Load data for .257 Roberts + 85gr Nosler Ballistic Tip Varmint
The most recommended powders for this combination are Alliant Reloder-15.
Based on C.I.P., the max. allowed case length is 2.233 in / 56.72 mm, the max. cartridge length is 2.775 in / 70.49 mm, and the max. allowed pressure is 51,488 PSI / 3,550 bar.
Based on C.I.P., the max. allowed case length is 2.233 in / 56.72 mm, the max. cartridge length is 2.775 in / 70.49 mm, and the max. allowed pressure is 51,488 PSI / 3,550 bar.
Load Specifications
ImperialMetric
Cartridge:.257 Roberts load data
Case Length (L3):2.233" | 56.7 mm
Cartridge Length (COL/L6):•••
Seated Depth:0.497" | 12.6 mm
Case Capacity:58 gow | 3.76 cm³
Primer Size:Large Rifle (LR)
Max. Pressure (C.I.P.):51,488 psi | 3,550 bar
Barrel Length:24.0" | 610 mm
Min. Twist Rate:1:10.5
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Community Loads for .257 Roberts + 85gr Nosler Ballistic Tip Varmint
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) |
|---|---|---|---|---|---|
| 44.8 gr | 2.750" | 24.0" | 3127 fps | ••• | |
| 45.0 gr | 2.750" | 24.0" | 2901 fps | ••• | |
| 50.0 gr | 2.750" | 24.0" | 3070 fps | ••• | |
| ••• | 2.750" | 24.0" | 3217 fps | ••• | |
| ••• | 2.750" | 24.0" | 2990 fps | ••• | |
| ••• | 2.750" | 24.0" | 3121 fps | ••• | |
| ••• | 2.750" | 24.0" | 3257 fps | ••• | |
| ••• | 2.780" | 24.0" | 3200 fps | ••• | |
| ••• | 2.750" | 24.0" | 3043 fps | ••• | |
| ••• | 2.750" | 24.0" | 3172 fps | ••• | |
| ••• | 2.750" | 24.0" | 2998 fps | ••• | |
| ••• | 2.750" | 24.0" | 3123 fps | ••• | |
| ••• | 2.750" | 24.0" | 3121 fps | ••• | |
| ••• | 2.750" | 24.0" | 3086 fps | ••• | |
| ••• | 2.750" | 24.0" | 3008 fps | ••• | |
| ••• | 2.750" | 24.0" | 3224 fps | ••• | |
| ••• | 2.750" | 24.0" | 3018 fps | ••• | |
| ••• | 2.750" | 24.0" | 3141 fps | ••• | |
| ••• | 2.750" | 24.0" | 3020 fps | ••• | |
| ••• | 2.750" | 24.0" | 3150 fps | ••• | |
| ••• | 2.750" | 24.0" | 2924 fps | ••• | |
| ••• | 2.750" | 24.0" | 3048 fps | ••• | |
| ••• | 2.750" | 24.0" | 3066 fps | ••• | |
| ••• | 2.750" | 24.0" | 3176 fps | ••• | |
| ••• | 2.750" | 24.0" | 3181 fps | ••• | |
| ••• | 2.750" | 24.0" | 3060 fps | ••• | |
| ••• | 2.750" | 24.0" | 3199 fps | ••• | |
| ••• | 2.750" | 24.0" | 2857 fps | ••• | |
| ••• | 2.750" | 24.0" | 3087 fps | ••• | |
| ••• | 2.750" | 24.0" | 3176 fps | ••• | |
| ••• | 2.750" | 24.0" | 2944 fps | ••• | |
| ••• | 2.750" | 24.0" | 3080 fps | ••• | |
| ••• | 2.750" | 24.0" | 3204 fps | ••• | |
| ••• | 2.750" | 24.0" | 3108 fps | ••• | |
| ••• | 2.750" | 24.0" | 3166 fps | ••• | |
| ••• | 2.750" | 24.0" | 3025 fps | ••• | |
| ••• | 2.750" | 24.0" | 3219 fps | ••• | |
| ••• | 2.750" | 24.0" | 3253 fps | ••• | |
Charge weights beyond the first rows and all pressure values are only visible with an active Pro licence.