Load Specifications
Bullet Manufacturer:Hornady
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:1:16.5
Load data in caliber .340 Weath. Mag. with .338 | 225gr | Hornady InterLock bullet and 108 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% | 55,854 psi | 88% | 2713 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 54,143 psi | 85% | 2740 fps | 98.9% |
| Accurate 3100ᴾ | <<locked>> | 100% | 50,894 psi | 80% | 2776 fps | 99.6% |
| Accurate 4064 | <<locked>> | 86% | 56,188 psi | 88% | 2766 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 57,014 psi | 89% | 2877 fps | 100% |
| Accurate High Countryᴾ | <<locked>> | 100% | 55,985 psi | 88% | 2979 fps | 98.1% |
| Accurate MAGPROᴾ | <<locked>> | 100% | 53,026 psi | 83% | 2913 fps | 96.3% |
| ADI AR 2206H | <<locked>> | 82% | 55,666 psi | 87% | 2799 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 56,840 psi | 89% | 2805 fps | 100% |
| ADI AR 2209 | <<locked>> | 98% | 54,679 psi | 86% | 2874 fps | 98.5% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 52,315 psi | 82% | 2864 fps | 96.9% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 56,275 psi | 88% | 2933 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 54,795 psi | 86% | 2871 fps | 98.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 57,580 psi | 90% | 2828 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 54,375 psi | 85% | 2802 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 54,404 psi | 85% | 2884 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 90% | 55,767 psi | 87% | 2910 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 57,508 psi | 90% | 2917 fps | 98.9% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 50,850 psi | 80% | 2861 fps | 98.2% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 47,935 psi | 75% | 2795 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 41,843 psi | 66% | 2723 fps | 99.1% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 55,085 psi | 86% | 2989 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 55,738 psi | 87% | 2822 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 46,572 psi | 73% | 2785 fps | 97.2% |
| Bofors RP3 | <<locked>> | 86% | 54,621 psi | 86% | 2792 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 50,850 psi | 80% | 2861 fps | 98.2% |
| Bofors RP7 | <<locked>> | 90% | 54,389 psi | 85% | 2782 fps | 99.1% |
| Hodgdon H380 | <<locked>> | 86% | 55,288 psi | 87% | 2815 fps | 100% |
| Hodgdon H414 | <<locked>> | 92% | 55,941 psi | 88% | 2884 fps | 99.6% |
| Hodgdon H4350 | <<locked>> | 90% | 55,767 psi | 87% | 2841 fps | 98.9% |
| Hodgdon H4831ᴾ | <<locked>> | 100% | 56,333 psi | 88% | 2871 fps | 97.1% |
| Hodgdon H4831 SCᴾ | <<locked>> | 100% | 54,955 psi | 86% | 2851 fps | 96.8% |
| Hodgdon H4895 | <<locked>> | 82% | 56,275 psi | 88% | 2808 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 54,592 psi | 86% | 2805 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 56,681 psi | 89% | 2848 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 40,930 psi | 64% | 2746 fps | 96.2% |
| Hodgdon Superformance | <<locked>> | 92% | 56,289 psi | 88% | 2923 fps | 99.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,158 psi | 57% | 1719 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 57,392 psi | 90% | 2808 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 56,942 psi | 89% | 2779 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 56,318 psi | 88% | 2789 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 55,564 psi | 87% | 2776 fps | 99.5% |
| IMR 4350 | <<locked>> | 94% | 55,187 psi | 86% | 2815 fps | 99.2% |
| IMR 4451 Enduron | <<locked>> | 90% | 55,999 psi | 88% | 2808 fps | 99.5% |
| IMR 4831 | <<locked>> | 96% | 57,580 psi | 90% | 2871 fps | 100% |
| IMR 4895 | <<locked>> | 84% | 55,782 psi | 87% | 2828 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 98% | 54,259 psi | 85% | 2802 fps | 96.9% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 49,792 psi | 78% | 2835 fps | 96.5% |
| Lovex D073.6 | <<locked>> | 82% | 55,956 psi | 88% | 2769 fps | 100% |
| Lovex S060 | <<locked>> | 82% | 54,723 psi | 86% | 2726 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 56,391 psi | 88% | 2779 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 55,825 psi | 87% | 2802 fps | 99.9% |
| Lovex S070 | <<locked>> | 94% | 57,145 psi | 90% | 2844 fps | 99.7% |
| Lovex S071ᴾ | <<locked>> | 100% | 42,061 psi | 66% | 2628 fps | 98.4% |
