Load Specifications
Load data in caliber .30-378 Weath. Mag. with .308 | 180gr | Norma VULKAN bullet and 50 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ADI AR 2218, Vihtavuori N570 and Hodgdon Retumbo.
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>> | 84% | 54,723 psi | 86% | 3012 fps | 100% |
| Accurate 8700ᴾ | <<locked>> | 100% | 50,053 psi | 78% | 3035 fps | 97% |
| Accurate MAGPRO | <<locked>> | 84% | 57,580 psi | 90% | 3186 fps | 99.7% |
| ADI AR 2209 | <<locked>> | 82% | 55,535 psi | 87% | 3100 fps | 100% |
| ADI AR 2213 | <<locked>> | 84% | 54,259 psi | 85% | 3114 fps | 99.8% |
| ADI AR 2217 | <<locked>> | 94% | 57,638 psi | 90% | 3163 fps | 100% |
| ADI AR 2218 | <<locked>> | 96% | 54,070 psi | 85% | 3222 fps | 98.6% |
| ADI AR 2225 | <<locked>> | 96% | 57,043 psi | 89% | 3182 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 55,158 psi | 86% | 3091 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 84% | 54,853 psi | 86% | 3110 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 86% | 56,855 psi | 89% | 3071 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 90% | 57,696 psi | 90% | 3153 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 82% | 57,740 psi | 90% | 3163 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 94% | 56,202 psi | 88% | 3199 fps | 98.7% |
| Alliant Reloder-50 | <<locked>> | 98% | 56,333 psi | 88% | 3192 fps | 98.3% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 54,592 psi | 86% | 3074 fps | 98.5% |
| Bofors RP15 | <<locked>> | 86% | 54,404 psi | 85% | 3104 fps | 100% |
| Bofors RP30 | <<locked>> | 92% | 57,479 psi | 90% | 3176 fps | 100% |
| Bofors RP5 | <<locked>> | 84% | 54,853 psi | 86% | 3110 fps | 100% |
| Hodgdon H1000 | <<locked>> | 90% | 55,071 psi | 86% | 3120 fps | 100% |
| Hodgdon H4831 | <<locked>> | 84% | 56,710 psi | 89% | 3104 fps | 99.8% |
| Hodgdon H4831 SC | <<locked>> | 84% | 55,738 psi | 87% | 3091 fps | 99.7% |
| Hodgdon Retumbo | <<locked>> | 90% | 57,290 psi | 90% | 3248 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 38,014 psi | 60% | 2018 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 84% | 56,782 psi | 89% | 3081 fps | 99.8% |
| IMR 7828 SSC | <<locked>> | 86% | 56,753 psi | 89% | 3163 fps | 100% |
| IMR 8133 Enduron | <<locked>> | 98% | 56,086 psi | 88% | 3169 fps | 100% |
| Lovex S071 | <<locked>> | 90% | 56,666 psi | 89% | 3041 fps | 100% |
| Norma 217 | <<locked>> | 98% | 57,508 psi | 90% | 3189 fps | 100% |
| Norma MRP | <<locked>> | 82% | 55,071 psi | 86% | 3127 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 54,128 psi | 85% | 3123 fps | 99.9% |
| Ramshot Magnum | <<locked>> | 88% | 56,811 psi | 89% | 3110 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,972 psi | 61% | 2060 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 53,940 psi | 85% | 3169 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 92% | 57,435 psi | 90% | 3205 fps | 99.8% |
| Rottweil R 904 | <<locked>> | 82% | 55,709 psi | 87% | 3068 fps | 99.9% |
| Rottweil R 905 | <<locked>> | 82% | 55,056 psi | 86% | 3081 fps | 100% |
| SNPE Vectan SP 13ᴾ | <<locked>> | 100% | 52,011 psi | 82% | 3045 fps | 97.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 54,694 psi | 86% | 3077 fps | 100% |
| Somchem S361 | <<locked>> | 82% | 57,145 psi | 90% | 3054 fps | 99.8% |
| Somchem S385 | <<locked>> | 82% | 55,259 psi | 87% | 3048 fps | 100% |
| Vihtavuori N165 | <<locked>> | 86% | 55,434 psi | 87% | 3035 fps | 100% |
| Vihtavuori N170 | <<locked>> | 90% | 54,723 psi | 86% | 3061 fps | 97.1% |
| Vihtavuori N555 | <<locked>> | 82% | 54,911 psi | 86% | 3048 fps | 100% |
| Vihtavuori N560 | <<locked>> | 82% | 54,389 psi | 85% | 3130 fps | 99.7% |
| Vihtavuori N565 | <<locked>> | 88% | 55,767 psi | 87% | 3130 fps | 99.9% |
| Vihtavuori N568 | <<locked>> | 92% | 57,711 psi | 90% | 3205 fps | 99.6% |
| Vihtavuori N570 | <<locked>> | 92% | 55,114 psi | 86% | 3205 fps | 98.2% |
| Winchester StaBALL HD | <<locked>> | 84% | 53,867 psi | 84% | 3107 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 84% | 55,085 psi | 86% | 3045 fps | 100% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 80% | 47,848 psi | 75% | 2897 fps | 100% |
| Accurate 8700 | <<locked>> | 98% | 46,441 psi | 73% | 2963 fps | 96% |
| Accurate MAGPRO | <<locked>> | 80% | 50,082 psi | 78% | 3051 fps | 98.9% |
| ADI AR 2209 | <<locked>> | 80% | 51,924 psi | 81% | 3038 fps | 100% |
| ADI AR 2213 | <<locked>> | 80% | 47,195 psi | 74% | 2986 fps | 99.1% |
