Load Specifications
Load data in caliber .30-378 Weath. Mag. with .308 | 165gr | RWS Doppelkern bullet and 50 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% | 55,883 psi | 88% | 3143 fps | 100% |
| Accurate High Country | <<locked>> | 82% | 53,954 psi | 85% | 3245 fps | 99.6% |
| Accurate MAGPRO | <<locked>> | 84% | 54,853 psi | 86% | 3248 fps | 99% |
| ADI AR 2209 | <<locked>> | 84% | 56,768 psi | 89% | 3235 fps | 100% |
| ADI AR 2213 | <<locked>> | 86% | 55,550 psi | 87% | 3251 fps | 99.7% |
| ADI AR 2217 | <<locked>> | 94% | 54,578 psi | 86% | 3225 fps | 99.8% |
| ADI AR 2218 | <<locked>> | 98% | 55,230 psi | 87% | 3343 fps | 98.1% |
| ADI AR 2225 | <<locked>> | 96% | 53,824 psi | 84% | 3248 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 56,507 psi | 89% | 3222 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 86% | 56,072 psi | 88% | 3245 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 86% | 54,273 psi | 85% | 3150 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 90% | 54,810 psi | 86% | 3225 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 82% | 54,810 psi | 86% | 3235 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 96% | 57,203 psi | 90% | 3323 fps | 98.2% |
| Alliant Reloder-50ᴾ | <<locked>> | 100% | 57,217 psi | 90% | 3310 fps | 97.8% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 55,985 psi | 88% | 3205 fps | 98.2% |
| Bofors RP15 | <<locked>> | 88% | 55,448 psi | 87% | 3232 fps | 100% |
| Bofors RP30 | <<locked>> | 92% | 54,708 psi | 86% | 3238 fps | 99.8% |
| Bofors RP5 | <<locked>> | 86% | 56,072 psi | 88% | 3245 fps | 100% |
| Hodgdon H1000 | <<locked>> | 92% | 55,999 psi | 88% | 3248 fps | 100% |
| Hodgdon H4831 | <<locked>> | 84% | 54,433 psi | 85% | 3176 fps | 99.2% |
| Hodgdon H4831 SC | <<locked>> | 86% | 57,174 psi | 90% | 3222 fps | 99.5% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 57,029 psi | 89% | 3136 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 90% | 53,969 psi | 85% | 3314 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,855 psi | 59% | 2100 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 84% | 54,679 psi | 86% | 3153 fps | 99.3% |
| IMR 7828 SSC | <<locked>> | 86% | 53,969 psi | 85% | 3232 fps | 99.6% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 56,811 psi | 89% | 3291 fps | 99.9% |
| Lovex S071 | <<locked>> | 92% | 57,667 psi | 90% | 3169 fps | 100% |
| Norma 217 | <<locked>> | 98% | 54,230 psi | 85% | 3248 fps | 100% |
| Norma MRP | <<locked>> | 84% | 56,159 psi | 88% | 3261 fps | 100% |
| Ramshot Grand | <<locked>> | 86% | 55,288 psi | 87% | 3255 fps | 99.8% |
| Ramshot Magnum | <<locked>> | 88% | 53,838 psi | 84% | 3176 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,769 psi | 61% | 2149 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 54,839 psi | 86% | 3297 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 92% | 54,288 psi | 85% | 3258 fps | 99.2% |
| Rottweil R 904 | <<locked>> | 84% | 57,246 psi | 90% | 3202 fps | 99.8% |
| Rottweil R 905 | <<locked>> | 84% | 56,202 psi | 88% | 3215 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 55,825 psi | 87% | 3209 fps | 100% |
| Somchem S361 | <<locked>> | 82% | 55,042 psi | 86% | 3130 fps | 99.3% |
| Somchem S385 | <<locked>> | 84% | 56,521 psi | 89% | 3179 fps | 100% |
| Vihtavuori N165 | <<locked>> | 88% | 56,608 psi | 89% | 3166 fps | 100% |
| Vihtavuori N170 | <<locked>> | 92% | 55,956 psi | 88% | 3182 fps | 96.5% |
| Vihtavuori N555 | <<locked>> | 84% | 55,941 psi | 88% | 3179 fps | 100% |
| Vihtavuori N560 | <<locked>> | 84% | 55,506 psi | 87% | 3261 fps | 99.4% |
| Vihtavuori N565 | <<locked>> | 90% | 56,826 psi | 89% | 3255 fps | 99.7% |
| Vihtavuori N568 | <<locked>> | 92% | 54,679 psi | 86% | 3261 fps | 98.9% |
| Vihtavuori N570 | <<locked>> | 94% | 56,101 psi | 88% | 3330 fps | 97.6% |
| Winchester StaBALL HD | <<locked>> | 86% | 54,694 psi | 86% | 3241 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 86% | 56,492 psi | 89% | 3176 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% | 45,614 psi | 71% | 2963 fps | 100% |
| Accurate High Country | <<locked>> | 80% | 50,140 psi | 79% | 3169 fps | 99.1% |
| Accurate MAGPRO | <<locked>> | 80% | 47,616 psi | 75% | 3107 fps | 97.7% |
