Load Specifications
Load data in caliber .30-378 Weath. Mag. with .308 | 175gr | Berger VLD Hunting bullet and 51 powders. The key underlying parameters are shown in the table above.
Important Notice: DO NOT go below Minimum Charge or above Maximum Charge. Since we have no control over the equipment and components used, any responsibility and liability for the results achieved is rejected.
Only powders/loads that match the current filter criteria are displayed: max pressure of a load ≤ 90% of max. standardized pressure, fill rate ≥ 80% and propellant combustion ≥ 95%. Use the sliders above the tables to adjust these thresholds.
Charge: Powder weight in grains. Start with the minimum load and work up carefully.
FR (Fill Rate): Case fill as a percentage. Values above 100% mean compressed loads.
MaxP / %: Maximum chamber pressure in bar and as a percentage of the standardized maximum for this caliber.
V(0): Muzzle velocity in feet per second (fps) at the standardized barrel length.
z (Powder Burn): Estimated propellant combustion percentage at bullet exit.
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Max Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 86% | 56,072 psi | 88% | 3071 fps | 100% |
| Accurate High Country | <<locked>> | 82% | 54,273 psi | 85% | 3176 fps | 99.8% |
| Accurate MAGPRO | <<locked>> | 84% | 55,274 psi | 87% | 3186 fps | 99.3% |
| ADI AR 2209 | <<locked>> | 84% | 57,130 psi | 90% | 3163 fps | 100% |
| ADI AR 2213 | <<locked>> | 86% | 55,796 psi | 87% | 3179 fps | 99.8% |
| ADI AR 2217 | <<locked>> | 94% | 54,868 psi | 86% | 3159 fps | 99.9% |
| ADI AR 2218 | <<locked>> | 98% | 55,492 psi | 87% | 3284 fps | 98.6% |
| ADI AR 2225 | <<locked>> | 96% | 54,201 psi | 85% | 3182 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 56,710 psi | 89% | 3153 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 86% | 56,318 psi | 88% | 3173 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 86% | 54,505 psi | 85% | 3077 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 90% | 55,085 psi | 86% | 3156 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 82% | 55,187 psi | 86% | 3166 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 96% | 57,508 psi | 90% | 3261 fps | 98.6% |
| Alliant Reloder-50ᴾ | <<locked>> | 100% | 57,377 psi | 90% | 3248 fps | 98.2% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 56,217 psi | 88% | 3136 fps | 98.5% |
| Bofors RP15 | <<locked>> | 88% | 55,724 psi | 87% | 3163 fps | 100% |
| Bofors RP30 | <<locked>> | 92% | 54,940 psi | 86% | 3173 fps | 99.9% |
| Bofors RP5 | <<locked>> | 86% | 56,318 psi | 88% | 3173 fps | 100% |
| Hodgdon H1000 | <<locked>> | 92% | 56,304 psi | 88% | 3179 fps | 100% |
| Hodgdon H4831 | <<locked>> | 84% | 54,607 psi | 86% | 3107 fps | 99.5% |
| Hodgdon H4831 SC | <<locked>> | 86% | 57,435 psi | 90% | 3156 fps | 99.7% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 57,305 psi | 90% | 3061 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 90% | 54,331 psi | 85% | 3248 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,782 psi | 59% | 2031 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 84% | 55,027 psi | 86% | 3084 fps | 99.6% |
| IMR 7828 SSC | <<locked>> | 86% | 54,360 psi | 85% | 3163 fps | 99.8% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 57,058 psi | 89% | 3222 fps | 100% |
