Load Specifications
Load data in caliber .30-378 Weath. Mag. with .308 | 150gr | Norma Semi Soft Point bullet and 54 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% | 56,362 psi | 88% | 3271 fps | 100% |
| Accurate High Country | <<locked>> | 84% | 54,317 psi | 85% | 3373 fps | 99.2% |
| Accurate MAGPRO | <<locked>> | 86% | 55,477 psi | 87% | 3379 fps | 98.5% |
| ADI AR 2209 | <<locked>> | 86% | 57,464 psi | 90% | 3373 fps | 99.9% |
| ADI AR 2213 | <<locked>> | 88% | 56,159 psi | 88% | 3383 fps | 99.3% |
| ADI AR 2217 | <<locked>> | 96% | 54,853 psi | 86% | 3350 fps | 99.5% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 55,680 psi | 87% | 3461 fps | 97.3% |
| ADI AR 2225 | <<locked>> | 98% | 53,809 psi | 84% | 3373 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 82% | 57,609 psi | 90% | 3363 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 57,145 psi | 90% | 3360 fps | 99.8% |
| Alliant Reloder-22 | <<locked>> | 88% | 56,623 psi | 89% | 3379 fps | 99.9% |
| Alliant Reloder-23 | <<locked>> | 88% | 54,607 psi | 86% | 3284 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 92% | 54,969 psi | 86% | 3356 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 84% | 55,143 psi | 86% | 3369 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 98% | 57,537 psi | 90% | 3442 fps | 97.5% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 56,724 psi | 89% | 3330 fps | 97.5% |
| Bofors RP15 | <<locked>> | 90% | 55,825 psi | 87% | 3363 fps | 99.8% |
| Bofors RP30 | <<locked>> | 94% | 54,839 psi | 86% | 3363 fps | 99.5% |
| Bofors RP5 | <<locked>> | 88% | 56,623 psi | 89% | 3379 fps | 99.9% |
| Hodgdon H1000 | <<locked>> | 94% | 56,463 psi | 88% | 3376 fps | 99.8% |
| Hodgdon H4831 | <<locked>> | 86% | 55,056 psi | 86% | 3304 fps | 98.8% |
| Hodgdon H4831 SC | <<locked>> | 86% | 54,157 psi | 85% | 3287 fps | 98.6% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 57,682 psi | 90% | 3274 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 92% | 53,896 psi | 84% | 3442 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,594 psi | 59% | 2192 fps | 100% |
| IMR 4350 | <<locked>> | 82% | 56,086 psi | 88% | 3287 fps | 100% |
| IMR 4831 | <<locked>> | 82% | 56,826 psi | 89% | 3291 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 86% | 55,521 psi | 87% | 3287 fps | 99% |
| IMR 7828 SSC | <<locked>> | 88% | 54,462 psi | 85% | 3360 fps | 99.2% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 52,939 psi | 83% | 3340 fps | 99.2% |
| Lovex S071 | <<locked>> | 92% | 54,636 psi | 86% | 3245 fps | 100% |
| Norma 204 | <<locked>> | 82% | 57,363 psi | 90% | 3346 fps | 99.8% |
| Norma 217ᴾ | <<locked>> | 100% | 54,085 psi | 85% | 3369 fps | 100% |
| Norma MRP | <<locked>> | 86% | 56,724 psi | 89% | 3396 fps | 100% |
| Ramshot Grand | <<locked>> | 88% | 55,535 psi | 87% | 3379 fps | 99.5% |
| Ramshot Hunter | <<locked>> | 82% | 57,363 psi | 90% | 3343 fps | 100% |
| Ramshot Magnum | <<locked>> | 90% | 54,346 psi | 85% | 3304 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,566 psi | 60% | 2241 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 54,984 psi | 86% | 3425 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 94% | 54,520 psi | 85% | 3379 fps | 98.6% |
| Rottweil R 904 | <<locked>> | 84% | 54,331 psi | 85% | 3271 fps | 99.1% |
| Rottweil R 905 | <<locked>> | 86% | 56,855 psi | 89% | 3350 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 56,449 psi | 88% | 3343 fps | 99.8% |
| Somchem S361 | <<locked>> | 84% | 55,985 psi | 88% | 3258 fps | 98.9% |
| Somchem S365 | <<locked>> | 82% | 56,159 psi | 88% | 3284 fps | 100% |
| Somchem S385 | <<locked>> | 86% | 57,305 psi | 90% | 3314 fps | 100% |
| Vihtavuori N165 | <<locked>> | 90% | 57,305 psi | 90% | 3297 fps | 100% |
| Vihtavuori N555 | <<locked>> | 86% | 56,405 psi | 88% | 3314 fps | 100% |
| Vihtavuori N560 | <<locked>> | 86% | 56,115 psi | 88% | 3392 fps | 99% |
| Vihtavuori N565 | <<locked>> | 92% | 57,203 psi | 90% | 3383 fps | 99.3% |
| Vihtavuori N568 | <<locked>> | 94% | 54,940 psi | 86% | 3383 fps | 98.2% |
| Vihtavuori N570 | <<locked>> | 96% | 56,275 psi | 88% | 3448 fps | 96.8% |
| Winchester StaBALL HD | <<locked>> | 88% | 54,491 psi | 85% | 3369 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 88% | 57,261 psi | 90% | 3310 fps | 99.9% |
Start Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 80% | 42,873 psi | 67% | 3022 fps | 99.5% |
| Accurate High Country | <<locked>> | 80% | 47,108 psi | 74% | 3225 fps | 97.9% |
