Load Specifications
Load data in caliber .340 Weath. Mag. with .338 | 250gr | Alaska Bullet Works Kodiak PP SPBC bullet and 92 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, Norma MRP and Vihtavuori N560.
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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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 2495 | <<locked>> | 82% | 57,580 psi | 90% | 2575 fps | 100% |
| Accurate 2700 | <<locked>> | 82% | 54,882 psi | 86% | 2612 fps | 99.6% |
| Accurate 3100ᴾ | <<locked>> | 100% | 56,797 psi | 89% | 2710 fps | 100% |
| Accurate 4064 | <<locked>> | 82% | 54,534 psi | 85% | 2585 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 55,347 psi | 87% | 2703 fps | 100% |
| Accurate MAGPRO | <<locked>> | 98% | 55,100 psi | 86% | 2805 fps | 97.8% |
| ADI AR 2208 | <<locked>> | 84% | 54,331 psi | 85% | 2621 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 56,173 psi | 88% | 2753 fps | 99.4% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 57,348 psi | 90% | 2805 fps | 98.8% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 36,970 psi | 58% | 2497 fps | 97.5% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 57,421 psi | 90% | 2789 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 55,303 psi | 87% | 2641 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 55,434 psi | 87% | 2664 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 56,115 psi | 88% | 2753 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 57,479 psi | 90% | 2772 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 55,506 psi | 87% | 2743 fps | 99.4% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 56,434 psi | 88% | 2799 fps | 99.6% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 53,606 psi | 84% | 2723 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 46,398 psi | 73% | 2674 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 98% | 57,696 psi | 90% | 2864 fps | 100% |
| Baschieri & Pellagri 109ᴾ | <<locked>> | 100% | 56,391 psi | 88% | 2717 fps | 95.8% |
| Bofors RP15ᴾ | <<locked>> | 100% | 51,735 psi | 81% | 2730 fps | 99% |
| Bofors RP3 | <<locked>> | 84% | 56,028 psi | 88% | 2657 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 42,206 psi | 66% | 2602 fps | 96.6% |
| Bofors RP5ᴾ | <<locked>> | 100% | 56,434 psi | 88% | 2799 fps | 99.6% |
| Bofors RP7 | <<locked>> | 88% | 55,245 psi | 87% | 2651 fps | 99.7% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 45,934 psi | 72% | 2615 fps | 97.5% |
| Hodgdon H380 | <<locked>> | 84% | 56,376 psi | 88% | 2677 fps | 100% |
| Hodgdon H414 | <<locked>> | 90% | 57,348 psi | 90% | 2753 fps | 100% |
| Hodgdon H4350 | <<locked>> | 88% | 56,840 psi | 89% | 2710 fps | 99.6% |
| Hodgdon H4831 | <<locked>> | 98% | 57,551 psi | 90% | 2749 fps | 98.3% |
| Hodgdon H4831 SC | <<locked>> | 98% | 56,420 psi | 88% | 2733 fps | 98.1% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 56,449 psi | 88% | 2677 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 45,513 psi | 71% | 2717 fps | 98.8% |
| Hodgdon Superformance | <<locked>> | 88% | 53,737 psi | 84% | 2740 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,593 psi | 57% | 1631 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 57,232 psi | 90% | 2648 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 56,086 psi | 88% | 2638 fps | 99.9% |
| IMR 4350 | <<locked>> | 92% | 56,347 psi | 88% | 2687 fps | 99.8% |
| IMR 4451 Enduron | <<locked>> | 88% | 56,898 psi | 89% | 2677 fps | 99.9% |
| IMR 4831 | <<locked>> | 92% | 55,608 psi | 87% | 2690 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 56,884 psi | 89% | 2687 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 55,506 psi | 87% | 2684 fps | 98.1% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 54,781 psi | 86% | 2782 fps | 98.6% |
