Load Specifications
Load data in caliber .30-378 Weath. Mag. with .308 | 220gr | Lapua ScenarL 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% | 56,101 psi | 88% | 2772 fps | 100% |
| Accurate 8700ᴾ | <<locked>> | 100% | 56,463 psi | 88% | 2907 fps | 99.5% |
| ADI AR 2213 | <<locked>> | 82% | 55,869 psi | 88% | 2881 fps | 100% |
| ADI AR 2217 | <<locked>> | 90% | 55,825 psi | 87% | 2874 fps | 100% |
| ADI AR 2218 | <<locked>> | 94% | 56,391 psi | 88% | 3018 fps | 99.9% |
| ADI AR 2225 | <<locked>> | 92% | 55,912 psi | 88% | 2897 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 82% | 56,492 psi | 89% | 2874 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 82% | 55,071 psi | 86% | 2776 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 86% | 56,086 psi | 88% | 2858 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 90% | 54,505 psi | 85% | 2927 fps | 99.6% |
| Alliant Reloder-50 | <<locked>> | 94% | 54,926 psi | 86% | 2930 fps | 99.4% |
| Baschieri & Pellagri 109 | <<locked>> | 84% | 55,680 psi | 87% | 2848 fps | 99.7% |
| Bofors RP15 | <<locked>> | 84% | 56,057 psi | 88% | 2867 fps | 100% |
| Bofors RP30 | <<locked>> | 88% | 55,970 psi | 88% | 2890 fps | 100% |
| Bofors RP5 | <<locked>> | 82% | 56,492 psi | 89% | 2874 fps | 100% |
| Hodgdon H1000 | <<locked>> | 88% | 57,043 psi | 89% | 2887 fps | 100% |
| Hodgdon H4831 SC | <<locked>> | 82% | 57,000 psi | 89% | 2854 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 86% | 56,130 psi | 88% | 2956 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 38,261 psi | 60% | 1824 fps | 100% |
| Hodgdon US 869 | <<locked>> | 98% | 57,116 psi | 90% | 2907 fps | 96.6% |
| IMR 4955 Enduron | <<locked>> | 82% | 57,696 psi | 90% | 2838 fps | 100% |
| IMR 7828 SSC | <<locked>> | 82% | 54,665 psi | 86% | 2867 fps | 100% |
| IMR 7977 Enduron | <<locked>> | 88% | 56,463 psi | 88% | 2808 fps | 97.8% |
| IMR 8133 Enduron | <<locked>> | 94% | 54,926 psi | 86% | 2890 fps | 100% |
| Lovex D100 | <<locked>> | 90% | 54,041 psi | 85% | 2805 fps | 96.4% |
| Lovex S071 | <<locked>> | 86% | 54,911 psi | 86% | 2756 fps | 100% |
| Norma 217 | <<locked>> | 94% | 56,637 psi | 89% | 2913 fps | 100% |
| Ramshot Grand | <<locked>> | 82% | 56,130 psi | 88% | 2890 fps | 100% |
| Ramshot LRT | <<locked>> | 94% | 55,898 psi | 88% | 2946 fps | 96.6% |
| Ramshot Magnum | <<locked>> | 84% | 54,563 psi | 86% | 2822 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 39,349 psi | 62% | 1867 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 86% | 56,594 psi | 89% | 2940 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 88% | 55,564 psi | 87% | 2923 fps | 100% |
| Shooters World 50 BMG | <<locked>> | 90% | 54,041 psi | 85% | 2805 fps | 96.4% |
| SNPE Vectan SP 13 | <<locked>> | 98% | 54,186 psi | 85% | 2851 fps | 99% |
| Vihtavuori 20N29ᴾ | <<locked>> | 100% | 51,314 psi | 80% | 2828 fps | 97.3% |
| Vihtavuori N165 | <<locked>> | 84% | 56,739 psi | 89% | 2799 fps | 100% |
| Vihtavuori N170 | <<locked>> | 88% | 56,289 psi | 88% | 2851 fps | 98.9% |
| Vihtavuori N565 | <<locked>> | 86% | 57,711 psi | 90% | 2900 fps | 100% |
| Vihtavuori N568 | <<locked>> | 88% | 56,014 psi | 88% | 2923 fps | 100% |
| Vihtavuori N570 | <<locked>> | 90% | 57,609 psi | 90% | 2995 fps | 99.7% |
| Winchester StaBALL HD | <<locked>> | 82% | 56,724 psi | 89% | 2871 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 82% | 56,304 psi | 88% | 2808 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% | 52,518 psi | 82% | 2720 fps | 100% |
| Accurate 8700 | <<locked>> | 90% | 39,218 psi | 61% | 2595 fps | 95.9% |
