Load Specifications
Load data in caliber .30-378 Weath. Mag. with .308 | 154gr | MEN SF bullet and 56 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Vihtavuori N570, Hodgdon Retumbo and ReloadSwiss RS 76.
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.
A valid access license is required to use the Personalized Load Calculator.
You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 88% | 55,637 psi | 87% | 3228 fps | 100% |
| Accurate MAGPRO | <<locked>> | 86% | 54,534 psi | 85% | 3330 fps | 98.5% |
| ADI AR 2209 | <<locked>> | 86% | 56,826 psi | 89% | 3323 fps | 99.8% |
| ADI AR 2213 | <<locked>> | 88% | 55,230 psi | 87% | 3333 fps | 99.3% |
| ADI AR 2217 | <<locked>> | 96% | 54,056 psi | 85% | 3301 fps | 99.5% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 54,650 psi | 86% | 3409 fps | 97.1% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 56,623 psi | 89% | 3389 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 82% | 56,855 psi | 89% | 3317 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 56,391 psi | 88% | 3310 fps | 99.8% |
| Alliant Reloder-22 | <<locked>> | 88% | 55,709 psi | 87% | 3330 fps | 99.8% |
| Alliant Reloder-23 | <<locked>> | 90% | 57,566 psi | 90% | 3294 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 92% | 53,998 psi | 85% | 3307 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 84% | 54,215 psi | 85% | 3320 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 98% | 56,188 psi | 88% | 3392 fps | 97.4% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 56,086 psi | 88% | 3284 fps | 97.5% |
| Bofors RP15 | <<locked>> | 90% | 55,100 psi | 86% | 3317 fps | 99.8% |
| Bofors RP30 | <<locked>> | 94% | 53,940 psi | 85% | 3314 fps | 99.4% |
| Bofors RP5 | <<locked>> | 88% | 55,709 psi | 87% | 3330 fps | 99.8% |
| Hodgdon H1000 | <<locked>> | 94% | 55,463 psi | 87% | 3327 fps | 99.8% |
| Hodgdon H4831 | <<locked>> | 86% | 54,360 psi | 85% | 3258 fps | 98.7% |
| Hodgdon H4831 SC | <<locked>> | 88% | 57,174 psi | 90% | 3307 fps | 99.1% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 57,029 psi | 89% | 3228 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 94% | 56,956 psi | 89% | 3461 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,594 psi | 59% | 2156 fps | 100% |
| IMR 4350 | <<locked>> | 82% | 55,492 psi | 87% | 3241 fps | 100% |
| IMR 4831 | <<locked>> | 82% | 56,159 psi | 88% | 3245 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 86% | 54,940 psi | 86% | 3241 fps | 98.9% |
| IMR 7828 SSC | <<locked>> | 90% | 57,609 psi | 90% | 3383 fps | 99.6% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 51,837 psi | 81% | 3291 fps | 99.2% |
| Lovex S070 | <<locked>> | 82% | 57,551 psi | 90% | 3271 fps | 100% |
| Lovex S071 | <<locked>> | 94% | 57,305 psi | 90% | 3255 fps | 100% |
| Norma 204 | <<locked>> | 82% | 56,710 psi | 89% | 3301 fps | 99.8% |
| Norma 217ᴾ | <<locked>> | 100% | 52,953 psi | 83% | 3320 fps | 100% |
| Norma MRP | <<locked>> | 86% | 55,825 psi | 87% | 3346 fps | 100% |
| Norma URP | <<locked>> | 82% | 57,551 psi | 90% | 3291 fps | 100% |
| Ramshot Grand | <<locked>> | 88% | 54,679 psi | 86% | 3333 fps | 99.5% |
| Ramshot Hunter | <<locked>> | 82% | 56,681 psi | 89% | 3297 fps | 100% |
