Load Specifications
Load data in caliber .30-378 Weath. Mag. with .311 | 182gr | Prvi Partizan FMJ BT bullet and 50 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ADI AR 2218, Vihtavuori N570 and Alliant Reloder-33.
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% | 57,261 psi | 90% | 3035 fps | 100% |
| Accurate 8700ᴾ | <<locked>> | 100% | 48,457 psi | 76% | 2992 fps | 96.6% |
| Accurate MAGPRO | <<locked>> | 84% | 56,202 psi | 88% | 3146 fps | 99.6% |
| ADI AR 2209 | <<locked>> | 82% | 54,375 psi | 85% | 3064 fps | 100% |
| ADI AR 2213 | <<locked>> | 86% | 56,869 psi | 89% | 3143 fps | 100% |
| ADI AR 2217 | <<locked>> | 94% | 55,985 psi | 88% | 3123 fps | 100% |
| ADI AR 2218 | <<locked>> | 98% | 56,652 psi | 89% | 3258 fps | 99% |
| ADI AR 2225 | <<locked>> | 96% | 55,477 psi | 87% | 3146 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 57,624 psi | 90% | 3114 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 86% | 57,363 psi | 90% | 3140 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 86% | 55,695 psi | 87% | 3038 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 90% | 56,275 psi | 88% | 3117 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 82% | 56,420 psi | 88% | 3127 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 94% | 54,534 psi | 85% | 3159 fps | 98.4% |
| Alliant Reloder-50 | <<locked>> | 98% | 54,549 psi | 85% | 3150 fps | 98% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 57,087 psi | 89% | 3100 fps | 98.9% |
| Bofors RP15 | <<locked>> | 88% | 56,768 psi | 89% | 3127 fps | 100% |
| Bofors RP30 | <<locked>> | 92% | 56,188 psi | 88% | 3140 fps | 100% |
| Bofors RP5 | <<locked>> | 86% | 57,363 psi | 90% | 3140 fps | 100% |
| Hodgdon H1000 | <<locked>> | 92% | 57,638 psi | 90% | 3146 fps | 100% |
| Hodgdon H4831 | <<locked>> | 84% | 55,680 psi | 87% | 3071 fps | 99.7% |
| Hodgdon H4831 SC | <<locked>> | 84% | 54,563 psi | 86% | 3054 fps | 99.6% |
| Hodgdon Retumbo | <<locked>> | 90% | 55,738 psi | 87% | 3212 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,898 psi | 59% | 1995 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 84% | 55,811 psi | 87% | 3048 fps | 99.8% |
| IMR 7828 SSC | <<locked>> | 86% | 55,477 psi | 87% | 3130 fps | 99.9% |
| IMR 8133 Enduron | <<locked>> | 98% | 54,505 psi | 85% | 3130 fps | 100% |
| Lovex S071 | <<locked>> | 90% | 55,579 psi | 87% | 3012 fps | 100% |
| Norma 217 | <<locked>> | 98% | 55,883 psi | 88% | 3153 fps | 100% |
| Norma MRP | <<locked>> | 84% | 57,609 psi | 90% | 3153 fps | 100% |
| Ramshot Grand | <<locked>> | 86% | 56,826 psi | 89% | 3153 fps | 100% |
| Ramshot Magnum | <<locked>> | 88% | 55,216 psi | 87% | 3074 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,885 psi | 61% | 2041 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 56,623 psi | 89% | 3199 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 92% | 55,796 psi | 87% | 3163 fps | 99.7% |
| Rottweil R 904 | <<locked>> | 82% | 54,766 psi | 86% | 3035 fps | 99.8% |
| Rottweil R 905 | <<locked>> | 84% | 57,522 psi | 90% | 3107 fps | 100% |
| SNPE Vectan SP 13ᴾ | <<locked>> | 100% | 50,575 psi | 79% | 3005 fps | 96.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 57,188 psi | 90% | 3104 fps | 100% |
| Somchem S361 | <<locked>> | 82% | 56,144 psi | 88% | 3025 fps | 99.7% |
| Somchem S385 | <<locked>> | 84% | 57,740 psi | 90% | 3068 fps | 100% |
| Vihtavuori N165 | <<locked>> | 86% | 54,302 psi | 85% | 3005 fps | 100% |
| Vihtavuori N170 | <<locked>> | 92% | 57,232 psi | 90% | 3091 fps | 97.5% |
| Vihtavuori N555 | <<locked>> | 84% | 57,406 psi | 90% | 3068 fps | 100% |
| Vihtavuori N560 | <<locked>> | 84% | 56,898 psi | 89% | 3159 fps | 99.8% |
| Vihtavuori N565 | <<locked>> | 88% | 54,476 psi | 85% | 3094 fps | 99.8% |
| Vihtavuori N568 | <<locked>> | 92% | 56,217 psi | 88% | 3169 fps | 99.5% |
| Vihtavuori N570 | <<locked>> | 94% | 57,522 psi | 90% | 3235 fps | 98.6% |
| Winchester StaBALL HD | <<locked>> | 86% | 56,391 psi | 88% | 3133 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 84% | 53,940 psi | 85% | 3012 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% | 46,818 psi | 73% | 2867 fps | 100% |
| Accurate 8700 | <<locked>> | 98% | 45,049 psi | 71% | 2923 fps | 95.5% |
| Accurate MAGPRO | <<locked>> | 80% | 48,892 psi | 77% | 3015 fps | 98.6% |