| Lovex S062 | <<locked>> | 84% | 57,435 psi | 90% | 2638 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 57,145 psi | 90% | 2671 fps | 100% |
| Lovex S070 | <<locked>> | 90% | 55,042 psi | 86% | 2667 fps | 99.9% |
| Lovex S071ᴾ | <<locked>> | 100% | 47,326 psi | 74% | 2579 fps | 99.7% |
| Norma 203B | <<locked>> | 82% | 54,795 psi | 86% | 2651 fps | 100% |
| Norma 204 | <<locked>> | 92% | 57,305 psi | 90% | 2743 fps | 99.4% |
| Norma MRP | <<locked>> | 98% | 56,246 psi | 88% | 2825 fps | 100% |
| Norma URP | <<locked>> | 92% | 57,493 psi | 90% | 2733 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 55,347 psi | 87% | 2674 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 55,405 psi | 87% | 2802 fps | 98.9% |
| Ramshot Hunter | <<locked>> | 92% | 56,304 psi | 88% | 2743 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 49,255 psi | 77% | 2677 fps | 99.2% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,449 psi | 59% | 1673 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 56,260 psi | 88% | 2667 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 56,956 psi | 89% | 2759 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 55,143 psi | 86% | 2726 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 57,276 psi | 90% | 2805 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 45,295 psi | 71% | 2713 fps | 99.5% |
| Rottweil R 902 | <<locked>> | 82% | 56,057 psi | 88% | 2605 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 56,333 psi | 88% | 2654 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 54,244 psi | 85% | 2671 fps | 98.4% |
| Rottweil R 905 | <<locked>> | 96% | 54,810 psi | 86% | 2730 fps | 99.4% |
| Rottweil R 907 | <<locked>> | 88% | 55,245 psi | 87% | 2651 fps | 99.7% |
| Shooters World Long Rifle | <<locked>> | 90% | 57,145 psi | 90% | 2671 fps | 100% |
| Shooters World Precision | <<locked>> | 84% | 57,435 psi | 90% | 2638 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 55,042 psi | 86% | 2667 fps | 99.9% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 57,711 psi | 90% | 2713 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 56,869 psi | 89% | 2533 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 56,826 psi | 89% | 2631 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 54,331 psi | 85% | 2723 fps | 99.3% |
| Somchem S355 | <<locked>> | 86% | 56,086 psi | 88% | 2651 fps | 100% |
| Somchem S361 | <<locked>> | 94% | 55,695 psi | 87% | 2664 fps | 97.9% |
| Somchem S365 | <<locked>> | 94% | 57,043 psi | 89% | 2730 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 55,303 psi | 87% | 2703 fps | 99.7% |
| Vihtavuori N135 | <<locked>> | 82% | 56,420 psi | 88% | 2559 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 56,666 psi | 89% | 2575 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 57,377 psi | 90% | 2621 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 56,014 psi | 88% | 2677 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 54,563 psi | 86% | 2677 fps | 99.5% |
| Vihtavuori N540 | <<locked>> | 82% | 54,650 psi | 86% | 2575 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 55,085 psi | 86% | 2687 fps | 100% |
| Vihtavuori N555 | <<locked>> | 98% | 56,028 psi | 88% | 2746 fps | 100% |
| Vihtavuori N560 | <<locked>> | 98% | 56,420 psi | 88% | 2818 fps | 98.5% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 48,124 psi | 75% | 2680 fps | 97.3% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 55,448 psi | 87% | 2644 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 57,566 psi | 90% | 2756 fps | 100% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 49,023 psi | 77% | 2795 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 55,317 psi | 87% | 2700 fps | 99.3% |
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 2495 | <<locked>> | 80% | 54,027 psi | 85% | 2533 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 51,445 psi | 81% | 2559 fps | 99.2% |
