Load Specifications
Load data in caliber .30-40 Krag with .308 | 125gr | Sierra MatchKing bullet and 37 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Hodgdon H322, ADI AR 2219 and Alliant AR-Comp.
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: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 1680 | <<locked>> | 82% | 40,959 psi | 87% | 2720 fps | 99.6% |
| Accurate 2015 | <<locked>> | 98% | 42,409 psi | 90% | 2835 fps | 99.4% |
| Accurate 2460 | <<locked>> | 94% | 40,770 psi | 86% | 2825 fps | 96.8% |
| Accurate 2495ᴾ | <<locked>> | 100% | 31,227 psi | 66% | 2677 fps | 97.5% |
| Accurate 2520 | <<locked>> | 98% | 41,524 psi | 88% | 2874 fps | 96.5% |
| Accurate LT-30 | <<locked>> | 88% | 42,511 psi | 90% | 2743 fps | 98.4% |
| Accurate LT-32 | <<locked>> | 86% | 40,132 psi | 85% | 2694 fps | 95.9% |
| ADI AR 2207 | <<locked>> | 86% | 40,727 psi | 86% | 2782 fps | 100% |
| ADI AR 2219 | <<locked>> | 90% | 42,337 psi | 90% | 2871 fps | 98.2% |
| Alliant AR-Comp | <<locked>> | 98% | 39,943 psi | 85% | 2874 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 92% | 40,582 psi | 86% | 2818 fps | 99.7% |
| Alliant Reloder-7 | <<locked>> | 86% | 42,076 psi | 89% | 2785 fps | 99.9% |
| Baschieri & Pellagri 106 | <<locked>> | 88% | 40,567 psi | 86% | 2720 fps | 98.3% |
| Hodgdon H322 | <<locked>> | 92% | 40,669 psi | 86% | 2838 fps | 97.9% |
| Hodgdon H335 | <<locked>> | 92% | 41,727 psi | 89% | 2858 fps | 97.2% |
| Hodgdon H4198 | <<locked>> | 84% | 41,321 psi | 88% | 2736 fps | 97.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 29,892 psi | 63% | 1781 fps | 100% |
| IMR 3031ᴾ | <<locked>> | 100% | 40,408 psi | 86% | 2897 fps | 98.6% |
| IMR 4198 | <<locked>> | 90% | 41,220 psi | 87% | 2779 fps | 100% |
| Lovex D073.4 | <<locked>> | 88% | 41,742 psi | 89% | 2848 fps | 96.3% |
| Lovex S053 | <<locked>> | 82% | 42,569 psi | 90% | 2713 fps | 100% |
| Norma 200 | <<locked>> | 90% | 42,018 psi | 89% | 2835 fps | 100% |
| Norma 202ᴾ | <<locked>> | 100% | 41,133 psi | 87% | 2848 fps | 97.1% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 28,863 psi | 61% | 1814 fps | 100% |
| Rottweil R 901 | <<locked>> | 98% | 39,784 psi | 84% | 2802 fps | 96.6% |
| Shooters World AR Plus | <<locked>> | 88% | 41,742 psi | 89% | 2848 fps | 96.3% |
| SNPE Vectan BA6 1/2 | <<locked>> | 84% | 41,698 psi | 88% | 2546 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 90% | 42,627 psi | 90% | 2871 fps | 97.3% |
| SNPE Vectan SP 3 | <<locked>> | 90% | 39,726 psi | 84% | 2789 fps | 98.4% |
| SNPE Vectan Tubal 3000 | <<locked>> | 98% | 42,119 psi | 89% | 2772 fps | 97.1% |
| SNPE Vectan Tubal 5000ᴾ | <<locked>> | 100% | 35,665 psi | 76% | 2651 fps | 96.5% |
| Somchem S335 | <<locked>> | 98% | 40,016 psi | 85% | 2756 fps | 97.6% |
| Vihtavuori N120 | <<locked>> | 86% | 41,133 psi | 87% | 2743 fps | 100% |
| Vihtavuori N130 | <<locked>> | 94% | 42,148 psi | 89% | 2785 fps | 99.7% |
| Vihtavuori N133 | <<locked>> | 98% | 41,727 psi | 89% | 2782 fps | 99.2% |
| Vihtavuori N135ᴾ | <<locked>> | 100% | 35,781 psi | 76% | 2756 fps | 98.5% |
| Vihtavuori N140ᴾ | <<locked>> | 100% | 38,885 psi | 82% | 2776 fps | 96.8% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 1680 | <<locked>> | 80% | 37,869 psi | 80% | 2661 fps | 99.3% |
| Accurate 2015 | <<locked>> | 86% | 26,977 psi | 57% | 2484 fps | 95.3% |
| Accurate 2460 | <<locked>> | 92% | 37,492 psi | 80% | 2756 fps | 95.9% |
| Accurate 2495 | <<locked>> | 96% | 26,237 psi | 56% | 2543 fps | 95.5% |
