Load Specifications
Load data in caliber .30-378 Weath. Mag. with .310 | 200gr | Rhino Solid Shank bullet and 45 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>> | 84% | 57,261 psi | 90% | 2910 fps | 100% |
| Accurate 8700ᴾ | <<locked>> | 100% | 53,171 psi | 83% | 2966 fps | 98.5% |
| Accurate MAGPRO | <<locked>> | 82% | 56,579 psi | 89% | 3031 fps | 99.9% |
| ADI AR 2213 | <<locked>> | 84% | 56,985 psi | 89% | 3022 fps | 100% |
| ADI AR 2217 | <<locked>> | 92% | 56,652 psi | 89% | 3012 fps | 100% |
| ADI AR 2218 | <<locked>> | 96% | 57,348 psi | 90% | 3153 fps | 99.7% |
| ADI AR 2225 | <<locked>> | 94% | 56,623 psi | 89% | 3038 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 57,667 psi | 90% | 2989 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 84% | 57,522 psi | 90% | 3015 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 84% | 56,028 psi | 88% | 2917 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 88% | 56,971 psi | 89% | 2999 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 92% | 55,405 psi | 87% | 3058 fps | 99.2% |
| Alliant Reloder-50 | <<locked>> | 96% | 55,680 psi | 87% | 3054 fps | 98.9% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 57,029 psi | 89% | 2986 fps | 99.4% |
| Bofors RP15 | <<locked>> | 86% | 57,101 psi | 89% | 3009 fps | 100% |
| Bofors RP30 | <<locked>> | 90% | 56,724 psi | 89% | 3025 fps | 100% |
| Bofors RP5 | <<locked>> | 84% | 57,522 psi | 90% | 3015 fps | 100% |
| Hodgdon H1000 | <<locked>> | 88% | 54,027 psi | 85% | 2966 fps | 100% |
| Hodgdon H4831 | <<locked>> | 82% | 55,550 psi | 87% | 2953 fps | 100% |
| Hodgdon H4831 SC | <<locked>> | 82% | 54,578 psi | 86% | 2936 fps | 99.9% |
| Hodgdon Retumbo | <<locked>> | 88% | 56,739 psi | 89% | 3094 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 38,058 psi | 60% | 1913 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 55,579 psi | 87% | 2927 fps | 100% |
| IMR 7828 SSC | <<locked>> | 84% | 55,695 psi | 87% | 3009 fps | 100% |
| IMR 7977 Enduron | <<locked>> | 88% | 54,244 psi | 85% | 2884 fps | 96.4% |
| IMR 8133 Enduron | <<locked>> | 96% | 55,535 psi | 87% | 3025 fps | 100% |
| Lovex S071 | <<locked>> | 88% | 55,767 psi | 87% | 2890 fps | 100% |
| Norma 217 | <<locked>> | 96% | 57,130 psi | 90% | 3045 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 57,305 psi | 90% | 3035 fps | 100% |
| Ramshot Magnum | <<locked>> | 86% | 55,709 psi | 87% | 2956 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 39,218 psi | 61% | 1959 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 57,580 psi | 90% | 3081 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 90% | 56,449 psi | 88% | 3054 fps | 100% |
| Rottweil R 905 | <<locked>> | 82% | 57,624 psi | 90% | 2982 fps | 100% |
| SNPE Vectan SP 13ᴾ | <<locked>> | 100% | 54,984 psi | 86% | 2976 fps | 98.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 57,261 psi | 90% | 2979 fps | 100% |
| Vihtavuori N165 | <<locked>> | 84% | 54,288 psi | 85% | 2884 fps | 100% |
| Vihtavuori N170 | <<locked>> | 90% | 57,406 psi | 90% | 2982 fps | 98.4% |
| Vihtavuori N555 | <<locked>> | 82% | 57,653 psi | 90% | 2943 fps | 100% |
| Vihtavuori N560 | <<locked>> | 82% | 57,159 psi | 90% | 3041 fps | 100% |
| Vihtavuori N565 | <<locked>> | 86% | 54,926 psi | 86% | 2982 fps | 100% |
| Vihtavuori N568 | <<locked>> | 90% | 56,797 psi | 89% | 3058 fps | 99.9% |
| Vihtavuori N570 | <<locked>> | 90% | 54,505 psi | 85% | 3064 fps | 98.8% |
| Winchester StaBALL HD | <<locked>> | 84% | 57,392 psi | 90% | 3012 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 84% | 57,682 psi | 90% | 2949 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% | 50,270 psi | 79% | 2808 fps | 100% |
| Accurate 8700 | <<locked>> | 94% | 42,743 psi | 67% | 2772 fps | 96% |
| Accurate MAGPRO | <<locked>> | 80% | 52,707 psi | 83% | 2969 fps | 99.7% |
| ADI AR 2213 | <<locked>> | 80% | 49,632 psi | 78% | 2900 fps | 99.8% |
