Load Specifications
Bullet Manufacturer:Swift
Bullet Weight:210 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:1:13.5
Load data in caliber .340 Weath. Mag. with .338 | 210gr | Swift Scirocco 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 70, Alliant Reloder-17 and ReloadSwiss RS 60.
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 2015 | <<locked>> | 82% | 56,753 psi | 89% | 2762 fps | 100% |
| Accurate 2495 | <<locked>> | 86% | 56,043 psi | 88% | 2795 fps | 100% |
| Accurate 2520 | <<locked>> | 82% | 57,537 psi | 90% | 2861 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 54,447 psi | 85% | 2808 fps | 98.2% |
| Accurate 3100ᴾ | <<locked>> | 100% | 46,818 psi | 73% | 2779 fps | 98.5% |
| Accurate 4064 | <<locked>> | 88% | 56,275 psi | 88% | 2848 fps | 100% |
| Accurate 4350 | <<locked>> | 96% | 56,507 psi | 89% | 2949 fps | 100% |
| Accurate High Countryᴾ | <<locked>> | 100% | 51,053 psi | 80% | 2969 fps | 96.1% |
| ADI AR 2206H | <<locked>> | 84% | 55,825 psi | 87% | 2877 fps | 100% |
| ADI AR 2208 | <<locked>> | 90% | 56,927 psi | 89% | 2881 fps | 100% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 54,128 psi | 85% | 2927 fps | 97.4% |
| ADI Benchmark 8208 | <<locked>> | 82% | 54,650 psi | 86% | 2822 fps | 100% |
| Alliant AR-Comp | <<locked>> | 82% | 56,144 psi | 88% | 2792 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 55,898 psi | 88% | 3009 fps | 100% |
| Alliant Power Pro Varmintᴾ | <<locked>> | 100% | 54,027 psi | 85% | 2927 fps | 97.5% |
| Alliant Power Pro Varmintᴾ | <<locked>> | 100% | 54,027 psi | 85% | 2927 fps | 97.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 90% | 57,305 psi | 90% | 2900 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 54,273 psi | 85% | 2874 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 98% | 57,116 psi | 90% | 3002 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 92% | 54,940 psi | 86% | 2982 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 53,258 psi | 83% | 2920 fps | 97.4% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 46,731 psi | 73% | 2854 fps | 96.2% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 44,063 psi | 69% | 2802 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 38,711 psi | 61% | 2707 fps | 97.2% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 50,038 psi | 78% | 2986 fps | 99.9% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 55,680 psi | 87% | 2894 fps | 100% |
| Bofors RP3 | <<locked>> | 88% | 54,650 psi | 86% | 2871 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 46,731 psi | 73% | 2854 fps | 96.2% |
| Bofors RP7 | <<locked>> | 92% | 54,244 psi | 85% | 2844 fps | 98.3% |
| Hodgdon Benchmark | <<locked>> | 82% | 56,057 psi | 88% | 2802 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 82% | 54,360 psi | 85% | 2854 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 55,187 psi | 86% | 2884 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 94% | 55,230 psi | 87% | 2946 fps | 99% |
| Hodgdon H4350 | <<locked>> | 92% | 55,579 psi | 87% | 2904 fps | 98% |
| Hodgdon H4895 | <<locked>> | 84% | 56,434 psi | 88% | 2887 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 57,435 psi | 90% | 2923 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 56,391 psi | 88% | 2923 fps | 100% |
| Hodgdon Superformance | <<locked>> | 94% | 55,550 psi | 87% | 2986 fps | 98.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,940 psi | 56% | 1759 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 57,624 psi | 90% | 2887 fps | 100% |
