Load Specifications
Bullet:.338 | 250gr | Target Virtus
Bullet Manufacturer:Virtus
Bullet Weight:250 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:1:11.0
Load data in caliber .340 Weath. Mag. with .338 | 250gr | Target Virtus bullet and 113 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 70, Hodgdon Superformance and Alliant Reloder-17.
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% | 54,462 psi | 85% | 2520 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 56,507 psi | 89% | 2598 fps | 99.4% |
| Accurate 3100ᴾ | <<locked>> | 100% | 49,298 psi | 77% | 2589 fps | 99.7% |
| Accurate 4064 | <<locked>> | 86% | 54,940 psi | 86% | 2575 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 55,463 psi | 87% | 2680 fps | 100% |
| Accurate MAGPROᴾ | <<locked>> | 100% | 51,329 psi | 80% | 2720 fps | 96.4% |
| ADI AR 2206H | <<locked>> | 82% | 54,607 psi | 86% | 2605 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 55,738 psi | 87% | 2612 fps | 100% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 57,000 psi | 89% | 2733 fps | 99.1% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 50,923 psi | 80% | 2671 fps | 97.1% |
| ADI Benchmark 8208 | <<locked>> | 82% | 56,927 psi | 89% | 2602 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 54,737 psi | 86% | 2730 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 56,333 psi | 88% | 2631 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 56,739 psi | 89% | 2654 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 96% | 56,478 psi | 89% | 2733 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 90% | 54,114 psi | 85% | 2710 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 56,028 psi | 88% | 2720 fps | 99% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 49,356 psi | 77% | 2667 fps | 98.3% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 46,586 psi | 73% | 2608 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 40,596 psi | 64% | 2539 fps | 99.2% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 53,171 psi | 83% | 2789 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 54,418 psi | 85% | 2628 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 45,266 psi | 71% | 2598 fps | 97.4% |
| Bofors RP3 | <<locked>> | 88% | 57,116 psi | 90% | 2648 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 49,356 psi | 77% | 2667 fps | 98.3% |
| Bofors RP7 | <<locked>> | 92% | 56,681 psi | 89% | 2641 fps | 99.5% |
| Hodgdon BL-C2 | <<locked>> | 82% | 56,739 psi | 89% | 2631 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 57,711 psi | 90% | 2667 fps | 100% |
| Hodgdon H414 | <<locked>> | 92% | 54,404 psi | 85% | 2687 fps | 99.7% |
| Hodgdon H4350 | <<locked>> | 90% | 54,679 psi | 86% | 2651 fps | 99% |
| Hodgdon H4831ᴾ | <<locked>> | 100% | 54,723 psi | 86% | 2674 fps | 97.2% |
| Hodgdon H4831 SCᴾ | <<locked>> | 100% | 53,519 psi | 84% | 2657 fps | 97% |
| Hodgdon H4895 | <<locked>> | 82% | 55,245 psi | 87% | 2615 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 56,710 psi | 89% | 2657 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 55,390 psi | 87% | 2651 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 39,726 psi | 62% | 2562 fps | 96.4% |
| Hodgdon Superformance | <<locked>> | 92% | 54,563 psi | 86% | 2726 fps | 99.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,201 psi | 57% | 1588 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 56,463 psi | 88% | 2618 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 55,782 psi | 87% | 2585 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 55,303 psi | 87% | 2595 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 54,665 psi | 86% | 2585 fps | 99.6% |
| IMR 4350 | <<locked>> | 96% | 57,363 psi | 90% | 2671 fps | 99.6% |
| IMR 4451 Enduron | <<locked>> | 90% | 54,868 psi | 86% | 2618 fps | 99.6% |
| IMR 4831 | <<locked>> | 96% | 55,912 psi | 88% | 2674 fps | 100% |
| IMR 4895 | <<locked>> | 84% | 54,592 psi | 86% | 2635 fps | 100% |
| IMR 4955 Enduronᴾ | <<locked>> | 100% | 56,449 psi | 88% | 2661 fps | 97.6% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 48,312 psi | 76% | 2641 fps | 96.7% |
| IMR 8208 XBR | <<locked>> | 82% | 56,927 psi | 89% | 2602 fps | 100% |
| Lovex D073.6 | <<locked>> | 82% | 54,578 psi | 86% | 2575 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 57,130 psi | 90% | 2579 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 55,187 psi | 86% | 2585 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 54,563 psi | 86% | 2608 fps | 100% |
