Load Specifications
Bullet Manufacturer:Nosler
Bullet Weight:230 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:1:14.5
Load data in caliber .340 Weath. Mag. with .338 | 230gr | Nosler CT FailSafe bullet and 106 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 60, ReloadSwiss RS 70 and Hodgdon H414.
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% | 56,710 psi | 89% | 2674 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 54,491 psi | 85% | 2697 fps | 98.9% |
| Accurate 3100ᴾ | <<locked>> | 100% | 51,445 psi | 81% | 2740 fps | 99.6% |
| Accurate 4064 | <<locked>> | 86% | 57,043 psi | 89% | 2730 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 57,653 psi | 90% | 2838 fps | 100% |
| Accurate MAGPROᴾ | <<locked>> | 100% | 53,200 psi | 83% | 2874 fps | 96.3% |
| ADI AR 2206H | <<locked>> | 82% | 56,115 psi | 88% | 2759 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 57,116 psi | 90% | 2762 fps | 100% |
| ADI AR 2209 | <<locked>> | 98% | 54,723 psi | 86% | 2828 fps | 98.5% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 52,373 psi | 82% | 2818 fps | 96.9% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 56,492 psi | 89% | 2887 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 54,302 psi | 85% | 2736 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 54,723 psi | 86% | 2759 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 54,607 psi | 86% | 2841 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 90% | 55,854 psi | 88% | 2867 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 57,653 psi | 90% | 2871 fps | 98.9% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 51,010 psi | 80% | 2818 fps | 98.2% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 48,138 psi | 75% | 2756 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 42,061 psi | 66% | 2684 fps | 99.1% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 55,274 psi | 87% | 2946 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 56,028 psi | 88% | 2779 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 46,876 psi | 73% | 2746 fps | 97.3% |
| Bofors RP3 | <<locked>> | 86% | 55,114 psi | 86% | 2753 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 51,010 psi | 80% | 2818 fps | 98.2% |
| Bofors RP7 | <<locked>> | 90% | 54,578 psi | 86% | 2740 fps | 99.1% |
| Hodgdon H380 | <<locked>> | 86% | 55,695 psi | 87% | 2772 fps | 100% |
| Hodgdon H414 | <<locked>> | 92% | 56,144 psi | 88% | 2838 fps | 99.6% |
| Hodgdon H4350 | <<locked>> | 90% | 56,130 psi | 88% | 2799 fps | 98.9% |
| Hodgdon H4831ᴾ | <<locked>> | 100% | 56,376 psi | 88% | 2825 fps | 97.1% |
| Hodgdon H4831 SCᴾ | <<locked>> | 100% | 54,969 psi | 86% | 2805 fps | 96.8% |
| Hodgdon H4895 | <<locked>> | 82% | 56,724 psi | 89% | 2766 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 54,926 psi | 86% | 2766 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 56,927 psi | 89% | 2805 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 41,220 psi | 65% | 2707 fps | 96.3% |
| Hodgdon Superformance | <<locked>> | 92% | 56,333 psi | 88% | 2881 fps | 99.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,347 psi | 57% | 1690 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 57,580 psi | 90% | 2766 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 57,450 psi | 90% | 2740 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 56,536 psi | 89% | 2743 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 55,825 psi | 87% | 2733 fps | 99.5% |
| IMR 4350 | <<locked>> | 94% | 55,463 psi | 87% | 2772 fps | 99.2% |
| IMR 4451 Enduron | <<locked>> | 90% | 56,289 psi | 88% | 2766 fps | 99.5% |
| IMR 4831 | <<locked>> | 94% | 54,288 psi | 85% | 2779 fps | 100% |
| IMR 4895 | <<locked>> | 84% | 56,173 psi | 88% | 2785 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 98% | 54,331 psi | 85% | 2759 fps | 96.9% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 49,879 psi | 78% | 2792 fps | 96.5% |
| Lovex D073.6 | <<locked>> | 82% | 56,507 psi | 89% | 2730 fps | 100% |
| Lovex S060 | <<locked>> | 82% | 54,984 psi | 86% | 2684 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 56,840 psi | 89% | 2736 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 56,347 psi | 88% | 2762 fps | 99.9% |
| Lovex S070 | <<locked>> | 94% | 57,609 psi | 90% | 2805 fps | 99.7% |
| Lovex S071ᴾ | <<locked>> | 100% | 42,699 psi | 67% | 2595 fps | 98.5% |
