Load Specifications
Load data in caliber .30-40 Krag with .308 | 150gr | Osprey Virtus bullet and 50 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 60, Hodgdon BL-C2 and IMR 3031.
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 2015 | <<locked>> | 88% | 41,814 psi | 89% | 2556 fps | 100% |
| Accurate 2460 | <<locked>> | 84% | 40,045 psi | 85% | 2549 fps | 98.3% |
| Accurate 2495 | <<locked>> | 96% | 42,656 psi | 90% | 2635 fps | 100% |
| Accurate 2520 | <<locked>> | 88% | 40,495 psi | 86% | 2595 fps | 98.1% |
| Accurate 4064 | <<locked>> | 98% | 42,554 psi | 90% | 2657 fps | 99.3% |
| ADI AR 2219 | <<locked>> | 82% | 42,409 psi | 90% | 2612 fps | 99.5% |
| ADI Benchmark 8208 | <<locked>> | 88% | 41,176 psi | 87% | 2566 fps | 96.4% |
| Alliant AR-Comp | <<locked>> | 90% | 41,698 psi | 88% | 2631 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 84% | 41,292 psi | 88% | 2648 fps | 95.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 96% | 40,089 psi | 85% | 2602 fps | 95.8% |
| Alliant Reloder-10x | <<locked>> | 84% | 42,453 psi | 90% | 2575 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 82% | 42,598 psi | 90% | 2513 fps | 99.7% |
| Bofors RP3 | <<locked>> | 98% | 42,090 psi | 89% | 2654 fps | 96.5% |
| Hodgdon Benchmark | <<locked>> | 86% | 41,278 psi | 88% | 2526 fps | 97.1% |
| Hodgdon BL-C2 | <<locked>> | 90% | 41,278 psi | 88% | 2628 fps | 97.2% |
| Hodgdon H322 | <<locked>> | 84% | 41,147 psi | 87% | 2589 fps | 99.3% |
| Hodgdon H335 | <<locked>> | 84% | 41,930 psi | 89% | 2605 fps | 98.8% |
| Hodgdon H4895 | <<locked>> | 90% | 41,423 psi | 88% | 2605 fps | 95.7% |
| Hodgdon LEVERevolution | <<locked>> | 94% | 42,221 psi | 90% | 2667 fps | 96.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 32,953 psi | 70% | 1647 fps | 100% |
| IMR 3031 | <<locked>> | 92% | 42,206 psi | 90% | 2667 fps | 99.9% |
| IMR 4198 | <<locked>> | 82% | 41,394 psi | 88% | 2513 fps | 100% |
| IMR 8208 XBR | <<locked>> | 88% | 41,176 psi | 87% | 2566 fps | 96.4% |
| Lovex D073.5 | <<locked>> | 86% | 42,583 psi | 90% | 2598 fps | 97.8% |
| Lovex D073.6 | <<locked>> | 92% | 41,379 psi | 88% | 2625 fps | 98.3% |
| Lovex S062 | <<locked>> | 94% | 40,669 psi | 86% | 2575 fps | 96.4% |
| Norma 201 | <<locked>> | 90% | 40,059 psi | 85% | 2549 fps | 96.2% |
| Norma 202 | <<locked>> | 90% | 40,030 psi | 85% | 2572 fps | 98.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 32,953 psi | 70% | 1683 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 40,843 psi | 87% | 2562 fps | 97.8% |
| ReloadSwiss RS 60 | <<locked>> | 98% | 40,915 psi | 87% | 2684 fps | 97.5% |
| Rottweil R 901 | <<locked>> | 88% | 41,292 psi | 88% | 2559 fps | 98.5% |
| Rottweil R 902 | <<locked>> | 92% | 40,335 psi | 86% | 2546 fps | 96.3% |
| Rottweil R 903ᴾ | <<locked>> | 100% | 41,974 psi | 89% | 2641 fps | 96.1% |
| Shooters World Match Rifle | <<locked>> | 92% | 41,379 psi | 88% | 2625 fps | 98.3% |
| Shooters World Precision | <<locked>> | 94% | 40,669 psi | 86% | 2575 fps | 96.4% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 40,770 psi | 86% | 2520 fps | 95.8% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 40,596 psi | 86% | 2539 fps | 99.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 40,205 psi | 85% | 2487 fps | 98.4% |
| SNPE Vectan Tubal 5000 | <<locked>> | 96% | 41,858 psi | 89% | 2530 fps | 99.4% |
| Somchem S321 | <<locked>> | 86% | 41,321 psi | 88% | 2595 fps | 96.8% |
| Somchem S335 | <<locked>> | 90% | 41,669 psi | 88% | 2533 fps | 99.3% |
| Vihtavuori N130 | <<locked>> | 84% | 40,466 psi | 86% | 2490 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 39,972 psi | 85% | 2493 fps | 99.8% |
| Vihtavuori N135 | <<locked>> | 94% | 41,133 psi | 87% | 2595 fps | 100% |
| Vihtavuori N140 | <<locked>> | 92% | 40,306 psi | 86% | 2552 fps | 98.8% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 41,959 psi | 89% | 2595 fps | 97.2% |
| Vihtavuori N530 | <<locked>> | 88% | 41,031 psi | 87% | 2562 fps | 96.5% |
| Vihtavuori N540 | <<locked>> | 94% | 41,408 psi | 88% | 2589 fps | 98.6% |
| Winchester 748 | <<locked>> | 90% | 42,192 psi | 90% | 2648 fps | 97.7% |
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 2015 | <<locked>> | 80% | 32,532 psi | 69% | 2369 fps | 98.9% |
| Accurate 2460 | <<locked>> | 80% | 34,867 psi | 74% | 2441 fps | 97% |
| Accurate 2495 | <<locked>> | 80% | 24,424 psi | 52% | 2228 fps | 96.6% |