| IMR 3031 | <<locked>> | 84% | 56,768 psi | 89% | 2861 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 56,304 psi | 88% | 2861 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 86% | 56,028 psi | 88% | 2848 fps | 98.9% |
| IMR 4350 | <<locked>> | 96% | 54,911 psi | 86% | 2877 fps | 98.5% |
| IMR 4451 Enduron | <<locked>> | 92% | 56,057 psi | 88% | 2877 fps | 98.9% |
| IMR 4831 | <<locked>> | 98% | 56,869 psi | 89% | 2936 fps | 100% |
| IMR 4895 | <<locked>> | 86% | 55,695 psi | 87% | 2904 fps | 100% |
| IMR 8208 XBR | <<locked>> | 82% | 54,650 psi | 86% | 2822 fps | 100% |
| Lovex D073.6 | <<locked>> | 84% | 55,912 psi | 88% | 2848 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 55,056 psi | 86% | 2802 fps | 100% |
| Lovex S062 | <<locked>> | 88% | 56,463 psi | 88% | 2858 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 55,840 psi | 88% | 2874 fps | 99.6% |
| Lovex S070 | <<locked>> | 96% | 57,000 psi | 89% | 2913 fps | 99.2% |
| Lovex S071ᴾ | <<locked>> | 100% | 38,754 psi | 61% | 2625 fps | 96.6% |
| Norma 201 | <<locked>> | 84% | 54,505 psi | 85% | 2818 fps | 100% |
| Norma 202 | <<locked>> | 84% | 55,201 psi | 87% | 2818 fps | 100% |
| Norma 203B | <<locked>> | 88% | 57,043 psi | 89% | 2913 fps | 100% |
| Norma 204 | <<locked>> | 96% | 55,550 psi | 87% | 2927 fps | 97.6% |
| Norma MRPᴾ | <<locked>> | 100% | 49,545 psi | 78% | 2940 fps | 98.2% |
| Norma URP | <<locked>> | 96% | 55,347 psi | 87% | 2933 fps | 100% |
| Ramshot Big Game | <<locked>> | 86% | 54,128 psi | 85% | 2887 fps | 100% |
| Ramshot Hunter | <<locked>> | 98% | 57,624 psi | 90% | 2986 fps | 99.7% |
| Ramshot TAC | <<locked>> | 82% | 54,679 psi | 86% | 2848 fps | 99.6% |
| Ramshot Wild Boar | <<locked>> | 82% | 54,665 psi | 86% | 2864 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,477 psi | 57% | 1798 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 55,288 psi | 87% | 2867 fps | 99.3% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 54,955 psi | 86% | 2943 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 54,520 psi | 85% | 2976 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 56,318 psi | 88% | 2972 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 55,216 psi | 87% | 3002 fps | 99.9% |
| Rottweil R 901 | <<locked>> | 82% | 55,463 psi | 87% | 2795 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 55,085 psi | 86% | 2818 fps | 100% |
| Rottweil R 903 | <<locked>> | 90% | 54,505 psi | 85% | 2861 fps | 100% |
| Rottweil R 904ᴾ | <<locked>> | 100% | 56,115 psi | 88% | 2900 fps | 96.7% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 52,228 psi | 82% | 2900 fps | 97.4% |
| Rottweil R 907 | <<locked>> | 92% | 54,244 psi | 85% | 2844 fps | 98.3% |
| Shooters World Long Rifle | <<locked>> | 94% | 55,840 psi | 88% | 2874 fps | 99.6% |
| Shooters World Match Rifle | <<locked>> | 84% | 55,912 psi | 88% | 2848 fps | 100% |
| Shooters World Precision | <<locked>> | 88% | 56,463 psi | 88% | 2858 fps | 100% |
| Shooters World SW4350 | <<locked>> | 96% | 57,000 psi | 89% | 2913 fps | 99.2% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 56,072 psi | 88% | 2923 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 57,174 psi | 90% | 2884 fps | 99.9% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 57,711 psi | 90% | 2900 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 55,840 psi | 88% | 2753 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 56,333 psi | 88% | 2753 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 55,898 psi | 88% | 2825 fps | 98.9% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 51,735 psi | 81% | 2897 fps | 97.3% |