| Norma 201 | <<locked>> | 82% | 54,172 psi | 85% | 2740 fps | 100% |
| Norma 202 | <<locked>> | 82% | 55,027 psi | 86% | 2736 fps | 100% |
| Norma 203B | <<locked>> | 86% | 57,043 psi | 89% | 2835 fps | 100% |
| Norma 204 | <<locked>> | 94% | 56,028 psi | 88% | 2867 fps | 98.6% |
| Norma MRPᴾ | <<locked>> | 100% | 54,056 psi | 85% | 2943 fps | 99.5% |
| Norma URP | <<locked>> | 94% | 55,912 psi | 88% | 2867 fps | 100% |
| Ramshot Big Game | <<locked>> | 84% | 54,302 psi | 85% | 2815 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 49,864 psi | 78% | 2848 fps | 96.9% |
| Ramshot Hunter | <<locked>> | 94% | 54,752 psi | 86% | 2871 fps | 99.8% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 44,193 psi | 69% | 2723 fps | 97.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,695 psi | 57% | 1759 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 55,288 psi | 87% | 2799 fps | 99.7% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 55,201 psi | 87% | 2864 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 55,187 psi | 86% | 2900 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 57,188 psi | 90% | 2907 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 55,753 psi | 87% | 2936 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 40,596 psi | 64% | 2733 fps | 97.3% |
| Rottweil R 902 | <<locked>> | 84% | 54,984 psi | 86% | 2743 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 54,723 psi | 86% | 2789 fps | 100% |
| Rottweil R 904 | <<locked>> | 98% | 56,492 psi | 89% | 2844 fps | 97.8% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 56,724 psi | 89% | 2900 fps | 98.9% |
| Rottweil R 907 | <<locked>> | 90% | 54,389 psi | 85% | 2782 fps | 99.1% |
| Shooters World Long Rifle | <<locked>> | 92% | 55,825 psi | 87% | 2802 fps | 99.9% |
| Shooters World Match Rifle | <<locked>> | 82% | 55,956 psi | 88% | 2769 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 56,391 psi | 88% | 2779 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 57,145 psi | 90% | 2844 fps | 99.7% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 56,652 psi | 89% | 2851 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 56,971 psi | 89% | 2808 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 57,696 psi | 90% | 2822 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 55,259 psi | 87% | 2671 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 56,130 psi | 88% | 2674 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 55,825 psi | 87% | 2759 fps | 99.5% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 56,231 psi | 88% | 2897 fps | 98.9% |
| Somchem S335 | <<locked>> | 82% | 54,824 psi | 86% | 2667 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 56,695 psi | 89% | 2792 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 54,795 psi | 86% | 2785 fps | 100% |
| Somchem S361 | <<locked>> | 96% | 54,636 psi | 86% | 2782 fps | 96.7% |
| Somchem S365 | <<locked>> | 96% | 55,013 psi | 86% | 2864 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 57,246 psi | 90% | 2874 fps | 99.4% |
| Vihtavuori N133 | <<locked>> | 82% | 55,854 psi | 88% | 2654 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 55,303 psi | 87% | 2700 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 55,637 psi | 87% | 2717 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 56,144 psi | 88% | 2759 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 54,592 psi | 86% | 2808 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 49,414 psi | 77% | 2743 fps | 98.2% |
| Vihtavuori N540 | <<locked>> | 86% | 57,406 psi | 90% | 2762 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 57,101 psi | 89% | 2864 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 53,650 psi | 84% | 2871 fps | 100% |
| Vihtavuori N560ᴾ | <<locked>> | 100% | 54,534 psi | 85% | 2933 fps | 97.2% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 54,259 psi | 85% | 2779 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 56,159 psi | 88% | 2887 fps | 99.6% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 43,091 psi | 68% | 2848 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 54,215 psi | 85% | 2779 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 53,882 psi | 84% | 2818 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% | 48,834 psi | 77% | 2618 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 47,297 psi | 74% | 2628 fps | 97.8% |
