Load Specifications
Load data in caliber .30-378 Weath. Mag. with .308 | 168gr | Reichenberg HDB Universal bullet and 52 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Hodgdon Retumbo, Vihtavuori N570 and Alliant Reloder-33.
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% | 57,072 psi | 89% | 3143 fps | 100% |
| Accurate MAGPRO | <<locked>> | 86% | 56,420 psi | 88% | 3258 fps | 99.3% |
| ADI AR 2209 | <<locked>> | 84% | 54,839 psi | 86% | 3182 fps | 99.9% |
| ADI AR 2213 | <<locked>> | 88% | 57,232 psi | 90% | 3261 fps | 99.8% |
| ADI AR 2217 | <<locked>> | 96% | 56,101 psi | 88% | 3235 fps | 99.9% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 56,826 psi | 89% | 3356 fps | 98.5% |
| ADI AR 2225 | <<locked>> | 98% | 54,984 psi | 86% | 3251 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 54,433 psi | 85% | 3169 fps | 99.9% |
| Alliant Reloder-22 | <<locked>> | 88% | 57,537 psi | 90% | 3251 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 88% | 55,477 psi | 87% | 3150 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 92% | 56,115 psi | 88% | 3228 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 84% | 56,217 psi | 88% | 3238 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 96% | 54,244 psi | 85% | 3255 fps | 97.7% |
| Alliant Reloder-50ᴾ | <<locked>> | 100% | 53,737 psi | 84% | 3232 fps | 97.1% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 54,070 psi | 85% | 3150 fps | 97.8% |
| Bofors RP15 | <<locked>> | 90% | 56,884 psi | 89% | 3241 fps | 100% |
| Bofors RP30 | <<locked>> | 94% | 55,811 psi | 87% | 3241 fps | 99.9% |
| Bofors RP5 | <<locked>> | 88% | 57,537 psi | 90% | 3251 fps | 100% |
| Hodgdon H1000 | <<locked>> | 94% | 57,609 psi | 90% | 3255 fps | 100% |
| Hodgdon H4831 | <<locked>> | 86% | 56,043 psi | 88% | 3182 fps | 99.4% |
| Hodgdon H4831 SC | <<locked>> | 86% | 55,027 psi | 86% | 3166 fps | 99.3% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 54,984 psi | 86% | 3087 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 92% | 55,259 psi | 87% | 3320 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,579 psi | 59% | 2070 fps | 100% |
| IMR 4350 | <<locked>> | 82% | 56,898 psi | 89% | 3153 fps | 100% |
| IMR 4831 | <<locked>> | 82% | 57,537 psi | 90% | 3153 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 86% | 56,434 psi | 88% | 3163 fps | 99.5% |
| IMR 7828 SSC | <<locked>> | 88% | 55,477 psi | 87% | 3238 fps | 99.7% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 53,838 psi | 84% | 3225 fps | 99.7% |
| Lovex S071 | <<locked>> | 92% | 55,201 psi | 87% | 3114 fps | 100% |
| Norma 217ᴾ | <<locked>> | 100% | 55,158 psi | 86% | 3248 fps | 100% |
| Norma MRP | <<locked>> | 84% | 53,708 psi | 84% | 3202 fps | 100% |
| Ramshot Grand | <<locked>> | 88% | 56,942 psi | 89% | 3264 fps | 99.9% |
| Ramshot Magnum | <<locked>> | 90% | 55,274 psi | 87% | 3182 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,595 psi | 60% | 2119 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 56,159 psi | 88% | 3304 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 94% | 55,434 psi | 87% | 3264 fps | 99.3% |
| Rottweil R 904 | <<locked>> | 84% | 55,230 psi | 87% | 3146 fps | 99.6% |
| Rottweil R 905 | <<locked>> | 84% | 53,969 psi | 85% | 3159 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 57,450 psi | 90% | 3219 fps | 100% |
| Somchem S361 | <<locked>> | 84% | 56,753 psi | 89% | 3136 fps | 99.5% |
| Somchem S365 | <<locked>> | 82% | 57,029 psi | 89% | 3146 fps | 100% |
| Somchem S385 | <<locked>> | 84% | 54,331 psi | 85% | 3123 fps | 100% |
| Vihtavuori N165 | <<locked>> | 88% | 54,447 psi | 85% | 3114 fps | 100% |
| Vihtavuori N170 | <<locked>> | 94% | 57,421 psi | 90% | 3192 fps | 96.8% |
| Vihtavuori N555 | <<locked>> | 86% | 57,159 psi | 90% | 3179 fps | 100% |
| Vihtavuori N560 | <<locked>> | 86% | 57,188 psi | 90% | 3271 fps | 99.6% |
| Vihtavuori N565 | <<locked>> | 90% | 54,085 psi | 85% | 3192 fps | 99.5% |
| Vihtavuori N568 | <<locked>> | 94% | 55,956 psi | 88% | 3268 fps | 99.1% |
| Vihtavuori N570 | <<locked>> | 96% | 57,348 psi | 90% | 3337 fps | 98% |
| Winchester StaBALL HD | <<locked>> | 88% | 55,680 psi | 87% | 3241 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 86% | 54,317 psi | 85% | 3123 fps | 99.9% |
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% | 43,207 psi | 68% | 2900 fps | 99.9% |
| Accurate MAGPRO | <<locked>> | 80% | 45,237 psi | 71% | 3041 fps | 97.2% |
| ADI AR 2209 | <<locked>> | 80% | 47,645 psi | 75% | 3051 fps | 99.4% |
| ADI AR 2213 | <<locked>> | 80% | 42,902 psi | 67% | 2982 fps | 97.6% |
