple failure modes exist: (1) Fuze malfunction—mechanical failures, manufacturing defects, or component breakage during firing; (2) Insufficient impact force—soft targets (deep mud, snow, loose sand, water) may not decelerate the projectile enough to function impact fuzes; (3) Oblique impact—shallow angle strikes may fail to trigger point-detonating elements; (4) Arm failure—projectiles landing before completing minimum arming distance; (5) Environmental factors—extreme cold can cause lubricant failure in mechanical components; (6) Quality control—mass production inevitably introduces defective items. Dud rates vary from 2-10% depending on ammunition quality, fuze type, and conditions. In intensive artillery campaigns, this creates significant UXO contamination requiring extensive post-conflict clearance.

Q: How are electronic multi-function fuzes like the 3V34 programmed? A: Electronic multi-function fuzes are programmed via an inductive fuze setter integrated into the loading system of modern self-propelled guns like the 2S19 Msta-S. The fire control computer calculates required fuze settings based on target data, range, and desired effect (impact, delay, time, or proximity burst). This data is transmitted inductively (without physical contact) to the fuze as the round is loaded or just before firing. The fuze’s onboard electronics store the programming and execute the selected function during flight. This allows crews to rapidly change ammunition effects without physically adjusting fuzes—a significant tactical advantage over manual-set mechanical fuzes. Older towed guns may lack this capability and require manual fuze setting.

Q: What is the difference between “superquick” and “delay” fuze settings? A: Superquick (also called “point detonating” or “instantaneous”) causes detonation the moment the fuze contacts the target—within microseconds. This maximizes surface-level blast and projects fragments horizontally, optimal against personnel in the open. Delay introduces a brief pause (typically 0.05-0.15 seconds) between impact and detonation, allowing the projectile to penetrate the target surface before exploding. This is effective against field fortifications, buildings, and bunkers—the projectile breaks through the protective cover before detonating inside or beneath. Selecting the appropriate mode is a key tactical decision; using superquick against fortified positions wastes much of the projectile’s effect on the exterior, while delay against troops in the open may bury the blast.

Q: Why do Russian forces continue to rely heavily on 152mm artillery when NATO has standardized on 155mm? A: The 152mm caliber represents an enormous investment in guns, ammunition stockpiles, production infrastructure, and trained personnel that cannot be quickly replaced. Russia and former Soviet states possess thousands of 152mm systems and billions of rounds of ammunition accumulated over decades. Converting to 155mm would require replacing all this equipment and ammunition—an impractical expense. Additionally, 152mm performance is broadly comparable to 155mm; the slight difference in caliber does not represent a decisive disadvantage. Russia has chosen to modernize within the 152mm standard (improved projectiles, modern fuzes, enhanced gun systems) rather than adopt NATO calibers. The Russo-Ukrainian War has demonstrated that ammunition quantity and artillery volume of fire remain critical factors where 152mm is entirely adequate.

Q: How should EOD personnel approach a suspected 3-OF-44 UXO? A: Approach with extreme caution following established UXO protocols: (1) Identify at maximum safe distance using optics; confirm it is a 152mm projectile versus other ordnance. (2) Assess fuze condition—is a fuze installed? Is it intact or damaged? (3) Note position—deeply buried, partially exposed, or surface-lying affects risk. (4) Check rotating band—engraved marks confirm it was fired; smooth band indicates potentially unfired. (5) Never attempt to move, fuze, or disarm the projectile. (6) Mark location and establish cordon. (7) Report for disposal by qualified explosive ordnance disposal specialists. The assumption must always be that the fuze is armed and possibly anti-handling equipped. Even unfuzed projectiles contain explosive fill sensitive to shock and should only be handled by trained EOD personnel with appropriate equipment.

SAFETY NOTICE: This lesson is intended for educational and training purposes. All ordnance should be considered dangerous until proven safe by qualified personnel. Unexploded ordnance should never be handled by untrained individuals—report findings to military or law enforcement authorities.