| Accurate 3100 | <<locked>> | 86% | 31,183 psi | 49% | 2392 fps | 95.1% |
| Accurate 4064 | <<locked>> | 80% | 46,267 psi | 73% | 2625 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 34,896 psi | 55% | 2490 fps | 98.1% |
| Accurate High Country | <<locked>> | 94% | 45,194 psi | 71% | 2792 fps | 95.8% |
| Accurate MAGPRO | <<locked>> | 98% | 49,443 psi | 77% | 2854 fps | 95.4% |
| ADI AR 2206H | <<locked>> | 80% | 52,112 psi | 82% | 2749 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 44,353 psi | 70% | 2608 fps | 99.8% |
| ADI AR 2209 | <<locked>> | 90% | 41,974 psi | 66% | 2644 fps | 95.7% |
| ADI AR 2213 | <<locked>> | 96% | 45,745 psi | 72% | 2746 fps | 95.2% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 48,849 psi | 77% | 2818 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 88% | 39,421 psi | 62% | 2592 fps | 95% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 44,657 psi | 70% | 2631 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 47,630 psi | 75% | 2697 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 34,577 psi | 54% | 2510 fps | 98.3% |
| Alliant Reloder-17 | <<locked>> | 80% | 39,117 psi | 61% | 2631 fps | 99.9% |
| Alliant Reloder-19 | <<locked>> | 90% | 41,510 psi | 65% | 2641 fps | 95.7% |
| Alliant Reloder-22 | <<locked>> | 92% | 38,856 psi | 61% | 2628 fps | 95% |
| Alliant Reloder-23 | <<locked>> | 80% | 24,990 psi | 39% | 2264 fps | 95.8% |
| Alliant Reloder-25 | <<locked>> | 92% | 32,358 psi | 51% | 2493 fps | 96% |
| Alliant Reloder-26 | <<locked>> | 82% | 28,413 psi | 45% | 2425 fps | 95% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 52,054 psi | 82% | 2766 fps | 100% |
| Bofors RP15 | <<locked>> | 96% | 40,828 psi | 64% | 2671 fps | 95.5% |
| Bofors RP3 | <<locked>> | 80% | 44,672 psi | 70% | 2641 fps | 100% |
| Bofors RP5 | <<locked>> | 92% | 38,856 psi | 61% | 2628 fps | 95% |
| Bofors RP7 | <<locked>> | 80% | 39,465 psi | 62% | 2516 fps | 96.2% |
| Hodgdon H380 | <<locked>> | 80% | 45,179 psi | 71% | 2651 fps | 99.5% |
| Hodgdon H414 | 68 gr | 80% | 37,260 psi | 58% | 2546 fps | 96.2% |
| Hodgdon H4350 | <<locked>> | 80% | 40,379 psi | 63% | 2569 fps | 95.7% |
| Hodgdon H4831 | <<locked>> | 96% | 49,037 psi | 77% | 2753 fps | 95.5% |
| Hodgdon H4831 SC | <<locked>> | 96% | 48,080 psi | 75% | 2736 fps | 95.3% |
| Hodgdon H4895 | <<locked>> | 80% | 52,721 psi | 83% | 2756 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 32,039 psi | 50% | 2405 fps | 98.8% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 49,414 psi | 77% | 2743 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 38,305 psi | 60% | 2680 fps | 95% |
| Hodgdon Superformance | <<locked>> | 80% | 36,260 psi | 57% | 2552 fps | 95.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,919 psi | 42% | 1535 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 50,517 psi | 79% | 2710 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 53,359 psi | 84% | 2733 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 46,644 psi | 73% | 2638 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 48,994 psi | 77% | 2667 fps | 98.7% |
| IMR 4350 | <<locked>> | 82% | 37,623 psi | 59% | 2497 fps | 95.6% |
| IMR 4451 Enduron | <<locked>> | 80% | 41,118 psi | 64% | 2549 fps | 97.1% |
| IMR 4831 | <<locked>> | 80% | 33,794 psi | 53% | 2451 fps | 97.9% |
| IMR 4895 | <<locked>> | 80% | 48,878 psi | 77% | 2723 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 47,805 psi | 75% | 2697 fps | 95.4% |
| IMR 7828 SSC | <<locked>> | 98% | 46,470 psi | 73% | 2772 fps | 95.6% |
| Lovex D073.6 | <<locked>> | 80% | 52,315 psi | 82% | 2720 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 51,314 psi | 80% | 2677 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 46,601 psi | 73% | 2635 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 38,377 psi | 60% | 2497 fps | 97.7% |
| Lovex S070 | <<locked>> | 80% | 36,550 psi | 57% | 2477 fps | 96.1% |
| Lovex S071 | <<locked>> | 92% | 32,256 psi | 51% | 2418 fps | 95.5% |
| Norma 201 | <<locked>> | 80% | 50,879 psi | 80% | 2694 fps | 100% |
| Norma 202 | <<locked>> | 80% | 51,721 psi | 81% | 2690 fps | 100% |
| Norma 203B | <<locked>> | 80% | 46,963 psi | 74% | 2680 fps | 100% |
| Norma 204 | <<locked>> | 86% | 42,467 psi | 67% | 2638 fps | 95.8% |
| Norma MRP | <<locked>> | 88% | 35,433 psi | 56% | 2582 fps | 95.3% |
| Norma URP | <<locked>> | 80% | 35,085 psi | 55% | 2493 fps | 98% |