| Lovex S070 | <<locked>> | 94% | 55,883 psi | 88% | 2651 fps | 99.8% |
| Lovex S071ᴾ | <<locked>> | 100% | 40,727 psi | 64% | 2451 fps | 98.6% |
| Norma 201 | <<locked>> | 84% | 56,608 psi | 89% | 2595 fps | 100% |
| Norma 202 | <<locked>> | 84% | 57,595 psi | 90% | 2592 fps | 100% |
| Norma 203B | <<locked>> | 86% | 55,985 psi | 88% | 2641 fps | 100% |
| Norma 204 | <<locked>> | 94% | 54,520 psi | 85% | 2674 fps | 98.7% |
| Norma MRPᴾ | <<locked>> | 100% | 52,214 psi | 82% | 2746 fps | 99.6% |
| Norma URP | <<locked>> | 94% | 54,549 psi | 85% | 2671 fps | 100% |
| Ramshot Big Game | <<locked>> | 86% | 56,652 psi | 89% | 2667 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 48,370 psi | 76% | 2654 fps | 97% |
| Ramshot Hunter | <<locked>> | 96% | 56,753 psi | 89% | 2723 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 42,757 psi | 67% | 2539 fps | 97.4% |
| Ramshot TAC | <<locked>> | 82% | 57,043 psi | 89% | 2635 fps | 100% |
| Ramshot Wild Boar | <<locked>> | 82% | 57,101 psi | 89% | 2644 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,622 psi | 57% | 1624 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 53,969 psi | 85% | 2605 fps | 99.8% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 53,998 psi | 85% | 2671 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 57,638 psi | 90% | 2749 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 55,477 psi | 87% | 2707 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 54,230 psi | 85% | 2736 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 39,204 psi | 61% | 2549 fps | 97.4% |
| Rottweil R 901 | <<locked>> | 82% | 57,261 psi | 90% | 2566 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 57,348 psi | 90% | 2595 fps | 100% |
| Rottweil R 903 | <<locked>> | 90% | 56,942 psi | 89% | 2641 fps | 100% |
| Rottweil R 904 | <<locked>> | 98% | 55,187 psi | 86% | 2651 fps | 98% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 55,027 psi | 86% | 2703 fps | 99% |
| Rottweil R 907 | <<locked>> | 92% | 56,681 psi | 89% | 2641 fps | 99.5% |
| Shooters World Long Rifle | <<locked>> | 92% | 54,563 psi | 86% | 2608 fps | 100% |
| Shooters World Match Rifle | <<locked>> | 82% | 54,578 psi | 86% | 2575 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 55,187 psi | 86% | 2585 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 55,883 psi | 88% | 2651 fps | 99.8% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 55,201 psi | 87% | 2654 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 55,579 psi | 87% | 2615 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 56,550 psi | 89% | 2628 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 54,447 psi | 85% | 2484 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 55,143 psi | 86% | 2487 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 54,491 psi | 85% | 2569 fps | 99.6% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 54,520 psi | 85% | 2700 fps | 99% |
| Somchem S335 | <<locked>> | 84% | 57,246 psi | 90% | 2523 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 55,361 psi | 87% | 2598 fps | 100% |
| Somchem S355 | <<locked>> | 90% | 57,101 psi | 89% | 2638 fps | 100% |
| Somchem S361 | <<locked>> | 98% | 56,739 psi | 89% | 2644 fps | 97.4% |
| Somchem S365 | <<locked>> | 98% | 57,058 psi | 89% | 2713 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 55,680 psi | 87% | 2680 fps | 99.5% |
| Vihtavuori N133 | <<locked>> | 82% | 54,998 psi | 86% | 2467 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 57,667 psi | 90% | 2549 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 54,578 psi | 86% | 2530 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 54,897 psi | 86% | 2569 fps | 100% |
| Vihtavuori N160 | <<locked>> | 94% | 56,753 psi | 89% | 2664 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 48,051 psi | 75% | 2556 fps | 98.3% |
| Vihtavuori N530 | <<locked>> | 82% | 57,232 psi | 90% | 2595 fps | 100% |
| Vihtavuori N540 | <<locked>> | 86% | 56,231 psi | 88% | 2572 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 55,608 psi | 87% | 2671 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 51,909 psi | 81% | 2674 fps | 100% |