| Accurate 3100 | <<locked>> | 80% | 29,008 psi | 45% | 2211 fps | 95.5% |
| Accurate 4064 | <<locked>> | 80% | 51,227 psi | 80% | 2543 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 39,363 psi | 62% | 2448 fps | 99.6% |
| Accurate MAGPRO | <<locked>> | 92% | 44,614 psi | 70% | 2631 fps | 95.4% |
| ADI AR 2208 | <<locked>> | 80% | 48,022 psi | 75% | 2526 fps | 100% |
| ADI AR 2209 | <<locked>> | 84% | 37,971 psi | 60% | 2434 fps | 95.7% |
| ADI AR 2213 | <<locked>> | 90% | 41,234 psi | 65% | 2526 fps | 95.3% |
| ADI AR 2225 | <<locked>> | 96% | 32,619 psi | 51% | 2385 fps | 95.5% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 53,606 psi | 84% | 2736 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 48,820 psi | 77% | 2549 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 51,924 psi | 81% | 2612 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 38,145 psi | 60% | 2457 fps | 99.7% |
| Alliant Reloder-17 | <<locked>> | 80% | 43,352 psi | 68% | 2569 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 35,491 psi | 56% | 2379 fps | 95% |
| Alliant Reloder-22 | <<locked>> | 86% | 35,578 psi | 56% | 2425 fps | 95.2% |
| Alliant Reloder-23 | <<locked>> | 80% | 28,094 psi | 44% | 2241 fps | 98.6% |
| Alliant Reloder-25 | <<locked>> | 84% | 28,036 psi | 44% | 2251 fps | 95.3% |
| Alliant Reloder-26 | 70 gr | 80% | 29,979 psi | 47% | 2352 fps | 97.4% |
| Baschieri & Pellagri 109 | <<locked>> | 98% | 52,910 psi | 83% | 2661 fps | 95% |
| Bofors RP15 | <<locked>> | 90% | 37,579 psi | 59% | 2470 fps | 95.8% |
| Bofors RP3 | <<locked>> | 80% | 49,356 psi | 77% | 2566 fps | 100% |
| Bofors RP30 | <<locked>> | 98% | 39,595 psi | 62% | 2549 fps | 95.8% |
| Bofors RP5 | <<locked>> | 86% | 35,578 psi | 56% | 2425 fps | 95.2% |
| Bofors RP7 | <<locked>> | 80% | 43,105 psi | 68% | 2454 fps | 98.2% |
| Hodgdon H1000 | <<locked>> | 96% | 40,190 psi | 63% | 2503 fps | 95.8% |
| Hodgdon H380 | <<locked>> | 80% | 49,574 psi | 78% | 2582 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 41,191 psi | 65% | 2490 fps | 98.3% |
| Hodgdon H4350 | <<locked>> | 80% | 44,222 psi | 69% | 2510 fps | 97.8% |
| Hodgdon H4831 | <<locked>> | 90% | 44,092 psi | 69% | 2533 fps | 95.5% |
| Hodgdon H4831 SC | <<locked>> | 90% | 43,250 psi | 68% | 2520 fps | 95.3% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 35,781 psi | 56% | 2352 fps | 99.9% |
| Hodgdon Retumbo | <<locked>> | 92% | 35,172 psi | 55% | 2484 fps | 95.4% |
| Hodgdon Superformance | <<locked>> | 80% | 40,074 psi | 63% | 2507 fps | 97.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,514 psi | 43% | 1457 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 50,517 psi | 79% | 2556 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 52,794 psi | 83% | 2592 fps | 99.7% |
| IMR 4350 | <<locked>> | 80% | 38,783 psi | 61% | 2392 fps | 97.2% |
| IMR 4451 Enduron | <<locked>> | 80% | 44,599 psi | 70% | 2484 fps | 98.8% |
| IMR 4831 | <<locked>> | 80% | 37,797 psi | 59% | 2405 fps | 99.5% |
| IMR 4895 | <<locked>> | 80% | 53,287 psi | 84% | 2638 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 88% | 43,250 psi | 68% | 2484 fps | 95.5% |
| IMR 7828 SSC | <<locked>> | 92% | 42,003 psi | 66% | 2556 fps | 95.7% |
| Lovex S062 | <<locked>> | 80% | 50,952 psi | 80% | 2552 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 42,061 psi | 66% | 2434 fps | 99.3% |
| Lovex S070 | <<locked>> | 80% | 40,292 psi | 63% | 2421 fps | 98.2% |
| Lovex S071 | <<locked>> | 84% | 28,543 psi | 45% | 2198 fps | 95.2% |
| Norma 203B | <<locked>> | 80% | 51,285 psi | 80% | 2598 fps | 100% |
| Norma 204 | <<locked>> | 80% | 38,290 psi | 60% | 2421 fps | 95.8% |
| Norma MRP | 69.7 gr | 82% | 32,474 psi | 51% | 2379 fps | 95.5% |
| Norma URP | <<locked>> | 80% | 39,015 psi | 61% | 2441 fps | 99.5% |
| Ramshot Big Game | <<locked>> | 80% | 51,837 psi | 81% | 2628 fps | 100% |