| Norma 201 | <<locked>> | 82% | 54,694 psi | 86% | 2700 fps | 100% |
| Norma 202 | <<locked>> | 82% | 55,463 psi | 87% | 2697 fps | 100% |
| Norma 203B | <<locked>> | 86% | 57,508 psi | 90% | 2795 fps | 100% |
| Norma 204 | <<locked>> | 94% | 56,072 psi | 88% | 2825 fps | 98.6% |
| Norma MRPᴾ | <<locked>> | 100% | 54,302 psi | 85% | 2904 fps | 99.6% |
| Norma URP | <<locked>> | 94% | 56,246 psi | 88% | 2825 fps | 100% |
| Ramshot Big Game | <<locked>> | 84% | 54,679 psi | 86% | 2772 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 50,154 psi | 79% | 2808 fps | 96.9% |
| Ramshot Hunter | <<locked>> | 94% | 54,839 psi | 86% | 2825 fps | 99.8% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 44,512 psi | 70% | 2684 fps | 97.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,956 psi | 58% | 1729 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 55,477 psi | 87% | 2753 fps | 99.7% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 55,535 psi | 87% | 2825 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 55,347 psi | 87% | 2858 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 57,406 psi | 90% | 2864 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 55,927 psi | 88% | 2894 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 41,002 psi | 64% | 2700 fps | 97.4% |
| Rottweil R 902 | <<locked>> | 84% | 55,506 psi | 87% | 2703 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 55,187 psi | 86% | 2746 fps | 100% |
| Rottweil R 904 | <<locked>> | 98% | 56,710 psi | 89% | 2802 fps | 97.8% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 56,927 psi | 89% | 2858 fps | 99% |
| Rottweil R 907 | <<locked>> | 90% | 54,578 psi | 86% | 2740 fps | 99.1% |
| Shooters World Long Rifle | <<locked>> | 92% | 56,347 psi | 88% | 2762 fps | 99.9% |
| Shooters World Match Rifle | <<locked>> | 82% | 56,507 psi | 89% | 2730 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 56,840 psi | 89% | 2736 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 57,609 psi | 90% | 2805 fps | 99.7% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 56,826 psi | 89% | 2808 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 57,159 psi | 90% | 2766 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 54,447 psi | 85% | 2730 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 55,680 psi | 87% | 2631 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 56,362 psi | 88% | 2631 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 56,028 psi | 88% | 2717 fps | 99.5% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 56,420 psi | 88% | 2854 fps | 98.9% |
| Somchem S335 | <<locked>> | 82% | 55,230 psi | 87% | 2628 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 57,000 psi | 89% | 2753 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 55,143 psi | 86% | 2743 fps | 100% |
| Somchem S361 | <<locked>> | 96% | 54,839 psi | 86% | 2743 fps | 96.7% |
| Somchem S365 | <<locked>> | 96% | 55,303 psi | 87% | 2825 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 57,406 psi | 90% | 2831 fps | 99.4% |
| Vihtavuori N133 | <<locked>> | 82% | 56,173 psi | 88% | 2612 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 55,680 psi | 87% | 2657 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 55,927 psi | 88% | 2674 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 56,565 psi | 89% | 2720 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 54,868 psi | 86% | 2766 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 49,690 psi | 78% | 2703 fps | 98.2% |
| Vihtavuori N540 | <<locked>> | 86% | 57,725 psi | 90% | 2723 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 57,392 psi | 90% | 2822 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 53,983 psi | 85% | 2828 fps | 100% |
| Vihtavuori N560ᴾ | <<locked>> | 100% | 54,795 psi | 86% | 2894 fps | 97.2% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 54,375 psi | 85% | 2736 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 56,362 psi | 88% | 2841 fps | 99.6% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 43,482 psi | 68% | 2812 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 54,433 psi | 85% | 2740 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 53,983 psi | 85% | 2776 fps | 98.3% |
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% | 49,951 psi | 78% | 2585 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 47,703 psi | 75% | 2589 fps | 97.9% |
