Load Specifications
Load data in caliber .30-378 Weath. Mag. with .308 | 150gr | Impala LWH CHP 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>> | 86% | 54,897 psi | 86% | 3238 fps | 100% |
| Accurate High Country | <<locked>> | 84% | 55,869 psi | 88% | 3392 fps | 99.3% |
| Accurate MAGPRO | <<locked>> | 86% | 56,855 psi | 89% | 3396 fps | 98.6% |
| ADI AR 2209 | <<locked>> | 84% | 54,781 psi | 86% | 3310 fps | 99.6% |
| ADI AR 2213 | <<locked>> | 88% | 57,043 psi | 89% | 3389 fps | 99.3% |
| ADI AR 2217 | <<locked>> | 96% | 55,854 psi | 88% | 3356 fps | 99.5% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 56,594 psi | 89% | 3471 fps | 97.3% |
| ADI AR 2225 | <<locked>> | 98% | 55,042 psi | 86% | 3389 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 54,737 psi | 86% | 3307 fps | 99.6% |
| Alliant Reloder-22 | <<locked>> | 86% | 54,259 psi | 85% | 3327 fps | 99.6% |
| Alliant Reloder-23 | <<locked>> | 88% | 55,999 psi | 88% | 3297 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 92% | 56,101 psi | 88% | 3369 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 84% | 56,797 psi | 89% | 3389 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 96% | 54,476 psi | 85% | 3383 fps | 96.7% |
| Alliant Reloder-50ᴾ | <<locked>> | 100% | 54,955 psi | 86% | 3379 fps | 96.3% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 57,377 psi | 90% | 3330 fps | 97.5% |
| Bofors RP15 | <<locked>> | 90% | 57,261 psi | 90% | 3379 fps | 99.8% |
| Bofors RP30 | <<locked>> | 94% | 56,304 psi | 88% | 3383 fps | 99.6% |
| Bofors RP5 | <<locked>> | 86% | 54,259 psi | 85% | 3327 fps | 99.6% |
| Hodgdon H1000 | <<locked>> | 94% | 57,435 psi | 90% | 3383 fps | 99.9% |
| Hodgdon H4831 | <<locked>> | 86% | 56,188 psi | 88% | 3314 fps | 98.8% |
| Hodgdon H4831 SC | <<locked>> | 86% | 55,274 psi | 87% | 3297 fps | 98.7% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 55,579 psi | 87% | 3228 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 92% | 54,998 psi | 86% | 3455 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,913 psi | 59% | 2182 fps | 100% |
| IMR 4350 | <<locked>> | 82% | 57,130 psi | 90% | 3291 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 86% | 56,565 psi | 89% | 3294 fps | 99% |
| IMR 7828 SSC | <<locked>> | 88% | 55,434 psi | 87% | 3369 fps | 99.2% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 54,418 psi | 85% | 3366 fps | 99.4% |
| Lovex S071 | <<locked>> | 92% | 56,797 psi | 89% | 3268 fps | 100% |
| Norma 217ᴾ | <<locked>> | 100% | 55,535 psi | 87% | 3392 fps | 100% |
| Norma MRP | <<locked>> | 84% | 54,244 psi | 85% | 3346 fps | 100% |
| Ramshot Grand | <<locked>> | 88% | 56,782 psi | 89% | 3396 fps | 99.6% |
| Ramshot Magnum | <<locked>> | 90% | 55,535 psi | 87% | 3317 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,870 psi | 61% | 2228 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 56,101 psi | 88% | 3445 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 94% | 55,956 psi | 88% | 3402 fps | 98.7% |
| Rottweil R 904 | <<locked>> | 84% | 55,492 psi | 87% | 3278 fps | 99.1% |
| Rottweil R 905 | <<locked>> | 84% | 54,534 psi | 85% | 3297 fps | 99.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 54,143 psi | 85% | 3291 fps | 99.6% |
| Somchem S361 | <<locked>> | 84% | 57,159 psi | 90% | 3268 fps | 98.9% |
| Somchem S365 | <<locked>> | 82% | 57,696 psi | 90% | 3297 fps | 100% |
| Somchem S385 | <<locked>> | 84% | 55,245 psi | 87% | 3268 fps | 99.9% |
| Vihtavuori N165 | <<locked>> | 88% | 54,984 psi | 86% | 3245 fps | 99.8% |
| Vihtavuori N555 | <<locked>> | 84% | 54,824 psi | 86% | 3278 fps | 100% |
| Vihtavuori N560 | <<locked>> | 86% | 57,348 psi | 90% | 3406 fps | 99.1% |
| Vihtavuori N565 | <<locked>> | 90% | 55,216 psi | 87% | 3340 fps | 99% |
| Vihtavuori N568 | <<locked>> | 94% | 56,231 psi | 88% | 3402 fps | 98.3% |
| Vihtavuori N570 | <<locked>> | 96% | 57,319 psi | 90% | 3468 fps | 96.9% |
| Winchester StaBALL HD | <<locked>> | 88% | 56,101 psi | 88% | 3396 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 86% | 54,781 psi | 86% | 3258 fps | 99.6% |
Start Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 80% | 45,368 psi | 71% | 3061 fps | 99.7% |
