Load Specifications
Load data in caliber .30-378 Weath. Mag. with .3085 | 150gr | Prvi Partizan FMJ bullet and 57 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>> | 88% | 55,259 psi | 87% | 3255 fps | 100% |
| Accurate MAGPRO | <<locked>> | 86% | 54,070 psi | 85% | 3350 fps | 98.2% |
| ADI AR 2209 | <<locked>> | 86% | 56,304 psi | 88% | 3350 fps | 99.7% |
| ADI AR 2213 | <<locked>> | 88% | 54,839 psi | 86% | 3360 fps | 99.1% |
| ADI AR 2217 | <<locked>> | 98% | 57,464 psi | 90% | 3396 fps | 99.7% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 54,099 psi | 85% | 3425 fps | 96.7% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 56,260 psi | 88% | 3412 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 86% | 56,666 psi | 89% | 3346 fps | 99.8% |
| Alliant Reloder-16 | <<locked>> | 82% | 56,405 psi | 88% | 3343 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 56,043 psi | 88% | 3337 fps | 99.7% |
| Alliant Reloder-22 | <<locked>> | 88% | 55,317 psi | 87% | 3356 fps | 99.7% |
| Alliant Reloder-23 | <<locked>> | 90% | 56,956 psi | 89% | 3320 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 94% | 57,363 psi | 90% | 3396 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 84% | 53,722 psi | 84% | 3346 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 98% | 55,767 psi | 87% | 3415 fps | 97.1% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 55,608 psi | 87% | 3307 fps | 97.2% |
| Bofors RP15 | <<locked>> | 90% | 54,679 psi | 86% | 3343 fps | 99.6% |
| Bofors RP30 | <<locked>> | 96% | 57,188 psi | 90% | 3406 fps | 99.7% |
| Bofors RP5 | <<locked>> | 88% | 55,317 psi | 87% | 3356 fps | 99.7% |
| Hodgdon H1000 | <<locked>> | 94% | 55,071 psi | 86% | 3353 fps | 99.7% |
| Hodgdon H4831 | <<locked>> | 86% | 54,027 psi | 85% | 3284 fps | 98.5% |
| Hodgdon H4831 SC | <<locked>> | 88% | 56,797 psi | 89% | 3333 fps | 98.9% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 56,594 psi | 89% | 3258 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 94% | 56,376 psi | 88% | 3488 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,594 psi | 59% | 2185 fps | 100% |
| IMR 4350 | <<locked>> | 82% | 55,129 psi | 86% | 3268 fps | 99.9% |
| IMR 4831 | <<locked>> | 82% | 55,753 psi | 87% | 3274 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 86% | 54,520 psi | 85% | 3264 fps | 98.7% |
| IMR 7828 SSC | <<locked>> | 90% | 56,956 psi | 89% | 3406 fps | 99.4% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 51,387 psi | 81% | 3314 fps | 99% |
| Lovex S070 | <<locked>> | 82% | 57,174 psi | 90% | 3301 fps | 100% |
| Lovex S071 | <<locked>> | 94% | 56,869 psi | 89% | 3281 fps | 100% |
| Norma 204 | <<locked>> | 82% | 56,405 psi | 88% | 3327 fps | 99.7% |
| Norma 217ᴾ | <<locked>> | 100% | 52,446 psi | 82% | 3343 fps | 100% |
| Norma MRP | <<locked>> | 86% | 55,376 psi | 87% | 3373 fps | 100% |
| Norma URP | <<locked>> | 82% | 57,145 psi | 90% | 3320 fps | 100% |
| Ramshot Grand | <<locked>> | 88% | 54,157 psi | 85% | 3356 fps | 99.3% |
| Ramshot Hunter | <<locked>> | 82% | 56,405 psi | 88% | 3330 fps | 100% |