| Somchem S335 | <<locked>> | 84% | 55,201 psi | 87% | 2749 fps | 100% |
| Somchem S341 | <<locked>> | 84% | 56,753 psi | 89% | 2867 fps | 100% |
| Somchem S355 | <<locked>> | 90% | 54,636 psi | 86% | 2858 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 57,392 psi | 90% | 2982 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 52,837 psi | 83% | 2877 fps | 98.2% |
| Vihtavuori N133 | <<locked>> | 84% | 56,231 psi | 88% | 2736 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 55,332 psi | 87% | 2782 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 55,840 psi | 88% | 2799 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 56,101 psi | 88% | 2835 fps | 100% |
| Vihtavuori N160 | <<locked>> | 96% | 57,711 psi | 90% | 2927 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 45,629 psi | 72% | 2740 fps | 96.3% |
| Vihtavuori N530 | <<locked>> | 82% | 55,027 psi | 86% | 2822 fps | 100% |
| Vihtavuori N540 | <<locked>> | 88% | 57,363 psi | 90% | 2841 fps | 100% |
| Vihtavuori N550 | <<locked>> | 96% | 56,768 psi | 89% | 2936 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 49,081 psi | 77% | 2877 fps | 99.9% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 57,624 psi | 90% | 2897 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 55,506 psi | 87% | 2874 fps | 100% |
| Winchester 760 | <<locked>> | 94% | 55,434 psi | 87% | 2949 fps | 99% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 39,653 psi | 62% | 2841 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 84% | 54,143 psi | 85% | 2854 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 49,588 psi | 78% | 2812 fps | 96.5% |
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 2015 | <<locked>> | 80% | 53,200 psi | 83% | 2717 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 46,137 psi | 72% | 2654 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 53,722 psi | 84% | 2808 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 44,744 psi | 70% | 2641 fps | 96.2% |
| Accurate 3100 | <<locked>> | 92% | 35,592 psi | 56% | 2556 fps | 95.6% |
| Accurate 4064 | <<locked>> | 80% | 43,685 psi | 68% | 2657 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 32,547 psi | 51% | 2500 fps | 96.4% |
| Accurate High Country | <<locked>> | 98% | 47,558 psi | 75% | 2907 fps | 95.2% |
| ADI AR 2206H | <<locked>> | 80% | 49,255 psi | 77% | 2776 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 41,800 psi | 66% | 2628 fps | 99.1% |
| ADI AR 2209 | <<locked>> | 94% | 44,701 psi | 70% | 2759 fps | 95.1% |
| ADI Benchmark 8208 | <<locked>> | 80% | 51,329 psi | 80% | 2776 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 52,518 psi | 82% | 2746 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 45,382 psi | 71% | 2828 fps | 99.6% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 44,599 psi | 70% | 2759 fps | 95.3% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 44,599 psi | 70% | 2759 fps | 95.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 41,959 psi | 66% | 2651 fps | 99.8% |
| Alliant Reloder-15 | <<locked>> | 80% | 44,846 psi | 70% | 2717 fps | 99.6% |
| Alliant Reloder-16 | <<locked>> | 80% | 32,460 psi | 51% | 2513 fps | 96.5% |
| Alliant Reloder-17 | 67 gr | 80% | 36,361 psi | 57% | 2638 fps | 99.2% |
| Alliant Reloder-19 | <<locked>> | 94% | 44,019 psi | 69% | 2749 fps | 95.2% |
| Alliant Reloder-22 | <<locked>> | 98% | 43,772 psi | 69% | 2795 fps | 95.3% |
| Alliant Reloder-23 | <<locked>> | 84% | 26,731 psi | 42% | 2372 fps | 95.4% |
| Alliant Reloder-25 | <<locked>> | 96% | 34,258 psi | 54% | 2595 fps | 95.4% |
