Load data for .300 Win. Mag. + 125gr Sierra SPT Pro-Hunter
Based on C.I.P., the max. allowed case length is 2.620 in / 66.55 mm, the max. cartridge length is 3.340 in / 84.84 mm, and the max. allowed pressure is 62,366 PSI / 4,300 bar.
Based on C.I.P., the max. allowed case length is 2.620 in / 66.55 mm, the max. cartridge length is 3.340 in / 84.84 mm, and the max. allowed pressure is 62,366 PSI / 4,300 bar.
Load Specifications
ImperialMetric
Cartridge:.300 Win. Mag. load data
Case Length (L3):2.620" | 66.5 mm
Cartridge Length (COL/L6):•••
Seated Depth:0.245" | 6.2 mm
Case Capacity:90.5 gow | 5.86 cm³
Primer Size:Large Rifle Magnum (LRM)
Max. Pressure (C.I.P.):62,366 psi | 4,300 bar
Barrel Length:24.0" | 610 mm
Min. Twist Rate:Stabilizes in any common twist
Get PRO license to unlock all data and calculators
Community Loads for .300 Win. Mag. + 125gr Sierra SPT Pro-Hunter
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) |
|---|---|---|---|---|---|
| 65.2 gr | 3.340" | 24.0" | 3129 fps | ••• | |
| 67.1 gr | 3.340" | 24.0" | 3205 fps | ••• | |
| 69.1 gr | 3.340" | 24.0" | 3284 fps | ••• | |
| ••• | 3.340" | 24.0" | 3363 fps | ••• | |
| ••• | 3.340" | 24.0" | 3065 fps | ••• | |
| ••• | 3.340" | 24.0" | 3145 fps | ••• | |
| ••• | 3.340" | 24.0" | 3231 fps | ••• | |
| ••• | 3.340" | 24.0" | 3319 fps | ••• | |
| ••• | 3.340" | 24.0" | 3410 fps | ••• | |
| ••• | 3.340" | 24.0" | 2993 fps | ••• | |
| ••• | 3.340" | 24.0" | 3066 fps | ••• | |
| ••• | 3.340" | 24.0" | 3136 fps | ••• | |
| ••• | 3.340" | 24.0" | 3213 fps | ••• | |
| ••• | 3.340" | 24.0" | 3287 fps | ••• | |
| ••• | 3.340" | 24.0" | 3362 fps | ••• | |
| ••• | 3.340" | 24.0" | 3084 fps | ••• | |
| ••• | 3.340" | 24.0" | 3149 fps | ••• | |
| ••• | 3.340" | 24.0" | 3231 fps | ••• | |
| ••• | 3.340" | 24.0" | 3315 fps | ••• | |
| ••• | 3.340" | 24.0" | 3411 fps | ••• | |
| ••• | 3.340" | 24.0" | 3219 fps | ••• | |
| ••• | 3.340" | 24.0" | 3292 fps | ••• | |
| ••• | 3.340" | 24.0" | 2910 fps | ••• | |
| ••• | 3.340" | 24.0" | 2991 fps | ••• | |
| ••• | 3.340" | 24.0" | 3080 fps | ••• | |
| ••• | 3.340" | 24.0" | 3168 fps | ••• | |
| ••• | 3.340" | 24.0" | 3263 fps | ••• | |
| ••• | 3.340" | 24.0" | 3070 fps | ••• | |
| ••• | 3.340" | 24.0" | 3139 fps | ••• | |
| ••• | 3.340" | 24.0" | 3210 fps | ••• | |
| ••• | 3.340" | 24.0" | 2922 fps | ••• | |
| ••• | 3.340" | 24.0" | 2998 fps | ••• | |
| ••• | 3.340" | 24.0" | 3076 fps | ••• | |
| ••• | 3.340" | 24.0" | 3155 fps | ••• | |
| ••• | 3.340" | 24.0" | 3238 fps | ••• | |
| ••• | 3.340" | 24.0" | 3188 fps | ••• | |
| ••• | 3.340" | 24.0" | 3265 fps | ••• | |
| ••• | 3.340" | 24.0" | 3344 fps | ••• | |
| ••• | 3.265" | 24.0" | 2937 fps | ••• | |
| ••• | 3.340" | 24.0" | 3202 fps | ••• | |
| ••• | 3.340" | 24.0" | 3294 fps | ••• | |
| ••• | 3.340" | 24.0" | 2908 fps | ••• | |
| ••• | 3.340" | 24.0" | 2996 fps | ••• | |
| ••• | 3.340" | 24.0" | 3088 fps | ••• | |
| ••• | 3.340" | 24.0" | 3179 fps | ••• | |
Charge weights beyond the first rows and all pressure values are only visible with an active Pro licence.