| Accurate 2520 | <<locked>> | 96% | 38,145 psi | 81% | 2805 fps | 95.5% |
| Accurate LT-30 | <<locked>> | 80% | 32,300 psi | 69% | 2523 fps | 95.6% |
| Accurate LT-32 | <<locked>> | 84% | 37,434 psi | 79% | 2635 fps | 95.1% |
| ADI AR 2207 | <<locked>> | 80% | 32,692 psi | 69% | 2618 fps | 100% |
| ADI AR 2219 | 39.6 gr | 84% | 33,750 psi | 72% | 2684 fps | 95.9% |
| Alliant AR-Comp | 37.1 gr | 84% | 23,685 psi | 50% | 2448 fps | 96.2% |
| Alliant Reloder-10x | <<locked>> | 80% | 26,252 psi | 56% | 2474 fps | 96.2% |
| Alliant Reloder-7 | <<locked>> | 80% | 33,779 psi | 72% | 2615 fps | 99% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 30,327 psi | 64% | 2493 fps | 95.2% |
| Hodgdon H322 | 39.2 gr | 86% | 32,663 psi | 69% | 2657 fps | 95.5% |
| Hodgdon H335 | <<locked>> | 88% | 35,621 psi | 76% | 2726 fps | 95.4% |
| Hodgdon H4198 | <<locked>> | 80% | 36,129 psi | 77% | 2625 fps | 96.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 21,089 psi | 45% | 1585 fps | 100% |
| IMR 3031 | <<locked>> | 92% | 30,255 psi | 64% | 2654 fps | 95.5% |
| IMR 4198 | <<locked>> | 80% | 29,544 psi | 63% | 2513 fps | 98.2% |
| Lovex D073.4 | <<locked>> | 86% | 38,682 psi | 82% | 2785 fps | 95.4% |
| Lovex S053 | <<locked>> | 80% | 39,595 psi | 84% | 2661 fps | 100% |
| Norma 200 | <<locked>> | 80% | 28,601 psi | 61% | 2539 fps | 98% |
| Norma 202 | <<locked>> | 96% | 35,520 psi | 75% | 2730 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 20,015 psi | 42% | 1608 fps | 100% |
| Rottweil R 901 | <<locked>> | 96% | 36,941 psi | 78% | 2743 fps | 95.8% |
| Shooters World AR Plus | <<locked>> | 86% | 38,682 psi | 82% | 2785 fps | 95.4% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 36,941 psi | 78% | 2467 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 86% | 36,448 psi | 77% | 2740 fps | 95.5% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 29,921 psi | 63% | 2559 fps | 95.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 94% | 36,622 psi | 78% | 2661 fps | 95.6% |
| SNPE Vectan Tubal 5000 | <<locked>> | 98% | 33,141 psi | 70% | 2595 fps | 95.6% |
| Somchem S335 | <<locked>> | 92% | 32,285 psi | 68% | 2589 fps | 95.3% |
| Vihtavuori N120 | <<locked>> | 80% | 33,127 psi | 70% | 2589 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 25,469 psi | 54% | 2395 fps | 95.5% |
| Vihtavuori N133 | <<locked>> | 86% | 27,325 psi | 58% | 2454 fps | 95.1% |
| Vihtavuori N135 | <<locked>> | 92% | 26,513 psi | 56% | 2516 fps | 95.1% |
| Vihtavuori N140 | <<locked>> | 96% | 33,663 psi | 71% | 2657 fps | 95.1% |
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 67 powders for .30-40 Krag loaded with the .308 | 125gr | Sierra MatchKing. IMR 3031 delivers the highest muzzle velocity at 2,897 fps; across all powders the maximum-charge window runs from 1,781 fps to 2,897 fps. Accurate 2495 gives the best case fill at 100 %, and 67 of the 67 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (325 MPa), the top charges use 61–90 %, leaving at least 10 % headroom. The 125.0 gr projectile in 0.308" calls for a 1:12.0 twist; slower twists will usually not stabilise this weight. Accurate 2495, Accurate 4064, Hodgdon LEVERevolution 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. Hodgdon H322, ADI AR 2219, Alliant AR-Comp rank at the top here: for .30-40 Krag with the .308 | 125gr | Sierra MatchKing they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 2230, Accurate 4064, ADI AR 2206H 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.