| Ramshot Grand | <<locked>> | 90% | 38,856 psi | 61% | 2503 fps | 95% |
| Ramshot Hunter | <<locked>> | 80% | 37,913 psi | 59% | 2434 fps | 98.3% |
| Ramshot Magnum | <<locked>> | 90% | 34,621 psi | 54% | 2395 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,007 psi | 44% | 1493 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 49,429 psi | 77% | 2566 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 46,050 psi | 72% | 2612 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 39,218 psi | 61% | 2467 fps | 99.5% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 37,826 psi | 59% | 2477 fps | 99.2% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 32,184 psi | 50% | 2405 fps | 95.1% |
| Rottweil R 902 | <<locked>> | 80% | 52,692 psi | 83% | 2559 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 46,369 psi | 73% | 2513 fps | 100% |
| Rottweil R 904 | <<locked>> | 84% | 39,421 psi | 62% | 2415 fps | 95% |
| Rottweil R 905 | <<locked>> | 84% | 36,941 psi | 58% | 2415 fps | 95.8% |
| Rottweil R 907 | <<locked>> | 80% | 43,105 psi | 68% | 2454 fps | 98.2% |
| Shooters World Long Rifle | <<locked>> | 80% | 42,061 psi | 66% | 2434 fps | 99.3% |
| Shooters World Precision | <<locked>> | 80% | 50,952 psi | 80% | 2552 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 40,292 psi | 63% | 2421 fps | 98.2% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 47,572 psi | 75% | 2569 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 47,398 psi | 74% | 2411 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 41,205 psi | 65% | 2385 fps | 98.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 36,593 psi | 57% | 2408 fps | 95.6% |
| Somchem S355 | <<locked>> | 80% | 46,557 psi | 73% | 2513 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 42,902 psi | 67% | 2457 fps | 95.1% |
| Somchem S365 | <<locked>> | 80% | 35,621 psi | 56% | 2402 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 33,011 psi | 52% | 2300 fps | 95.2% |
| Vihtavuori N135 | <<locked>> | 80% | 53,142 psi | 83% | 2516 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 53,098 psi | 83% | 2533 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 44,440 psi | 70% | 2444 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 40,408 psi | 63% | 2434 fps | 99.6% |
| Vihtavuori N165 | <<locked>> | 86% | 34,534 psi | 54% | 2329 fps | 95.4% |
| Vihtavuori N540 | <<locked>> | 80% | 51,416 psi | 81% | 2533 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 39,943 psi | 63% | 2441 fps | 99.5% |
| Vihtavuori N555 | <<locked>> | 80% | 31,270 psi | 49% | 2313 fps | 98.6% |
| Vihtavuori N560 | 76.5 gr | 90% | 43,033 psi | 67% | 2592 fps | 95.6% |
| Vihtavuori N565 | <<locked>> | 96% | 42,134 psi | 66% | 2572 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 39,421 psi | 62% | 2405 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 41,379 psi | 65% | 2497 fps | 98.4% |
| Winchester StaBALL HD | <<locked>> | 80% | 24,860 psi | 39% | 2234 fps | 98.2% |
| Winchester Supreme 780 | <<locked>> | 86% | 36,651 psi | 57% | 2382 fps | 95.4% |
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 92 powders for .340 Weath. Mag. loaded with the .338 | 250gr | Alaska Bullet Works Kodiak PP SPBC. Alliant Reloder-26 delivers the highest muzzle velocity at 2,864 fps; across all powders the maximum-charge window runs from 1,631 fps to 2,864 fps. Accurate 3100 gives the best case fill at 100 %, and 92 of the 92 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 57–90 %, leaving at least 10 % headroom. The 250.0 gr projectile in 0.338" calls for a 1:16.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2213, ADI AR 2225 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. Alliant Reloder-26, Norma MRP, Vihtavuori N560 rank at the top here: for .340 Weath. Mag. with the .338 | 250gr | Alaska Bullet Works Kodiak PP SPBC 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.