Load Specifications
Load data in caliber .30-378 Weath. Mag. with .308 | 210gr | Berger LRBTHP bullet and 43 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-50.
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% | 54,476 psi | 85% | 2808 fps | 100% |
| Accurate 8700ᴾ | <<locked>> | 100% | 54,447 psi | 85% | 2930 fps | 99% |
| Accurate MAGPRO | <<locked>> | 82% | 57,508 psi | 90% | 2986 fps | 100% |
| ADI AR 2213 | <<locked>> | 82% | 54,143 psi | 85% | 2917 fps | 100% |
| ADI AR 2217 | <<locked>> | 90% | 54,027 psi | 85% | 2910 fps | 100% |
| ADI AR 2218 | <<locked>> | 94% | 54,259 psi | 85% | 3041 fps | 99.6% |
| ADI AR 2225 | <<locked>> | 92% | 53,940 psi | 85% | 2933 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 82% | 54,810 psi | 86% | 2907 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 84% | 56,927 psi | 89% | 2861 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 86% | 54,215 psi | 85% | 2894 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 92% | 56,565 psi | 89% | 3018 fps | 99.5% |
| Alliant Reloder-50 | <<locked>> | 96% | 56,826 psi | 89% | 3015 fps | 99.3% |
| Baschieri & Pellagri 109 | <<locked>> | 84% | 54,317 psi | 85% | 2884 fps | 99.4% |
| Bofors RP15 | <<locked>> | 84% | 54,404 psi | 85% | 2904 fps | 100% |
| Bofors RP30 | <<locked>> | 88% | 54,070 psi | 85% | 2920 fps | 100% |
| Bofors RP5 | <<locked>> | 82% | 54,810 psi | 86% | 2907 fps | 100% |
| Hodgdon H1000 | <<locked>> | 88% | 55,216 psi | 87% | 2923 fps | 100% |
| Hodgdon H4831 | <<locked>> | 82% | 56,405 psi | 88% | 2904 fps | 100% |
| Hodgdon H4831 SC | <<locked>> | 82% | 55,405 psi | 87% | 2887 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 86% | 53,983 psi | 85% | 2989 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 38,218 psi | 60% | 1867 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 56,449 psi | 88% | 2877 fps | 100% |
| IMR 7828 SSC | <<locked>> | 84% | 56,681 psi | 89% | 2959 fps | 100% |
| IMR 7977 Enduron | <<locked>> | 88% | 55,129 psi | 86% | 2841 fps | 97.1% |
| IMR 8133 Enduron | <<locked>> | 96% | 56,594 psi | 89% | 2976 fps | 100% |
| Lovex D100 | <<locked>> | 92% | 56,318 psi | 88% | 2897 fps | 96.4% |
| Lovex S071 | <<locked>> | 88% | 56,826 psi | 89% | 2841 fps | 100% |
| Norma 217 | <<locked>> | 94% | 54,433 psi | 85% | 2940 fps | 100% |
| Ramshot Grand | <<locked>> | 82% | 54,375 psi | 85% | 2927 fps | 100% |
| Ramshot Magnum | <<locked>> | 86% | 56,797 psi | 89% | 2910 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 39,276 psi | 62% | 1909 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 86% | 54,491 psi | 85% | 2969 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 90% | 57,711 psi | 90% | 3012 fps | 100% |
| Shooters World 50 BMG | <<locked>> | 92% | 56,318 psi | 88% | 2897 fps | 96.4% |
| SNPE Vectan SP 13ᴾ | <<locked>> | 100% | 56,086 psi | 88% | 2936 fps | 98.9% |
| Vihtavuori 20N29ᴾ | <<locked>> | 100% | 49,472 psi | 78% | 2844 fps | 96.3% |
| Vihtavuori N165 | <<locked>> | 84% | 55,143 psi | 86% | 2835 fps | 100% |
| Vihtavuori N170 | <<locked>> | 88% | 54,534 psi | 85% | 2877 fps | 98.3% |
| Vihtavuori N565 | <<locked>> | 86% | 55,840 psi | 88% | 2933 fps | 100% |
| Vihtavuori N568 | <<locked>> | 88% | 54,128 psi | 85% | 2953 fps | 99.8% |
| Vihtavuori N570 | <<locked>> | 90% | 55,622 psi | 87% | 3022 fps | 99.2% |
| Winchester StaBALL HD | <<locked>> | 82% | 54,563 psi | 86% | 2907 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 82% | 54,694 psi | 86% | 2841 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% | 51,140 psi | 80% | 2759 fps | 100% |
| Accurate 8700 | <<locked>> | 92% | 40,567 psi | 64% | 2674 fps | 95.8% |
| Accurate MAGPRO | <<locked>> | 80% | 53,679 psi | 84% | 2923 fps | 99.9% |
