Load Specifications
Load data in caliber .30-378 Weath. Mag. with .3085 | 190gr | 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 ADI AR 2218, 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>> | 84% | 55,492 psi | 87% | 2953 fps | 100% |
| Accurate 8700ᴾ | <<locked>> | 100% | 50,792 psi | 80% | 2986 fps | 97.6% |
| Accurate MAGPRO | <<locked>> | 82% | 54,476 psi | 85% | 3064 fps | 99.6% |
| ADI AR 2209 | <<locked>> | 82% | 56,159 psi | 88% | 3038 fps | 100% |
| ADI AR 2213 | <<locked>> | 84% | 55,056 psi | 86% | 3058 fps | 100% |
| ADI AR 2217 | <<locked>> | 92% | 54,476 psi | 85% | 3045 fps | 100% |
| ADI AR 2218 | <<locked>> | 96% | 54,926 psi | 86% | 3173 fps | 99.1% |
| ADI AR 2225 | <<locked>> | 94% | 54,041 psi | 85% | 3068 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 55,811 psi | 87% | 3028 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 84% | 55,666 psi | 87% | 3054 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 86% | 57,682 psi | 90% | 3009 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 88% | 54,694 psi | 86% | 3035 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 94% | 57,072 psi | 89% | 3150 fps | 99.1% |
| Alliant Reloder-50 | <<locked>> | 98% | 57,217 psi | 90% | 3143 fps | 98.8% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 55,230 psi | 87% | 3018 fps | 98.9% |
| Bofors RP15 | <<locked>> | 86% | 55,085 psi | 86% | 3045 fps | 100% |
| Bofors RP30 | <<locked>> | 90% | 54,636 psi | 86% | 3058 fps | 100% |
| Bofors RP5 | <<locked>> | 84% | 55,666 psi | 87% | 3054 fps | 100% |
| Hodgdon H1000 | <<locked>> | 90% | 55,912 psi | 88% | 3064 fps | 100% |
| Hodgdon H4831 | <<locked>> | 84% | 57,522 psi | 90% | 3048 fps | 99.9% |
| Hodgdon H4831 SC | <<locked>> | 84% | 56,492 psi | 89% | 3031 fps | 99.9% |
| Hodgdon Retumbo | <<locked>> | 88% | 54,317 psi | 85% | 3130 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,971 psi | 60% | 1959 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 84% | 57,435 psi | 90% | 3018 fps | 99.9% |
| IMR 7828 SSC | <<locked>> | 86% | 57,522 psi | 90% | 3107 fps | 100% |
| IMR 7977 Enduron | <<locked>> | 90% | 56,217 psi | 88% | 2976 fps | 96.3% |
| IMR 8133 Enduron | <<locked>> | 98% | 56,797 psi | 89% | 3110 fps | 100% |
| Lovex S071 | <<locked>> | 90% | 57,508 psi | 90% | 2982 fps | 100% |
| Norma 217 | <<locked>> | 96% | 54,679 psi | 86% | 3077 fps | 100% |
| Norma MRP | <<locked>> | 82% | 55,753 psi | 87% | 3068 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 54,969 psi | 86% | 3068 fps | 100% |
| Ramshot Magnum | <<locked>> | 88% | 57,580 psi | 90% | 3051 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 39,102 psi | 61% | 2005 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 54,882 psi | 86% | 3110 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 90% | 54,070 psi | 85% | 3081 fps | 99.7% |
| Rottweil R 904 | <<locked>> | 82% | 56,434 psi | 88% | 3005 fps | 100% |
| Rottweil R 905 | <<locked>> | 82% | 55,695 psi | 87% | 3022 fps | 100% |
| SNPE Vectan SP 13ᴾ | <<locked>> | 100% | 52,794 psi | 83% | 2999 fps | 97.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 55,332 psi | 87% | 3018 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 55,956 psi | 88% | 2989 fps | 100% |
| Vihtavuori N165 | <<locked>> | 86% | 56,115 psi | 88% | 2976 fps | 100% |
| Vihtavuori N170 | <<locked>> | 90% | 55,550 psi | 87% | 3012 fps | 97.6% |
| Vihtavuori N555 | <<locked>> | 82% | 55,709 psi | 87% | 2986 fps | 100% |
| Vihtavuori N560 | <<locked>> | 82% | 55,071 psi | 86% | 3074 fps | 99.9% |
| Vihtavuori N565 | <<locked>> | 88% | 56,507 psi | 89% | 3074 fps | 100% |
| Vihtavuori N568 | <<locked>> | 90% | 54,549 psi | 85% | 3084 fps | 99.5% |
| Vihtavuori N570 | <<locked>> | 92% | 56,043 psi | 88% | 3156 fps | 98.7% |
| Winchester StaBALL HD | <<locked>> | 84% | 54,795 psi | 86% | 3048 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 84% | 55,738 psi | 87% | 2986 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% | 48,530 psi | 76% | 2844 fps | 100% |
| Accurate 8700 | <<locked>> | 96% | 43,903 psi | 69% | 2854 fps | 95.8% |
| Accurate MAGPRO | <<locked>> | 80% | 50,734 psi | 80% | 2999 fps | 99.2% |
| ADI AR 2209 | <<locked>> | 80% | 52,605 psi | 82% | 2979 fps | 100% |
| ADI AR 2213 | <<locked>> | 80% | 47,805 psi | 75% | 2930 fps | 99.5% |