| Ramshot Magnum | <<locked>> | 92% | 57,087 psi | 89% | 3350 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,450 psi | 60% | 2231 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 57,740 psi | 90% | 3474 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 57,087 psi | 89% | 3425 fps | 98.9% |
| Rottweil R 904 | <<locked>> | 86% | 57,029 psi | 89% | 3317 fps | 99.3% |
| Rottweil R 905 | <<locked>> | 86% | 55,666 psi | 87% | 3327 fps | 99.8% |
| Shooters World SW4350 | <<locked>> | 82% | 57,174 psi | 90% | 3301 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 55,274 psi | 87% | 3323 fps | 99.7% |
| Somchem S361 | <<locked>> | 84% | 54,911 psi | 86% | 3238 fps | 98.7% |
| Somchem S365 | <<locked>> | 82% | 54,998 psi | 86% | 3264 fps | 100% |
| Somchem S385 | <<locked>> | 86% | 56,202 psi | 88% | 3294 fps | 100% |
| Vihtavuori N165 | <<locked>> | 90% | 56,115 psi | 88% | 3278 fps | 99.9% |
| Vihtavuori N555 | <<locked>> | 86% | 55,129 psi | 86% | 3294 fps | 100% |
| Vihtavuori N560 | <<locked>> | 86% | 54,824 psi | 86% | 3373 fps | 98.8% |
| Vihtavuori N565 | <<locked>> | 92% | 55,840 psi | 88% | 3360 fps | 99.1% |
| Vihtavuori N568 | <<locked>> | 96% | 57,392 psi | 90% | 3428 fps | 98.6% |
| Vihtavuori N570 | <<locked>> | 96% | 54,534 psi | 85% | 3419 fps | 96.3% |
| Winchester StaBALL HD | <<locked>> | 90% | 57,116 psi | 90% | 3415 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 88% | 56,057 psi | 88% | 3291 fps | 99.8% |
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% | 42,032 psi | 66% | 3002 fps | 99.4% |
| Accurate MAGPRO | <<locked>> | 80% | 43,584 psi | 68% | 3130 fps | 95.5% |
| ADI AR 2209 | <<locked>> | 80% | 46,021 psi | 72% | 3150 fps | 98.4% |
| ADI AR 2213 | <<locked>> | 80% | 41,321 psi | 65% | 3071 fps | 96% |
| ADI AR 2217 | <<locked>> | 86% | 37,782 psi | 59% | 2976 fps | 95.2% |
| ADI AR 2218 | <<locked>> | 98% | 50,241 psi | 79% | 3343 fps | 95.5% |
| ADI AR 2225 | <<locked>> | 84% | 32,256 psi | 51% | 2861 fps | 96% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 46,398 psi | 73% | 3150 fps | 98.5% |
| Alliant Reloder-16 | <<locked>> | 80% | 52,866 psi | 83% | 3287 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 45,992 psi | 72% | 3143 fps | 98.4% |
| Alliant Reloder-22 | <<locked>> | 80% | 42,018 psi | 66% | 3084 fps | 97.6% |
| Alliant Reloder-23 | <<locked>> | 80% | 40,727 psi | 64% | 3028 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 35,201 psi | 55% | 2940 fps | 98.6% |
| Alliant Reloder-26 | <<locked>> | 80% | 46,209 psi | 72% | 3209 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 96% | 51,619 psi | 81% | 3333 fps | 96% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 48,921 psi | 77% | 3176 fps | 95.5% |
| Bofors RP15 | <<locked>> | 80% | 39,088 psi | 61% | 3009 fps | 96.5% |
| Bofors RP30 | <<locked>> | 84% | 37,739 psi | 59% | 2989 fps | 95.3% |
| Bofors RP5 | <<locked>> | 80% | 42,018 psi | 66% | 3084 fps | 97.6% |
| Hodgdon H1000 | <<locked>> | 82% | 35,853 psi | 56% | 2923 fps | 95% |
| Hodgdon H4831 | <<locked>> | 80% | 43,947 psi | 69% | 3077 fps | 96.2% |
| Hodgdon H4831 SC | <<locked>> | 80% | 43,163 psi | 68% | 3061 fps | 96% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 49,719 psi | 78% | 3146 fps | 100% |