| Alliant Reloder-26 | <<locked>> | 88% | 32,677 psi | 51% | 2605 fps | 95.8% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 48,805 psi | 76% | 2789 fps | 99.7% |
| Bofors RP3 | <<locked>> | 80% | 41,858 psi | 66% | 2661 fps | 99.9% |
| Bofors RP5 | <<locked>> | 98% | 43,772 psi | 69% | 2795 fps | 95.3% |
| Bofors RP7 | <<locked>> | 82% | 39,813 psi | 62% | 2579 fps | 95.1% |
| Hodgdon Benchmark | <<locked>> | 80% | 52,692 psi | 83% | 2753 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 50,836 psi | 80% | 2802 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 42,453 psi | 67% | 2664 fps | 98.5% |
| Hodgdon H414 | <<locked>> | 84% | 39,784 psi | 62% | 2664 fps | 95.9% |
| Hodgdon H4350 | <<locked>> | 84% | 43,018 psi | 67% | 2684 fps | 95.2% |
| Hodgdon H4895 | <<locked>> | 80% | 49,748 psi | 78% | 2785 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 29,979 psi | 47% | 2411 fps | 97.2% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 46,151 psi | 72% | 2766 fps | 100% |
| Hodgdon Superformance | <<locked>> | 86% | 41,858 psi | 66% | 2736 fps | 96% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,774 psi | 42% | 1572 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 47,630 psi | 75% | 2736 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 50,096 psi | 79% | 2769 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 43,947 psi | 69% | 2657 fps | 99.5% |
| IMR 4166 Enduron | <<locked>> | 80% | 46,296 psi | 73% | 2684 fps | 97.4% |
| IMR 4350 | <<locked>> | 86% | 40,118 psi | 63% | 2612 fps | 95.2% |
| IMR 4451 Enduron | <<locked>> | 80% | 38,725 psi | 61% | 2556 fps | 95.2% |
| IMR 4831 | <<locked>> | 80% | 31,604 psi | 50% | 2461 fps | 96.1% |
| IMR 4895 | <<locked>> | 80% | 45,963 psi | 72% | 2746 fps | 99.9% |
| IMR 8208 XBR | <<locked>> | 80% | 51,329 psi | 80% | 2776 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 48,907 psi | 77% | 2749 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 48,805 psi | 76% | 2703 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 44,150 psi | 69% | 2664 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 36,289 psi | 57% | 2510 fps | 96.1% |
| Lovex S070 | <<locked>> | 82% | 36,796 psi | 58% | 2539 fps | 95% |
| Lovex S071 | <<locked>> | 96% | 34,127 psi | 53% | 2523 fps | 95% |
| Norma 201 | <<locked>> | 80% | 48,225 psi | 76% | 2720 fps | 100% |
| Norma 202 | <<locked>> | 80% | 48,762 psi | 76% | 2723 fps | 100% |
| Norma 203B | <<locked>> | 80% | 44,208 psi | 69% | 2703 fps | 99.7% |
| Norma 204 | <<locked>> | 90% | 45,252 psi | 71% | 2753 fps | 95.3% |
| Norma MRP | <<locked>> | 94% | 40,393 psi | 63% | 2756 fps | 95.9% |
| Norma URP | <<locked>> | 80% | 32,735 psi | 51% | 2500 fps | 96.3% |
| Ramshot Big Game | <<locked>> | 80% | 44,164 psi | 69% | 2723 fps | 99.7% |
| Ramshot Hunter | <<locked>> | 84% | 36,390 psi | 57% | 2595 fps | 95.7% |
| Ramshot TAC | <<locked>> | 80% | 51,271 psi | 80% | 2795 fps | 99.3% |
| Ramshot Wild Boar | <<locked>> | 80% | 51,169 psi | 80% | 2812 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,180 psi | 43% | 1608 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 42,757 psi | 67% | 2651 fps | 97.2% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 47,921 psi | 75% | 2828 fps | 99.8% |
| ReloadSwiss RS 60 | 67 gr | 80% | 38,682 psi | 61% | 2700 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 32,314 psi | 51% | 2516 fps | 95.9% |
| ReloadSwiss RS 70 | 69.8 gr | 82% | 34,272 psi | 54% | 2579 fps | 95.9% |