| ADI AR 2217 | <<locked>> | 80% | 35,795 psi | 56% | 2667 fps | 97.2% |
| ADI AR 2218 | 105 gr | 88% | 40,930 psi | 64% | 2874 fps | 95.2% |
| ADI AR 2225 | <<locked>> | 80% | 33,170 psi | 52% | 2644 fps | 99% |
| Alliant Reloder-19 | <<locked>> | 80% | 52,359 psi | 82% | 2972 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 80% | 48,559 psi | 76% | 2933 fps | 99.9% |
| Alliant Reloder-23 | <<locked>> | 80% | 47,355 psi | 74% | 2851 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 41,597 psi | 65% | 2808 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 86% | 42,337 psi | 66% | 2867 fps | 95.7% |
| Alliant Reloder-50 | <<locked>> | 90% | 42,511 psi | 67% | 2861 fps | 95.2% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 45,353 psi | 71% | 2835 fps | 97% |
| Bofors RP15 | <<locked>> | 80% | 45,310 psi | 71% | 2867 fps | 99.6% |
| Bofors RP30 | <<locked>> | 80% | 38,870 psi | 61% | 2749 fps | 98.1% |
| Bofors RP5 | <<locked>> | 80% | 48,559 psi | 76% | 2933 fps | 99.9% |
| Hodgdon H1000 | <<locked>> | 80% | 39,059 psi | 61% | 2749 fps | 98.7% |
| Hodgdon H4831 | <<locked>> | 80% | 50,169 psi | 79% | 2923 fps | 99.4% |
| Hodgdon H4831 SC | <<locked>> | 80% | 49,255 psi | 77% | 2907 fps | 99.3% |
| Hodgdon Retumbo | 90.1 gr | 80% | 40,712 psi | 64% | 2871 fps | 99.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,587 psi | 45% | 1752 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 50,676 psi | 79% | 2907 fps | 99.5% |
| IMR 7828 SSC | <<locked>> | 80% | 46,760 psi | 73% | 2917 fps | 99.4% |
| IMR 7977 Enduron | <<locked>> | 88% | 52,736 psi | 83% | 2913 fps | 95.5% |
| IMR 8133 Enduron | <<locked>> | 82% | 32,938 psi | 52% | 2618 fps | 95.9% |
| Lovex S071 | <<locked>> | 80% | 41,843 psi | 66% | 2720 fps | 100% |
| Norma 217 | <<locked>> | 80% | 31,125 psi | 49% | 2582 fps | 97.3% |
| Norma MRP | <<locked>> | 80% | 52,054 psi | 82% | 3005 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 47,427 psi | 74% | 2936 fps | 99.6% |
| Ramshot Magnum | <<locked>> | 80% | 42,699 psi | 67% | 2802 fps | 99.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,414 psi | 46% | 1795 fps | 100% |
| ReloadSwiss RS 76 | 96.4 gr | 80% | 40,277 psi | 63% | 2844 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 80% | 37,101 psi | 58% | 2733 fps | 96.1% |
| Rottweil R 904 | <<locked>> | 80% | 52,924 psi | 83% | 2949 fps | 99.9% |
| Rottweil R 905 | <<locked>> | 80% | 52,156 psi | 82% | 2963 fps | 100% |
| SNPE Vectan SP 13 | <<locked>> | 96% | 45,948 psi | 72% | 2871 fps | 95.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 51,808 psi | 81% | 2959 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 52,359 psi | 82% | 2930 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 46,079 psi | 72% | 2808 fps | 99.9% |
| Vihtavuori N170 | <<locked>> | 84% | 45,252 psi | 71% | 2818 fps | 95.1% |
| Vihtavuori N555 | <<locked>> | 80% | 52,185 psi | 82% | 2933 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 51,445 psi | 81% | 3009 fps | 99.6% |
| Vihtavuori N565 | <<locked>> | 80% | 43,076 psi | 68% | 2825 fps | 98.5% |
| Vihtavuori N568 | <<locked>> | 80% | 38,189 psi | 60% | 2753 fps | 95.9% |
| Vihtavuori N570 | <<locked>> | 84% | 41,930 psi | 66% | 2874 fps | 95.1% |
| Winchester StaBALL HD | <<locked>> | 80% | 47,210 psi | 74% | 2930 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 48,544 psi | 76% | 2867 fps | 99.9% |
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 56 powders for .30-378 Weath. Mag. loaded with the .3085 | 190gr | Prvi Partizan HP BT. ADI AR 2218 delivers the highest muzzle velocity at 3,173 fps; across all powders the maximum-charge window runs from 1,959 fps to 3,173 fps. Accurate 8700 gives the best case fill at 100 %, and 56 of the 56 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 60–90 %, leaving at least 10 % headroom. The 190.0 gr projectile in 0.3085" calls for a 1:13.0 twist; slower twists will usually not stabilise this weight. Accurate 8700, Hodgdon TrailBoss, Hodgdon US 869 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. ADI AR 2218, Hodgdon Retumbo, ReloadSwiss RS 76 rank at the top here: for .30-378 Weath. Mag. with the .3085 | 190gr | Prvi Partizan HP BT they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Hodgdon 50BMG, Hodgdon US 869, 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.