| Ramshot Magnum | <<locked>> | 92% | 57,508 psi | 90% | 3327 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,464 psi | 60% | 2201 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 53,838 psi | 84% | 3379 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 57,696 psi | 90% | 3406 fps | 99.2% |
| Rottweil R 904 | <<locked>> | 86% | 57,305 psi | 90% | 3291 fps | 99.5% |
| Rottweil R 905 | <<locked>> | 86% | 56,173 psi | 88% | 3304 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 82% | 57,551 psi | 90% | 3271 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 55,767 psi | 87% | 3297 fps | 99.8% |
| Somchem S361 | <<locked>> | 84% | 55,245 psi | 87% | 3212 fps | 98.9% |
| Somchem S365 | <<locked>> | 82% | 55,448 psi | 87% | 3238 fps | 100% |
| Somchem S385 | <<locked>> | 86% | 56,550 psi | 89% | 3268 fps | 100% |
| Vihtavuori N165 | <<locked>> | 90% | 56,507 psi | 89% | 3251 fps | 100% |
| Vihtavuori N555 | <<locked>> | 86% | 55,637 psi | 87% | 3268 fps | 100% |
| Vihtavuori N560 | <<locked>> | 86% | 55,245 psi | 87% | 3343 fps | 99% |
| Vihtavuori N565 | <<locked>> | 92% | 56,231 psi | 88% | 3333 fps | 99.3% |
| Vihtavuori N568 | <<locked>> | 94% | 53,867 psi | 84% | 3333 fps | 98.1% |
| Vihtavuori N570 | <<locked>> | 96% | 55,042 psi | 86% | 3399 fps | 96.7% |
| Winchester StaBALL HD | <<locked>> | 90% | 57,740 psi | 90% | 3389 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 88% | 56,449 psi | 88% | 3261 fps | 99.8% |
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% | 42,409 psi | 66% | 2979 fps | 99.5% |
| Accurate MAGPRO | <<locked>> | 80% | 43,918 psi | 69% | 3110 fps | 95.9% |
| ADI AR 2209 | <<locked>> | 80% | 46,383 psi | 73% | 3127 fps | 98.6% |
| ADI AR 2213 | <<locked>> | 80% | 41,655 psi | 65% | 3051 fps | 96.4% |
| ADI AR 2217 | <<locked>> | 86% | 38,130 psi | 60% | 2956 fps | 95.6% |
| ADI AR 2218 | <<locked>> | 98% | 50,589 psi | 79% | 3323 fps | 95.9% |
| ADI AR 2225 | <<locked>> | 82% | 30,443 psi | 48% | 2772 fps | 95.2% |
| Alliant Reloder-16 | <<locked>> | 80% | 53,214 psi | 83% | 3258 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 46,311 psi | 73% | 3117 fps | 98.6% |
| Alliant Reloder-22 | <<locked>> | 80% | 42,380 psi | 66% | 3061 fps | 97.9% |
| Alliant Reloder-23 | <<locked>> | 80% | 41,075 psi | 64% | 3002 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 35,534 psi | 56% | 2920 fps | 98.9% |
| Alliant Reloder-26 | <<locked>> | 80% | 46,557 psi | 73% | 3182 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 94% | 48,269 psi | 76% | 3235 fps | 95.3% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 49,226 psi | 77% | 3156 fps | 95.9% |
| Bofors RP15 | <<locked>> | 80% | 39,392 psi | 62% | 2986 fps | 96.8% |
| Bofors RP30 | <<locked>> | 84% | 38,145 psi | 60% | 2972 fps | 95.7% |
| Bofors RP5 | <<locked>> | 80% | 42,380 psi | 66% | 3061 fps | 97.9% |
| Hodgdon H1000 | <<locked>> | 82% | 36,187 psi | 57% | 2904 fps | 95.4% |
| Hodgdon H4831 | <<locked>> | 80% | 44,295 psi | 69% | 3054 fps | 96.6% |
| Hodgdon H4831 SC | <<locked>> | 80% | 43,497 psi | 68% | 3038 fps | 96.3% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 50,024 psi | 78% | 3117 fps | 100% |
