Load Specifications
Load data in caliber .30-378 Weath. Mag. with .308 | 185gr | Reichenberg HDB Universal bullet and 53 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% | 56,173 psi | 88% | 3002 fps | 100% |
| Accurate 8700ᴾ | <<locked>> | 100% | 47,645 psi | 75% | 2963 fps | 96.5% |
| Accurate High Country | <<locked>> | 82% | 54,462 psi | 85% | 3110 fps | 99.9% |
| Accurate MAGPRO | <<locked>> | 84% | 55,564 psi | 87% | 3123 fps | 99.6% |
| ADI AR 2209 | <<locked>> | 84% | 57,609 psi | 90% | 3100 fps | 100% |
| ADI AR 2213 | <<locked>> | 86% | 56,217 psi | 88% | 3117 fps | 100% |
| ADI AR 2217 | <<locked>> | 94% | 55,492 psi | 87% | 3100 fps | 100% |
| ADI AR 2218 | <<locked>> | 98% | 55,999 psi | 88% | 3232 fps | 99.1% |
| ADI AR 2225 | <<locked>> | 96% | 54,694 psi | 86% | 3117 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 57,130 psi | 90% | 3087 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 86% | 56,623 psi | 89% | 3107 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 86% | 54,839 psi | 86% | 3009 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 90% | 55,521 psi | 87% | 3087 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 82% | 55,434 psi | 87% | 3097 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 94% | 53,693 psi | 84% | 3130 fps | 98.4% |
| Alliant Reloder-50ᴾ | <<locked>> | 100% | 57,522 psi | 90% | 3186 fps | 98.6% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 56,594 psi | 89% | 3077 fps | 98.9% |
| Bofors RP15 | <<locked>> | 88% | 56,159 psi | 88% | 3100 fps | 100% |
| Bofors RP30 | <<locked>> | 92% | 55,274 psi | 87% | 3110 fps | 100% |
| Bofors RP5 | <<locked>> | 86% | 56,623 psi | 89% | 3107 fps | 100% |
| Hodgdon H1000 | <<locked>> | 92% | 56,985 psi | 89% | 3120 fps | 100% |
| Hodgdon H4831 | <<locked>> | 84% | 55,027 psi | 86% | 3045 fps | 99.7% |
| Hodgdon H4831 SC | <<locked>> | 84% | 54,012 psi | 85% | 3028 fps | 99.6% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 57,740 psi | 90% | 2995 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 90% | 54,998 psi | 86% | 3182 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,811 psi | 59% | 1978 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 84% | 55,347 psi | 87% | 3022 fps | 99.8% |
| IMR 7828 SSC | <<locked>> | 86% | 54,766 psi | 86% | 3100 fps | 99.9% |
| IMR 7977 Enduron | <<locked>> | 92% | 57,653 psi | 90% | 3031 fps | 96.3% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 57,464 psi | 90% | 3159 fps | 100% |
| Lovex S071 | <<locked>> | 90% | 54,476 psi | 85% | 2976 fps | 100% |
| Norma 217 | <<locked>> | 98% | 54,940 psi | 86% | 3120 fps | 100% |
| Norma MRP | <<locked>> | 84% | 56,768 psi | 89% | 3123 fps | 100% |
| Ramshot Grand | <<locked>> | 86% | 56,057 psi | 88% | 3123 fps | 100% |
| Ramshot Magnum | <<locked>> | 88% | 54,375 psi | 85% | 3045 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,769 psi | 61% | 2024 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 55,811 psi | 87% | 3166 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 92% | 54,723 psi | 86% | 3133 fps | 99.7% |
| Rottweil R 904 | <<locked>> | 82% | 54,273 psi | 85% | 3012 fps | 99.9% |
| Rottweil R 905 | <<locked>> | 84% | 56,942 psi | 89% | 3081 fps | 100% |
| SNPE Vectan SP 13ᴾ | <<locked>> | 100% | 49,676 psi | 78% | 2976 fps | 96.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 56,565 psi | 89% | 3074 fps | 100% |
| Somchem S361 | <<locked>> | 82% | 55,448 psi | 87% | 2999 fps | 99.7% |
| Somchem S385 | <<locked>> | 84% | 57,072 psi | 89% | 3045 fps | 100% |
| Vihtavuori N165 | <<locked>> | 88% | 57,174 psi | 90% | 3031 fps | 100% |
| Vihtavuori N170 | <<locked>> | 92% | 56,405 psi | 88% | 3061 fps | 97.5% |
| Vihtavuori N555 | <<locked>> | 84% | 56,391 psi | 88% | 3035 fps | 100% |
| Vihtavuori N560 | <<locked>> | 84% | 56,173 psi | 88% | 3130 fps | 99.9% |
| Vihtavuori N565 | <<locked>> | 90% | 57,348 psi | 90% | 3123 fps | 100% |
| Vihtavuori N568 | <<locked>> | 92% | 55,361 psi | 87% | 3136 fps | 99.5% |
| Vihtavuori N570 | <<locked>> | 94% | 56,710 psi | 89% | 3205 fps | 98.6% |
| Winchester StaBALL HD | <<locked>> | 86% | 55,419 psi | 87% | 3100 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 86% | 57,058 psi | 89% | 3045 fps | 100% |
Start Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 80% | 45,716 psi | 72% | 2831 fps | 100% |