| Ramshot Big Game | <<locked>> | 80% | 47,355 psi | 74% | 2707 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 43,207 psi | 68% | 2720 fps | 95% |
| Ramshot Hunter | <<locked>> | 80% | 34,026 psi | 53% | 2480 fps | 96% |
| Ramshot Magnum | <<locked>> | 96% | 38,159 psi | 60% | 2598 fps | 95.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,470 psi | 43% | 1575 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 45,324 psi | 71% | 2635 fps | 98.6% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 51,517 psi | 81% | 2812 fps | 100% |
| ReloadSwiss RS 60 | 69.5 gr | 80% | 41,640 psi | 65% | 2687 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 34,795 psi | 55% | 2513 fps | 97.8% |
| ReloadSwiss RS 70 | 70.6 gr | 80% | 34,127 psi | 53% | 2520 fps | 97.2% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 37,753 psi | 59% | 2667 fps | 96.1% |
| Rottweil R 902 | <<locked>> | 80% | 48,501 psi | 76% | 2648 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 41,916 psi | 66% | 2585 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 46,543 psi | 73% | 2680 fps | 95.8% |
| Rottweil R 905 | <<locked>> | 90% | 40,524 psi | 64% | 2621 fps | 95.7% |
| Rottweil R 907 | <<locked>> | 80% | 39,465 psi | 62% | 2516 fps | 96.2% |
| Shooters World Long Rifle | <<locked>> | 80% | 38,377 psi | 60% | 2497 fps | 97.7% |
| Shooters World Match Rifle | <<locked>> | 80% | 52,315 psi | 82% | 2720 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 46,601 psi | 73% | 2635 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 36,550 psi | 57% | 2477 fps | 96.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 43,250 psi | 68% | 2641 fps | 99.9% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 53,142 psi | 83% | 2753 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 50,691 psi | 79% | 2720 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 51,866 psi | 81% | 2625 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 43,671 psi | 68% | 2500 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 37,579 psi | 59% | 2444 fps | 96.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 40,132 psi | 63% | 2615 fps | 95.5% |
| Somchem S335 | <<locked>> | 80% | 51,590 psi | 81% | 2625 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 52,939 psi | 83% | 2740 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 42,453 psi | 67% | 2585 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 47,790 psi | 75% | 2674 fps | 95.1% |
| Somchem S365 | <<locked>> | 80% | 31,546 psi | 49% | 2451 fps | 99.6% |
| Somchem S385 | <<locked>> | 86% | 35,911 psi | 56% | 2493 fps | 95% |
| Vihtavuori N133 | <<locked>> | 80% | 52,460 psi | 82% | 2608 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 48,602 psi | 76% | 2608 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 48,950 psi | 77% | 2625 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 40,495 psi | 63% | 2520 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 36,463 psi | 57% | 2493 fps | 98.3% |
| Vihtavuori N165 | <<locked>> | 92% | 37,840 psi | 59% | 2526 fps | 95.2% |
| Vihtavuori N540 | <<locked>> | 80% | 47,282 psi | 74% | 2621 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 35,984 psi | 56% | 2497 fps | 98% |
| Vihtavuori N555 | <<locked>> | 80% | 27,282 psi | 43% | 2339 fps | 95.9% |
| Vihtavuori N560 | <<locked>> | 96% | 47,601 psi | 75% | 2815 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 35,810 psi | 56% | 2467 fps | 99.6% |
| Winchester 760 | <<locked>> | 80% | 37,405 psi | 59% | 2549 fps | 96.3% |
| Winchester StaBALL HD | <<locked>> | 82% | 23,395 psi | 37% | 2280 fps | 95.1% |
| Winchester StaBALL Match | <<locked>> | 80% | 50,749 psi | 80% | 2730 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 40,553 psi | 64% | 2589 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 108 powders for .340 Weath. Mag. loaded with the .338 | 225gr | Hornady InterLock. Alliant Reloder-26 delivers the highest muzzle velocity at 2,989 fps; across all powders the maximum-charge window runs from 1,719 fps to 2,989 fps. Accurate 3100 gives the best case fill at 100 %, and 108 of the 108 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 225.0 gr projectile in 0.338" calls for a 1:16.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate High Country, Accurate MAGPRO 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 | 225gr | Hornady InterLock 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.