| ADI AR 2217 | <<locked>> | 80% | 37,289 psi | 58% | 2651 fps | 98.2% |
| ADI AR 2218 | 102.3 gr | 86% | 39,610 psi | 62% | 2785 fps | 95.4% |
| ADI AR 2225 | <<locked>> | 80% | 34,548 psi | 54% | 2621 fps | 99.6% |
| Alliant Reloder-19 | <<locked>> | 80% | 54,099 psi | 85% | 2933 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 80% | 50,372 psi | 79% | 2897 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 80% | 49,139 psi | 77% | 2812 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 43,381 psi | 68% | 2776 fps | 100% |
| Alliant Reloder-33 | 101.8 gr | 84% | 41,133 psi | 64% | 2779 fps | 95.9% |
| Alliant Reloder-50 | <<locked>> | 88% | 41,423 psi | 65% | 2779 fps | 95.4% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 46,891 psi | 73% | 2805 fps | 97.9% |
| Bofors RP15 | <<locked>> | 80% | 46,978 psi | 74% | 2838 fps | 99.9% |
| Bofors RP30 | <<locked>> | 80% | 40,553 psi | 64% | 2726 fps | 98.9% |
| Bofors RP5 | <<locked>> | 80% | 50,372 psi | 79% | 2897 fps | 100% |
| Hodgdon H1000 | <<locked>> | 80% | 40,582 psi | 64% | 2723 fps | 99.3% |
| Hodgdon H4831 | <<locked>> | 80% | 51,866 psi | 81% | 2890 fps | 99.8% |
| Hodgdon H4831 SC | <<locked>> | 80% | 50,981 psi | 80% | 2877 fps | 99.7% |
| Hodgdon Retumbo | <<locked>> | 80% | 42,482 psi | 67% | 2848 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,645 psi | 45% | 1713 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 52,228 psi | 82% | 2871 fps | 99.8% |
| IMR 7828 SSC | <<locked>> | 80% | 48,486 psi | 76% | 2884 fps | 99.8% |
| IMR 7977 Enduron | <<locked>> | 86% | 50,908 psi | 80% | 2825 fps | 95.7% |
| IMR 8133 Enduron | <<locked>> | 80% | 32,213 psi | 50% | 2543 fps | 96.2% |
| Lovex S071 | <<locked>> | 80% | 43,395 psi | 68% | 2687 fps | 100% |
| Norma 217 | <<locked>> | 80% | 32,750 psi | 51% | 2569 fps | 98.4% |
| Ramshot Grand | <<locked>> | 80% | 49,516 psi | 78% | 2910 fps | 99.9% |
| Ramshot Magnum | <<locked>> | 80% | 44,599 psi | 70% | 2776 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,501 psi | 46% | 1752 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 42,308 psi | 66% | 2825 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 80% | 38,841 psi | 61% | 2717 fps | 97.3% |
| Rottweil R 905 | <<locked>> | 80% | 53,954 psi | 85% | 2927 fps | 100% |
| SNPE Vectan SP 13 | <<locked>> | 92% | 41,872 psi | 66% | 2730 fps | 95.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 53,635 psi | 84% | 2923 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 47,718 psi | 75% | 2776 fps | 100% |
| Vihtavuori N170 | <<locked>> | 82% | 43,918 psi | 69% | 2736 fps | 95.3% |
| Vihtavuori N555 | <<locked>> | 80% | 54,070 psi | 85% | 2890 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 53,258 psi | 83% | 2976 fps | 99.9% |
| Vihtavuori N565 | <<locked>> | 80% | 44,831 psi | 70% | 2799 fps | 99.2% |
| Vihtavuori N568 | <<locked>> | 80% | 39,813 psi | 62% | 2733 fps | 97% |
| Vihtavuori N570 | 95.6 gr | 82% | 40,915 psi | 64% | 2789 fps | 95.4% |
| Winchester StaBALL HD | <<locked>> | 80% | 49,516 psi | 78% | 2897 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 50,285 psi | 79% | 2835 fps | 100% |
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 45 powders for .30-378 Weath. Mag. loaded with the .310 | 200gr | Rhino Solid Shank. ADI AR 2218 delivers the highest muzzle velocity at 3,153 fps; across all powders the maximum-charge window runs from 1,913 fps to 3,153 fps. Accurate 8700 gives the best case fill at 100 %, and 45 of the 45 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 200.0 gr projectile in 0.31" calls for a 1:13.0 twist; slower twists will usually not stabilise this weight. Accurate 8700, Hodgdon TrailBoss, ReloadSwiss RS 14 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 .310 | 200gr | Rhino Solid Shank 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.