Load Specifications
Load data in caliber .30-378 Weath. Mag. with .307 | 200gr | Frontier PH HPBT 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, Hodgdon Retumbo and Vihtavuori N570.
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% | 55,970 psi | 88% | 2894 fps | 100% |
| Accurate 8700ᴾ | <<locked>> | 100% | 51,459 psi | 81% | 2943 fps | 98.1% |
| Accurate MAGPRO | <<locked>> | 82% | 54,984 psi | 86% | 3009 fps | 99.8% |
| ADI AR 2209 | <<locked>> | 82% | 56,710 psi | 89% | 2979 fps | 100% |
| ADI AR 2213 | <<locked>> | 84% | 55,637 psi | 87% | 3002 fps | 100% |
| ADI AR 2217 | <<locked>> | 92% | 55,013 psi | 86% | 2989 fps | 100% |
| ADI AR 2218 | <<locked>> | 96% | 55,463 psi | 87% | 3123 fps | 99.4% |
| ADI AR 2225 | <<locked>> | 94% | 54,621 psi | 86% | 3012 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 82% | 56,927 psi | 89% | 2976 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 56,362 psi | 88% | 2969 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 84% | 56,231 psi | 88% | 2995 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 84% | 54,621 psi | 86% | 2897 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 88% | 55,288 psi | 87% | 2976 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 94% | 57,682 psi | 90% | 3100 fps | 99.4% |
| Alliant Reloder-50 | <<locked>> | 98% | 57,653 psi | 90% | 3091 fps | 99.1% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 55,622 psi | 87% | 2963 fps | 99.2% |
| Bofors RP15 | <<locked>> | 86% | 55,622 psi | 87% | 2989 fps | 100% |
| Bofors RP30 | <<locked>> | 90% | 55,129 psi | 86% | 3002 fps | 100% |
| Bofors RP5 | <<locked>> | 84% | 56,231 psi | 88% | 2995 fps | 100% |
| Hodgdon H1000 | <<locked>> | 90% | 56,463 psi | 88% | 3005 fps | 100% |
| Hodgdon H4831 | <<locked>> | 82% | 54,157 psi | 85% | 2930 fps | 99.9% |
| Hodgdon H4831 SC | <<locked>> | 84% | 57,014 psi | 89% | 2976 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 88% | 55,013 psi | 86% | 3074 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 38,000 psi | 60% | 1903 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 54,433 psi | 85% | 2907 fps | 99.9% |
| IMR 7828 SSC | <<locked>> | 84% | 54,331 psi | 85% | 2989 fps | 100% |
| IMR 7977 Enduron | <<locked>> | 90% | 56,550 psi | 89% | 2917 fps | 96.8% |
| IMR 8133 Enduron | <<locked>> | 98% | 57,450 psi | 90% | 3058 fps | 100% |
| Lovex S071 | <<locked>> | 88% | 54,476 psi | 85% | 2871 fps | 100% |
| Norma 217 | <<locked>> | 96% | 55,274 psi | 87% | 3022 fps | 100% |
| Norma MRP | <<locked>> | 82% | 56,391 psi | 88% | 3009 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 55,695 psi | 87% | 3012 fps | 100% |
| Ramshot Magnum | <<locked>> | 86% | 54,114 psi | 85% | 2936 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 39,044 psi | 61% | 1949 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 55,506 psi | 87% | 3054 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 90% | 54,592 psi | 86% | 3028 fps | 99.9% |
| Rottweil R 904 | <<locked>> | 82% | 56,898 psi | 89% | 2946 fps | 100% |
| Rottweil R 905 | <<locked>> | 82% | 56,231 psi | 88% | 2963 fps | 100% |
| SNPE Vectan SP 13ᴾ | <<locked>> | 100% | 53,272 psi | 83% | 2949 fps | 98.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 55,869 psi | 88% | 2959 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 56,536 psi | 89% | 2930 fps | 100% |
| Vihtavuori N165 | <<locked>> | 86% | 56,666 psi | 89% | 2920 fps | 100% |
| Vihtavuori N170 | <<locked>> | 90% | 55,970 psi | 88% | 2959 fps | 98.1% |
| Vihtavuori N555 | <<locked>> | 82% | 56,188 psi | 88% | 2923 fps | 100% |
| Vihtavuori N560 | <<locked>> | 82% | 55,666 psi | 87% | 3018 fps | 100% |
| Vihtavuori N565 | <<locked>> | 88% | 57,000 psi | 89% | 3015 fps | 100% |
| Vihtavuori N568 | <<locked>> | 90% | 55,129 psi | 86% | 3035 fps | 99.8% |
| Vihtavuori N570 | <<locked>> | 92% | 56,724 psi | 89% | 3104 fps | 99.1% |
| Winchester StaBALL HD | <<locked>> | 84% | 55,564 psi | 87% | 2992 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 84% | 56,304 psi | 88% | 2930 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% | 48,950 psi | 77% | 2785 fps | 100% |
| Accurate 8700 | <<locked>> | 94% | 41,162 psi | 65% | 2743 fps | 95.3% |
| Accurate MAGPRO | <<locked>> | 80% | 51,285 psi | 80% | 2946 fps | 99.5% |