| ADI AR 2213 | <<locked>> | 80% | 50,575 psi | 79% | 2854 fps | 100% |
| ADI AR 2217 | <<locked>> | 80% | 38,029 psi | 60% | 2615 fps | 98.8% |
| ADI AR 2218 | 98.2 gr | 84% | 37,681 psi | 59% | 2687 fps | 95.2% |
| ADI AR 2225 | <<locked>> | 80% | 35,331 psi | 55% | 2589 fps | 99.9% |
| Alliant Reloder-22 | <<locked>> | 80% | 51,300 psi | 80% | 2851 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 80% | 49,980 psi | 78% | 2762 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 44,251 psi | 69% | 2733 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 82% | 39,059 psi | 61% | 2680 fps | 95.7% |
| Alliant Reloder-50 | 102 gr | 86% | 39,349 psi | 62% | 2680 fps | 95.2% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 47,601 psi | 75% | 2762 fps | 98.4% |
| Bofors RP15 | <<locked>> | 80% | 47,834 psi | 75% | 2792 fps | 100% |
| Bofors RP30 | <<locked>> | 80% | 41,394 psi | 65% | 2690 fps | 99.3% |
| Bofors RP5 | <<locked>> | 80% | 51,300 psi | 80% | 2851 fps | 100% |
| Hodgdon H1000 | <<locked>> | 80% | 41,452 psi | 65% | 2684 fps | 99.7% |
| Hodgdon H4831 | <<locked>> | 80% | 52,779 psi | 83% | 2844 fps | 99.9% |
| Hodgdon H4831 SC | <<locked>> | 80% | 51,851 psi | 81% | 2831 fps | 99.9% |
| Hodgdon Retumbo | <<locked>> | 80% | 43,482 psi | 68% | 2805 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,747 psi | 45% | 1670 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 52,968 psi | 83% | 2822 fps | 100% |
| IMR 7828 SSC | <<locked>> | 80% | 49,414 psi | 77% | 2841 fps | 99.9% |
| IMR 7977 Enduron | <<locked>> | 84% | 48,399 psi | 76% | 2723 fps | 95.5% |
| IMR 8133 Enduron | <<locked>> | 80% | 32,924 psi | 52% | 2510 fps | 97% |
| Lovex D100 | <<locked>> | 90% | 52,417 psi | 82% | 2831 fps | 95.5% |
| Lovex S071 | <<locked>> | 80% | 44,208 psi | 69% | 2644 fps | 100% |
| Norma 217 | <<locked>> | 80% | 33,547 psi | 53% | 2539 fps | 99% |
| Ramshot Grand | <<locked>> | 80% | 50,488 psi | 79% | 2864 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 45,513 psi | 71% | 2733 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,501 psi | 46% | 1706 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 43,221 psi | 68% | 2782 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 80% | 39,784 psi | 62% | 2684 fps | 98% |
| Shooters World 50 BMG | <<locked>> | 90% | 52,417 psi | 82% | 2831 fps | 95.5% |
| SNPE Vectan SP 13 | <<locked>> | 90% | 39,914 psi | 63% | 2635 fps | 95.1% |
| Vihtavuori 20N29 | <<locked>> | 98% | 46,064 psi | 72% | 2782 fps | 95.4% |
| Vihtavuori N165 | <<locked>> | 80% | 48,530 psi | 76% | 2730 fps | 100% |
| Vihtavuori N170 | <<locked>> | 80% | 41,785 psi | 65% | 2638 fps | 95.1% |
| Vihtavuori N565 | <<locked>> | 80% | 45,585 psi | 71% | 2756 fps | 99.5% |
| Vihtavuori N568 | <<locked>> | 80% | 40,654 psi | 64% | 2697 fps | 97.8% |
| Vihtavuori N570 | 91.6 gr | 80% | 38,928 psi | 61% | 2690 fps | 95.2% |
| Winchester StaBALL HD | <<locked>> | 80% | 50,647 psi | 79% | 2851 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 51,155 psi | 80% | 2785 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 43 powders for .30-378 Weath. Mag. loaded with the .308 | 210gr | Berger LRBTHP. ADI AR 2218 delivers the highest muzzle velocity at 3,041 fps; across all powders the maximum-charge window runs from 1,867 fps to 3,041 fps. Accurate 8700 gives the best case fill at 100 %, and 43 of the 43 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 210.0 gr projectile in 0.308" calls for a 1:11.5 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. ADI AR 2218, Vihtavuori N570, Alliant Reloder-50 rank at the top here: for .30-378 Weath. Mag. with the .308 | 210gr | Berger LRBTHP 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.