| ADI AR 2209 | <<locked>> | 80% | 49,676 psi | 78% | 3107 fps | 99.6% |
| ADI AR 2213 | <<locked>> | 80% | 44,904 psi | 70% | 3045 fps | 98.1% |
| ADI AR 2217 | <<locked>> | 82% | 35,882 psi | 56% | 2822 fps | 95.7% |
| ADI AR 2218 | 116.6 gr | 94% | 47,471 psi | 74% | 3179 fps | 96% |
| ADI AR 2225 | <<locked>> | 80% | 30,821 psi | 48% | 2717 fps | 96.6% |
| Alliant Reloder-19 | <<locked>> | 80% | 49,487 psi | 78% | 3097 fps | 99.6% |
| Alliant Reloder-22 | <<locked>> | 80% | 45,672 psi | 72% | 3048 fps | 99.1% |
| Alliant Reloder-23 | <<locked>> | 80% | 44,440 psi | 70% | 2979 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 38,638 psi | 61% | 2913 fps | 99.8% |
| Alliant Reloder-26 | <<locked>> | 80% | 50,894 psi | 80% | 3169 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 90% | 45,542 psi | 71% | 3094 fps | 95.3% |
| Alliant Reloder-50 | <<locked>> | 96% | 49,240 psi | 77% | 3159 fps | 95.9% |
| Baschieri & Pellagri 109 | <<locked>> | 82% | 45,948 psi | 72% | 3009 fps | 95.8% |
| Bofors RP15 | <<locked>> | 80% | 42,511 psi | 67% | 2979 fps | 98.4% |
| Bofors RP30 | <<locked>> | 80% | 36,071 psi | 57% | 2838 fps | 95.8% |
| Bofors RP5 | <<locked>> | 80% | 45,672 psi | 72% | 3048 fps | 99.1% |
| Hodgdon H1000 | <<locked>> | 80% | 36,419 psi | 57% | 2838 fps | 96.6% |
| Hodgdon H4831 | <<locked>> | 80% | 47,398 psi | 74% | 3041 fps | 98.1% |
| Hodgdon H4831 SC | <<locked>> | 80% | 46,586 psi | 73% | 3025 fps | 97.9% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 53,519 psi | 84% | 3084 fps | 100% |
| Hodgdon Retumbo | 93.7 gr | 80% | 37,710 psi | 59% | 2959 fps | 98.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,384 psi | 44% | 1883 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 48,153 psi | 75% | 3028 fps | 98.4% |
| IMR 7828 SSC | <<locked>> | 80% | 43,700 psi | 68% | 3022 fps | 97.8% |
| IMR 8133 Enduron | <<locked>> | 86% | 34,998 psi | 55% | 2825 fps | 95.1% |
| Lovex S071 | <<locked>> | 80% | 39,233 psi | 61% | 2828 fps | 99.4% |
| Norma 217 | <<locked>> | 82% | 30,719 psi | 48% | 2720 fps | 95.5% |
| Norma MRP | <<locked>> | 80% | 48,675 psi | 76% | 3127 fps | 99.9% |
| Ramshot Grand | <<locked>> | 80% | 44,005 psi | 69% | 3038 fps | 98.3% |
| Ramshot Magnum | <<locked>> | 80% | 39,798 psi | 62% | 2900 fps | 98.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,138 psi | 46% | 1926 fps | 100% |
| ReloadSwiss RS 76 | 100.3 gr | 80% | 37,231 psi | 58% | 2933 fps | 99% |
| ReloadSwiss RS 80 | <<locked>> | 84% | 39,987 psi | 63% | 2956 fps | 95.6% |
| Rottweil R 904 | <<locked>> | 80% | 50,270 psi | 79% | 3077 fps | 99.1% |
| Rottweil R 905 | <<locked>> | 80% | 49,211 psi | 77% | 3087 fps | 99.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 48,863 psi | 77% | 3084 fps | 99.6% |
| Somchem S361 | <<locked>> | 80% | 51,430 psi | 81% | 3064 fps | 98.8% |
| Somchem S385 | <<locked>> | 80% | 49,545 psi | 78% | 3058 fps | 99.9% |
| Vihtavuori N165 | <<locked>> | 80% | 43,424 psi | 68% | 2927 fps | 99.1% |
| Vihtavuori N170 | <<locked>> | 90% | 52,344 psi | 82% | 3120 fps | 95.7% |
| Vihtavuori N555 | <<locked>> | 80% | 49,168 psi | 77% | 3068 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 48,211 psi | 76% | 3120 fps | 98.4% |
| Vihtavuori N565 | <<locked>> | 80% | 40,234 psi | 63% | 2920 fps | 96.5% |
| Vihtavuori N568 | <<locked>> | 84% | 40,901 psi | 64% | 2976 fps | 95.3% |
| Vihtavuori N570 | <<locked>> | 90% | 48,457 psi | 76% | 3179 fps | 95.7% |
| Winchester StaBALL HD | <<locked>> | 80% | 43,352 psi | 68% | 3045 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 45,788 psi | 72% | 2982 fps | 99.1% |
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 50 powders for .30-378 Weath. Mag. loaded with the .308 | 165gr | RWS Doppelkern. ADI AR 2218 delivers the highest muzzle velocity at 3,343 fps; across all powders the maximum-charge window runs from 2,100 fps to 3,343 fps. Alliant Reloder-50 gives the best case fill at 100 %, and 50 of the 50 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 165.0 gr projectile in 0.308" calls for a 1:16.5 twist; slower twists will usually not stabilise this weight. Alliant Reloder-50, Hodgdon TrailBoss, IMR 8133 Enduron 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 | 165gr | RWS Doppelkern 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.