| ADI AR 2217 | <<locked>> | 84% | 36,521 psi | 57% | 2825 fps | 96% |
| ADI AR 2218 | <<locked>> | 94% | 45,121 psi | 71% | 3110 fps | 95.1% |
| ADI AR 2225 | <<locked>> | 80% | 28,979 psi | 45% | 2644 fps | 95.5% |
| Alliant Reloder-19 | <<locked>> | 80% | 47,514 psi | 74% | 3041 fps | 99.3% |
| Alliant Reloder-22 | <<locked>> | 80% | 43,555 psi | 68% | 2986 fps | 98.8% |
| Alliant Reloder-23 | <<locked>> | 80% | 42,322 psi | 66% | 2923 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 36,506 psi | 57% | 2848 fps | 99.6% |
| Alliant Reloder-26 | <<locked>> | 80% | 48,196 psi | 76% | 3104 fps | 100% |
| Alliant Reloder-33 | 112.9 gr | 92% | 46,325 psi | 73% | 3097 fps | 95.6% |
| Alliant Reloder-50 | <<locked>> | 98% | 49,763 psi | 78% | 3159 fps | 96.1% |
| Baschieri & Pellagri 109 | <<locked>> | 82% | 44,280 psi | 69% | 2953 fps | 95.3% |
| Bofors RP15 | <<locked>> | 80% | 40,553 psi | 64% | 2920 fps | 98% |
| Bofors RP30 | <<locked>> | 82% | 36,521 psi | 57% | 2838 fps | 96.1% |
| Bofors RP5 | <<locked>> | 80% | 43,555 psi | 68% | 2986 fps | 98.8% |
| Hodgdon H1000 | <<locked>> | 80% | 34,548 psi | 54% | 2772 fps | 95.8% |
| Hodgdon H4831 | <<locked>> | 80% | 45,484 psi | 71% | 2986 fps | 97.7% |
| Hodgdon H4831 SC | <<locked>> | 80% | 44,643 psi | 70% | 2969 fps | 97.5% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 51,430 psi | 81% | 3028 fps | 100% |
| Hodgdon Retumbo | 91 gr | 80% | 35,665 psi | 56% | 2890 fps | 97.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,195 psi | 44% | 1857 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 53,258 psi | 83% | 3094 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 53,954 psi | 85% | 3100 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 46,369 psi | 73% | 2976 fps | 98.1% |
| IMR 7828 SSC | <<locked>> | 80% | 41,597 psi | 65% | 2959 fps | 97.3% |
| IMR 8133 Enduron | <<locked>> | 88% | 35,215 psi | 55% | 2818 fps | 95.3% |
| Lovex S071 | <<locked>> | 80% | 37,072 psi | 58% | 2762 fps | 99.1% |
| Norma 217 | <<locked>> | 84% | 30,719 psi | 48% | 2710 fps | 95.6% |
| Norma MRP | <<locked>> | 80% | 46,470 psi | 73% | 3068 fps | 99.8% |
| Ramshot Grand | <<locked>> | 80% | 41,800 psi | 66% | 2976 fps | 97.8% |
| Ramshot Magnum | <<locked>> | 80% | 37,594 psi | 59% | 2838 fps | 98.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,921 psi | 45% | 1900 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 34,983 psi | 55% | 2858 fps | 98.3% |
| ReloadSwiss RS 80 | <<locked>> | 86% | 40,538 psi | 64% | 2959 fps | 96% |
| Rottweil R 904 | <<locked>> | 80% | 48,486 psi | 76% | 3025 fps | 98.8% |
| Rottweil R 905 | <<locked>> | 80% | 47,210 psi | 74% | 3031 fps | 99.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 46,862 psi | 73% | 3028 fps | 99.3% |
| Somchem S361 | <<locked>> | 80% | 49,414 psi | 77% | 3009 fps | 98.5% |
| Somchem S365 | <<locked>> | 80% | 53,185 psi | 83% | 3091 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 47,442 psi | 74% | 3002 fps | 99.7% |
| Vihtavuori N165 | <<locked>> | 80% | 41,423 psi | 65% | 2867 fps | 98.8% |
| Vihtavuori N170 | <<locked>> | 90% | 49,995 psi | 78% | 3058 fps | 95% |
| Vihtavuori N555 | <<locked>> | 80% | 46,847 psi | 73% | 3009 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 46,137 psi | 72% | 3061 fps | 98% |
| Vihtavuori N565 | <<locked>> | 80% | 38,043 psi | 60% | 2851 fps | 95.8% |
| Vihtavuori N568 | <<locked>> | 86% | 41,640 psi | 65% | 2979 fps | 95.7% |
| Vihtavuori N570 | 106.3 gr | 90% | 45,861 psi | 72% | 3110 fps | 95% |
| Winchester StaBALL HD | <<locked>> | 80% | 40,756 psi | 64% | 2979 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 43,816 psi | 69% | 2927 fps | 98.8% |
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 52 powders for .30-378 Weath. Mag. loaded with the .308 | 168gr | Reichenberg HDB Universal. ADI AR 2218 delivers the highest muzzle velocity at 3,356 fps; across all powders the maximum-charge window runs from 2,070 fps to 3,356 fps. ADI AR 2218 gives the best case fill at 100 %, and 52 of the 52 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 168.0 gr projectile in 0.308" calls for a 1:12.5 twist; slower twists will usually not stabilise this weight. ADI AR 2218, 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. Hodgdon Retumbo, Vihtavuori N570, Alliant Reloder-33 rank at the top here: for .30-378 Weath. Mag. with the .308 | 168gr | Reichenberg HDB Universal they combine a high case fill with complete burn and sit in the upper velocity band. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.