| Accurate MAGPRO | <<locked>> | 80% | 44,672 psi | 70% | 3156 fps | 96% |
| ADI AR 2209 | <<locked>> | 80% | 46,876 psi | 73% | 3169 fps | 98.6% |
| ADI AR 2213 | <<locked>> | 80% | 42,250 psi | 66% | 3097 fps | 96.5% |
| ADI AR 2217 | <<locked>> | 86% | 38,682 psi | 61% | 2999 fps | 95.7% |
| ADI AR 2218 | <<locked>> | 98% | 51,619 psi | 81% | 3373 fps | 96.1% |
| ADI AR 2225 | <<locked>> | 82% | 30,879 psi | 48% | 2812 fps | 95.3% |
| Alliant Reloder-16 | <<locked>> | 80% | 53,882 psi | 84% | 3304 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 46,804 psi | 73% | 3163 fps | 98.7% |
| Alliant Reloder-22 | <<locked>> | 80% | 42,989 psi | 67% | 3104 fps | 97.9% |
| Alliant Reloder-23 | <<locked>> | 80% | 41,669 psi | 65% | 3045 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 35,998 psi | 56% | 2959 fps | 98.9% |
| Alliant Reloder-26 | <<locked>> | 80% | 47,427 psi | 74% | 3228 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 94% | 49,313 psi | 77% | 3284 fps | 95.5% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 49,821 psi | 78% | 3196 fps | 95.9% |
| Bofors RP15 | <<locked>> | 80% | 39,929 psi | 63% | 3028 fps | 96.9% |
| Bofors RP30 | <<locked>> | 84% | 38,682 psi | 61% | 3015 fps | 95.8% |
| Bofors RP5 | <<locked>> | 80% | 42,989 psi | 67% | 3104 fps | 97.9% |
| Hodgdon H1000 | <<locked>> | 82% | 36,651 psi | 57% | 2949 fps | 95.5% |
| Hodgdon H4831 | <<locked>> | 80% | 44,846 psi | 70% | 3100 fps | 96.6% |
| Hodgdon H4831 SC | <<locked>> | 80% | 44,077 psi | 69% | 3081 fps | 96.4% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 50,662 psi | 79% | 3163 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 80% | 35,099 psi | 55% | 2989 fps | 96% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,210 psi | 44% | 1965 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 52,504 psi | 82% | 3222 fps | 99.8% |
| IMR 4831 | <<locked>> | 80% | 53,127 psi | 83% | 3228 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 45,788 psi | 72% | 3094 fps | 97.1% |
| IMR 7828 SSC | <<locked>> | 80% | 40,857 psi | 64% | 3071 fps | 96% |
| IMR 8133 Enduron | <<locked>> | 90% | 37,333 psi | 59% | 2992 fps | 95% |
| Lovex S071 | <<locked>> | 80% | 36,883 psi | 58% | 2881 fps | 98.4% |
| Norma 204 | <<locked>> | 80% | 53,592 psi | 84% | 3281 fps | 99.5% |
| Norma 217 | <<locked>> | 86% | 32,721 psi | 51% | 2881 fps | 95.4% |
| Norma MRP | <<locked>> | 80% | 45,672 psi | 72% | 3186 fps | 99.4% |
| Ramshot Grand | <<locked>> | 80% | 41,002 psi | 64% | 3084 fps | 96.5% |
| Ramshot Hunter | <<locked>> | 80% | 53,679 psi | 84% | 3281 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 37,028 psi | 58% | 2943 fps | 97.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,921 psi | 45% | 2014 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 34,592 psi | 54% | 2959 fps | 97.1% |
| ReloadSwiss RS 80 | <<locked>> | 88% | 43,134 psi | 68% | 3140 fps | 95.7% |
| Rottweil R 904 | <<locked>> | 80% | 47,703 psi | 75% | 3143 fps | 98% |
| Rottweil R 905 | <<locked>> | 80% | 46,427 psi | 73% | 3150 fps | 98.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 46,079 psi | 72% | 3143 fps | 98.6% |
| Somchem S361 | <<locked>> | 80% | 48,892 psi | 77% | 3127 fps | 97.7% |
| Somchem S365 | <<locked>> | 80% | 52,373 psi | 82% | 3222 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 46,978 psi | 74% | 3127 fps | 99.3% |
| Vihtavuori N165 | <<locked>> | 80% | 40,915 psi | 64% | 2979 fps | 97.9% |
| Vihtavuori N555 | <<locked>> | 80% | 46,238 psi | 72% | 3133 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 45,295 psi | 71% | 3176 fps | 96.8% |
| Vihtavuori N565 | <<locked>> | 82% | 40,422 psi | 63% | 3031 fps | 95.6% |
| Vihtavuori N568 | <<locked>> | 88% | 44,106 psi | 69% | 3156 fps | 95.4% |
| Vihtavuori N570 | <<locked>> | 94% | 52,185 psi | 82% | 3373 fps | 95.8% |
| Winchester StaBALL HD | <<locked>> | 80% | 39,842 psi | 62% | 3097 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 43,294 psi | 68% | 3041 fps | 98% |
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 62 powders for .30-378 Weath. Mag. loaded with the .308 | 150gr | Norma Semi Soft Point. ADI AR 2218 delivers the highest muzzle velocity at 3,461 fps; across all powders the maximum-charge window runs from 2,192 fps to 3,461 fps. Accurate 8700 gives the best case fill at 100 %, and 62 of the 62 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 1:16.5 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.