Load Specifications
Load data in caliber .30-378 Weath. Mag. with .308 | 168gr | Berger VLD Hunting bullet and 50 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% | 54,752 psi | 86% | 3100 fps | 100% |
| Accurate High Country | <<locked>> | 84% | 56,608 psi | 89% | 3268 fps | 99.8% |
| Accurate MAGPRO | <<locked>> | 86% | 57,566 psi | 90% | 3274 fps | 99.4% |
| ADI AR 2209 | <<locked>> | 84% | 55,709 psi | 87% | 3196 fps | 100% |
| ADI AR 2213 | <<locked>> | 86% | 54,389 psi | 85% | 3209 fps | 99.6% |
| ADI AR 2217 | <<locked>> | 96% | 57,145 psi | 90% | 3245 fps | 99.9% |
| ADI AR 2218 | <<locked>> | 98% | 53,766 psi | 84% | 3297 fps | 97.8% |
| ADI AR 2225 | <<locked>> | 98% | 56,304 psi | 88% | 3268 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 55,492 psi | 87% | 3182 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 86% | 54,926 psi | 86% | 3205 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 88% | 56,739 psi | 89% | 3166 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 92% | 57,203 psi | 90% | 3241 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 84% | 57,667 psi | 90% | 3258 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 96% | 55,579 psi | 87% | 3278 fps | 98% |
| Alliant Reloder-50ᴾ | <<locked>> | 100% | 55,521 psi | 87% | 3261 fps | 97.5% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 54,955 psi | 86% | 3163 fps | 98% |
| Bofors RP15 | <<locked>> | 88% | 54,317 psi | 85% | 3192 fps | 99.9% |
| Bofors RP30 | <<locked>> | 94% | 57,188 psi | 90% | 3261 fps | 99.9% |
| Bofors RP5 | <<locked>> | 86% | 54,926 psi | 86% | 3205 fps | 100% |
| Hodgdon H1000 | <<locked>> | 92% | 54,650 psi | 86% | 3205 fps | 100% |
| Hodgdon H4831 | <<locked>> | 86% | 57,116 psi | 90% | 3199 fps | 99.5% |
| Hodgdon H4831 SC | <<locked>> | 86% | 56,086 psi | 88% | 3182 fps | 99.4% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 56,072 psi | 88% | 3097 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 92% | 56,565 psi | 89% | 3337 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,768 psi | 59% | 2070 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 86% | 57,363 psi | 90% | 3173 fps | 99.6% |
| IMR 7828 SSC | <<locked>> | 88% | 56,652 psi | 89% | 3255 fps | 99.8% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 55,259 psi | 87% | 3245 fps | 99.8% |
| Lovex S071 | <<locked>> | 92% | 56,536 psi | 89% | 3130 fps | 100% |
| Norma 217ᴾ | <<locked>> | 100% | 56,492 psi | 89% | 3268 fps | 100% |
| Norma MRP | <<locked>> | 84% | 54,998 psi | 86% | 3219 fps | 100% |
| Ramshot Grand | <<locked>> | 86% | 53,954 psi | 85% | 3212 fps | 99.7% |
| Ramshot Magnum | <<locked>> | 90% | 56,652 psi | 89% | 3199 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,696 psi | 61% | 2119 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 57,595 psi | 90% | 3320 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 94% | 56,971 psi | 89% | 3284 fps | 99.5% |
| Rottweil R 904 | <<locked>> | 84% | 56,217 psi | 88% | 3163 fps | 99.7% |
| Rottweil R 905 | <<locked>> | 84% | 55,143 psi | 86% | 3173 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 54,766 psi | 86% | 3169 fps | 100% |
| Somchem S361 | <<locked>> | 82% | 53,925 psi | 85% | 3084 fps | 99.2% |
| Somchem S385 | <<locked>> | 84% | 55,564 psi | 87% | 3140 fps | 100% |
| Vihtavuori N165 | <<locked>> | 88% | 55,579 psi | 87% | 3127 fps | 100% |
| Vihtavuori N170 | <<locked>> | 92% | 54,795 psi | 86% | 3143 fps | 96.3% |
| Vihtavuori N555 | <<locked>> | 84% | 54,911 psi | 86% | 3140 fps | 100% |
| Vihtavuori N560 | <<locked>> | 84% | 54,404 psi | 85% | 3222 fps | 99.4% |
| Vihtavuori N565 | <<locked>> | 90% | 55,535 psi | 87% | 3215 fps | 99.6% |
| Vihtavuori N568 | <<locked>> | 94% | 57,348 psi | 90% | 3287 fps | 99.2% |
| Vihtavuori N570 | <<locked>> | 94% | 54,621 psi | 86% | 3284 fps | 97.4% |
| Winchester StaBALL HD | <<locked>> | 88% | 57,217 psi | 90% | 3261 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 86% | 55,288 psi | 87% | 3133 fps | 100% |
Start Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 80% | 44,643 psi | 70% | 2923 fps | 100% |
| Accurate High Country | <<locked>> | 80% | 49,226 psi | 77% | 3133 fps | 99% |
