Load Specifications
Bullet:.338 | 225gr | Woodleigh HS
Bullet Manufacturer:Woodleigh
Bullet Weight:225 gr
Bullet Diameter:0.338"
Bullet Length:<<locked>>
Caliber:.340 Weath. Mag. load data
Case Length (l3):2.825"
Cartridge Length (C.O.L.):<<locked>>
Case Capacity:100 Grains of Water
Primer Size:Large Rifle Magnum (LRM)
Barrel Length:26"
Max. allowed Pressure:63,817 psi
Recommended Twist Rate:1:15.5
Load data in caliber .340 Weath. Mag. with .338 | 225gr | Woodleigh HS bullet and 104 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 70, Accurate 4350 and Alliant Reloder-26.
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.
A valid access license is required to use the Personalized Load Calculator.
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>> | 84% | 57,203 psi | 90% | 2720 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 56,115 psi | 88% | 2753 fps | 99.1% |
| Accurate 3100ᴾ | <<locked>> | 100% | 52,011 psi | 82% | 2731 fps | 99.4% |
| Accurate 4064 | <<locked>> | 86% | 57,450 psi | 90% | 2772 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 54,259 psi | 85% | 2831 fps | 100% |
| ADI AR 2206H | <<locked>> | 82% | 56,347 psi | 88% | 2754 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 57,450 psi | 90% | 2758 fps | 100% |
| ADI AR 2209 | <<locked>> | 98% | 55,317 psi | 87% | 2820 fps | 98.1% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 54,056 psi | 85% | 2811 fps | 96.3% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 56,739 psi | 89% | 2879 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 54,694 psi | 86% | 2732 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 55,129 psi | 86% | 2754 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 54,940 psi | 86% | 2833 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 90% | 56,376 psi | 88% | 2859 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 54,433 psi | 85% | 2807 fps | 98% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 52,663 psi | 83% | 2808 fps | 97.7% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 48,965 psi | 77% | 2748 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 42,670 psi | 67% | 2668 fps | 98.7% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 56,478 psi | 89% | 2935 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 56,246 psi | 88% | 2772 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 47,340 psi | 74% | 2789 fps | 97.3% |
| Bofors RP3 | <<locked>> | 86% | 55,651 psi | 87% | 2750 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 51,634 psi | 81% | 2864 fps | 98.2% |
| Bofors RP7 | <<locked>> | 90% | 54,998 psi | 86% | 2732 fps | 98.8% |
| Hodgdon H380 | <<locked>> | 86% | 55,927 psi | 88% | 2764 fps | 100% |
| Hodgdon H414 | <<locked>> | 88% | 54,215 psi | 85% | 2796 fps | 99.1% |
| Hodgdon H4350 | <<locked>> | 92% | 54,781 psi | 86% | 2818 fps | 98.7% |
| Hodgdon H4831 SCᴾ | <<locked>> | 100% | 57,261 psi | 90% | 2798 fps | 96.3% |
| Hodgdon H4895 | <<locked>> | 82% | 56,971 psi | 89% | 2761 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 55,230 psi | 87% | 2760 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 57,450 psi | 90% | 2851 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 41,597 psi | 65% | 2749 fps | 96.3% |
| Hodgdon Superformance | <<locked>> | 92% | 56,811 psi | 89% | 2871 fps | 99.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,202 psi | 58% | 1694 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 57,130 psi | 90% | 2799 fps | 100% |
| IMR 3031 | <<locked>> | 84% | 56,507 psi | 89% | 2720 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 56,304 psi | 88% | 2779 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 88% | 55,332 psi | 87% | 2713 fps | 99.1% |
| IMR 4350 | <<locked>> | 94% | 55,753 psi | 87% | 2815 fps | 99.2% |
| IMR 4451 Enduron | <<locked>> | 90% | 56,710 psi | 89% | 2812 fps | 99.5% |
| IMR 4831 | <<locked>> | 98% | 55,463 psi | 87% | 2783 fps | 100% |
| IMR 4895 | <<locked>> | 84% | 56,594 psi | 89% | 2782 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 98% | 54,882 psi | 86% | 2802 fps | 96.9% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 55,201 psi | 87% | 2846 fps | 96.8% |
| Lovex D073.6 | <<locked>> | 82% | 56,913 psi | 89% | 2729 fps | 100% |
| Lovex S060 | <<locked>> | 82% | 55,288 psi | 87% | 2680 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 57,203 psi | 90% | 2736 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 56,724 psi | 89% | 2756 fps | 99.8% |