| Accurate 3100 | <<locked>> | 86% | 32,053 psi | 50% | 2372 fps | 95.5% |
| Accurate 4064 | <<locked>> | 80% | 47,297 psi | 74% | 2595 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 35,795 psi | 56% | 2470 fps | 98.4% |
| Accurate MAGPRO | <<locked>> | 98% | 49,559 psi | 78% | 2812 fps | 95.4% |
| ADI AR 2206H | <<locked>> | 80% | 52,736 psi | 83% | 2710 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 44,759 psi | 70% | 2569 fps | 99.9% |
| ADI AR 2209 | <<locked>> | 90% | 42,395 psi | 66% | 2612 fps | 95.8% |
| ADI AR 2213 | <<locked>> | 96% | 45,963 psi | 72% | 2703 fps | 95.3% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 48,979 psi | 77% | 2772 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 45,078 psi | 71% | 2592 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 48,240 psi | 76% | 2661 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 35,099 psi | 55% | 2480 fps | 98.5% |
| Alliant Reloder-17 | <<locked>> | 80% | 39,537 psi | 62% | 2598 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 39,407 psi | 62% | 2552 fps | 95% |
| Alliant Reloder-22 | <<locked>> | 92% | 39,349 psi | 62% | 2598 fps | 95.2% |
| Alliant Reloder-23 | <<locked>> | 80% | 25,686 psi | 40% | 2247 fps | 96.3% |
| Alliant Reloder-25 | <<locked>> | 90% | 30,893 psi | 48% | 2411 fps | 95.3% |
| Alliant Reloder-26 | <<locked>> | 82% | 29,051 psi | 46% | 2405 fps | 95.4% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 52,257 psi | 82% | 2726 fps | 100% |
| Bofors RP15 | <<locked>> | 96% | 41,191 psi | 65% | 2635 fps | 95.7% |
| Bofors RP3 | <<locked>> | 80% | 45,368 psi | 71% | 2605 fps | 100% |
| Bofors RP5 | <<locked>> | 92% | 39,349 psi | 62% | 2598 fps | 95.2% |
| Bofors RP7 | <<locked>> | 80% | 40,074 psi | 63% | 2484 fps | 96.4% |
| Hodgdon H380 | <<locked>> | 80% | 45,788 psi | 72% | 2615 fps | 99.6% |
| Hodgdon H414 | 65.7 gr | 80% | 37,666 psi | 59% | 2510 fps | 96.4% |
| Hodgdon H4350 | <<locked>> | 80% | 40,799 psi | 64% | 2533 fps | 95.8% |
| Hodgdon H4831 | <<locked>> | 96% | 49,182 psi | 77% | 2713 fps | 95.6% |
| Hodgdon H4831 SC | <<locked>> | 96% | 48,182 psi | 76% | 2694 fps | 95.3% |
| Hodgdon H4895 | <<locked>> | 80% | 53,287 psi | 84% | 2717 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 32,619 psi | 51% | 2379 fps | 99% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 49,705 psi | 78% | 2700 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 38,725 psi | 61% | 2648 fps | 95.2% |
| Hodgdon Superformance | <<locked>> | 80% | 36,608 psi | 57% | 2520 fps | 95.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,151 psi | 43% | 1506 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 50,966 psi | 80% | 2671 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 53,809 psi | 84% | 2694 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 47,079 psi | 74% | 2602 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 49,342 psi | 77% | 2631 fps | 98.8% |
| IMR 4350 | <<locked>> | 80% | 35,737 psi | 56% | 2415 fps | 95% |
| IMR 4451 Enduron | <<locked>> | 80% | 41,466 psi | 65% | 2513 fps | 97.2% |
| IMR 4831 | <<locked>> | 80% | 34,374 psi | 54% | 2425 fps | 98.1% |
| IMR 4895 | <<locked>> | 80% | 49,487 psi | 78% | 2687 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 48,153 psi | 75% | 2657 fps | 95.5% |
| IMR 7828 SSC | <<locked>> | 98% | 46,717 psi | 73% | 2736 fps | 95.7% |
| Lovex D073.6 | <<locked>> | 80% | 52,794 psi | 83% | 2680 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 51,663 psi | 81% | 2635 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 47,210 psi | 74% | 2598 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 39,044 psi | 61% | 2467 fps | 97.9% |
| Lovex S070 | <<locked>> | 80% | 37,246 psi | 58% | 2448 fps | 96.4% |
| Lovex S071 | <<locked>> | 90% | 31,125 psi | 49% | 2349 fps | 95.1% |
| Norma 201 | <<locked>> | 80% | 51,561 psi | 81% | 2654 fps | 100% |
| Norma 202 | <<locked>> | 80% | 52,054 psi | 82% | 2651 fps | 100% |
| Norma 203B | <<locked>> | 80% | 47,601 psi | 75% | 2648 fps | 100% |
| Norma 204 | <<locked>> | 84% | 40,147 psi | 63% | 2546 fps | 95% |
| Norma MRP | <<locked>> | 88% | 35,940 psi | 56% | 2552 fps | 95.6% |
| Norma URP | <<locked>> | 80% | 35,708 psi | 56% | 2467 fps | 98.3% |
| Ramshot Big Game | <<locked>> | 80% | 47,572 psi | 75% | 2664 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 43,395 psi | 68% | 2680 fps | 95% |