| Accurate 2520 | <<locked>> | 82% | 32,648 psi | 69% | 2431 fps | 95.9% |
| Accurate 4064 | <<locked>> | 86% | 28,471 psi | 60% | 2352 fps | 95.6% |
| ADI AR 2219 | <<locked>> | 80% | 39,378 psi | 84% | 2552 fps | 99.1% |
| ADI Benchmark 8208 | <<locked>> | 86% | 38,609 psi | 82% | 2516 fps | 95.7% |
| Alliant AR-Comp | <<locked>> | 80% | 29,878 psi | 63% | 2388 fps | 99.9% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 38,638 psi | 82% | 2595 fps | 95% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 37,608 psi | 80% | 2549 fps | 95% |
| Alliant Reloder-10x | <<locked>> | 80% | 37,434 psi | 79% | 2480 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 39,856 psi | 85% | 2464 fps | 99.4% |
| Bofors RP3 | <<locked>> | 96% | 39,363 psi | 84% | 2598 fps | 95.7% |
| Hodgdon Benchmark | <<locked>> | 82% | 36,448 psi | 77% | 2428 fps | 95.7% |
| Hodgdon BL-C2 | 41.7 gr | 86% | 35,737 psi | 76% | 2513 fps | 95.5% |
| Hodgdon H322 | <<locked>> | 80% | 36,013 psi | 76% | 2484 fps | 98.4% |
| Hodgdon H335 | <<locked>> | 80% | 36,347 psi | 77% | 2493 fps | 97.6% |
| Hodgdon H4895 | <<locked>> | 88% | 38,870 psi | 82% | 2556 fps | 95% |
| Hodgdon LEVERevolution | <<locked>> | 92% | 39,682 psi | 84% | 2615 fps | 95.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 24,424 psi | 52% | 1473 fps | 100% |
| IMR 3031 | 35.2 gr | 80% | 28,398 psi | 60% | 2356 fps | 96.9% |
| IMR 4198 | <<locked>> | 80% | 38,986 psi | 83% | 2470 fps | 100% |
| IMR 8208 XBR | <<locked>> | 86% | 38,609 psi | 82% | 2516 fps | 95.7% |
| Lovex D073.5 | <<locked>> | 80% | 34,548 psi | 73% | 2434 fps | 95.5% |
| Lovex D073.6 | <<locked>> | 84% | 31,169 psi | 66% | 2408 fps | 95.2% |
| Lovex S062 | <<locked>> | 92% | 38,145 psi | 81% | 2526 fps | 95.7% |
| Norma 201 | <<locked>> | 88% | 37,594 psi | 80% | 2500 fps | 95.5% |
| Norma 202 | <<locked>> | 80% | 28,819 psi | 61% | 2316 fps | 95% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 24,294 psi | 52% | 1506 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 35,897 psi | 76% | 2461 fps | 96.4% |
| ReloadSwiss RS 60 | 44.9 gr | 94% | 35,882 psi | 76% | 2562 fps | 95.5% |
| Rottweil R 901 | <<locked>> | 80% | 32,227 psi | 68% | 2362 fps | 96.1% |
| Rottweil R 902 | <<locked>> | 90% | 37,797 psi | 80% | 2497 fps | 95.5% |
| Rottweil R 903 | <<locked>> | 98% | 39,262 psi | 83% | 2589 fps | 95.3% |
| Shooters World Match Rifle | <<locked>> | 84% | 31,169 psi | 66% | 2408 fps | 95.2% |
| Shooters World Precision | <<locked>> | 92% | 38,145 psi | 81% | 2526 fps | 95.7% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 37,956 psi | 81% | 2464 fps | 95% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 38,218 psi | 81% | 2493 fps | 99.4% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 31,285 psi | 66% | 2297 fps | 95.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 26,760 psi | 57% | 2201 fps | 95.3% |
| Somchem S321 | <<locked>> | 82% | 35,897 psi | 76% | 2484 fps | 95.2% |
| Somchem S335 | <<locked>> | 80% | 30,371 psi | 64% | 2293 fps | 96.6% |
| Vihtavuori N130 | <<locked>> | 80% | 35,766 psi | 76% | 2398 fps | 99.8% |
| Vihtavuori N133 | <<locked>> | 80% | 31,154 psi | 66% | 2313 fps | 98.5% |
| Vihtavuori N135 | <<locked>> | 80% | 26,034 psi | 55% | 2257 fps | 97.1% |
| Vihtavuori N140 | <<locked>> | 82% | 29,109 psi | 62% | 2306 fps | 95.6% |
| Vihtavuori N150 | <<locked>> | 94% | 34,447 psi | 73% | 2444 fps | 95% |
| Vihtavuori N530 | <<locked>> | 86% | 38,421 psi | 82% | 2510 fps | 95.7% |
| Vihtavuori N540 | <<locked>> | 84% | 29,892 psi | 63% | 2339 fps | 95.3% |
| Winchester 748 | <<locked>> | 84% | 34,374 psi | 73% | 2484 fps | 95.3% |
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 .30-40 Krag loaded with the .308 | 150gr | Osprey Virtus. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,684 fps; across all powders the maximum-charge window runs from 1,647 fps to 2,684 fps. Hodgdon TrailBoss 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 (325 MPa), the top charges use 70–90 %, leaving at least 10 % headroom. The 150.0 gr projectile in 0.308" calls for a 1:13.0 twist; slower twists will usually not stabilise this weight. Hodgdon TrailBoss, ReloadSwiss RS 14, Rottweil R 903 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. ReloadSwiss RS 60, Hodgdon BL-C2, IMR 3031 rank at the top here: for .30-40 Krag with the .308 | 150gr | Osprey Virtus 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.