Load Specifications
Load data in caliber .30-378 Weath. Mag. with .3085 | 168gr | Prvi Partizan HP BT bullet and 49 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Vihtavuori N570, Hodgdon Retumbo and ReloadSwiss RS 76.
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% | 54,781 psi | 86% | 3100 fps | 100% |
| Accurate MAGPRO | <<locked>> | 86% | 57,624 psi | 90% | 3274 fps | 99.4% |
| ADI AR 2209 | <<locked>> | 84% | 55,753 psi | 87% | 3192 fps | 100% |
| ADI AR 2213 | <<locked>> | 86% | 54,288 psi | 85% | 3205 fps | 99.6% |
| ADI AR 2217 | <<locked>> | 96% | 57,174 psi | 90% | 3245 fps | 99.9% |
| ADI AR 2218 | <<locked>> | 98% | 53,795 psi | 84% | 3297 fps | 97.8% |
| ADI AR 2225 | <<locked>> | 98% | 56,173 psi | 88% | 3268 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 55,361 psi | 87% | 3182 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 86% | 54,824 psi | 86% | 3202 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 88% | 56,782 psi | 89% | 3166 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 92% | 57,261 psi | 90% | 3241 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 84% | 57,537 psi | 90% | 3255 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 96% | 55,651 psi | 87% | 3278 fps | 98% |
| Alliant Reloder-50ᴾ | <<locked>> | 100% | 55,376 psi | 87% | 3261 fps | 97.5% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 54,853 psi | 86% | 3159 fps | 98% |
| Bofors RP15 | <<locked>> | 88% | 54,360 psi | 85% | 3192 fps | 99.9% |
| Bofors RP30 | <<locked>> | 94% | 57,043 psi | 89% | 3258 fps | 99.9% |
| Bofors RP5 | <<locked>> | 86% | 54,824 psi | 86% | 3202 fps | 100% |
| Hodgdon H1000 | <<locked>> | 92% | 54,708 psi | 86% | 3205 fps | 100% |
| Hodgdon H4831 | <<locked>> | 86% | 57,174 psi | 90% | 3199 fps | 99.5% |
| Hodgdon H4831 SC | <<locked>> | 86% | 55,985 psi | 88% | 3179 fps | 99.4% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 55,956 psi | 88% | 3097 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 92% | 56,449 psi | 88% | 3337 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,782 psi | 59% | 2070 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 86% | 57,232 psi | 90% | 3173 fps | 99.6% |
| IMR 7828 SSC | <<locked>> | 88% | 56,681 psi | 89% | 3255 fps | 99.8% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 55,172 psi | 86% | 3241 fps | 99.8% |
| Lovex S071 | <<locked>> | 92% | 56,579 psi | 89% | 3130 fps | 100% |
| Norma 217ᴾ | <<locked>> | 100% | 56,565 psi | 89% | 3268 fps | 100% |
| Norma MRP | <<locked>> | 84% | 54,868 psi | 86% | 3215 fps | 100% |
| Ramshot Grand | <<locked>> | 86% | 53,983 psi | 85% | 3209 fps | 99.7% |
| Ramshot Magnum | <<locked>> | 90% | 56,536 psi | 89% | 3199 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,725 psi | 61% | 2119 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 57,653 psi | 90% | 3320 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 94% | 56,826 psi | 89% | 3284 fps | 99.5% |
| Rottweil R 904 | <<locked>> | 84% | 56,260 psi | 88% | 3163 fps | 99.7% |
| Rottweil R 905 | <<locked>> | 84% | 55,158 psi | 86% | 3173 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 54,781 psi | 86% | 3169 fps | 100% |
| Somchem S361 | <<locked>> | 84% | 57,696 psi | 90% | 3150 fps | 99.6% |
| Somchem S385 | <<locked>> | 84% | 55,419 psi | 87% | 3136 fps | 100% |
| Vihtavuori N165 | <<locked>> | 88% | 55,448 psi | 87% | 3123 fps | 100% |
| Vihtavuori N170 | <<locked>> | 92% | 54,853 psi | 86% | 3143 fps | 96.3% |
| Vihtavuori N555 | <<locked>> | 84% | 54,940 psi | 86% | 3140 fps | 100% |
| Vihtavuori N560 | <<locked>> | 84% | 54,288 psi | 85% | 3215 fps | 99.3% |
| Vihtavuori N565 | <<locked>> | 90% | 55,564 psi | 87% | 3215 fps | 99.6% |
| Vihtavuori N568 | <<locked>> | 94% | 57,232 psi | 90% | 3287 fps | 99.2% |
| Vihtavuori N570 | <<locked>> | 94% | 54,491 psi | 85% | 3281 fps | 97.4% |
| Winchester StaBALL HD | <<locked>> | 88% | 57,290 psi | 90% | 3261 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 86% | 55,317 psi | 87% | 3133 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% | 44,686 psi | 70% | 2927 fps | 100% |
| Accurate MAGPRO | <<locked>> | 80% | 46,557 psi | 73% | 3064 fps | 97.5% |
