Load Specifications
Load data in caliber .30-378 Weath. Mag. with .308 | 200gr | Norma ORYX bullet and 41 powders. The key underlying parameters are shown in the table above.
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>> | 82% | 54,157 psi | 85% | 2867 fps | 100% |
| Accurate 8700ᴾ | <<locked>> | 100% | 54,027 psi | 85% | 2979 fps | 98.7% |
| Accurate MAGPRO | <<locked>> | 82% | 57,087 psi | 89% | 3041 fps | 99.9% |
| ADI AR 2213 | <<locked>> | 84% | 57,682 psi | 90% | 3035 fps | 100% |
| ADI AR 2217 | <<locked>> | 92% | 57,464 psi | 90% | 3022 fps | 100% |
| ADI AR 2218 | <<locked>> | 94% | 54,012 psi | 85% | 3094 fps | 99.3% |
| ADI AR 2225 | <<locked>> | 94% | 57,261 psi | 90% | 3045 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 82% | 54,433 psi | 85% | 2966 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 84% | 56,565 psi | 89% | 2923 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 88% | 57,493 psi | 90% | 3005 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 92% | 56,144 psi | 88% | 3071 fps | 99.3% |
| Alliant Reloder-50 | <<locked>> | 96% | 56,405 psi | 88% | 3068 fps | 99% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 57,522 psi | 90% | 2995 fps | 99.5% |
| Bofors RP15 | <<locked>> | 84% | 54,041 psi | 85% | 2959 fps | 100% |
| Bofors RP30 | <<locked>> | 90% | 57,363 psi | 90% | 3035 fps | 100% |
| Bofors RP5 | <<locked>> | 82% | 54,433 psi | 85% | 2966 fps | 100% |
| Hodgdon H1000 | <<locked>> | 88% | 54,868 psi | 86% | 2982 fps | 100% |
| Hodgdon H4831 | <<locked>> | 82% | 56,043 psi | 88% | 2959 fps | 100% |
| Hodgdon H4831 SC | <<locked>> | 82% | 55,071 psi | 86% | 2946 fps | 99.9% |
| Hodgdon Retumbo | <<locked>> | 88% | 57,508 psi | 90% | 3107 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 38,116 psi | 60% | 1916 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 56,057 psi | 88% | 2933 fps | 100% |
| IMR 7828 SSC | <<locked>> | 84% | 56,405 psi | 88% | 3022 fps | 100% |
| IMR 7977 Enduron | <<locked>> | 88% | 54,781 psi | 86% | 2894 fps | 96.6% |
| IMR 8133 Enduron | <<locked>> | 96% | 56,318 psi | 88% | 3035 fps | 100% |
| Lovex S071 | <<locked>> | 88% | 56,449 psi | 88% | 2900 fps | 100% |
| Norma 217 | <<locked>> | 94% | 54,041 psi | 85% | 2999 fps | 100% |
| Ramshot Grand | <<locked>> | 82% | 53,853 psi | 84% | 2982 fps | 100% |
| Ramshot Magnum | <<locked>> | 86% | 56,333 psi | 88% | 2966 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 39,276 psi | 62% | 1962 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 86% | 54,041 psi | 85% | 3028 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 90% | 57,232 psi | 90% | 3064 fps | 100% |
| SNPE Vectan SP 13ᴾ | <<locked>> | 100% | 55,782 psi | 87% | 2989 fps | 98.6% |
| Vihtavuori N165 | <<locked>> | 84% | 54,897 psi | 86% | 2894 fps | 100% |
| Vihtavuori N170 | <<locked>> | 88% | 54,273 psi | 85% | 2930 fps | 97.9% |
| Vihtavuori N560 | <<locked>> | 82% | 57,638 psi | 90% | 3048 fps | 100% |
| Vihtavuori N565 | <<locked>> | 86% | 55,564 psi | 87% | 2992 fps | 100% |
| Vihtavuori N568 | <<locked>> | 90% | 57,566 psi | 90% | 3068 fps | 99.9% |
| Vihtavuori N570 | <<locked>> | 90% | 55,303 psi | 87% | 3077 fps | 99% |
| Winchester StaBALL HD | <<locked>> | 82% | 53,969 psi | 85% | 2963 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 82% | 54,317 psi | 85% | 2900 fps | 100% |
Start Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 80% | 50,778 psi | 80% | 2815 fps | 100% |
| Accurate 8700 | <<locked>> | 92% | 40,263 psi | 63% | 2720 fps | 95.1% |