| Lovex S071 | <<locked>> | 90% | 54,447 psi | 85% | 3045 fps | 100% |
| Norma 217 | <<locked>> | 98% | 54,592 psi | 86% | 3186 fps | 100% |
| Norma MRP | <<locked>> | 84% | 56,478 psi | 89% | 3189 fps | 100% |
| Ramshot Grand | <<locked>> | 86% | 55,564 psi | 87% | 3186 fps | 99.9% |
| Ramshot Magnum | <<locked>> | 88% | 54,128 psi | 85% | 3107 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,856 psi | 61% | 2080 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 55,245 psi | 87% | 3232 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 92% | 54,505 psi | 85% | 3196 fps | 99.4% |
| Rottweil R 904 | <<locked>> | 84% | 57,522 psi | 90% | 3133 fps | 99.9% |
| Rottweil R 905 | <<locked>> | 84% | 56,594 psi | 89% | 3146 fps | 100% |
| SNPE Vectan SP 13ᴾ | <<locked>> | 100% | 49,545 psi | 78% | 3035 fps | 96% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 56,217 psi | 88% | 3140 fps | 100% |
| Somchem S361 | <<locked>> | 82% | 55,259 psi | 87% | 3061 fps | 99.5% |
| Somchem S385 | <<locked>> | 84% | 56,826 psi | 89% | 3110 fps | 100% |
| Vihtavuori N165 | <<locked>> | 88% | 56,927 psi | 89% | 3097 fps | 100% |
| Vihtavuori N170 | <<locked>> | 92% | 56,231 psi | 88% | 3123 fps | 97% |
| Vihtavuori N555 | <<locked>> | 84% | 56,246 psi | 88% | 3107 fps | 100% |
| Vihtavuori N560 | <<locked>> | 84% | 55,811 psi | 87% | 3192 fps | 99.7% |
| Vihtavuori N565 | <<locked>> | 90% | 57,072 psi | 89% | 3189 fps | 99.8% |
| Vihtavuori N568 | <<locked>> | 92% | 55,013 psi | 86% | 3199 fps | 99.2% |
| Vihtavuori N570 | <<locked>> | 94% | 56,391 psi | 88% | 3264 fps | 98.1% |
| Winchester StaBALL HD | <<locked>> | 86% | 54,984 psi | 86% | 3173 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 86% | 56,797 psi | 89% | 3107 fps | 100% |
Start Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 80% | 45,919 psi | 72% | 2900 fps | 100% |
| Accurate High Country | <<locked>> | 80% | 50,546 psi | 79% | 3107 fps | 99.4% |
| Accurate MAGPRO | <<locked>> | 80% | 47,921 psi | 75% | 3048 fps | 98.2% |
| ADI AR 2209 | <<locked>> | 80% | 49,951 psi | 78% | 3041 fps | 99.8% |
| ADI AR 2213 | <<locked>> | 80% | 45,237 psi | 71% | 2982 fps | 98.6% |
| ADI AR 2217 | <<locked>> | 80% | 33,707 psi | 53% | 2703 fps | 95.3% |
| ADI AR 2218 | <<locked>> | 92% | 44,411 psi | 70% | 3048 fps | 95.4% |
| ADI AR 2225 | <<locked>> | 80% | 31,082 psi | 49% | 2671 fps | 97.4% |
| Alliant Reloder-19 | <<locked>> | 80% | 49,777 psi | 78% | 3031 fps | 99.8% |
| Alliant Reloder-22 | <<locked>> | 80% | 46,006 psi | 72% | 2986 fps | 99.4% |
| Alliant Reloder-23 | <<locked>> | 80% | 44,686 psi | 70% | 2913 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 38,914 psi | 61% | 2854 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 80% | 51,082 psi | 80% | 3100 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 90% | 45,730 psi | 72% | 3038 fps | 96% |
| Alliant Reloder-50 | <<locked>> | 94% | 45,774 psi | 72% | 3025 fps | 95.3% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 43,265 psi | 68% | 2884 fps | 95.5% |
| Bofors RP15 | <<locked>> | 80% | 42,786 psi | 67% | 2920 fps | 98.8% |
| Bofors RP30 | <<locked>> | 80% | 36,376 psi | 57% | 2785 fps | 96.5% |
| Bofors RP5 | <<locked>> | 80% | 46,006 psi | 72% | 2986 fps | 99.4% |
| Hodgdon H1000 | <<locked>> | 80% | 36,738 psi | 58% | 2785 fps | 97.3% |
