Ammunition
| Type | Model | Weight | HE filling, g |
| Armour-piercing projectiles (muzzle velocity up to 990 m/s) | |||
| APHE | BR-271K | 3.16 kg (7.0 lb) | 18 |
|---|---|---|---|
| APCBC | BR-271 | 3.16 kg (7.0 lb) | 14 |
| APCBC (improved penetration) | BR-271M | 2.80 kg (6.2 lb) | 13 |
| AP (solid) | BR-271SP | 3.16 kg (7.0 lb) | none |
| Composite Armour-piercing projectiles (muzzle velocity up to 1250 m/s) | |||
| APCR "Reel" type | BR-271P | 1.79 kg (3.9 lb) | none |
| APCR "Smooth" type | BR-271N | 2.4 kg (5.3 lb) | N/A |
| Other projectiles (muzzle velocity up to 700 m/s) | |||
| Fragmentation | O-271U (O-271G) | 3.75 kg (8.3 lb) | 204 or 220 |
| Canister | Shch-271 | 3.66 kg (8.1 lb) | none |
- Armour penetration
| APHE projectile BR-271K | ||
|---|---|---|
| Distance, m | Meet angle 60°, mm | Meet angle 90°, mm |
| 100 | 91 | 112 |
| 300 | 84 | 103 |
| 500 | 76 | 94 |
| 1000 | 60 | 74 |
| 1500 | 46 | 57 |
| 2000 | 35 | 44 |
| APCBC projectile BR-271 | ||
| Distance, m | Meet angle 60°, mm | Meet angle 90°, mm |
| 100 | 93 | 114 |
| 300 | 89 | 109 |
| 500 | 84 | 103 |
| 1000 | 74 | 91 |
| 1500 | 64 | 79 |
| 2000 | 56 | 69 |
| APCR projectile BR-271P | ||
| Distance, m | Meet angle 60°, mm | Meet angle 90°, mm |
| 100 | 155 | 190 |
| 300 | 137 | 168 |
| 500 | 120 | 147 |
| 1000 | 83 | 101 |
| These data was obtained by Soviet methods of armour penetration measurement (penetration probability equals 75%). They are not directly comparable with western data of similar type | ||
Read more about this topic: 57 Mm Anti-tank Gun M1943 (Zi S-2)