Load Specifications
Load data in caliber .30-378 Weath. Mag. with .308 | 200gr | Rhino Solid Shank bullet and 42 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 IMR 8133 Enduron.
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% | 57,377 psi | 90% | 2913 fps | 100% |
| Accurate 8700ᴾ | <<locked>> | 100% | 53,432 psi | 84% | 2969 fps | 98.6% |
| Accurate MAGPRO | <<locked>> | 82% | 56,681 psi | 89% | 3035 fps | 99.9% |
| ADI AR 2213 | <<locked>> | 84% | 57,101 psi | 89% | 3025 fps | 100% |
| ADI AR 2217 | <<locked>> | 92% | 56,927 psi | 89% | 3015 fps | 100% |
| ADI AR 2218 | <<locked>> | 96% | 57,595 psi | 90% | 3159 fps | 99.7% |
| ADI AR 2225 | <<locked>> | 94% | 56,724 psi | 89% | 3038 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 84% | 57,682 psi | 90% | 3018 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 84% | 56,159 psi | 88% | 2917 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 88% | 57,101 psi | 89% | 3002 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 92% | 55,477 psi | 87% | 3058 fps | 99.2% |
| Alliant Reloder-50 | <<locked>> | 96% | 55,796 psi | 87% | 3058 fps | 98.9% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 57,101 psi | 89% | 2989 fps | 99.4% |
| Bofors RP15 | <<locked>> | 86% | 57,217 psi | 90% | 3012 fps | 100% |
| Bofors RP30 | <<locked>> | 90% | 56,811 psi | 89% | 3025 fps | 100% |
| Bofors RP5 | <<locked>> | 84% | 57,682 psi | 90% | 3018 fps | 100% |
| Hodgdon H1000 | <<locked>> | 88% | 54,302 psi | 85% | 2972 fps | 100% |
| Hodgdon H4831 | <<locked>> | 82% | 55,651 psi | 87% | 2953 fps | 100% |
| Hodgdon H4831 SC | <<locked>> | 82% | 54,679 psi | 86% | 2940 fps | 99.9% |
| Hodgdon Retumbo | <<locked>> | 88% | 56,855 psi | 89% | 3097 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 38,087 psi | 60% | 1913 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 55,680 psi | 87% | 2930 fps | 100% |
| IMR 7828 SSC | <<locked>> | 84% | 55,825 psi | 87% | 3012 fps | 100% |
| IMR 7977 Enduron | <<locked>> | 88% | 54,375 psi | 85% | 2884 fps | 96.5% |
| IMR 8133 Enduron | <<locked>> | 96% | 55,622 psi | 87% | 3025 fps | 100% |
| Lovex S071 | <<locked>> | 88% | 55,912 psi | 88% | 2894 fps | 100% |
| Norma 217 | <<locked>> | 96% | 57,217 psi | 90% | 3045 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 57,435 psi | 90% | 3038 fps | 100% |
| Ramshot Magnum | <<locked>> | 86% | 55,796 psi | 87% | 2959 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 39,117 psi | 61% | 1959 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 57,696 psi | 90% | 3084 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 90% | 56,695 psi | 89% | 3061 fps | 100% |
| SNPE Vectan SP 13ᴾ | <<locked>> | 100% | 55,216 psi | 87% | 2979 fps | 98.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 57,392 psi | 90% | 2979 fps | 100% |
| Vihtavuori N165 | <<locked>> | 84% | 54,389 psi | 85% | 2884 fps | 100% |
| Vihtavuori N170 | <<locked>> | 90% | 57,493 psi | 90% | 2982 fps | 98.4% |
| Vihtavuori N560 | <<locked>> | 82% | 57,261 psi | 90% | 3041 fps | 100% |
| Vihtavuori N565 | <<locked>> | 86% | 55,027 psi | 86% | 2982 fps | 100% |
| Vihtavuori N568 | <<locked>> | 90% | 57,072 psi | 89% | 3064 fps | 99.9% |
| Vihtavuori N570 | <<locked>> | 90% | 54,636 psi | 86% | 3064 fps | 98.8% |
| Winchester StaBALL HD | <<locked>> | 84% | 57,595 psi | 90% | 3015 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 82% | 53,969 psi | 85% | 2894 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% | 50,256 psi | 79% | 2805 fps | 100% |
| Accurate 8700 | <<locked>> | 94% | 42,815 psi | 67% | 2772 fps | 96% |
