Load Specifications
Load data in caliber .30-378 Weath. Mag. with .308 | 165gr | Reichenberg Spezial Jagd bullet and 52 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>> | 88% | 57,609 psi | 90% | 3173 fps | 100% |
| Accurate High Country | <<locked>> | 84% | 55,854 psi | 88% | 3281 fps | 99.7% |
| Accurate MAGPRO | <<locked>> | 86% | 57,029 psi | 89% | 3291 fps | 99.3% |
| ADI AR 2209 | <<locked>> | 84% | 55,288 psi | 87% | 3215 fps | 99.9% |
| ADI AR 2213 | <<locked>> | 88% | 57,740 psi | 90% | 3291 fps | 99.8% |
| ADI AR 2217 | <<locked>> | 96% | 56,623 psi | 89% | 3261 fps | 99.9% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 57,522 psi | 90% | 3389 fps | 98.5% |
| ADI AR 2225 | <<locked>> | 98% | 55,811 psi | 87% | 3284 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 54,853 psi | 86% | 3199 fps | 99.9% |
| Alliant Reloder-22 | <<locked>> | 86% | 54,273 psi | 85% | 3219 fps | 99.9% |
| Alliant Reloder-23 | <<locked>> | 88% | 56,086 psi | 88% | 3179 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 92% | 56,594 psi | 89% | 3258 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 84% | 56,927 psi | 89% | 3271 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 96% | 54,882 psi | 86% | 3287 fps | 97.8% |
| Alliant Reloder-50ᴾ | <<locked>> | 100% | 54,607 psi | 86% | 3268 fps | 97.2% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 54,534 psi | 85% | 3182 fps | 97.9% |
| Bofors RP15 | <<locked>> | 90% | 57,392 psi | 90% | 3271 fps | 100% |
| Bofors RP30 | <<locked>> | 94% | 56,347 psi | 88% | 3271 fps | 99.9% |
| Bofors RP5 | <<locked>> | 86% | 54,273 psi | 85% | 3219 fps | 99.9% |
| Hodgdon H1000 | <<locked>> | 92% | 54,244 psi | 85% | 3222 fps | 99.9% |
| Hodgdon H4831 | <<locked>> | 86% | 56,536 psi | 89% | 3215 fps | 99.4% |
| Hodgdon H4831 SC | <<locked>> | 86% | 55,550 psi | 87% | 3199 fps | 99.3% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 55,390 psi | 87% | 3114 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 92% | 55,912 psi | 88% | 3353 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,637 psi | 59% | 2096 fps | 100% |
| IMR 4350 | <<locked>> | 82% | 57,348 psi | 90% | 3186 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 86% | 56,913 psi | 89% | 3196 fps | 99.5% |
| IMR 7828 SSC | <<locked>> | 88% | 56,028 psi | 88% | 3268 fps | 99.7% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 54,607 psi | 86% | 3255 fps | 99.8% |
| Lovex S071 | <<locked>> | 92% | 55,753 psi | 87% | 3146 fps | 100% |
| Norma 217ᴾ | <<locked>> | 100% | 55,811 psi | 87% | 3281 fps | 100% |
| Norma MRP | <<locked>> | 84% | 54,259 psi | 85% | 3232 fps | 100% |
| Ramshot Grand | <<locked>> | 88% | 57,450 psi | 90% | 3294 fps | 99.9% |
| Ramshot Magnum | <<locked>> | 90% | 55,956 psi | 88% | 3215 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,638 psi | 61% | 2146 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 57,043 psi | 89% | 3337 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 94% | 56,115 psi | 88% | 3294 fps | 99.4% |
| Rottweil R 904 | <<locked>> | 84% | 55,666 psi | 87% | 3179 fps | 99.6% |
| Rottweil R 905 | <<locked>> | 84% | 54,433 psi | 85% | 3186 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 54,056 psi | 85% | 3186 fps | 99.9% |
| Somchem S361 | <<locked>> | 84% | 57,159 psi | 90% | 3169 fps | 99.5% |
| Somchem S365 | <<locked>> | 82% | 57,609 psi | 90% | 3179 fps | 100% |
| Somchem S385 | <<locked>> | 84% | 54,708 psi | 86% | 3156 fps | 100% |
| Vihtavuori N165 | <<locked>> | 88% | 54,911 psi | 86% | 3143 fps | 100% |
| Vihtavuori N170 | <<locked>> | 92% | 54,041 psi | 85% | 3153 fps | 96% |
| Vihtavuori N555 | <<locked>> | 84% | 54,041 psi | 85% | 3156 fps | 100% |
| Vihtavuori N560 | <<locked>> | 86% | 57,638 psi | 90% | 3304 fps | 99.6% |
| Vihtavuori N565 | <<locked>> | 90% | 54,679 psi | 86% | 3222 fps | 99.5% |
| Vihtavuori N568 | <<locked>> | 94% | 56,550 psi | 89% | 3297 fps | 99.1% |
| Vihtavuori N570 | <<locked>> | 94% | 53,983 psi | 85% | 3297 fps | 97.2% |
| Winchester StaBALL HD | <<locked>> | 88% | 56,492 psi | 89% | 3274 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 86% | 54,781 psi | 86% | 3153 fps | 99.9% |
Start Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 80% | 43,700 psi | 68% | 2930 fps | 99.9% |
| Accurate High Country | <<locked>> | 80% | 48,399 psi | 76% | 3140 fps | 98.8% |
| Accurate MAGPRO | <<locked>> | 80% | 45,788 psi | 72% | 3074 fps | 97.2% |