| Hodgdon Retumbo | 91.9 gr | 80% | 34,693 psi | 54% | 2949 fps | 95.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,195 psi | 44% | 1932 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 52,011 psi | 82% | 3176 fps | 99.8% |
| IMR 4831 | <<locked>> | 80% | 52,547 psi | 82% | 3186 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 45,324 psi | 71% | 3051 fps | 97.1% |
| IMR 7828 SSC | <<locked>> | 80% | 40,364 psi | 63% | 3028 fps | 96% |
| IMR 8133 Enduron | <<locked>> | 90% | 36,695 psi | 57% | 2949 fps | 95% |
| Lovex S070 | <<locked>> | 80% | 54,099 psi | 85% | 3215 fps | 100% |
| Lovex S071 | <<locked>> | 80% | 36,419 psi | 57% | 2841 fps | 98.4% |
| Norma 204 | <<locked>> | 80% | 53,011 psi | 83% | 3235 fps | 99.5% |
| Norma 217 | <<locked>> | 86% | 32,068 psi | 50% | 2838 fps | 95.3% |
| Norma MRP | <<locked>> | 80% | 45,078 psi | 71% | 3143 fps | 99.4% |
| Norma URP | <<locked>> | 80% | 54,012 psi | 85% | 3232 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 40,422 psi | 63% | 3041 fps | 96.5% |
| Ramshot Hunter | <<locked>> | 80% | 53,098 psi | 83% | 3238 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 36,289 psi | 57% | 2897 fps | 97% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,921 psi | 45% | 1978 fps | 100% |
| ReloadSwiss RS 76 | 98.3 gr | 80% | 33,968 psi | 53% | 2917 fps | 97% |
| ReloadSwiss RS 80 | <<locked>> | 88% | 42,235 psi | 66% | 3094 fps | 95.6% |
| Rottweil R 904 | <<locked>> | 80% | 47,210 psi | 74% | 3097 fps | 98% |
| Rottweil R 905 | <<locked>> | 80% | 45,876 psi | 72% | 3107 fps | 98.7% |
| Shooters World SW4350 | <<locked>> | 80% | 54,099 psi | 85% | 3215 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 45,527 psi | 71% | 3100 fps | 98.6% |
| Somchem S361 | <<locked>> | 80% | 48,225 psi | 76% | 3084 fps | 97.6% |
| Somchem S365 | <<locked>> | 80% | 51,764 psi | 81% | 3179 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 46,369 psi | 73% | 3081 fps | 99.3% |
| Vihtavuori N165 | <<locked>> | 80% | 40,437 psi | 63% | 2940 fps | 97.9% |
| Vihtavuori N555 | <<locked>> | 80% | 45,643 psi | 72% | 3091 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 44,773 psi | 70% | 3130 fps | 96.8% |
| Vihtavuori N565 | <<locked>> | 82% | 39,798 psi | 62% | 2989 fps | 95.5% |
| Vihtavuori N568 | <<locked>> | 88% | 43,265 psi | 68% | 3110 fps | 95.3% |
| Vihtavuori N570 | 112 gr | 94% | 51,126 psi | 80% | 3320 fps | 95.6% |
| Winchester StaBALL HD | <<locked>> | 80% | 39,146 psi | 61% | 3054 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 42,714 psi | 67% | 2999 fps | 97.9% |
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 56 powders for .30-378 Weath. Mag. loaded with the .308 | 154gr | MEN SF. Hodgdon Retumbo delivers the highest muzzle velocity at 3,461 fps; across all powders the maximum-charge window runs from 2,156 fps to 3,461 fps. ADI AR 2218 gives the best case fill at 100 %, and 56 of the 56 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 154.0 gr projectile in 0.308" calls for a 1:13.5 twist; slower twists will usually not stabilise this weight. ADI AR 2218, ADI AR 2225, 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. Vihtavuori N570, Hodgdon Retumbo, ReloadSwiss RS 76 rank at the top here: for .30-378 Weath. Mag. with the .308 | 154gr | MEN SF 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.