| ADI AR 2209 | <<locked>> | 80% | 53,011 psi | 83% | 2923 fps | 100% |
| ADI AR 2213 | <<locked>> | 80% | 48,443 psi | 76% | 2881 fps | 99.7% |
| ADI AR 2217 | <<locked>> | 80% | 36,245 psi | 57% | 2625 fps | 97.8% |
| ADI AR 2218 | 102.2 gr | 88% | 41,307 psi | 65% | 2831 fps | 96% |
| ADI AR 2225 | <<locked>> | 80% | 33,562 psi | 53% | 2602 fps | 99.4% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 53,272 psi | 83% | 2920 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 52,808 psi | 83% | 2913 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 80% | 49,197 psi | 77% | 2881 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 80% | 47,892 psi | 75% | 2795 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 42,018 psi | 66% | 2756 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 84% | 39,653 psi | 62% | 2753 fps | 95.3% |
| Alliant Reloder-50 | <<locked>> | 90% | 42,960 psi | 67% | 2815 fps | 95.9% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 45,905 psi | 72% | 2789 fps | 97.6% |
| Bofors RP15 | <<locked>> | 80% | 45,832 psi | 72% | 2818 fps | 99.8% |
| Bofors RP30 | <<locked>> | 80% | 39,305 psi | 62% | 2703 fps | 98.6% |
| Bofors RP5 | <<locked>> | 80% | 49,197 psi | 77% | 2881 fps | 100% |
| Hodgdon H1000 | <<locked>> | 80% | 39,479 psi | 62% | 2703 fps | 99.1% |
| Hodgdon H4831 | <<locked>> | 80% | 50,647 psi | 79% | 2871 fps | 99.6% |
| Hodgdon H4831 SC | <<locked>> | 80% | 49,879 psi | 78% | 2858 fps | 99.6% |
| Hodgdon Retumbo | 87.7 gr | 80% | 41,234 psi | 65% | 2825 fps | 99.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,616 psi | 45% | 1703 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 51,039 psi | 80% | 2851 fps | 99.7% |
| IMR 7828 SSC | <<locked>> | 80% | 47,239 psi | 74% | 2864 fps | 99.6% |
| IMR 7977 Enduron | <<locked>> | 86% | 49,748 psi | 78% | 2802 fps | 95.2% |
| IMR 8133 Enduron | <<locked>> | 80% | 31,154 psi | 49% | 2520 fps | 95.6% |
| Lovex S071 | <<locked>> | 80% | 42,337 psi | 66% | 2667 fps | 100% |
| Norma 217 | <<locked>> | 80% | 31,633 psi | 50% | 2546 fps | 98% |
| Norma MRP | <<locked>> | 80% | 52,533 psi | 82% | 2949 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 47,935 psi | 75% | 2881 fps | 99.8% |
| Ramshot Magnum | <<locked>> | 80% | 43,192 psi | 68% | 2753 fps | 99.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,486 psi | 46% | 1745 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 40,741 psi | 64% | 2799 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 80% | 37,550 psi | 59% | 2690 fps | 96.8% |
| Rottweil R 904 | <<locked>> | 80% | 53,447 psi | 84% | 2894 fps | 100% |
| Rottweil R 905 | <<locked>> | 80% | 52,591 psi | 82% | 2904 fps | 100% |
| SNPE Vectan SP 13 | <<locked>> | 94% | 43,366 psi | 68% | 2766 fps | 95.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 52,243 psi | 82% | 2900 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 52,982 psi | 83% | 2874 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 46,499 psi | 73% | 2756 fps | 100% |
| Vihtavuori N170 | <<locked>> | 84% | 45,803 psi | 72% | 2776 fps | 95.8% |
| Vihtavuori N555 | <<locked>> | 80% | 52,750 psi | 83% | 2874 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 51,924 psi | 81% | 2956 fps | 99.8% |
| Vihtavuori N565 | <<locked>> | 80% | 43,598 psi | 68% | 2776 fps | 98.9% |
| Vihtavuori N568 | <<locked>> | 80% | 38,624 psi | 61% | 2710 fps | 96.6% |
| Vihtavuori N570 | 95.6 gr | 84% | 42,583 psi | 67% | 2831 fps | 95.9% |
| Winchester StaBALL HD | <<locked>> | 80% | 47,892 psi | 75% | 2877 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 49,052 psi | 77% | 2815 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 50 powders for .30-378 Weath. Mag. loaded with the .307 | 200gr | Frontier PH HPBT. ADI AR 2218 delivers the highest muzzle velocity at 3,123 fps; across all powders the maximum-charge window runs from 1,903 fps to 3,123 fps. Accurate 8700 gives the best case fill at 100 %, and 50 of the 50 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 0.307" calls for a 1:10.0 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, Hodgdon Retumbo, Vihtavuori N570 rank at the top here: for .30-378 Weath. Mag. with the .307 | 200gr | Frontier PH HPBT 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.