| Accurate MAGPRO | <<locked>> | 80% | 46,485 psi | 73% | 3064 fps | 97.5% |
| ADI AR 2209 | <<locked>> | 80% | 48,660 psi | 76% | 3068 fps | 99.5% |
| ADI AR 2213 | <<locked>> | 80% | 43,947 psi | 69% | 3002 fps | 97.9% |
| ADI AR 2217 | <<locked>> | 82% | 35,114 psi | 55% | 2782 fps | 95.4% |
| ADI AR 2218 | <<locked>> | 94% | 46,325 psi | 73% | 3133 fps | 95.6% |
| ADI AR 2225 | <<locked>> | 80% | 30,124 psi | 47% | 2677 fps | 96.3% |
| Alliant Reloder-19 | <<locked>> | 80% | 48,544 psi | 76% | 3058 fps | 99.5% |
| Alliant Reloder-22 | <<locked>> | 80% | 44,730 psi | 70% | 3009 fps | 99% |
| Alliant Reloder-23 | <<locked>> | 80% | 43,511 psi | 68% | 2943 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 37,666 psi | 59% | 2874 fps | 99.8% |
| Alliant Reloder-26 | <<locked>> | 80% | 49,588 psi | 78% | 3127 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 92% | 47,776 psi | 75% | 3127 fps | 96.1% |
| Alliant Reloder-50 | <<locked>> | 96% | 47,688 psi | 75% | 3110 fps | 95.5% |
| Baschieri & Pellagri 109 | <<locked>> | 82% | 45,092 psi | 71% | 2969 fps | 95.6% |
| Bofors RP15 | <<locked>> | 80% | 41,713 psi | 65% | 2940 fps | 98.3% |
| Bofors RP30 | <<locked>> | 80% | 35,186 psi | 55% | 2799 fps | 95.5% |
| Bofors RP5 | <<locked>> | 80% | 44,730 psi | 70% | 3009 fps | 99% |
| Hodgdon H1000 | <<locked>> | 80% | 35,636 psi | 56% | 2799 fps | 96.3% |
| Hodgdon H4831 | <<locked>> | 80% | 46,514 psi | 73% | 3002 fps | 97.9% |
| Hodgdon H4831 SC | <<locked>> | 80% | 45,687 psi | 72% | 2986 fps | 97.8% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 52,518 psi | 82% | 3041 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 80% | 36,811 psi | 58% | 2920 fps | 97.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,369 psi | 44% | 1857 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 47,297 psi | 74% | 2989 fps | 98.3% |
| IMR 7828 SSC | <<locked>> | 80% | 42,699 psi | 67% | 2982 fps | 97.7% |
| IMR 8133 Enduron | <<locked>> | 88% | 36,564 psi | 57% | 2851 fps | 95.9% |
| Lovex S071 | <<locked>> | 80% | 38,479 psi | 60% | 2792 fps | 99.4% |
| Norma 217 | <<locked>> | 82% | 29,907 psi | 47% | 2680 fps | 95.2% |
| Norma MRP | <<locked>> | 80% | 47,718 psi | 75% | 3087 fps | 99.9% |
| Ramshot Grand | <<locked>> | 80% | 43,004 psi | 67% | 2999 fps | 98.1% |
| Ramshot Magnum | <<locked>> | 80% | 38,711 psi | 61% | 2858 fps | 98.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,138 psi | 46% | 1903 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 36,245 psi | 57% | 2890 fps | 98.8% |
| ReloadSwiss RS 80 | <<locked>> | 84% | 38,798 psi | 61% | 2913 fps | 95.3% |
| Rottweil R 904 | <<locked>> | 80% | 49,429 psi | 77% | 3041 fps | 99% |
| Rottweil R 905 | <<locked>> | 80% | 48,196 psi | 76% | 3048 fps | 99.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 47,848 psi | 75% | 3041 fps | 99.5% |
| Somchem S361 | <<locked>> | 80% | 50,459 psi | 79% | 3025 fps | 98.7% |
| Somchem S385 | <<locked>> | 80% | 48,631 psi | 76% | 3018 fps | 99.8% |
| Vihtavuori N165 | <<locked>> | 80% | 42,540 psi | 67% | 2887 fps | 99% |
| Vihtavuori N170 | <<locked>> | 90% | 51,300 psi | 80% | 3077 fps | 95.4% |
| Vihtavuori N555 | <<locked>> | 80% | 48,225 psi | 76% | 3028 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 47,297 psi | 74% | 3084 fps | 98.2% |
| Vihtavuori N565 | <<locked>> | 80% | 39,378 psi | 62% | 2884 fps | 96.3% |
| Vihtavuori N568 | <<locked>> | 84% | 39,914 psi | 63% | 2933 fps | 95.1% |
| Vihtavuori N570 | <<locked>> | 90% | 47,253 psi | 74% | 3136 fps | 95.4% |
| Winchester StaBALL HD | <<locked>> | 80% | 42,221 psi | 66% | 3005 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 44,947 psi | 70% | 2946 fps | 99% |
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 | 168gr | Berger VLD Hunting. Hodgdon Retumbo delivers the highest muzzle velocity at 3,337 fps; across all powders the maximum-charge window runs from 2,070 fps to 3,337 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 168.0 gr projectile in 0.308" calls for a 1:12.5 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. As outliers, Accurate 8700, Hodgdon US 869, IMR 7977 Enduron 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.