Profile
- Origin
- Soviet Union
- Built by
- Soviet munitions industry
- Type
- 85 mm AP-T complete round
- Service note
- World War II and postwar Soviet 85 mm ammunition family
- Unit cost
- Not publicly documented
Munitions
85 mm BR-365K AP round
Also known as
- 53-BR-365K
- 53-БР-365К
- 85 mm BR-365K
- 85 mm BR-365K AP-T round
- 85 mm AP-T BR-365K
- UBR-365K
- 53-UBR-365K
- 53-УБР-365К
- UBR-365K AP-T round
- UBZR-365K
BR-365K is the sharp-nosed Soviet 85 mm armor-piercing high-explosive tracer projectile used in the UBR-365K fixed round family for D-44, ZiS-S-53, D-5, and related 85 mm guns. Tank Archives lists BR-365K in D-44 ballistic tables at 800 m/s, WW2 Equipment Data identifies the complete round, fuze, filler, and firing weapons, while METIS and Milzo add designation and construction details.
Profile / Specs
Specifications
- Caliber
- 85 mm
- Complete round designation
- UBR-365K / 53-UBR-365K
- Projectile designation
- BR-365K / 53-BR-365K
- Round type
- Fixed AP-T / APHE-T complete round
- Projectile construction
- Spin-stabilized steel projectile with short ogive and twin copper driving bands
- Muzzle velocity
- 800 m/s
- Dispersion at 1,000 m
- 0.3 x 0.4 m
- Complete round weight
- 15.87 kg in WW2 Equipment Data; 16 kg in Milzo
- Projectile weight
- 9.21 kg in WW2 Equipment Data; 9.266 kg in Milzo
- Explosive filler
- RDX/aluminum filler; Milzo lists a 48 g bursting charge
- Propellant weight
- 2.48 kg in WW2 Equipment Data; 2.6 kg in Milzo
- Fuze
- MD-8
- Cartridge case length
- About 822 mm complete round length in Milzo
- Target set
- Tanks, armored trains, armored or reinforced concrete structures
Designation And Construction
Public sources use both projectile and complete-round naming. This page keeps BR-365K as the projectile identity while recording UBR-365K as the fixed round assembled around it.
Projectile identity
METIS identifies 53-BR-365K / BR-365K as an 85 mm spin-stabilized APHE-T projectile with an ogival nose, no ballistic or penetrating cap, and an MD-8 base fuze.
Source: Munition, projectile, 53-BR-365K | METIS.
Complete round
WW2 Equipment Data identifies UBR-365K as the fixed AP-T complete round and notes a related UBZR-365K marking found with the same BR-365K projectile and MD-8 fuze.
Source: WW2 Equipment Data Soviet Explosive Ordnance - 85mm and 100mm Projectiles.
Round construction
Milzo describes the projectile as seated in the cartridge case by a crimping ring, with twin copper driving bands, a small base charge, MD-8 fuze, tracer assembly, and roughly 800 m/s muzzle velocity.
Source: Milzo: 85 mm AP-T BR-365 and BR-365K.
Variants
BR-365K is part of a Soviet 85 mm armor-piercing designation set that separates blunt-nosed APBC, sharp-nosed AP-T/APHE-T, APCR/HVAP, and later APCBC projectiles.
| Variant | Configuration | Designation notes |
|---|---|---|
 | Blunt-nosed APBC / APHE-T projectile | WW2 Equipment Data treats UBR-365 as a same-weapons variant using the flat-nosed BR-365 projectile, while Tank Archives lists BR-365 separately from BR-365K in the D-44 tables. Sources: WW2 Equipment Data Soviet Explosive Ordnance - 85mm and 100mm Projectiles, Tank Archives: D-44 Ballistic Tables |
| 85 mm APCR / HVAP-T projectile | Tank Archives lists BR-365P as a distinct APCR projectile at 1050 m/s, faster than the 800 m/s BR-365K AP round but less precise at 1,000 m. Sources: Tank Archives: D-44 Ballistic Tables |
 | Later 85 mm APCBC projectile | Tank Archives places BR-367 in the same D-44 ballistic-table group and describes it as close to BR-365 but slightly faster and more precise. Sources: Tank Archives: D-44 Ballistic Tables |
 | Later 85 mm APCR projectile | Tank Archives lists BR-367P and BR-367PZh as later 1020 m/s APCR projectiles in the same D-44 reference set. Sources: Tank Archives: D-44 Ballistic Tables |
Firing Guns
Tank Archives and WW2 Equipment Data place BR-365K in the Soviet 85 mm gun family used by the D-44, and WW2 Equipment Data also names the ZiS-S-53 and D-5T tank guns used in T-34/85-family service.
