CaliberAtlas › .338-57 O'Connor
Common uses: Hunting, Big Game
| Type | rifle (centerfire) |
| Typical load | 200gr SPBT |
| Muzzle velocity | 2400 fps |
| Muzzle energy | 2550 ft-lb |
| G1 ballistic coefficient | 0.2 |
| Case length | 57 mm |
| Overall length | 78 mm |
| Range (yd) | Velocity (fps) | Energy (ft-lb) | Drop (in) |
|---|---|---|---|
| 0 | 2400 | 2550 | 0 |
| 100 | 2280 | 2301 | -8 |
| 200 | 2166 | 2077 | -33 |
| 300 | 2058 | 1874 | -75 |
| 400 | 1955 | 1692 | -133 |
| 500 | 1857 | 1527 | -208 |
Guidelines only — ammunition choice, conditions, and shooter skill matter. Always follow local laws.
The .338-57 O'Connor is a centerfire rifle cartridge, delivering substantial energy on target, which shapes where it fits between varmint work, big-game hunting, and precision shooting. A representative 200-grain loading leaves the muzzle at roughly 2400 fps and carries about 2550 ft-lbs of energy, with a G1 ballistic coefficient near 0.2. With a modest BC, it sheds velocity faster downrange and is best kept to shorter distances. Based on its energy and trajectory, ethical ranges work out to roughly small game and varmints to about 300 yards; medium game such as deer to about 400 yards; larger game to about 500 yards — always within the limits of your own accuracy and local regulations. Recoil is generally moderate for the class, and our database tracks 1 factory loading so you can compare bullet weights and velocities for your specific use. Figures here are for reference and informational use — always verify against manufacturer data.
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