| ADI AR 2209 | <<locked>> | 80% | 48,182 psi | 76% | 3084 fps | 99.4% |
| ADI AR 2213 | <<locked>> | 80% | 43,366 psi | 68% | 3015 fps | 97.7% |
| ADI AR 2217 | <<locked>> | 84% | 36,883 psi | 58% | 2851 fps | 96% |
| ADI AR 2218 | <<locked>> | 94% | 45,701 psi | 72% | 3140 fps | 95.2% |
| ADI AR 2225 | <<locked>> | 80% | 29,356 psi | 46% | 2674 fps | 95.6% |
| Alliant Reloder-19 | <<locked>> | 80% | 48,022 psi | 75% | 3071 fps | 99.4% |
| Alliant Reloder-22 | <<locked>> | 80% | 44,019 psi | 69% | 3018 fps | 98.8% |
| Alliant Reloder-23 | <<locked>> | 80% | 42,743 psi | 67% | 2953 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 36,985 psi | 58% | 2881 fps | 99.6% |
| Alliant Reloder-26 | <<locked>> | 80% | 48,776 psi | 76% | 3136 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 92% | 47,007 psi | 74% | 3130 fps | 95.7% |
| Alliant Reloder-50 | <<locked>> | 96% | 46,717 psi | 73% | 3110 fps | 95% |
| Baschieri & Pellagri 109 | <<locked>> | 82% | 44,657 psi | 70% | 2982 fps | 95.3% |
| Bofors RP15 | <<locked>> | 80% | 40,915 psi | 64% | 2946 fps | 98% |
| Bofors RP30 | <<locked>> | 82% | 36,941 psi | 58% | 2864 fps | 96.1% |
| Bofors RP5 | <<locked>> | 80% | 44,019 psi | 69% | 3018 fps | 98.8% |
| Hodgdon H1000 | <<locked>> | 80% | 34,940 psi | 55% | 2805 fps | 95.9% |
| Hodgdon H4831 | <<locked>> | 80% | 45,934 psi | 72% | 3015 fps | 97.7% |
| Hodgdon H4831 SC | <<locked>> | 80% | 45,092 psi | 71% | 2999 fps | 97.5% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 51,866 psi | 81% | 3061 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 80% | 36,085 psi | 57% | 2920 fps | 97.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,181 psi | 44% | 1877 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 53,780 psi | 84% | 3127 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 46,818 psi | 73% | 3005 fps | 98.1% |
| IMR 7828 SSC | <<locked>> | 80% | 42,090 psi | 66% | 2992 fps | 97.4% |
| IMR 8133 Enduron | <<locked>> | 88% | 35,694 psi | 56% | 2848 fps | 95.4% |
| Lovex S071 | <<locked>> | 80% | 37,362 psi | 59% | 2789 fps | 99.1% |
| Norma 217 | <<locked>> | 84% | 31,125 psi | 49% | 2736 fps | 95.7% |
| Norma MRP | <<locked>> | 80% | 46,920 psi | 74% | 3094 fps | 99.8% |
| Ramshot Grand | <<locked>> | 80% | 42,279 psi | 66% | 3005 fps | 97.8% |
| Ramshot Magnum | <<locked>> | 80% | 37,971 psi | 60% | 2864 fps | 98.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,906 psi | 45% | 1923 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 35,433 psi | 56% | 2887 fps | 98.4% |
| ReloadSwiss RS 80 | <<locked>> | 86% | 41,017 psi | 64% | 2986 fps | 96% |
| Rottweil R 904 | <<locked>> | 80% | 48,834 psi | 77% | 3054 fps | 98.8% |
| Rottweil R 905 | <<locked>> | 80% | 47,572 psi | 75% | 3061 fps | 99.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 47,239 psi | 74% | 3058 fps | 99.3% |
| Somchem S361 | <<locked>> | 80% | 49,864 psi | 78% | 3038 fps | 98.6% |
| Somchem S365 | <<locked>> | 80% | 53,766 psi | 84% | 3123 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 47,906 psi | 75% | 3031 fps | 99.8% |
| Vihtavuori N165 | <<locked>> | 80% | 41,872 psi | 66% | 2897 fps | 98.8% |
| Vihtavuori N170 | <<locked>> | 90% | 50,430 psi | 79% | 3084 fps | 95.1% |
| Vihtavuori N555 | <<locked>> | 80% | 47,282 psi | 74% | 3038 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 46,572 psi | 73% | 3094 fps | 98% |
| Vihtavuori N565 | <<locked>> | 80% | 38,464 psi | 60% | 2881 fps | 95.8% |
| Vihtavuori N568 | <<locked>> | 86% | 42,177 psi | 66% | 3009 fps | 95.8% |
| Vihtavuori N570 | <<locked>> | 90% | 46,383 psi | 73% | 3140 fps | 95% |
| Winchester StaBALL HD | <<locked>> | 80% | 41,336 psi | 65% | 3009 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 44,266 psi | 69% | 2956 fps | 98.8% |
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 | 165gr | Reichenberg Spezial Jagd. ADI AR 2218 delivers the highest muzzle velocity at 3,389 fps; across all powders the maximum-charge window runs from 2,096 fps to 3,389 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 165.0 gr projectile in 0.308" calls for a 1:14.5 twist; slower twists will usually not stabilise this weight. Accurate 8700, ADI AR 2218, Alliant Reloder-50 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, Accurate 8700, IMR 7977 Enduron, Lovex D100 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.