| Accurate MAGPRO | <<locked>> | 80% | 53,229 psi | 83% | 2976 fps | 99.7% |
| ADI AR 2213 | <<locked>> | 80% | 50,169 psi | 79% | 2910 fps | 99.9% |
| ADI AR 2217 | <<locked>> | 80% | 37,753 psi | 59% | 2661 fps | 98.4% |
| ADI AR 2218 | <<locked>> | 86% | 40,205 psi | 63% | 2802 fps | 95.7% |
| ADI AR 2225 | <<locked>> | 80% | 34,998 psi | 55% | 2631 fps | 99.7% |
| Alliant Reloder-22 | <<locked>> | 80% | 50,894 psi | 80% | 2907 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 80% | 49,705 psi | 78% | 2822 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 43,903 psi | 69% | 2785 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 82% | 38,769 psi | 61% | 2723 fps | 95.1% |
| Alliant Reloder-50 | <<locked>> | 88% | 42,076 psi | 66% | 2792 fps | 95.7% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 47,413 psi | 74% | 2818 fps | 98% |
| Bofors RP15 | <<locked>> | 80% | 47,500 psi | 74% | 2848 fps | 100% |
| Bofors RP30 | <<locked>> | 80% | 41,046 psi | 64% | 2736 fps | 99% |
| Bofors RP5 | <<locked>> | 80% | 50,894 psi | 80% | 2907 fps | 100% |
| Hodgdon H1000 | <<locked>> | 80% | 41,046 psi | 64% | 2733 fps | 99.4% |
| Hodgdon H4831 | <<locked>> | 80% | 52,373 psi | 82% | 2900 fps | 99.8% |
| Hodgdon H4831 SC | <<locked>> | 80% | 51,445 psi | 81% | 2884 fps | 99.8% |
| Hodgdon Retumbo | <<locked>> | 80% | 43,047 psi | 67% | 2858 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,674 psi | 45% | 1716 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 52,678 psi | 83% | 2881 fps | 99.9% |
| IMR 7828 SSC | <<locked>> | 80% | 49,023 psi | 77% | 2897 fps | 99.8% |
| IMR 7977 Enduron | <<locked>> | 86% | 51,430 psi | 81% | 2835 fps | 95.8% |
| IMR 8133 Enduron | <<locked>> | 80% | 32,648 psi | 51% | 2552 fps | 96.4% |
| Lovex S071 | <<locked>> | 80% | 43,772 psi | 69% | 2694 fps | 100% |
| Norma 217 | <<locked>> | 80% | 33,257 psi | 52% | 2582 fps | 98.6% |
| Ramshot Grand | <<locked>> | 80% | 50,053 psi | 78% | 2920 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 45,208 psi | 71% | 2789 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,515 psi | 46% | 1755 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 42,844 psi | 67% | 2835 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 80% | 39,407 psi | 62% | 2730 fps | 97.5% |
| SNPE Vectan SP 13 | <<locked>> | 92% | 42,322 psi | 66% | 2740 fps | 95.4% |
| Vihtavuori N165 | <<locked>> | 80% | 48,196 psi | 76% | 2785 fps | 100% |
| Vihtavuori N170 | <<locked>> | 82% | 44,324 psi | 69% | 2746 fps | 95.5% |
| Vihtavuori N560 | <<locked>> | 80% | 53,911 psi | 84% | 2986 fps | 99.9% |
| Vihtavuori N565 | <<locked>> | 80% | 45,310 psi | 71% | 2808 fps | 99.3% |
| Vihtavuori N568 | <<locked>> | 80% | 40,408 psi | 63% | 2746 fps | 97.3% |
| Vihtavuori N570 | <<locked>> | 82% | 41,408 psi | 65% | 2799 fps | 95.6% |
| Winchester StaBALL HD | <<locked>> | 80% | 50,198 psi | 79% | 2907 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 50,734 psi | 80% | 2841 fps | 100% |
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 48 powders for .30-378 Weath. Mag. loaded with the .308 | 200gr | Norma ORYX. Hodgdon Retumbo delivers the highest muzzle velocity at 3,107 fps; across all powders the maximum-charge window runs from 1,916 fps to 3,107 fps. Accurate 8700 gives the best case fill at 100 %, and 48 of the 48 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 1:14.0 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. As outliers, Hodgdon 50BMG 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.