Load Specifications
Load data in caliber .30-378 Weath. Mag. with .308 | 190gr | Berger VLD Target 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>> | 84% | 55,187 psi | 86% | 2949 fps | 100% |
| Accurate 8700ᴾ | <<locked>> | 100% | 50,415 psi | 79% | 2982 fps | 97.5% |
| Accurate High Country | <<locked>> | 82% | 57,058 psi | 89% | 3114 fps | 100% |
| Accurate MAGPRO | <<locked>> | 82% | 54,186 psi | 85% | 3061 fps | 99.6% |
| ADI AR 2209 | <<locked>> | 82% | 55,840 psi | 88% | 3035 fps | 100% |
| ADI AR 2213 | <<locked>> | 84% | 54,752 psi | 86% | 3054 fps | 100% |
| ADI AR 2217 | <<locked>> | 92% | 54,186 psi | 85% | 3041 fps | 100% |
| ADI AR 2218 | <<locked>> | 96% | 54,476 psi | 85% | 3166 fps | 99% |
| ADI AR 2225 | <<locked>> | 96% | 57,595 psi | 90% | 3123 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 55,506 psi | 87% | 3025 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 84% | 55,361 psi | 87% | 3051 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 86% | 57,348 psi | 90% | 3005 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 88% | 54,404 psi | 85% | 3031 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 94% | 56,652 psi | 89% | 3146 fps | 99% |
| Alliant Reloder-50 | <<locked>> | 98% | 56,623 psi | 89% | 3136 fps | 98.7% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 54,984 psi | 86% | 3015 fps | 98.9% |
| Bofors RP15 | <<locked>> | 86% | 54,766 psi | 86% | 3041 fps | 100% |
| Bofors RP30 | <<locked>> | 90% | 54,157 psi | 85% | 3051 fps | 100% |
| Bofors RP5 | <<locked>> | 84% | 55,361 psi | 87% | 3051 fps | 100% |
| Hodgdon H1000 | <<locked>> | 90% | 55,419 psi | 87% | 3058 fps | 100% |
| Hodgdon H4831 | <<locked>> | 84% | 57,232 psi | 90% | 3045 fps | 99.9% |
| Hodgdon H4831 SC | <<locked>> | 84% | 56,202 psi | 88% | 3028 fps | 99.9% |
| Hodgdon Retumbo | <<locked>> | 88% | 53,780 psi | 84% | 3123 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,956 psi | 59% | 1955 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 84% | 57,159 psi | 90% | 3015 fps | 99.9% |
| IMR 7828 SSC | <<locked>> | 86% | 57,203 psi | 90% | 3100 fps | 100% |
| IMR 7977 Enduron | <<locked>> | 90% | 55,825 psi | 87% | 2969 fps | 96.2% |
| IMR 8133 Enduron | <<locked>> | 98% | 56,507 psi | 89% | 3107 fps | 100% |
| Lovex S071 | <<locked>> | 90% | 57,159 psi | 90% | 2979 fps | 100% |
| Norma 217 | <<locked>> | 96% | 54,230 psi | 85% | 3071 fps | 100% |
| Norma MRP | <<locked>> | 82% | 55,448 psi | 87% | 3061 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 54,650 psi | 86% | 3061 fps | 100% |
| Ramshot Magnum | <<locked>> | 88% | 57,101 psi | 89% | 3048 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 39,088 psi | 61% | 2005 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 54,534 psi | 85% | 3110 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 90% | 53,635 psi | 84% | 3077 fps | 99.7% |
| Rottweil R 904 | <<locked>> | 82% | 56,130 psi | 88% | 3002 fps | 100% |
| Rottweil R 905 | <<locked>> | 82% | 55,376 psi | 87% | 3018 fps | 100% |
| SNPE Vectan SP 13ᴾ | <<locked>> | 100% | 52,373 psi | 82% | 2992 fps | 97.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 55,027 psi | 86% | 3012 fps | 100% |
| Somchem S361 | <<locked>> | 82% | 57,551 psi | 90% | 2995 fps | 99.9% |
| Somchem S385 | <<locked>> | 82% | 55,666 psi | 87% | 2982 fps | 100% |
| Vihtavuori N165 | <<locked>> | 86% | 55,840 psi | 88% | 2976 fps | 100% |
| Vihtavuori N170 | <<locked>> | 90% | 55,158 psi | 86% | 3005 fps | 97.5% |
| Vihtavuori N555 | <<locked>> | 82% | 55,347 psi | 87% | 2979 fps | 100% |
| Vihtavuori N560 | <<locked>> | 82% | 54,781 psi | 86% | 3068 fps | 99.8% |
| Vihtavuori N565 | <<locked>> | 88% | 56,202 psi | 88% | 3068 fps | 100% |
| Vihtavuori N568 | <<locked>> | 90% | 54,128 psi | 85% | 3081 fps | 99.5% |
| Vihtavuori N570 | <<locked>> | 92% | 55,608 psi | 87% | 3150 fps | 98.6% |
| Winchester StaBALL HD | <<locked>> | 84% | 54,418 psi | 85% | 3045 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 84% | 55,434 psi | 87% | 2982 fps | 100% |
Start Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 80% | 48,211 psi | 76% | 2838 fps | 100% |
| Accurate 8700 | <<locked>> | 96% | 43,555 psi | 68% | 2848 fps | 95.6% |
| Accurate High Country | <<locked>> | 80% | 53,287 psi | 84% | 3051 fps | 99.9% |