| ADI AR 2217 | <<locked>> | 80% | 35,273 psi | 55% | 2713 fps | 96.4% |
| ADI AR 2218 | 110 gr | 90% | 43,337 psi | 68% | 2989 fps | 95.5% |
| ADI AR 2225 | <<locked>> | 80% | 32,605 psi | 51% | 2684 fps | 98.4% |
| Alliant Reloder-19 | <<locked>> | 80% | 51,692 psi | 81% | 3028 fps | 99.9% |
| Alliant Reloder-22 | <<locked>> | 80% | 47,979 psi | 75% | 2989 fps | 99.8% |
| Alliant Reloder-23 | <<locked>> | 80% | 46,717 psi | 73% | 2910 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 40,901 psi | 64% | 2861 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 80% | 53,722 psi | 84% | 3100 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 88% | 44,846 psi | 70% | 2979 fps | 96% |
| Alliant Reloder-50 | <<locked>> | 92% | 45,078 psi | 71% | 2972 fps | 95.5% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 44,918 psi | 70% | 2890 fps | 96.4% |
| Bofors RP15 | <<locked>> | 80% | 44,643 psi | 70% | 2920 fps | 99.3% |
| Bofors RP30 | <<locked>> | 80% | 38,203 psi | 60% | 2795 fps | 97.5% |
| Bofors RP5 | <<locked>> | 80% | 47,979 psi | 75% | 2989 fps | 99.8% |
| Hodgdon H1000 | <<locked>> | 80% | 38,421 psi | 60% | 2795 fps | 98.1% |
| Hodgdon H4831 | <<locked>> | 80% | 49,588 psi | 78% | 2979 fps | 99.1% |
| Hodgdon H4831 SC | <<locked>> | 80% | 48,718 psi | 76% | 2966 fps | 99% |
| Hodgdon Retumbo | 92.3 gr | 80% | 40,001 psi | 63% | 2920 fps | 99.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,485 psi | 45% | 1804 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 50,096 psi | 79% | 2966 fps | 99.2% |
| IMR 7828 SSC | <<locked>> | 80% | 46,021 psi | 72% | 2969 fps | 99% |
| IMR 8133 Enduron | <<locked>> | 84% | 34,751 psi | 54% | 2723 fps | 96.1% |
| Lovex S071 | <<locked>> | 80% | 41,263 psi | 65% | 2769 fps | 99.9% |
| Norma 217 | <<locked>> | 80% | 30,530 psi | 48% | 2621 fps | 96.5% |
| Norma MRP | <<locked>> | 80% | 51,285 psi | 80% | 3064 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 46,673 psi | 73% | 2989 fps | 99.3% |
| Ramshot Magnum | <<locked>> | 80% | 42,105 psi | 66% | 2851 fps | 99.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,283 psi | 46% | 1847 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 39,566 psi | 62% | 2890 fps | 99.8% |
| ReloadSwiss RS 80 | <<locked>> | 80% | 36,448 psi | 57% | 2776 fps | 95.2% |
| Rottweil R 904 | <<locked>> | 80% | 52,330 psi | 82% | 3009 fps | 99.7% |
| Rottweil R 905 | <<locked>> | 80% | 51,488 psi | 81% | 3022 fps | 100% |
| SNPE Vectan SP 13 | <<locked>> | 96% | 45,266 psi | 71% | 2917 fps | 95.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 51,140 psi | 80% | 3015 fps | 99.9% |
| Somchem S361 | <<locked>> | 80% | 53,534 psi | 84% | 2999 fps | 99.5% |
| Somchem S385 | <<locked>> | 80% | 51,808 psi | 81% | 2989 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 45,455 psi | 71% | 2864 fps | 99.7% |
| Vihtavuori N170 | <<locked>> | 86% | 47,906 psi | 75% | 2933 fps | 95.3% |
| Vihtavuori N555 | <<locked>> | 80% | 51,517 psi | 81% | 2992 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 50,720 psi | 79% | 3061 fps | 99.3% |
| Vihtavuori N565 | <<locked>> | 80% | 42,482 psi | 67% | 2874 fps | 98% |
| Vihtavuori N568 | <<locked>> | 80% | 37,521 psi | 59% | 2795 fps | 95% |
| Vihtavuori N570 | 103 gr | 86% | 44,483 psi | 70% | 2992 fps | 95.4% |
| Winchester StaBALL HD | <<locked>> | 80% | 46,383 psi | 73% | 2986 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 47,964 psi | 75% | 2923 fps | 99.8% |
Recommended = one of the top powders for this cartridge and bullet combination.
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 57 powders for .30-378 Weath. Mag. loaded with the .308 | 180gr | Norma VULKAN. Hodgdon Retumbo delivers the highest muzzle velocity at 3,248 fps; across all powders the maximum-charge window runs from 2,018 fps to 3,248 fps. Accurate 8700 gives the best case fill at 100 %, and 57 of the 57 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 60–90 %, leaving at least 10 % headroom. The 180.0 gr projectile in 0.308" calls for a 1:15.0 twist; slower twists will usually not stabilise this weight. Accurate 8700, Hodgdon TrailBoss, Hodgdon US 869 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. ADI AR 2218, Vihtavuori N570, Hodgdon Retumbo rank at the top here: for .30-378 Weath. Mag. with the .308 | 180gr | Norma VULKAN they combine a high case fill with complete burn and sit in the upper velocity band. 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.