| Accurate 8700 | <<locked>> | 98% | 44,208 psi | 69% | 2894 fps | 95.5% |
| Accurate High Country | <<locked>> | 80% | 50,763 psi | 80% | 3045 fps | 99.7% |
| Accurate MAGPRO | <<locked>> | 80% | 47,993 psi | 75% | 2982 fps | 98.6% |
| ADI AR 2209 | <<locked>> | 80% | 50,183 psi | 79% | 2976 fps | 99.9% |
| ADI AR 2213 | <<locked>> | 80% | 45,484 psi | 71% | 2923 fps | 98.9% |
| ADI AR 2217 | <<locked>> | 80% | 33,605 psi | 53% | 2644 fps | 95.9% |
| ADI AR 2218 | <<locked>> | 92% | 44,483 psi | 70% | 2989 fps | 96.2% |
| ADI AR 2225 | <<locked>> | 80% | 30,908 psi | 48% | 2608 fps | 97.8% |
| Alliant Reloder-19 | <<locked>> | 80% | 49,980 psi | 78% | 2966 fps | 99.9% |
| Alliant Reloder-22 | <<locked>> | 80% | 46,151 psi | 72% | 2923 fps | 99.7% |
| Alliant Reloder-23 | <<locked>> | 80% | 44,846 psi | 70% | 2848 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 38,986 psi | 61% | 2792 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 80% | 51,387 psi | 81% | 3031 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 88% | 42,569 psi | 67% | 2907 fps | 95.4% |
| Alliant Reloder-50 | <<locked>> | 94% | 45,716 psi | 72% | 2966 fps | 95.9% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 43,511 psi | 68% | 2831 fps | 96.1% |
| Bofors RP15 | <<locked>> | 80% | 42,801 psi | 67% | 2854 fps | 99.2% |
| Bofors RP30 | <<locked>> | 80% | 36,260 psi | 57% | 2723 fps | 97% |
| Bofors RP5 | <<locked>> | 80% | 46,151 psi | 72% | 2923 fps | 99.7% |
| Hodgdon H1000 | <<locked>> | 80% | 36,753 psi | 58% | 2730 fps | 97.8% |
| Hodgdon H4831 | <<locked>> | 80% | 47,964 psi | 75% | 2920 fps | 98.9% |
| Hodgdon H4831 SC | <<locked>> | 80% | 47,079 psi | 74% | 2904 fps | 98.8% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 53,983 psi | 85% | 2940 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 80% | 38,130 psi | 60% | 2848 fps | 99.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,369 psi | 44% | 1772 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 48,544 psi | 76% | 2904 fps | 99.1% |
| IMR 7828 SSC | <<locked>> | 80% | 44,208 psi | 69% | 2904 fps | 98.8% |
| IMR 7977 Enduron | <<locked>> | 90% | 53,998 psi | 85% | 2969 fps | 95.4% |
| IMR 8133 Enduron | <<locked>> | 84% | 32,735 psi | 51% | 2648 fps | 95.3% |
| Lovex S071 | <<locked>> | 80% | 39,305 psi | 62% | 2703 fps | 99.8% |
| Norma 217 | <<locked>> | 80% | 28,645 psi | 45% | 2543 fps | 95.7% |
| Norma MRP | <<locked>> | 80% | 49,255 psi | 77% | 2995 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 44,657 psi | 70% | 2920 fps | 99.1% |
| Ramshot Magnum | <<locked>> | 80% | 40,030 psi | 63% | 2782 fps | 99.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,153 psi | 46% | 1814 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 37,536 psi | 59% | 2818 fps | 99.6% |
| ReloadSwiss RS 80 | <<locked>> | 82% | 37,173 psi | 58% | 2769 fps | 95.7% |
| Rottweil R 904 | <<locked>> | 80% | 50,807 psi | 80% | 2949 fps | 99.6% |
| Rottweil R 905 | <<locked>> | 80% | 49,617 psi | 78% | 2956 fps | 99.9% |
| SNPE Vectan SP 13 | <<locked>> | 98% | 46,253 psi | 72% | 2910 fps | 95.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 49,284 psi | 77% | 2953 fps | 99.9% |
| Somchem S361 | <<locked>> | 80% | 51,793 psi | 81% | 2936 fps | 99.4% |
| Somchem S385 | <<locked>> | 80% | 49,937 psi | 78% | 2927 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 43,729 psi | 69% | 2802 fps | 99.6% |
| Vihtavuori N170 | <<locked>> | 88% | 49,226 psi | 77% | 2933 fps | 95.9% |
| Vihtavuori N555 | <<locked>> | 80% | 49,501 psi | 78% | 2927 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 48,805 psi | 76% | 2999 fps | 99.1% |
| Vihtavuori N565 | <<locked>> | 80% | 40,393 psi | 63% | 2802 fps | 97.6% |
| Vihtavuori N568 | <<locked>> | 82% | 38,319 psi | 60% | 2789 fps | 95.6% |
| Vihtavuori N570 | <<locked>> | 88% | 45,585 psi | 71% | 2989 fps | 96% |
| Winchester StaBALL HD | <<locked>> | 80% | 43,961 psi | 69% | 2917 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 46,122 psi | 72% | 2858 fps | 99.6% |
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 | 185gr | Reichenberg HDB Universal. ADI AR 2218 delivers the highest muzzle velocity at 3,232 fps; across all powders the maximum-charge window runs from 1,978 fps to 3,232 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 185.0 gr projectile in 0.308" calls for a 1:11.5 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.