| Rottweil R 901 | <<locked>> | 80% | 52,286 psi | 82% | 2749 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 45,919 psi | 72% | 2674 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 39,378 psi | 62% | 2605 fps | 99.5% |
| Rottweil R 904 | <<locked>> | 96% | 49,284 psi | 77% | 2792 fps | 95.2% |
| Rottweil R 905 | <<locked>> | 94% | 42,743 psi | 67% | 2730 fps | 95.1% |
| Rottweil R 907 | <<locked>> | 82% | 39,813 psi | 62% | 2579 fps | 95.1% |
| Shooters World Long Rifle | <<locked>> | 80% | 36,289 psi | 57% | 2510 fps | 96.1% |
| Shooters World Match Rifle | <<locked>> | 80% | 48,907 psi | 77% | 2749 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 44,150 psi | 69% | 2664 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 36,796 psi | 58% | 2539 fps | 95% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 40,408 psi | 63% | 2657 fps | 99.3% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 49,980 psi | 78% | 2772 fps | 99.5% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 47,718 psi | 75% | 2746 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 49,226 psi | 77% | 2661 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 41,307 psi | 65% | 2530 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 37,826 psi | 59% | 2503 fps | 95.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 45,208 psi | 71% | 2782 fps | 95.8% |
| Somchem S335 | <<locked>> | 80% | 48,950 psi | 77% | 2661 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 49,676 psi | 78% | 2762 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 39,958 psi | 63% | 2605 fps | 99.5% |
| Somchem S365 | <<locked>> | 80% | 29,457 psi | 46% | 2457 fps | 98.4% |
| Somchem S385 | <<locked>> | 92% | 40,727 psi | 64% | 2661 fps | 95.4% |
| Vihtavuori N133 | <<locked>> | 80% | 49,690 psi | 78% | 2648 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 45,701 psi | 72% | 2644 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 46,122 psi | 72% | 2657 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 38,116 psi | 60% | 2539 fps | 99.8% |
| Vihtavuori N160 | <<locked>> | 80% | 34,127 psi | 53% | 2500 fps | 96.7% |
| Vihtavuori N165 | <<locked>> | 98% | 42,714 psi | 67% | 2684 fps | 95.5% |
| Vihtavuori N530 | <<locked>> | 80% | 51,605 psi | 81% | 2772 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 44,541 psi | 70% | 2651 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 33,663 psi | 53% | 2503 fps | 96.3% |
| Vihtavuori N555 | <<locked>> | 84% | 28,979 psi | 45% | 2448 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 33,678 psi | 53% | 2477 fps | 98.6% |
| Winchester 748 | <<locked>> | 80% | 51,837 psi | 81% | 2818 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 37,246 psi | 58% | 2608 fps | 95% |
| Winchester StaBALL HD | <<locked>> | 88% | 26,832 psi | 42% | 2454 fps | 96.1% |
| Winchester StaBALL Match | <<locked>> | 80% | 47,514 psi | 74% | 2753 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 46,369 psi | 73% | 2756 fps | 95.7% |
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 | 210gr | Swift Scirocco. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,009 fps; across all powders the maximum-charge window runs from 1,759 fps to 3,009 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 56–90 %, leaving at least 10 % headroom. The 210.0 gr projectile in 0.338" calls for a 1:13.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate High Country, ADI AR 2209 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, Alliant Reloder-17, ReloadSwiss RS 60 rank at the top here: for .340 Weath. Mag. with the .338 | 210gr | Swift Scirocco 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.