| ADI AR 2209 | <<locked>> | 80% | 48,704 psi | 76% | 3068 fps | 99.5% |
| ADI AR 2213 | <<locked>> | 80% | 43,961 psi | 69% | 3002 fps | 97.9% |
| ADI AR 2217 | <<locked>> | 82% | 35,041 psi | 55% | 2779 fps | 95.4% |
| ADI AR 2218 | <<locked>> | 94% | 46,238 psi | 72% | 3130 fps | 95.5% |
| ADI AR 2225 | <<locked>> | 80% | 30,139 psi | 47% | 2677 fps | 96.3% |
| Alliant Reloder-19 | <<locked>> | 80% | 48,573 psi | 76% | 3058 fps | 99.5% |
| Alliant Reloder-22 | <<locked>> | 80% | 44,788 psi | 70% | 3009 fps | 99% |
| Alliant Reloder-23 | <<locked>> | 80% | 43,424 psi | 68% | 2940 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 37,710 psi | 59% | 2874 fps | 99.8% |
| Alliant Reloder-26 | <<locked>> | 80% | 49,617 psi | 78% | 3127 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 92% | 47,805 psi | 75% | 3127 fps | 96.1% |
| Alliant Reloder-50 | <<locked>> | 96% | 47,616 psi | 75% | 3110 fps | 95.4% |
| Baschieri & Pellagri 109 | <<locked>> | 82% | 45,150 psi | 71% | 2969 fps | 95.6% |
| Bofors RP15 | <<locked>> | 80% | 41,611 psi | 65% | 2940 fps | 98.3% |
| Bofors RP30 | <<locked>> | 80% | 35,215 psi | 55% | 2799 fps | 95.5% |
| Bofors RP5 | <<locked>> | 80% | 44,788 psi | 70% | 3009 fps | 99% |
| Hodgdon H1000 | <<locked>> | 80% | 35,665 psi | 56% | 2799 fps | 96.3% |
| Hodgdon H4831 | <<locked>> | 80% | 46,543 psi | 73% | 3002 fps | 97.9% |
| Hodgdon H4831 SC | <<locked>> | 80% | 45,701 psi | 72% | 2986 fps | 97.8% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 52,402 psi | 82% | 3041 fps | 100% |
| Hodgdon Retumbo | 90.9 gr | 80% | 36,854 psi | 58% | 2920 fps | 97.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,384 psi | 44% | 1857 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 47,311 psi | 74% | 2989 fps | 98.2% |
| IMR 7828 SSC | <<locked>> | 80% | 42,714 psi | 67% | 2982 fps | 97.7% |
| IMR 8133 Enduron | <<locked>> | 88% | 36,579 psi | 57% | 2851 fps | 95.9% |
| Lovex S071 | <<locked>> | 80% | 38,522 psi | 60% | 2792 fps | 99.4% |
| Norma 217 | <<locked>> | 82% | 29,834 psi | 47% | 2677 fps | 95.2% |
| Norma MRP | <<locked>> | 80% | 47,630 psi | 75% | 3084 fps | 99.9% |
| Ramshot Grand | <<locked>> | 80% | 42,902 psi | 67% | 2995 fps | 98.1% |
| Ramshot Magnum | <<locked>> | 80% | 38,754 psi | 61% | 2861 fps | 98.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,037 psi | 46% | 1900 fps | 100% |
| ReloadSwiss RS 76 | 97.3 gr | 80% | 36,289 psi | 57% | 2894 fps | 98.8% |
| ReloadSwiss RS 80 | <<locked>> | 84% | 38,827 psi | 61% | 2913 fps | 95.3% |
| Rottweil R 904 | <<locked>> | 80% | 49,356 psi | 77% | 3035 fps | 99% |
| Rottweil R 905 | <<locked>> | 80% | 48,211 psi | 76% | 3048 fps | 99.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 47,877 psi | 75% | 3041 fps | 99.5% |
| Somchem S361 | <<locked>> | 80% | 50,473 psi | 79% | 3022 fps | 98.7% |
| Somchem S385 | <<locked>> | 80% | 48,689 psi | 76% | 3018 fps | 99.8% |
| Vihtavuori N165 | <<locked>> | 80% | 42,583 psi | 67% | 2884 fps | 99% |
| Vihtavuori N170 | <<locked>> | 90% | 51,184 psi | 80% | 3074 fps | 95.3% |
| Vihtavuori N555 | <<locked>> | 80% | 48,080 psi | 75% | 3025 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 47,181 psi | 74% | 3081 fps | 98.2% |
| Vihtavuori N565 | <<locked>> | 80% | 39,407 psi | 62% | 2884 fps | 96.3% |
| Vihtavuori N568 | <<locked>> | 84% | 39,943 psi | 63% | 2933 fps | 95.1% |
| Vihtavuori N570 | 106.1 gr | 90% | 47,152 psi | 74% | 3133 fps | 95.4% |
| Winchester StaBALL HD | <<locked>> | 80% | 42,061 psi | 66% | 3002 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 44,962 psi | 70% | 2946 fps | 99% |
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 57 powders for .30-378 Weath. Mag. loaded with the .3085 | 168gr | Prvi Partizan HP BT. 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 57 of the 57 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 0.3085" calls for a 1:13.0 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. Vihtavuori N570, Hodgdon Retumbo, ReloadSwiss RS 76 rank at the top here: for .30-378 Weath. Mag. with the .3085 | 168gr | Prvi Partizan HP BT they combine a high case fill with complete burn and sit in the upper velocity band. 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.