| Ramshot Hunter | <<locked>> | 80% | 34,606 psi | 54% | 2451 fps | 96.3% |
| Ramshot Magnum | <<locked>> | 96% | 38,522 psi | 60% | 2562 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,615 psi | 43% | 1542 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 45,701 psi | 72% | 2598 fps | 98.7% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 51,996 psi | 81% | 2772 fps | 100% |
| ReloadSwiss RS 60 | 67.2 gr | 80% | 42,003 psi | 66% | 2648 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 35,375 psi | 55% | 2484 fps | 98% |
| ReloadSwiss RS 70 | 68.2 gr | 80% | 34,534 psi | 54% | 2487 fps | 97.3% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 35,650 psi | 56% | 2569 fps | 95.1% |
| Rottweil R 902 | <<locked>> | 80% | 49,124 psi | 77% | 2608 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 42,728 psi | 67% | 2556 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 44,048 psi | 69% | 2592 fps | 95.1% |
| Rottweil R 905 | <<locked>> | 90% | 40,828 psi | 64% | 2585 fps | 95.8% |
| Rottweil R 907 | <<locked>> | 80% | 40,074 psi | 63% | 2484 fps | 96.4% |
| Shooters World Long Rifle | <<locked>> | 80% | 39,044 psi | 61% | 2467 fps | 97.9% |
| Shooters World Match Rifle | <<locked>> | 80% | 52,794 psi | 83% | 2680 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 47,210 psi | 74% | 2598 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 37,246 psi | 58% | 2448 fps | 96.4% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 43,772 psi | 69% | 2608 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 53,432 psi | 84% | 2713 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 51,169 psi | 80% | 2684 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 52,431 psi | 82% | 2589 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 44,222 psi | 69% | 2464 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 38,145 psi | 60% | 2411 fps | 96.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 40,437 psi | 63% | 2582 fps | 95.6% |
| Somchem S335 | <<locked>> | 80% | 52,141 psi | 82% | 2585 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 53,127 psi | 83% | 2697 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 43,105 psi | 68% | 2556 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 48,080 psi | 75% | 2635 fps | 95.2% |
| Somchem S365 | <<locked>> | 80% | 32,126 psi | 50% | 2425 fps | 99.7% |
| Somchem S385 | <<locked>> | 86% | 36,434 psi | 57% | 2467 fps | 95.2% |
| Vihtavuori N133 | <<locked>> | 80% | 52,939 psi | 83% | 2569 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 49,269 psi | 77% | 2572 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 49,487 psi | 78% | 2589 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 41,118 psi | 64% | 2487 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 37,086 psi | 58% | 2464 fps | 98.5% |
| Vihtavuori N165 | <<locked>> | 92% | 38,290 psi | 60% | 2497 fps | 95.4% |
| Vihtavuori N540 | <<locked>> | 80% | 47,776 psi | 75% | 2585 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 36,579 psi | 57% | 2467 fps | 98.2% |
| Vihtavuori N555 | <<locked>> | 80% | 27,963 psi | 44% | 2320 fps | 96.4% |
| Vihtavuori N560 | <<locked>> | 96% | 47,718 psi | 75% | 2772 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 36,201 psi | 57% | 2434 fps | 99.7% |
| Winchester 760 | <<locked>> | 80% | 37,797 psi | 59% | 2513 fps | 96.4% |
| Winchester StaBALL HD | <<locked>> | 82% | 24,105 psi | 38% | 2270 fps | 95.9% |
| Winchester StaBALL Match | <<locked>> | 80% | 50,923 psi | 80% | 2687 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 41,060 psi | 64% | 2556 fps | 95.5% |
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 106 powders for .340 Weath. Mag. loaded with the .338 | 230gr | Nosler CT FailSafe. Alliant Reloder-26 delivers the highest muzzle velocity at 2,946 fps; across all powders the maximum-charge window runs from 1,690 fps to 2,946 fps. Accurate 3100 gives the best case fill at 100 %, and 106 of the 106 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 230.0 gr projectile in 0.338" calls for a 1:14.5 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 60, ReloadSwiss RS 70, Hodgdon H414 rank at the top here: for .340 Weath. Mag. with the .338 | 230gr | Nosler CT FailSafe 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.