| Hodgdon Retumbo | 92.8 gr | 80% | 34,345 psi | 54% | 2966 fps | 95.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,166 psi | 44% | 1959 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 51,692 psi | 81% | 3205 fps | 99.7% |
| IMR 4831 | <<locked>> | 80% | 52,185 psi | 82% | 3215 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 45,049 psi | 71% | 3074 fps | 96.8% |
| IMR 7828 SSC | <<locked>> | 80% | 40,016 psi | 63% | 3051 fps | 95.6% |
| IMR 8133 Enduron | <<locked>> | 92% | 38,914 psi | 61% | 3035 fps | 95.6% |
| Lovex S070 | <<locked>> | 80% | 53,751 psi | 84% | 3241 fps | 100% |
| Lovex S071 | <<locked>> | 80% | 36,071 psi | 57% | 2861 fps | 98.1% |
| Norma 204 | <<locked>> | 80% | 52,605 psi | 82% | 3261 fps | 99.3% |
| Norma 217 | <<locked>> | 88% | 34,040 psi | 53% | 2923 fps | 96% |
| Norma MRP | <<locked>> | 80% | 44,628 psi | 70% | 3163 fps | 99.2% |
| Norma URP | <<locked>> | 80% | 53,621 psi | 84% | 3261 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 40,001 psi | 63% | 3058 fps | 96.1% |
| Ramshot Hunter | <<locked>> | 80% | 52,678 psi | 83% | 3261 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 36,013 psi | 56% | 2920 fps | 96.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,877 psi | 45% | 2005 fps | 100% |
| ReloadSwiss RS 76 | 99.3 gr | 80% | 33,707 psi | 53% | 2933 fps | 96.5% |
| ReloadSwiss RS 80 | <<locked>> | 88% | 41,887 psi | 66% | 3114 fps | 95.2% |
| Rottweil R 904 | <<locked>> | 80% | 46,876 psi | 73% | 3123 fps | 97.7% |
| Rottweil R 905 | <<locked>> | 80% | 45,527 psi | 71% | 3130 fps | 98.4% |
| Shooters World SW4350 | <<locked>> | 80% | 53,751 psi | 84% | 3241 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 45,179 psi | 71% | 3123 fps | 98.3% |
| Somchem S361 | <<locked>> | 80% | 47,964 psi | 75% | 3107 fps | 97.4% |
| Somchem S365 | <<locked>> | 80% | 51,329 psi | 80% | 3209 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 46,021 psi | 72% | 3104 fps | 99.1% |
| Vihtavuori N165 | <<locked>> | 80% | 40,132 psi | 63% | 2959 fps | 97.6% |
| Vihtavuori N555 | <<locked>> | 80% | 45,295 psi | 71% | 3117 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 44,353 psi | 70% | 3153 fps | 96.5% |
| Vihtavuori N565 | <<locked>> | 82% | 39,421 psi | 62% | 3009 fps | 95.1% |
| Vihtavuori N568 | <<locked>> | 90% | 46,209 psi | 72% | 3205 fps | 96% |
| Vihtavuori N570 | 113.1 gr | 94% | 50,691 psi | 79% | 3343 fps | 95.3% |
| Winchester StaBALL HD | <<locked>> | 80% | 38,653 psi | 61% | 3077 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 42,366 psi | 66% | 3022 fps | 97.7% |
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 | 150gr | Prvi Partizan FMJ. Hodgdon Retumbo delivers the highest muzzle velocity at 3,488 fps; across all powders the maximum-charge window runs from 2,185 fps to 3,488 fps. ADI AR 2218 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 150.0 gr projectile in 0.3085" calls for a 1:14.5 twist; slower twists will usually not stabilise this weight. ADI AR 2218, ADI AR 2225, 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 | 150gr | Prvi Partizan FMJ 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.