| Lovex S070 | <<locked>> | 92% | 54,462 psi | 85% | 2746 fps | 99.2% |
| Lovex S071ᴾ | <<locked>> | 100% | 43,627 psi | 68% | 2584 fps | 98% |
| Norma 201 | <<locked>> | 82% | 54,998 psi | 86% | 2695 fps | 100% |
| Norma 202 | <<locked>> | 82% | 55,738 psi | 87% | 2694 fps | 100% |
| Norma 203B | <<locked>> | 84% | 54,433 psi | 85% | 2742 fps | 100% |
| Norma 204 | <<locked>> | 94% | 56,666 psi | 89% | 2817 fps | 98.1% |
| Norma MRPᴾ | <<locked>> | 100% | 55,085 psi | 86% | 2892 fps | 99.3% |
| Norma URP | <<locked>> | 94% | 56,565 psi | 89% | 2817 fps | 100% |
| Ramshot Big Game | <<locked>> | 84% | 54,897 psi | 86% | 2763 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 55,477 psi | 87% | 2855 fps | 97.1% |
| Ramshot Hunter | <<locked>> | 94% | 55,419 psi | 87% | 2819 fps | 99.7% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 51,097 psi | 80% | 2770 fps | 98% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,014 psi | 60% | 1733 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 55,883 psi | 88% | 2749 fps | 99.5% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 55,956 psi | 88% | 2818 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 55,956 psi | 88% | 2853 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 57,725 psi | 90% | 2854 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 56,420 psi | 88% | 2886 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 42,221 psi | 66% | 2681 fps | 96.5% |
| Rottweil R 902 | <<locked>> | 84% | 55,825 psi | 87% | 2700 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 55,521 psi | 87% | 2742 fps | 100% |
| Rottweil R 904 | <<locked>> | 98% | 57,072 psi | 89% | 2791 fps | 97.3% |
| Rottweil R 905 | <<locked>> | 98% | 53,635 psi | 84% | 2793 fps | 98% |
| Rottweil R 907 | <<locked>> | 90% | 54,998 psi | 86% | 2732 fps | 98.8% |
| Shooters World Long Rifle | <<locked>> | 92% | 56,724 psi | 89% | 2756 fps | 99.8% |
| Shooters World Match Rifle | <<locked>> | 82% | 56,913 psi | 89% | 2729 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 57,203 psi | 90% | 2736 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 54,462 psi | 85% | 2795 fps | 99.5% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 57,232 psi | 90% | 2802 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 57,667 psi | 90% | 2761 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 54,795 psi | 86% | 2726 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 56,101 psi | 88% | 2631 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 56,753 psi | 89% | 2633 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 56,507 psi | 89% | 2712 fps | 99.3% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 56,971 psi | 89% | 2900 fps | 98.9% |
| Somchem S335 | <<locked>> | 82% | 55,579 psi | 87% | 2627 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 57,217 psi | 90% | 2745 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 55,666 psi | 87% | 2741 fps | 100% |
| Somchem S361 | <<locked>> | 96% | 55,172 psi | 86% | 2731 fps | 96.1% |
| Somchem S365 | <<locked>> | 96% | 55,782 psi | 87% | 2818 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 54,346 psi | 85% | 2771 fps | 98.7% |
| Unknown powder | <<locked>> | 92% | 57,290 psi | 90% | 2821 fps | 100% |
| Vihtavuori N133 | <<locked>> | 84% | 56,072 psi | 88% | 2610 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 56,072 psi | 88% | 2700 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 55,593 psi | 87% | 2667 fps | 100% |
| Vihtavuori N150 | <<locked>> | 94% | 57,130 psi | 90% | 2721 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 54,128 psi | 85% | 2741 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 49,864 psi | 78% | 2664 fps | 97.3% |
| Vihtavuori N540 | <<locked>> | 84% | 55,259 psi | 87% | 2692 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 54,607 psi | 86% | 2788 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 55,622 psi | 87% | 2823 fps | 100% |
| Vihtavuori N560ᴾ | <<locked>> | 100% | 52,547 psi | 82% | 2829 fps | 95.9% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 54,882 psi | 86% | 2733 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 54,215 psi | 85% | 2796 fps | 99.1% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 44,425 psi | 70% | 2799 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 56,478 psi | 89% | 2793 fps | 98.2% |