| ADI AR 2209 | <<locked>> | 80% | 50,894 psi | 80% | 3005 fps | 99.9% |
| ADI AR 2213 | <<locked>> | 80% | 46,079 psi | 72% | 2949 fps | 98.9% |
| ADI AR 2217 | <<locked>> | 80% | 34,432 psi | 54% | 2677 fps | 96.1% |
| ADI AR 2218 | 107 gr | 90% | 42,148 psi | 66% | 2946 fps | 95% |
| ADI AR 2225 | <<locked>> | 80% | 31,821 psi | 50% | 2648 fps | 98.1% |
| Alliant Reloder-19 | <<locked>> | 80% | 50,720 psi | 79% | 2995 fps | 99.9% |
| Alliant Reloder-22 | <<locked>> | 80% | 46,847 psi | 73% | 2953 fps | 99.7% |
| Alliant Reloder-23 | <<locked>> | 80% | 45,614 psi | 71% | 2877 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 39,871 psi | 62% | 2825 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 80% | 52,373 psi | 82% | 3064 fps | 100% |
| Alliant Reloder-33 | 106.5 gr | 88% | 43,497 psi | 68% | 2940 fps | 95.6% |
| Alliant Reloder-50 | <<locked>> | 92% | 43,526 psi | 68% | 2930 fps | 95% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 43,961 psi | 69% | 2851 fps | 96.1% |
| Bofors RP15 | <<locked>> | 80% | 43,685 psi | 68% | 2887 fps | 99.2% |
| Bofors RP30 | <<locked>> | 80% | 37,246 psi | 58% | 2759 fps | 97.2% |
| Bofors RP5 | <<locked>> | 80% | 46,847 psi | 73% | 2953 fps | 99.7% |
| Hodgdon H1000 | <<locked>> | 80% | 37,405 psi | 59% | 2759 fps | 97.8% |
| Hodgdon H4831 | <<locked>> | 80% | 48,544 psi | 76% | 2946 fps | 98.9% |
| Hodgdon H4831 SC | <<locked>> | 80% | 47,659 psi | 75% | 2930 fps | 98.8% |
| Hodgdon Retumbo | <<locked>> | 80% | 38,972 psi | 61% | 2884 fps | 99.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,500 psi | 45% | 1788 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 49,197 psi | 77% | 2930 fps | 99.1% |
| IMR 7828 SSC | <<locked>> | 80% | 45,005 psi | 71% | 2936 fps | 98.8% |
| IMR 8133 Enduron | <<locked>> | 84% | 33,736 psi | 53% | 2687 fps | 95.7% |
| Lovex S071 | <<locked>> | 80% | 40,350 psi | 63% | 2740 fps | 99.9% |
| Norma 217 | <<locked>> | 80% | 29,602 psi | 46% | 2585 fps | 96.1% |
| Norma MRP | <<locked>> | 80% | 49,995 psi | 78% | 3025 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 45,484 psi | 71% | 2949 fps | 99.1% |
| Ramshot Magnum | <<locked>> | 80% | 40,959 psi | 64% | 2818 fps | 99.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,312 psi | 46% | 1831 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 38,450 psi | 60% | 2854 fps | 99.7% |
| ReloadSwiss RS 80 | <<locked>> | 82% | 38,189 psi | 60% | 2808 fps | 96% |
| Rottweil R 904 | <<locked>> | 80% | 51,343 psi | 80% | 2976 fps | 99.6% |
| Rottweil R 905 | <<locked>> | 80% | 50,430 psi | 79% | 2989 fps | 99.9% |
| SNPE Vectan SP 13 | <<locked>> | 98% | 47,137 psi | 74% | 2943 fps | 95.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 50,082 psi | 78% | 2982 fps | 99.9% |
| Somchem S361 | <<locked>> | 80% | 52,489 psi | 82% | 2963 fps | 99.4% |
| Somchem S385 | <<locked>> | 80% | 50,705 psi | 79% | 2956 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 44,541 psi | 70% | 2831 fps | 99.7% |
| Vihtavuori N170 | <<locked>> | 86% | 46,731 psi | 73% | 2897 fps | 95% |
| Vihtavuori N555 | <<locked>> | 80% | 50,372 psi | 79% | 2959 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 49,472 psi | 78% | 3028 fps | 99.1% |
| Vihtavuori N565 | <<locked>> | 80% | 41,423 psi | 65% | 2838 fps | 97.7% |
| Vihtavuori N568 | <<locked>> | 82% | 39,276 psi | 62% | 2828 fps | 95.8% |
| Vihtavuori N570 | 102.5 gr | 88% | 46,470 psi | 73% | 3025 fps | 96.1% |
| Winchester StaBALL HD | <<locked>> | 80% | 45,020 psi | 71% | 2953 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 46,949 psi | 74% | 2890 fps | 99.7% |
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 .311 | 182gr | Prvi Partizan FMJ BT. ADI AR 2218 delivers the highest muzzle velocity at 3,258 fps; across all powders the maximum-charge window runs from 1,995 fps to 3,258 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 182.0 gr projectile in 0.311" calls for a 1:12.5 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, Vihtavuori N570, Alliant Reloder-33 rank at the top here: for .30-378 Weath. Mag. with the .311 | 182gr | Prvi Partizan FMJ BT they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Hodgdon US 869, Lovex D100, 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.