Load Specifications
Load data in caliber .30-378 Weath. Mag. with .308 | 175gr | Lapua ScenarL bullet and 49 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Hodgdon Retumbo, ReloadSwiss RS 76 and ADI AR 2218.
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% | 55,825 psi | 87% | 3064 fps | 100% |
| Accurate MAGPRO | <<locked>> | 84% | 54,882 psi | 86% | 3176 fps | 99.3% |
| ADI AR 2209 | <<locked>> | 84% | 56,913 psi | 89% | 3159 fps | 100% |
| ADI AR 2213 | <<locked>> | 86% | 55,550 psi | 87% | 3176 fps | 99.8% |
| ADI AR 2217 | <<locked>> | 94% | 54,665 psi | 86% | 3156 fps | 99.9% |
| ADI AR 2218 | <<locked>> | 98% | 55,129 psi | 86% | 3278 fps | 98.5% |
| ADI AR 2225 | <<locked>> | 96% | 53,780 psi | 84% | 3176 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 56,492 psi | 89% | 3146 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 86% | 56,057 psi | 88% | 3169 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 86% | 54,273 psi | 85% | 3074 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 90% | 54,824 psi | 86% | 3150 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 82% | 54,911 psi | 86% | 3159 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 96% | 57,116 psi | 90% | 3255 fps | 98.5% |
| Alliant Reloder-50ᴾ | <<locked>> | 100% | 57,000 psi | 89% | 3241 fps | 98.1% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 56,043 psi | 88% | 3133 fps | 98.5% |
| Bofors RP15 | <<locked>> | 88% | 55,492 psi | 87% | 3159 fps | 100% |
| Bofors RP30 | <<locked>> | 92% | 54,694 psi | 86% | 3169 fps | 99.9% |
| Bofors RP5 | <<locked>> | 86% | 56,057 psi | 88% | 3169 fps | 100% |
| Hodgdon H1000 | <<locked>> | 92% | 56,072 psi | 88% | 3176 fps | 100% |
| Hodgdon H4831 | <<locked>> | 84% | 54,360 psi | 85% | 3100 fps | 99.4% |
| Hodgdon H4831 SC | <<locked>> | 86% | 57,203 psi | 90% | 3150 fps | 99.7% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 57,203 psi | 90% | 3058 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 90% | 54,056 psi | 85% | 3241 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,840 psi | 59% | 2031 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 84% | 54,795 psi | 86% | 3081 fps | 99.5% |
| IMR 7828 SSC | <<locked>> | 86% | 54,099 psi | 85% | 3156 fps | 99.7% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 56,666 psi | 89% | 3215 fps | 100% |
| Lovex S071 | <<locked>> | 90% | 54,186 psi | 85% | 3041 fps | 100% |
| Norma 217 | <<locked>> | 98% | 54,157 psi | 85% | 3179 fps | 100% |
| Norma MRP | <<locked>> | 84% | 56,217 psi | 88% | 3186 fps | 100% |
| Ramshot Grand | <<locked>> | 86% | 55,303 psi | 87% | 3179 fps | 99.9% |
| Ramshot Magnum | <<locked>> | 88% | 53,867 psi | 84% | 3104 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,798 psi | 61% | 2077 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 54,795 psi | 86% | 3225 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 92% | 54,114 psi | 85% | 3186 fps | 99.4% |
| Rottweil R 904 | <<locked>> | 84% | 57,319 psi | 90% | 3127 fps | 99.9% |
| Rottweil R 905 | <<locked>> | 84% | 56,333 psi | 88% | 3140 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 55,941 psi | 88% | 3136 fps | 100% |
| Somchem S361 | <<locked>> | 82% | 55,056 psi | 86% | 3054 fps | 99.5% |
| Somchem S385 | <<locked>> | 84% | 56,579 psi | 89% | 3104 fps | 100% |
| Vihtavuori N165 | <<locked>> | 88% | 56,681 psi | 89% | 3091 fps | 100% |
| Vihtavuori N170 | <<locked>> | 92% | 56,057 psi | 88% | 3117 fps | 96.9% |
| Vihtavuori N555 | <<locked>> | 84% | 56,130 psi | 88% | 3104 fps | 100% |
| Vihtavuori N560 | <<locked>> | 84% | 55,564 psi | 87% | 3189 fps | 99.6% |
| Vihtavuori N565 | <<locked>> | 90% | 56,855 psi | 89% | 3182 fps | 99.8% |
| Vihtavuori N568 | <<locked>> | 92% | 54,607 psi | 86% | 3192 fps | 99.1% |
| Vihtavuori N570 | <<locked>> | 94% | 55,999 psi | 88% | 3261 fps | 98% |
| Winchester StaBALL HD | <<locked>> | 86% | 54,650 psi | 86% | 3166 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 86% | 56,376 psi | 88% | 3100 fps | 100% |
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% | 45,672 psi | 72% | 2894 fps | 100% |
| Accurate MAGPRO | <<locked>> | 80% | 47,674 psi | 75% | 3038 fps | 98.1% |
| ADI AR 2209 | <<locked>> | 80% | 49,690 psi | 78% | 3035 fps | 99.7% |