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% | 50,140 psi | 79% | 2625 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 43,207 psi | 68% | 2539 fps | 96.9% |
| Accurate 3100 | <<locked>> | 88% | 34,505 psi | 54% | 2408 fps | 95.5% |
| Accurate 4064 | <<locked>> | 80% | 47,485 psi | 74% | 2631 fps | 100% |
| Accurate 4350 | 65.7 gr | 80% | 36,085 psi | 57% | 2507 fps | 98.4% |
| ADI AR 2206H | <<locked>> | 80% | 53,040 psi | 83% | 2704 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 44,947 psi | 70% | 2561 fps | 99.7% |
| ADI AR 2209 | <<locked>> | 90% | 42,728 psi | 67% | 2597 fps | 95.1% |
| ADI AR 2213 | <<locked>> | 98% | 49,487 psi | 78% | 2750 fps | 95.4% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 49,327 psi | 77% | 2765 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 45,397 psi | 71% | 2586 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 48,544 psi | 76% | 2653 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 80% | 35,375 psi | 55% | 2465 fps | 97.9% |
| Alliant Reloder-17 | <<locked>> | 80% | 39,842 psi | 62% | 2586 fps | 99.8% |
| Alliant Reloder-19 | <<locked>> | 90% | 42,293 psi | 66% | 2592 fps | 95.1% |
| Alliant Reloder-22 | <<locked>> | 94% | 42,308 psi | 66% | 2636 fps | 95.3% |
| Alliant Reloder-23 | <<locked>> | 80% | 25,788 psi | 40% | 2224 fps | 95.2% |
| Alliant Reloder-25 | <<locked>> | 92% | 33,098 psi | 52% | 2445 fps | 95.3% |
| Alliant Reloder-26 | 74.1 gr | 84% | 31,386 psi | 49% | 2444 fps | 95.6% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 52,765 psi | 83% | 2720 fps | 100% |
| Bofors RP15 | <<locked>> | 96% | 41,582 psi | 65% | 2677 fps | 95.7% |
| Bofors RP3 | <<locked>> | 80% | 45,658 psi | 72% | 2597 fps | 100% |
| Bofors RP5 | <<locked>> | 92% | 39,595 psi | 62% | 2635 fps | 95.2% |
| Bofors RP7 | <<locked>> | 80% | 40,393 psi | 63% | 2473 fps | 95.7% |
| Hodgdon H380 | <<locked>> | 80% | 46,006 psi | 72% | 2605 fps | 99.3% |
| Hodgdon H414 | <<locked>> | 80% | 41,191 psi | 65% | 2565 fps | 96.6% |
| Hodgdon H4350 | <<locked>> | 82% | 40,089 psi | 63% | 2552 fps | 95.5% |
| Hodgdon H4831 SC | <<locked>> | 98% | 51,924 psi | 81% | 2739 fps | 95.4% |
| Hodgdon H4895 | <<locked>> | 80% | 53,606 psi | 84% | 2713 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 32,793 psi | 51% | 2363 fps | 98.4% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 47,268 psi | 74% | 2700 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 39,102 psi | 61% | 2690 fps | 95.3% |
| Hodgdon Superformance | <<locked>> | 82% | 39,610 psi | 62% | 2563 fps | 95.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,093 psi | 42% | 1510 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 47,442 psi | 74% | 2651 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 49,792 psi | 78% | 2629 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 44,208 psi | 69% | 2585 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 80% | 43,526 psi | 68% | 2511 fps | 97.2% |
| IMR 4350 | <<locked>> | 82% | 38,305 psi | 60% | 2503 fps | 95.8% |
| IMR 4451 Enduron | <<locked>> | 80% | 41,698 psi | 65% | 2552 fps | 97.2% |
| IMR 4831 | <<locked>> | 80% | 31,560 psi | 49% | 2334 fps | 96.3% |
| IMR 4895 | <<locked>> | 80% | 49,792 psi | 78% | 2679 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 48,399 psi | 76% | 2697 fps | 95.5% |
| IMR 7828 SSC | <<locked>> | 96% | 47,369 psi | 74% | 2725 fps | 95% |
| Lovex D073.6 | <<locked>> | 80% | 53,258 psi | 83% | 2679 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 52,025 psi | 82% | 2633 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 47,572 psi | 75% | 2594 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 39,189 psi | 61% | 2454 fps | 97.4% |
| Lovex S070 | <<locked>> | 80% | 37,536 psi | 59% | 2436 fps | 95.7% |
| Lovex S071 | <<locked>> | 92% | 33,402 psi | 52% | 2382 fps | 95.1% |
| Norma 201 | <<locked>> | 80% | 51,735 psi | 81% | 2648 fps | 100% |
| Norma 202 | <<locked>> | 80% | 52,431 psi | 82% | 2648 fps | 100% |
| Norma 203B | <<locked>> | 80% | 47,906 psi | 75% | 2639 fps | 100% |
| Norma 204 | <<locked>> | 86% | 43,221 psi | 68% | 2590 fps | 95.2% |
| Norma MRP | <<locked>> | 90% | 38,885 psi | 61% | 2595 fps | 95.7% |
| Norma URP | <<locked>> | 80% | 36,013 psi | 56% | 2451 fps | 97.6% |
| Ramshot Big Game | <<locked>> | 80% | 47,935 psi | 75% | 2657 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 46,601 psi | 73% | 2721 fps | 95.1% |
| Ramshot Hunter | <<locked>> | 80% | 34,809 psi | 55% | 2434 fps | 95.4% |