| Accurate High Country | <<locked>> | 80% | 48,921 psi | 77% | 3258 fps | 98.2% |
| Accurate MAGPRO | <<locked>> | 80% | 46,296 psi | 73% | 3182 fps | 96.4% |
| ADI AR 2209 | <<locked>> | 80% | 48,167 psi | 75% | 3186 fps | 98.8% |
| ADI AR 2213 | <<locked>> | 80% | 43,584 psi | 68% | 3120 fps | 96.8% |
| ADI AR 2217 | <<locked>> | 84% | 37,739 psi | 59% | 2963 fps | 95.1% |
| ADI AR 2218 | <<locked>> | 96% | 49,226 psi | 77% | 3307 fps | 95% |
| ADI AR 2225 | <<locked>> | 80% | 30,864 psi | 48% | 2802 fps | 95.2% |
| Alliant Reloder-19 | <<locked>> | 80% | 48,196 psi | 76% | 3179 fps | 98.8% |
| Alliant Reloder-22 | <<locked>> | 80% | 44,614 psi | 70% | 3133 fps | 98.2% |
| Alliant Reloder-23 | <<locked>> | 80% | 43,381 psi | 68% | 3074 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 37,797 psi | 59% | 3002 fps | 99.3% |
| Alliant Reloder-26 | <<locked>> | 80% | 49,226 psi | 77% | 3261 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 94% | 50,749 psi | 80% | 3310 fps | 95.7% |
| Alliant Reloder-50 | <<locked>> | 98% | 51,155 psi | 80% | 3304 fps | 95.2% |
| Baschieri & Pellagri 109 | <<locked>> | 84% | 47,630 psi | 75% | 3136 fps | 95% |
| Bofors RP15 | <<locked>> | 80% | 41,640 psi | 65% | 3061 fps | 97.3% |
| Bofors RP30 | <<locked>> | 82% | 38,087 psi | 60% | 2992 fps | 95.5% |
| Bofors RP5 | <<locked>> | 80% | 44,614 psi | 70% | 3133 fps | 98.2% |
| Hodgdon H1000 | <<locked>> | 80% | 35,911 psi | 56% | 2913 fps | 95% |
| Hodgdon H4831 | <<locked>> | 80% | 46,180 psi | 72% | 3117 fps | 96.8% |
| Hodgdon H4831 SC | <<locked>> | 80% | 45,426 psi | 71% | 3100 fps | 96.6% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 52,170 psi | 82% | 3176 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 80% | 36,970 psi | 58% | 3038 fps | 96.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,500 psi | 45% | 1955 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 53,650 psi | 84% | 3228 fps | 99.9% |
| IMR 4955 Enduron | <<locked>> | 80% | 47,036 psi | 74% | 3107 fps | 97.3% |
| IMR 7828 SSC | <<locked>> | 80% | 42,409 psi | 66% | 3100 fps | 96.5% |
| IMR 8133 Enduron | <<locked>> | 90% | 39,363 psi | 62% | 3041 fps | 95.9% |
| Lovex S071 | <<locked>> | 80% | 39,508 psi | 62% | 2933 fps | 98.9% |
| Norma 217 | <<locked>> | 84% | 32,735 psi | 51% | 2881 fps | 95.5% |
| Norma MRP | <<locked>> | 80% | 47,398 psi | 74% | 3215 fps | 99.5% |
| Ramshot Grand | <<locked>> | 80% | 42,627 psi | 67% | 3114 fps | 97% |
| Ramshot Magnum | <<locked>> | 80% | 38,899 psi | 61% | 2982 fps | 97.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,298 psi | 46% | 2005 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 36,535 psi | 57% | 3012 fps | 97.8% |
| ReloadSwiss RS 80 | <<locked>> | 86% | 41,829 psi | 66% | 3107 fps | 95.2% |
| Rottweil R 904 | <<locked>> | 80% | 48,936 psi | 77% | 3156 fps | 98.1% |
| Rottweil R 905 | <<locked>> | 80% | 48,008 psi | 75% | 3173 fps | 98.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 47,659 psi | 75% | 3166 fps | 98.8% |
| Somchem S361 | <<locked>> | 80% | 50,198 psi | 79% | 3140 fps | 97.8% |
| Somchem S365 | <<locked>> | 80% | 54,012 psi | 85% | 3241 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 48,718 psi | 76% | 3146 fps | 99.4% |
| Vihtavuori N165 | <<locked>> | 80% | 42,641 psi | 67% | 3005 fps | 98.2% |
| Vihtavuori N555 | <<locked>> | 80% | 48,341 psi | 76% | 3166 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 46,891 psi | 73% | 3199 fps | 97.2% |
| Vihtavuori N565 | <<locked>> | 80% | 39,885 psi | 63% | 3009 fps | 95.3% |
| Vihtavuori N568 | <<locked>> | 88% | 45,788 psi | 72% | 3192 fps | 95.9% |
| Vihtavuori N570 | <<locked>> | 92% | 49,951 psi | 78% | 3320 fps | 95% |
| Winchester StaBALL HD | <<locked>> | 80% | 41,829 psi | 66% | 3143 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 44,846 psi | 70% | 3064 fps | 98.2% |
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 | 150gr | Impala LWH CHP. ADI AR 2218 delivers the highest muzzle velocity at 3,471 fps; across all powders the maximum-charge window runs from 2,182 fps to 3,471 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 150.0 gr projectile in 0.308" calls for a 1:12.5 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.