Tier X Heavy Tank Soviet Union

Object 277

Obj. 277

Tank ID 22017

Vehicle description

Wargaming Tankopedia

Developed in 1956–1958 at the Kirov Plant, Leningrad, under the supervision of Joseph Kotin. Two prototypes were produced and underwent trials from 1959 through 1960. A hull and a turret were produced for testing for shell resistance. The development was discontinued in the summer of 1960 due to insufficient development of certain systems and components. In addition, the vehicle did not demonstrate any advantage over the Object 770 heavy tank.

Description from the Wargaming Tankopedia · Language selected automatically

Technical profile

Standard configuration

Hit points

2,200

Weight

55.0 t

Forward speed

55 km/h

Reverse speed

15 km/h

View range

400 m

Signal range

730 m

Armour

	Front	Sides	Rear
Hull	140	112	50
Turret	290	224	80

Engine: M-850 · 950 hp

Radio: R-113

Armament

Standard gun and ammunition

130 mm M-65

Calibre 130 mm

Reload time 12.5 s

Aiming time 2.7 s

Dispersion 0.38

Rate of fire 4.80 /min

Ammo capacity 35

Shell types

AP · armour-piercing Damage 368 / 490 / 613

Penetration 199 / 265 / 331 mm

HEAT · shaped charge Damage 368 / 490 / 613

Penetration 255 / 340 / 425 mm

HE · high explosive Damage 480 / 640 / 800

Penetration 49 / 65 / 81 mm

Marks of Excellence

Damage thresholds

Combined Damage (Damage + Assist + Tracking)

Combined damage

1 Mark ≥ 65 %

3,103

2 Marks ≥ 85 %

4,514

3 Marks ≥ 95 %

5,831

Approximation based on WN8 expected values — not an official Wargaming figure.

WN8 Expected Values

XVM reference

XVM Expected Values for WN8 calculation (per battle)

Per battle (avg.)

Avg. damage 1,881

Avg. spotted 1.43

Avg. kills 0.85

Avg. defence 0.44

Exp. win rate 49.49 %

Community stats

Measured, not estimated

Average across every profile stored on WG-Watch — real battles instead of expected values.

Win rate

54.34 %

Avg. WN8

2,412

Battles

56,335

As of Aug 31, 2026

Rank 88 of 110 at Tier X

Best players on this tank

By WN8

From the stored profiles, minimum 50 battles on this vehicle. Updated daily.

#	Player	WN8	Battles	Win rate
1	HockeyGoaIie na	6,571	78	71.79 %
2	666Niklas na	6,171	71	53.52 %
3	Daddy eu	5,876	109	64.22 %
4	Franchini_ na	5,697	101	58.42 %
5	BigPrank eu	5,540	181	63.54 %
6	mailand eu	5,010	184	66.85 %
7	DaCupCakkeZor eu	4,961	180	68.89 %
8	EvilQuintessence eu	4,919	127	70.87 %
9	Baby eu	4,852	85	57.65 %
10	moimoi12_FIN eu	4,774	138	63.04 %