| Hodgdon H4831 | <<locked>> | 80% | 47,732 psi | 75% | 2979 fps | 98.5% |
| Hodgdon H4831 SC | <<locked>> | 80% | 46,891 psi | 73% | 2963 fps | 98.4% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 53,838 psi | 84% | 3009 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 80% | 38,058 psi | 60% | 2907 fps | 98.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,471 psi | 45% | 1824 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 48,385 psi | 76% | 2966 fps | 98.8% |
| IMR 7828 SSC | <<locked>> | 80% | 44,005 psi | 69% | 2963 fps | 98.3% |
| IMR 8133 Enduron | <<locked>> | 86% | 35,244 psi | 55% | 2772 fps | 95.9% |
| Lovex S071 | <<locked>> | 80% | 39,581 psi | 62% | 2769 fps | 99.7% |
| Norma 217 | <<locked>> | 80% | 28,805 psi | 45% | 2605 fps | 95.1% |
| Norma MRP | <<locked>> | 80% | 49,023 psi | 77% | 3061 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 44,367 psi | 70% | 2979 fps | 98.7% |
| Ramshot Magnum | <<locked>> | 80% | 40,074 psi | 63% | 2844 fps | 99.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,138 psi | 46% | 1864 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 37,405 psi | 59% | 2877 fps | 99.3% |
| ReloadSwiss RS 80 | <<locked>> | 82% | 37,246 psi | 58% | 2831 fps | 95.2% |
| Rottweil R 904 | <<locked>> | 80% | 50,473 psi | 79% | 3012 fps | 99.4% |
| Rottweil R 905 | <<locked>> | 80% | 49,472 psi | 78% | 3022 fps | 99.8% |
| SNPE Vectan SP 13 | <<locked>> | 98% | 46,180 psi | 72% | 2969 fps | 95.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 49,124 psi | 77% | 3018 fps | 99.7% |
| Somchem S361 | <<locked>> | 80% | 51,692 psi | 81% | 2999 fps | 99.1% |
| Somchem S385 | <<locked>> | 80% | 49,908 psi | 78% | 2992 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 43,671 psi | 68% | 2864 fps | 99.4% |
| Vihtavuori N170 | <<locked>> | 88% | 49,110 psi | 77% | 2992 fps | 95.3% |
| Vihtavuori N555 | <<locked>> | 80% | 49,400 psi | 77% | 2995 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 48,544 psi | 76% | 3061 fps | 98.8% |
| Vihtavuori N565 | <<locked>> | 80% | 40,480 psi | 63% | 2864 fps | 97.1% |
| Vihtavuori N568 | <<locked>> | 82% | 38,348 psi | 60% | 2851 fps | 95% |
| Vihtavuori N570 | <<locked>> | 88% | 45,295 psi | 71% | 3048 fps | 95.3% |
| Winchester StaBALL HD | <<locked>> | 80% | 43,729 psi | 69% | 2982 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 46,021 psi | 72% | 2920 fps | 99.4% |
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 59 powders for .30-378 Weath. Mag. loaded with the .308 | 175gr | Berger VLD Hunting. ADI AR 2218 delivers the highest muzzle velocity at 3,284 fps; across all powders the maximum-charge window runs from 2,031 fps to 3,284 fps. Accurate 8700 gives the best case fill at 100 %, and 59 of the 59 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 59–90 %, leaving at least 10 % headroom. The 175.0 gr projectile in 0.308" calls for a 1:12.0 twist; slower twists will usually not stabilise this weight. Accurate 8700, Alliant Reloder-50, Hodgdon TrailBoss reach 100 % fill or more at maximum charge, so these are compressed loads: they need a long drop tube to seat cleanly and react sensitively to the case capacity of your own brass lot. As outliers, Hodgdon US 869, Lovex D100, Ramshot LRT burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.