Load Specifications
Load data in caliber .30-378 Weath. Mag. with .308 | 206gr | Peregrine VRG-2 bullet and 50 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.
A valid access license is required to use the Personalized Load Calculator.
You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 84% | 56,797 psi | 89% | 2871 fps | 100% |
| Accurate 8700ᴾ | <<locked>> | 100% | 52,968 psi | 83% | 2933 fps | 98.7% |
| Accurate MAGPRO | <<locked>> | 82% | 56,202 psi | 88% | 2992 fps | 100% |
| ADI AR 2213 | <<locked>> | 84% | 56,913 psi | 89% | 2986 fps | 100% |
| ADI AR 2217 | <<locked>> | 92% | 56,637 psi | 89% | 2976 fps | 100% |
| ADI AR 2218 | <<locked>> | 96% | 57,276 psi | 90% | 3120 fps | 99.8% |
| ADI AR 2225 | <<locked>> | 94% | 56,434 psi | 88% | 2999 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 57,334 psi | 90% | 2949 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 84% | 57,348 psi | 90% | 2979 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 84% | 55,593 psi | 87% | 2874 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 88% | 56,681 psi | 89% | 2959 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 92% | 54,955 psi | 86% | 3018 fps | 99.3% |
| Alliant Reloder-50 | <<locked>> | 96% | 54,969 psi | 86% | 3012 fps | 99% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 56,942 psi | 89% | 2949 fps | 99.5% |
| Bofors RP15 | <<locked>> | 86% | 56,884 psi | 89% | 2972 fps | 100% |
| Bofors RP30 | <<locked>> | 90% | 56,333 psi | 88% | 2986 fps | 100% |
| Bofors RP5 | <<locked>> | 84% | 57,348 psi | 90% | 2979 fps | 100% |
| Hodgdon H1000 | <<locked>> | 88% | 53,969 psi | 85% | 2933 fps | 100% |
| Hodgdon H4831 | <<locked>> | 82% | 55,245 psi | 87% | 2913 fps | 100% |
| Hodgdon H4831 SC | <<locked>> | 82% | 54,273 psi | 85% | 2900 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 88% | 56,521 psi | 89% | 3058 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 38,101 psi | 60% | 1886 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 55,463 psi | 87% | 2894 fps | 100% |
| IMR 7828 SSC | <<locked>> | 84% | 55,579 psi | 87% | 2972 fps | 100% |
| IMR 7977 Enduron | <<locked>> | 88% | 54,186 psi | 85% | 2851 fps | 96.7% |
| IMR 8133 Enduron | <<locked>> | 96% | 55,129 psi | 86% | 2982 fps | 100% |
| Lovex D100 | <<locked>> | 92% | 54,969 psi | 86% | 2900 fps | 95.9% |
| Lovex S071 | <<locked>> | 88% | 55,259 psi | 87% | 2851 fps | 100% |
| Norma 217 | <<locked>> | 96% | 56,695 psi | 89% | 3002 fps | 100% |
| Norma MRP | <<locked>> | 82% | 57,537 psi | 90% | 2989 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 57,043 psi | 89% | 2995 fps | 100% |
| Ramshot LRT | <<locked>> | 96% | 56,623 psi | 89% | 3038 fps | 96% |
| Ramshot Magnum | <<locked>> | 86% | 55,347 psi | 87% | 2920 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 39,117 psi | 61% | 1929 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 57,363 psi | 90% | 3041 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 90% | 56,072 psi | 88% | 3015 fps | 100% |
| Rottweil R 905 | <<locked>> | 82% | 57,406 psi | 90% | 2943 fps | 100% |
| Shooters World 50 BMG | <<locked>> | 92% | 54,969 psi | 86% | 2900 fps | 95.9% |
| SNPE Vectan SP 13ᴾ | <<locked>> | 100% | 54,665 psi | 86% | 2940 fps | 98.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 57,058 psi | 89% | 2943 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 57,334 psi | 90% | 2907 fps | 100% |
| Vihtavuori N165 | <<locked>> | 86% | 57,711 psi | 90% | 2900 fps | 100% |
| Vihtavuori N170 | <<locked>> | 90% | 57,029 psi | 89% | 2946 fps | 98.6% |
| Vihtavuori N555 | <<locked>> | 82% | 57,217 psi | 90% | 2900 fps | 100% |
| Vihtavuori N560 | <<locked>> | 82% | 56,826 psi | 89% | 3002 fps | 100% |
| Vihtavuori N565 | <<locked>> | 86% | 54,404 psi | 85% | 2940 fps | 100% |
| Vihtavuori N568 | <<locked>> | 90% | 56,463 psi | 88% | 3018 fps | 99.9% |
| Vihtavuori N570 | <<locked>> | 90% | 54,201 psi | 85% | 3025 fps | 99% |
| Winchester StaBALL HD | <<locked>> | 84% | 56,971 psi | 89% | 2969 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 84% | 57,334 psi | 90% | 2910 fps | 100% |
Start Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 80% | 49,516 psi | 78% | 2762 fps | 100% |