| Accurate MAGPRO | <<locked>> | 80% | 52,823 psi | 83% | 2969 fps | 99.7% |
| ADI AR 2213 | <<locked>> | 80% | 49,763 psi | 78% | 2904 fps | 99.8% |
| ADI AR 2217 | <<locked>> | 80% | 37,405 psi | 59% | 2651 fps | 98.3% |
| ADI AR 2218 | 102.5 gr | 86% | 39,697 psi | 62% | 2789 fps | 95.4% |
| ADI AR 2225 | <<locked>> | 80% | 34,650 psi | 54% | 2625 fps | 99.6% |
| Alliant Reloder-22 | <<locked>> | 80% | 50,488 psi | 79% | 2900 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 80% | 49,269 psi | 77% | 2815 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 43,497 psi | 68% | 2779 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 84% | 41,263 psi | 65% | 2782 fps | 96% |
| Alliant Reloder-50 | <<locked>> | 88% | 41,510 psi | 65% | 2779 fps | 95.5% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 46,978 psi | 74% | 2808 fps | 97.9% |
| Bofors RP15 | <<locked>> | 80% | 47,108 psi | 74% | 2838 fps | 99.9% |
| Bofors RP30 | <<locked>> | 80% | 40,538 psi | 64% | 2730 fps | 98.9% |
| Bofors RP5 | <<locked>> | 80% | 50,488 psi | 79% | 2900 fps | 100% |
| Hodgdon H1000 | <<locked>> | 80% | 40,698 psi | 64% | 2726 fps | 99.4% |
| Hodgdon H4831 | <<locked>> | 80% | 51,982 psi | 81% | 2894 fps | 99.8% |
| Hodgdon H4831 SC | <<locked>> | 80% | 51,082 psi | 80% | 2877 fps | 99.7% |
| Hodgdon Retumbo | <<locked>> | 80% | 42,612 psi | 67% | 2848 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,689 psi | 45% | 1713 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 52,330 psi | 82% | 2874 fps | 99.8% |
| IMR 7828 SSC | <<locked>> | 80% | 48,588 psi | 76% | 2887 fps | 99.8% |
| IMR 7977 Enduron | <<locked>> | 86% | 50,981 psi | 80% | 2825 fps | 95.7% |
| IMR 8133 Enduron | 87.6 gr | 80% | 32,300 psi | 51% | 2543 fps | 96.2% |
| Lovex S071 | <<locked>> | 80% | 43,526 psi | 68% | 2690 fps | 100% |
| Norma 217 | <<locked>> | 80% | 32,866 psi | 52% | 2572 fps | 98.5% |
| Ramshot Grand | <<locked>> | 80% | 49,647 psi | 78% | 2910 fps | 99.9% |
| Ramshot Magnum | <<locked>> | 80% | 44,701 psi | 70% | 2779 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,544 psi | 46% | 1755 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 42,424 psi | 66% | 2828 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 80% | 38,928 psi | 61% | 2717 fps | 97.3% |
| SNPE Vectan SP 13 | <<locked>> | 92% | 41,930 psi | 66% | 2730 fps | 95.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 53,737 psi | 84% | 2927 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 47,688 psi | 75% | 2776 fps | 100% |
| Vihtavuori N170 | <<locked>> | 82% | 44,019 psi | 69% | 2740 fps | 95.4% |
| Vihtavuori N560 | <<locked>> | 80% | 53,374 psi | 84% | 2976 fps | 99.9% |
| Vihtavuori N565 | <<locked>> | 80% | 44,947 psi | 70% | 2802 fps | 99.2% |
| Vihtavuori N568 | <<locked>> | 80% | 39,943 psi | 63% | 2736 fps | 97.1% |
| Vihtavuori N570 | 95.8 gr | 82% | 41,017 psi | 64% | 2792 fps | 95.4% |
| Winchester StaBALL HD | <<locked>> | 80% | 49,690 psi | 78% | 2900 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 50,386 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 42 powders for .30-378 Weath. Mag. loaded with the .308 | 200gr | Rhino Solid Shank. ADI AR 2218 delivers the highest muzzle velocity at 3,159 fps; across all powders the maximum-charge window runs from 1,913 fps to 3,159 fps. Accurate 8700 gives the best case fill at 100 %, and 42 of the 42 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 0.308" 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, IMR 8133 Enduron rank at the top here: for .30-378 Weath. Mag. with the .308 | 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.