| Ramshot Magnum | <<locked>> | 94% | 40,321 psi | 63% | 2579 fps | 95.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,688 psi | 43% | 1549 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 46,064 psi | 72% | 2589 fps | 98.3% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 52,257 psi | 82% | 2764 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 42,380 psi | 66% | 2640 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 35,679 psi | 56% | 2470 fps | 97.4% |
| ReloadSwiss RS 70 | 69.9 gr | 80% | 34,780 psi | 55% | 2471 fps | 96.5% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 38,711 psi | 61% | 2617 fps | 95.4% |
| Rottweil R 902 | <<locked>> | 80% | 49,356 psi | 77% | 2604 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 43,033 psi | 67% | 2546 fps | 99.9% |
| Rottweil R 904 | <<locked>> | 92% | 47,108 psi | 74% | 2630 fps | 95.1% |
| Rottweil R 905 | <<locked>> | 90% | 41,205 psi | 65% | 2572 fps | 95% |
| Rottweil R 907 | <<locked>> | 80% | 40,393 psi | 63% | 2473 fps | 95.7% |
| Shooters World Long Rifle | <<locked>> | 80% | 39,189 psi | 61% | 2454 fps | 97.4% |
| Shooters World Match Rifle | <<locked>> | 80% | 53,258 psi | 83% | 2679 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 47,572 psi | 75% | 2594 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 37,536 psi | 59% | 2487 fps | 96.4% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 43,976 psi | 69% | 2595 fps | 99.8% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 53,795 psi | 84% | 2706 fps | 99.9% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 51,401 psi | 81% | 2675 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 52,663 psi | 83% | 2585 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 44,425 psi | 70% | 2461 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 38,392 psi | 60% | 2400 fps | 95.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 40,814 psi | 64% | 2621 fps | 95.6% |
| Somchem S335 | <<locked>> | 80% | 52,315 psi | 82% | 2584 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 53,679 psi | 84% | 2695 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 43,279 psi | 68% | 2543 fps | 99.9% |
| Somchem S361 | <<locked>> | 94% | 51,764 psi | 81% | 2678 fps | 95.3% |
| Somchem S365 | <<locked>> | 80% | 32,401 psi | 51% | 2409 fps | 99.4% |
| Somchem S385 | <<locked>> | 88% | 39,233 psi | 61% | 2504 fps | 95.3% |
| Unknown powder | <<locked>> | 80% | 38,827 psi | 61% | 2505 fps | 97.8% |
| Vihtavuori N133 | <<locked>> | 80% | 49,850 psi | 78% | 2527 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 49,545 psi | 78% | 2615 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 49,110 psi | 77% | 2577 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 37,231 psi | 58% | 2401 fps | 99.9% |
| Vihtavuori N160 | <<locked>> | 80% | 38,783 psi | 61% | 2478 fps | 98.3% |
| Vihtavuori N165 | <<locked>> | 94% | 39,784 psi | 62% | 2506 fps | 95% |
| Vihtavuori N540 | <<locked>> | 80% | 48,762 psi | 76% | 2599 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 39,407 psi | 62% | 2521 fps | 98.3% |
| Vihtavuori N555 | <<locked>> | 80% | 28,253 psi | 44% | 2300 fps | 95.5% |
| Vihtavuori N560 | <<locked>> | 98% | 48,646 psi | 76% | 2769 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 36,564 psi | 57% | 2425 fps | 99.4% |
| Winchester 760 | <<locked>> | 80% | 41,191 psi | 65% | 2565 fps | 96.6% |
| Winchester StaBALL HD | <<locked>> | 84% | 25,918 psi | 41% | 2307 fps | 96% |
| Winchester Supreme 780 | <<locked>> | 90% | 42,467 psi | 67% | 2563 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 111 powders for .340 Weath. Mag. loaded with the .338 | 225gr | Woodleigh HS. Alliant Reloder-26 delivers the highest muzzle velocity at 2,935 fps; across all powders the maximum-charge window runs from 1,694 fps to 2,935 fps. Accurate 3100 gives the best case fill at 100 %, and 111 of the 111 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 54–90 %, leaving at least 10 % headroom. The 225.0 gr projectile in 0.338" calls for a 1:15.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate MAGPRO, ADI AR 2213 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 70, Accurate 4350, Alliant Reloder-26 rank at the top here: for .340 Weath. Mag. with the .338 | 225gr | Woodleigh HS they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate MAGPRO, ADI AR 2225, Baschieri & Pellagri 109 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.