| ADI AR 2213 | <<locked>> | 80% | 52,185 psi | 82% | 2822 fps | 100% |
| ADI AR 2217 | <<locked>> | 80% | 39,378 psi | 62% | 2589 fps | 99.4% |
| ADI AR 2218 | 95.4 gr | 82% | 36,332 psi | 57% | 2605 fps | 95.2% |
| ADI AR 2225 | <<locked>> | 80% | 36,709 psi | 58% | 2569 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 80% | 52,895 psi | 83% | 2818 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 80% | 51,503 psi | 81% | 2723 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 45,832 psi | 72% | 2700 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 80% | 37,724 psi | 59% | 2598 fps | 95.8% |
| Alliant Reloder-50 | 99.2 gr | 84% | 38,174 psi | 60% | 2602 fps | 95.4% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 48,936 psi | 77% | 2733 fps | 98.9% |
| Bofors RP15 | <<locked>> | 80% | 49,313 psi | 77% | 2759 fps | 100% |
| Bofors RP30 | <<locked>> | 80% | 42,743 psi | 67% | 2661 fps | 99.7% |
| Bofors RP5 | <<locked>> | 80% | 52,895 psi | 83% | 2818 fps | 100% |
| Hodgdon H1000 | <<locked>> | 80% | 42,946 psi | 67% | 2661 fps | 99.9% |
| Hodgdon H4831 SC | <<locked>> | 80% | 53,301 psi | 84% | 2795 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 80% | 45,266 psi | 71% | 2782 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,747 psi | 45% | 1631 fps | 100% |
| Hodgdon US 869 | <<locked>> | 96% | 53,301 psi | 84% | 2848 fps | 95.7% |
| IMR 4955 Enduron | <<locked>> | 80% | 54,302 psi | 85% | 2785 fps | 100% |
| IMR 7828 SSC | <<locked>> | 80% | 51,039 psi | 80% | 2812 fps | 100% |
| IMR 7977 Enduron | <<locked>> | 82% | 46,702 psi | 73% | 2641 fps | 95.6% |
| IMR 8133 Enduron | <<locked>> | 80% | 34,229 psi | 54% | 2490 fps | 98% |
| Lovex D100 | <<locked>> | 88% | 50,459 psi | 79% | 2746 fps | 95.5% |
| Lovex S071 | <<locked>> | 80% | 45,498 psi | 71% | 2608 fps | 100% |
| Norma 217 | <<locked>> | 80% | 34,983 psi | 55% | 2520 fps | 99.6% |
| Ramshot Grand | <<locked>> | 80% | 52,286 psi | 82% | 2831 fps | 100% |
| Ramshot LRT | <<locked>> | 92% | 52,112 psi | 82% | 2881 fps | 95.6% |
| Ramshot Magnum | <<locked>> | 80% | 47,166 psi | 74% | 2707 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,646 psi | 46% | 1670 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 45,107 psi | 71% | 2759 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 80% | 41,423 psi | 65% | 2667 fps | 98.8% |
| Shooters World 50 BMG | <<locked>> | 88% | 50,459 psi | 79% | 2746 fps | 95.5% |
| SNPE Vectan SP 13 | <<locked>> | 88% | 38,696 psi | 61% | 2559 fps | 95.2% |
| Vihtavuori 20N29 | <<locked>> | 96% | 44,628 psi | 70% | 2700 fps | 95.5% |
| Vihtavuori N165 | <<locked>> | 80% | 49,777 psi | 78% | 2694 fps | 100% |
| Vihtavuori N170 | <<locked>> | 80% | 42,975 psi | 67% | 2612 fps | 96.1% |
| Vihtavuori N565 | <<locked>> | 80% | 47,137 psi | 74% | 2730 fps | 99.8% |
| Vihtavuori N568 | <<locked>> | 80% | 42,206 psi | 66% | 2677 fps | 98.6% |
| Vihtavuori N570 | 91.1 gr | 80% | 40,364 psi | 63% | 2671 fps | 96.4% |
| Winchester StaBALL HD | <<locked>> | 80% | 52,678 psi | 83% | 2815 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 52,489 psi | 82% | 2753 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 | 220gr | Lapua ScenarL. ADI AR 2218 delivers the highest muzzle velocity at 3,018 fps; across all powders the maximum-charge window runs from 1,824 fps to 3,018 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 220.0 gr projectile in 0.308" calls for a 1:11.0 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, Alliant Reloder-50 rank at the top here: for .30-378 Weath. Mag. with the .308 | 220gr | Lapua ScenarL 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.