| Accurate 8700 | <<locked>> | 92% | 39,189 psi | 61% | 2667 fps | 95% |
| Accurate MAGPRO | <<locked>> | 80% | 52,272 psi | 82% | 2930 fps | 99.8% |
| ADI AR 2213 | <<locked>> | 80% | 49,443 psi | 77% | 2864 fps | 99.9% |
| ADI AR 2217 | <<locked>> | 80% | 36,898 psi | 58% | 2612 fps | 98.4% |
| ADI AR 2218 | <<locked>> | 86% | 39,189 psi | 61% | 2749 fps | 95.6% |
| ADI AR 2225 | <<locked>> | 80% | 34,084 psi | 53% | 2582 fps | 99.6% |
| Alliant Reloder-19 | <<locked>> | 80% | 53,751 psi | 84% | 2894 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 80% | 50,082 psi | 78% | 2861 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 80% | 48,776 psi | 76% | 2772 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 42,902 psi | 67% | 2736 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 84% | 40,625 psi | 64% | 2740 fps | 96.1% |
| Alliant Reloder-50 | <<locked>> | 88% | 40,669 psi | 64% | 2733 fps | 95.5% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 46,775 psi | 73% | 2776 fps | 98.1% |
| Bofors RP15 | <<locked>> | 80% | 46,644 psi | 73% | 2799 fps | 100% |
| Bofors RP30 | <<locked>> | 80% | 39,914 psi | 63% | 2684 fps | 99% |
| Bofors RP5 | <<locked>> | 80% | 50,082 psi | 78% | 2861 fps | 100% |
| Hodgdon H1000 | <<locked>> | 80% | 40,277 psi | 63% | 2687 fps | 99.4% |
| Hodgdon H4831 | <<locked>> | 80% | 51,706 psi | 81% | 2858 fps | 99.8% |
| Hodgdon H4831 SC | <<locked>> | 80% | 50,763 psi | 80% | 2841 fps | 99.8% |
| Hodgdon Retumbo | <<locked>> | 80% | 42,192 psi | 66% | 2808 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,631 psi | 45% | 1686 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 51,895 psi | 81% | 2835 fps | 99.9% |
| IMR 7828 SSC | <<locked>> | 80% | 48,254 psi | 76% | 2851 fps | 99.8% |
| IMR 7977 Enduron | <<locked>> | 84% | 47,558 psi | 75% | 2733 fps | 95.1% |
| IMR 8133 Enduron | <<locked>> | 80% | 31,604 psi | 50% | 2497 fps | 96.2% |
| Lovex D100 | <<locked>> | 90% | 51,300 psi | 80% | 2838 fps | 95% |
| Lovex S071 | <<locked>> | 80% | 42,656 psi | 67% | 2644 fps | 100% |
| Norma 217 | <<locked>> | 80% | 32,126 psi | 50% | 2523 fps | 98.4% |
| Norma MRP | <<locked>> | 80% | 53,635 psi | 84% | 2930 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 49,124 psi | 77% | 2867 fps | 100% |
| Ramshot LRT | <<locked>> | 94% | 52,750 psi | 83% | 2972 fps | 95% |
| Ramshot Magnum | <<locked>> | 80% | 44,193 psi | 69% | 2736 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,341 psi | 46% | 1726 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 41,843 psi | 66% | 2782 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 80% | 38,319 psi | 60% | 2677 fps | 97.4% |
| Rottweil R 905 | <<locked>> | 80% | 53,534 psi | 84% | 2887 fps | 100% |
| Shooters World 50 BMG | <<locked>> | 90% | 51,300 psi | 80% | 2838 fps | 95% |
| SNPE Vectan SP 13 | <<locked>> | 92% | 41,307 psi | 65% | 2690 fps | 95.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 53,185 psi | 83% | 2884 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 53,737 psi | 84% | 2854 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 47,239 psi | 74% | 2740 fps | 100% |
| Vihtavuori N170 | <<locked>> | 82% | 43,337 psi | 68% | 2697 fps | 95.5% |
| Vihtavuori N555 | <<locked>> | 80% | 53,577 psi | 84% | 2848 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 53,026 psi | 83% | 2940 fps | 99.9% |
| Vihtavuori N565 | <<locked>> | 80% | 44,179 psi | 69% | 2756 fps | 99.2% |
| Vihtavuori N568 | <<locked>> | 80% | 39,378 psi | 62% | 2694 fps | 97.2% |
| Vihtavuori N570 | <<locked>> | 82% | 40,379 psi | 63% | 2749 fps | 95.5% |
| Winchester StaBALL HD | <<locked>> | 80% | 49,008 psi | 77% | 2854 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 49,966 psi | 78% | 2795 fps | 100% |
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 54 powders for .30-378 Weath. Mag. loaded with the .308 | 206gr | Peregrine VRG-2. ADI AR 2218 delivers the highest muzzle velocity at 3,120 fps; across all powders the maximum-charge window runs from 1,886 fps to 3,120 fps. Accurate 8700 gives the best case fill at 100 %, and 54 of the 54 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 206.0 gr projectile in 0.308" calls for a 1:12.5 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.