| Firing weapon | Weapon type | Firing evidence |
|---|---|---|
 | 85 mm divisional gun | Tank Archives' D-44 ballistic tables list the sharp-tipped BR-365K AP round in the gun's ammunition set, and WW2 Equipment Data identifies the same UBR-365K complete round with an MD-8 fuze. Sources: Tank Archives: D-44 Ballistic Tables, WW2 Equipment Data Soviet Explosive Ordnance - 85mm and 100mm Projectiles |
 | ZiS-S-53 / D-5T 85 mm tank-gun platform | WW2 Equipment Data names the M1943 D-5T85 and M1944 ZiS-S53 tank guns among weapons firing UBR-365K, making the T-34/85 family a sourced compatibility context for the round. Sources: WW2 Equipment Data Soviet Explosive Ordnance - 85mm and 100mm Projectiles |
Ballistic And Compatibility Notes
The useful sourced context is compatibility and ballistic behavior across the Soviet 85 mm gun family. The references do not prove this exact round was fired in any named modern conflict.
| Context | Catalog link | Source-backed note |
|---|---|---|
| D-44 divisional gun | | Tank Archives lists BR-365K in D-44 ballistic tables with 800 m/s muzzle velocity and 0.3 x 0.4 m dispersion at 1,000 m. |
| ZiS-S-53 / D-5T tank guns | | WW2 Equipment Data names the M1943 D-5T85 and M1944 ZiS-S53 among weapons firing UBR-365K, tying the round to the 85 mm T-34/85 gun family. |
| Self-propelled and anti-aircraft lineage | Unlinked | WW2 Equipment Data also lists D5-S85/D5-S85A self-propelled guns and the M1939 85 mm anti-aircraft gun in the same firing-weapons set. |
| Same-family rounds | | WW2 Equipment Data describes UBR-365 as a flat-nosed same-weapons variant of the illustrated UBR-365K round. |
Source labels used here: Tank Archives: D-44 Ballistic Tables; WW2 Equipment Data Soviet Explosive Ordnance - 85mm and 100mm Projectiles; Milzo: 85 mm AP-T BR-365 and BR-365K.
Timeline
85 mm BR-365K AP round Key Events
85 mm family wartime context
The T-34/85's D-5T and ZiS-S-53 tank-gun family provides the wartime 85 mm context for BR-365K compatibility in WW2 Equipment Data's weapons list.
Sources: WW2 Equipment Data Soviet Explosive Ordnance - 85mm and 100mm Projectiles
D-44 service context
The D-44 entered the postwar 85 mm gun family, and Tank Archives' D-44 ballistic tables preserve BR-365K ballistic data for that gun context.
Sources: WeaponSystems.net: 85mm D-44, Tank Archives: D-44 Ballistic Tables
Media
85 mm BR-365K AP round Images
Media And Video Coverage
The gallery uses the WW2 Equipment Data round and packaging images because they directly depict UBR-365K and include the image provenance used by this record. YouTube search results for this exact round are dominated by game or simulation clips rather than official, museum, manufacturer, archival, or reputable news footage, so videos are omitted.
Related Weapon Systems
Sources
Tank Archives: D-44 Ballistic TablesPublisher: Tank Archives | Note: Supports the BR-365K sharp-tipped AP round entry, its 800 m/s muzzle velocity, and its 0.3 x 0.4 m dispersion at 1,000 m in the D-44 ballistic-table context. | Accessed: 2026-07-03WW2 Equipment Data Soviet Explosive Ordnance - 85mm and 100mm ProjectilesPublisher: WW2 Equipment Data | Note: Supports the UBR-365K complete-round designation, the BR-365K AP-T projectile, MD-8 fuze, projectile fill context, target set, same-weapons relationship to UBR-365, listed firing weapons, and image provenance for the round image used here. | Accessed: 2026-07-03Munition, projectile, 53-BR-365K | METISPublisher: METIS | Note: Supports the 53-BR-365K / BR-365K designation, APHE-T classification, USSR manufacture context, ogival uncapped nose description, MD-8 base-fuze context, and existence of minor structural variants. | Accessed: 2026-07-03Milzo: 85 mm AP-T BR-365 and BR-365KPublisher: Milzo | Note: Supports BR-365K complete-round construction, approximate weights and dimensions, 48 g bursting-charge reporting, propellant weight, approximately 800 m/s muzzle velocity, and listed applications including D-44, SD-44, ZiS-S-53, D-5T, Type 56, and related 85 mm guns. | Accessed: 2026-07-03WeaponSystems.net: 85mm D-44Publisher: WeaponSystems.net | Note: Supports the D-44's 1946 service-entry context used in the timeline and firing-gun relationship context. | Accessed: 2026-07-03