| Accurate MAGPRO | <<locked>> | 80% | 50,444 psi | 79% | 2992 fps | 99.2% |
| ADI AR 2209 | <<locked>> | 80% | 52,272 psi | 82% | 2976 fps | 100% |
| ADI AR 2213 | <<locked>> | 80% | 47,645 psi | 75% | 2927 fps | 99.4% |
| ADI AR 2217 | <<locked>> | 80% | 35,534 psi | 56% | 2664 fps | 97.1% |
| ADI AR 2218 | <<locked>> | 88% | 40,582 psi | 64% | 2864 fps | 95% |
| ADI AR 2225 | <<locked>> | 80% | 32,924 psi | 52% | 2638 fps | 98.9% |
| Alliant Reloder-19 | <<locked>> | 80% | 52,054 psi | 82% | 2966 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 80% | 48,399 psi | 76% | 2930 fps | 99.9% |
| Alliant Reloder-23 | <<locked>> | 80% | 47,152 psi | 74% | 2851 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 41,263 psi | 65% | 2802 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 86% | 41,959 psi | 66% | 2861 fps | 95.6% |
| Alliant Reloder-50 | <<locked>> | 90% | 42,119 psi | 66% | 2854 fps | 95% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 45,121 psi | 71% | 2831 fps | 96.9% |
| Bofors RP15 | <<locked>> | 80% | 44,991 psi | 71% | 2861 fps | 99.6% |
| Bofors RP30 | <<locked>> | 80% | 38,566 psi | 60% | 2746 fps | 98% |
| Bofors RP5 | <<locked>> | 80% | 48,399 psi | 76% | 2930 fps | 99.9% |
| Hodgdon H1000 | <<locked>> | 80% | 38,798 psi | 61% | 2746 fps | 98.6% |
| Hodgdon H4831 | <<locked>> | 80% | 49,864 psi | 78% | 2920 fps | 99.3% |
| Hodgdon H4831 SC | <<locked>> | 80% | 49,124 psi | 77% | 2907 fps | 99.3% |
| Hodgdon Retumbo | <<locked>> | 80% | 40,422 psi | 63% | 2867 fps | 99.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,529 psi | 45% | 1749 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 50,415 psi | 79% | 2904 fps | 99.5% |
| IMR 7828 SSC | <<locked>> | 80% | 46,427 psi | 73% | 2913 fps | 99.3% |
| IMR 7977 Enduron | <<locked>> | 88% | 52,373 psi | 82% | 2910 fps | 95.4% |
| IMR 8133 Enduron | <<locked>> | 82% | 32,692 psi | 51% | 2615 fps | 95.7% |
| Lovex S071 | <<locked>> | 80% | 41,669 psi | 65% | 2717 fps | 100% |
| Norma 217 | <<locked>> | 80% | 30,850 psi | 48% | 2579 fps | 97.2% |
| Norma MRP | <<locked>> | 80% | 51,721 psi | 81% | 3002 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 47,094 psi | 74% | 2930 fps | 99.6% |
| Ramshot Magnum | <<locked>> | 80% | 42,409 psi | 66% | 2799 fps | 99.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,356 psi | 46% | 1795 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 39,987 psi | 63% | 2841 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 80% | 36,854 psi | 58% | 2726 fps | 96% |
| Rottweil R 904 | <<locked>> | 80% | 52,620 psi | 82% | 2946 fps | 99.8% |
| Rottweil R 905 | <<locked>> | 80% | 51,866 psi | 81% | 2959 fps | 100% |
| SNPE Vectan SP 13 | <<locked>> | 96% | 45,585 psi | 71% | 2864 fps | 95.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 51,517 psi | 81% | 2953 fps | 100% |
| Somchem S361 | <<locked>> | 80% | 53,795 psi | 84% | 2933 fps | 99.7% |
| Somchem S385 | <<locked>> | 80% | 52,214 psi | 82% | 2930 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 45,832 psi | 72% | 2805 fps | 99.9% |
| Vihtavuori N170 | <<locked>> | 84% | 45,005 psi | 71% | 2815 fps | 95% |
| Vihtavuori N555 | <<locked>> | 80% | 52,025 psi | 82% | 2930 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 51,140 psi | 80% | 3005 fps | 99.6% |
| Vihtavuori N565 | <<locked>> | 80% | 42,786 psi | 67% | 2818 fps | 98.4% |
| Vihtavuori N568 | <<locked>> | 80% | 37,927 psi | 59% | 2746 fps | 95.8% |
| Vihtavuori N570 | <<locked>> | 84% | 41,669 psi | 65% | 2871 fps | 95% |
| Winchester StaBALL HD | <<locked>> | 80% | 46,818 psi | 73% | 2927 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 48,283 psi | 76% | 2861 fps | 99.9% |
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 58 powders for .30-378 Weath. Mag. loaded with the .308 | 190gr | Berger VLD Target. ADI AR 2218 delivers the highest muzzle velocity at 3,166 fps; across all powders the maximum-charge window runs from 1,955 fps to 3,166 fps. Accurate 8700 gives the best case fill at 100 %, and 58 of the 58 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 190.0 gr projectile in 0.308" calls for a 1:12.0 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. As outliers, Hodgdon 50BMG, Hodgdon US 869, 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.