| ADI AR 2213 | <<locked>> | 80% | 45,020 psi | 71% | 2979 fps | 98.5% |
| ADI AR 2217 | <<locked>> | 80% | 33,489 psi | 52% | 2694 fps | 95.1% |
| ADI AR 2218 | 109.9 gr | 92% | 44,121 psi | 69% | 3038 fps | 95.3% |
| ADI AR 2225 | <<locked>> | 80% | 30,879 psi | 48% | 2661 fps | 97.2% |
| Alliant Reloder-19 | <<locked>> | 80% | 49,559 psi | 78% | 3025 fps | 99.7% |
| Alliant Reloder-22 | <<locked>> | 80% | 45,788 psi | 72% | 2982 fps | 99.4% |
| Alliant Reloder-23 | <<locked>> | 80% | 44,541 psi | 70% | 2910 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 38,667 psi | 61% | 2851 fps | 99.9% |
| Alliant Reloder-26 | <<locked>> | 80% | 50,807 psi | 80% | 3094 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 90% | 45,527 psi | 71% | 3031 fps | 95.8% |
| Alliant Reloder-50 | <<locked>> | 94% | 45,426 psi | 71% | 3018 fps | 95.2% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 43,091 psi | 68% | 2881 fps | 95.4% |
| Bofors RP15 | <<locked>> | 80% | 42,540 psi | 67% | 2910 fps | 98.8% |
| Bofors RP30 | <<locked>> | 80% | 36,158 psi | 57% | 2779 fps | 96.4% |
| Bofors RP5 | <<locked>> | 80% | 45,788 psi | 72% | 2982 fps | 99.4% |
| Hodgdon H1000 | <<locked>> | 80% | 36,506 psi | 57% | 2779 fps | 97.1% |
| Hodgdon H4831 | <<locked>> | 80% | 47,514 psi | 74% | 2976 fps | 98.5% |
| Hodgdon H4831 SC | <<locked>> | 80% | 46,644 psi | 73% | 2956 fps | 98.3% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 53,548 psi | 84% | 3005 fps | 100% |
| Hodgdon Retumbo | 90.2 gr | 80% | 37,797 psi | 59% | 2900 fps | 98.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,369 psi | 44% | 1818 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 48,182 psi | 76% | 2959 fps | 98.7% |
| IMR 7828 SSC | <<locked>> | 80% | 43,772 psi | 69% | 2956 fps | 98.3% |
| IMR 8133 Enduron | <<locked>> | 86% | 35,012 psi | 55% | 2766 fps | 95.8% |
| Lovex S071 | <<locked>> | 80% | 39,320 psi | 62% | 2762 fps | 99.6% |
| Norma 217 | <<locked>> | 80% | 28,703 psi | 45% | 2598 fps | 95% |
| Norma MRP | <<locked>> | 80% | 48,762 psi | 76% | 3054 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 44,092 psi | 69% | 2972 fps | 98.7% |
| Ramshot Magnum | <<locked>> | 80% | 39,827 psi | 62% | 2838 fps | 99% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,167 psi | 46% | 1864 fps | 100% |
| ReloadSwiss RS 76 | 96.5 gr | 80% | 37,188 psi | 58% | 2871 fps | 99.3% |
| ReloadSwiss RS 80 | <<locked>> | 82% | 36,999 psi | 58% | 2825 fps | 95% |
| Rottweil R 904 | <<locked>> | 80% | 50,241 psi | 79% | 3005 fps | 99.3% |
| Rottweil R 905 | <<locked>> | 80% | 49,240 psi | 77% | 3018 fps | 99.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 48,892 psi | 77% | 3012 fps | 99.7% |
| Somchem S361 | <<locked>> | 80% | 51,474 psi | 81% | 2992 fps | 99.1% |
| Somchem S385 | <<locked>> | 80% | 49,661 psi | 78% | 2989 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 43,468 psi | 68% | 2858 fps | 99.4% |
| Vihtavuori N170 | <<locked>> | 88% | 48,907 psi | 77% | 2986 fps | 95.2% |
| Vihtavuori N555 | <<locked>> | 80% | 49,298 psi | 77% | 2992 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 48,298 psi | 76% | 3054 fps | 98.7% |
| Vihtavuori N565 | <<locked>> | 80% | 40,379 psi | 63% | 2861 fps | 97.1% |
| Vihtavuori N568 | <<locked>> | 84% | 40,973 psi | 64% | 2913 fps | 95.9% |
| Vihtavuori N570 | <<locked>> | 88% | 45,092 psi | 71% | 3045 fps | 95.2% |
| Winchester StaBALL HD | <<locked>> | 80% | 43,424 psi | 68% | 2976 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 45,919 psi | 72% | 2917 fps | 99.4% |
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 58 powders for .30-378 Weath. Mag. loaded with the .308 | 175gr | Lapua ScenarL. ADI AR 2218 delivers the highest muzzle velocity at 3,278 fps; across all powders the maximum-charge window runs from 2,031 fps to 3,278 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 175.0 gr projectile in 0.308" calls for a 1:12.0 twist; slower twists will usually not stabilise this weight. Accurate 8700, 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, ReloadSwiss RS 76, ADI AR 2218 rank at the top here: for .30-378 Weath. Mag. with the .308 | 175gr | Lapua ScenarL they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Hodgdon US 869, Lovex D100, Ramshot LRT 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.