Load data for .30-40 Krag + 220gr Hornady InterLock RN
The most recommended powders for this combination are Vihtavuori N160.
Based on C.I.P., the max. allowed case length is 2.314 in / 58.78 mm, the max. cartridge length is 3.089 in / 78.46 mm, and the max. allowed pressure is 47,137 PSI / 3,250 bar.

Based on C.I.P., the max. allowed case length is 2.314 in / 58.78 mm, the max. cartridge length is 3.089 in / 78.46 mm, and the max. allowed pressure is 47,137 PSI / 3,250 bar.

Load Specifications
ImperialMetric
Bullet:.308 | 220gr | InterLock RN
Cartridge:.30-40 Krag load data
Case Length (L3):2.314" | 58.8 mm
Cartridge Length (COL/L6):•••
Seated Depth:0.524" | 13.3 mm
Case Capacity:58 gow | 3.76 cm³
Primer Size:Large Rifle (LR)
Max. Pressure (C.I.P.):47,137 psi | 3,250 bar
Barrel Length:24.0" | 610 mm
Min. Twist Rate:1:14.5
Get PRO license to unlock all data and calculators
Community Loads for .30-40 Krag + 220gr Hornady InterLock RN
Real loads for this combination shared by our community. Charge weights are only fully visible with an active Pro licence.
| Powder | Charge (gr) | C.O.L. | Barrel Length | Velocity (fps) | Pressure (psi) |
|---|---|---|---|---|---|
| 42.2 gr | 3.089" | 24.0" | 2146 fps | ••• | |
Charge weights beyond the first rows and all pressure values are only visible with an active Pro licence.