| Vihtavuori N560ᴾ | <<locked>> | 100% | 52,837 psi | 83% | 2736 fps | 97.3% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 56,420 psi | 88% | 2635 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 54,650 psi | 86% | 2690 fps | 99.7% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 41,684 psi | 65% | 2657 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 84% | 56,739 psi | 89% | 2638 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 52,272 psi | 82% | 2625 fps | 98.4% |
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% | 47,790 psi | 75% | 2434 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 46,470 psi | 73% | 2451 fps | 98.1% |
| Accurate 3100 | <<locked>> | 86% | 30,327 psi | 48% | 2234 fps | 95.5% |
| Accurate 4064 | <<locked>> | 80% | 45,281 psi | 71% | 2444 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 34,055 psi | 53% | 2326 fps | 98.4% |
| Accurate MAGPRO | <<locked>> | 98% | 47,776 psi | 75% | 2661 fps | 95.5% |
| ADI AR 2206H | <<locked>> | 80% | 51,242 psi | 80% | 2559 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 43,642 psi | 68% | 2431 fps | 99.9% |
| ADI AR 2209 | <<locked>> | 88% | 38,450 psi | 60% | 2415 fps | 95.1% |
| ADI AR 2213 | <<locked>> | 96% | 44,570 psi | 70% | 2559 fps | 95.5% |
| ADI Benchmark 8208 | <<locked>> | 80% | 53,432 psi | 84% | 2552 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 47,688 psi | 75% | 2625 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 43,642 psi | 68% | 2448 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 46,775 psi | 73% | 2513 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 33,823 psi | 53% | 2339 fps | 98.6% |
| Alliant Reloder-17 | 62.4 gr | 80% | 38,101 psi | 60% | 2454 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 37,927 psi | 59% | 2411 fps | 95.2% |
| Alliant Reloder-22 | <<locked>> | 92% | 37,826 psi | 59% | 2454 fps | 95.4% |
| Alliant Reloder-23 | <<locked>> | 80% | 24,424 psi | 38% | 2116 fps | 96.3% |
| Alliant Reloder-25 | <<locked>> | 90% | 29,559 psi | 46% | 2274 fps | 95.4% |
| Alliant Reloder-26 | <<locked>> | 82% | 27,673 psi | 43% | 2267 fps | 95.5% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 50,879 psi | 80% | 2579 fps | 100% |
| Bofors RP15 | <<locked>> | 94% | 37,333 psi | 59% | 2441 fps | 95% |
| Bofors RP3 | <<locked>> | 80% | 43,511 psi | 68% | 2457 fps | 100% |
| Bofors RP5 | <<locked>> | 92% | 37,826 psi | 59% | 2454 fps | 95.4% |
| Bofors RP7 | <<locked>> | 80% | 38,725 psi | 61% | 2343 fps | 96.5% |
| Hodgdon BL-C2 | <<locked>> | 80% | 53,011 psi | 83% | 2585 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 44,208 psi | 69% | 2470 fps | 99.6% |
| Hodgdon H414 | <<locked>> | 80% | 36,419 psi | 57% | 2375 fps | 96.6% |
| Hodgdon H4350 | <<locked>> | 80% | 39,421 psi | 62% | 2392 fps | 96% |
| Hodgdon H4831 | <<locked>> | 96% | 47,587 psi | 75% | 2566 fps | 95.7% |
| Hodgdon H4831 SC | <<locked>> | 96% | 46,775 psi | 73% | 2552 fps | 95.5% |
| Hodgdon H4895 | <<locked>> | 80% | 51,808 psi | 81% | 2569 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 31,343 psi | 49% | 2244 fps | 99% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 48,211 psi | 76% | 2552 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 37,246 psi | 58% | 2503 fps | 95.4% |
| Hodgdon Superformance | 66 gr | 80% | 35,331 psi | 55% | 2382 fps | 95.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,847 psi | 42% | 1414 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 49,603 psi | 78% | 2523 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 52,359 psi | 82% | 2543 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 45,905 psi | 72% | 2461 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 48,167 psi | 75% | 2487 fps | 98.9% |
| IMR 4350 | <<locked>> | 80% | 34,606 psi | 54% | 2280 fps | 95.2% |
| IMR 4451 Enduron | <<locked>> | 80% | 40,306 psi | 63% | 2375 fps | 97.4% |
| IMR 4831 | <<locked>> | 80% | 32,982 psi | 52% | 2287 fps | 98.2% |
| IMR 4895 | <<locked>> | 80% | 47,964 psi | 75% | 2536 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 46,630 psi | 73% | 2513 fps | 95.7% |
| IMR 7828 SSC | <<locked>> | 98% | 45,194 psi | 71% | 2585 fps | 95.8% |
| IMR 8208 XBR | <<locked>> | 80% | 53,432 psi | 84% | 2552 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 51,097 psi | 80% | 2533 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 50,575 psi | 79% | 2490 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 45,847 psi | 72% | 2454 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 37,623 psi | 59% | 2326 fps | 98% |
| Lovex S070 | <<locked>> | 80% | 35,897 psi | 56% | 2310 fps | 96.5% |
| Lovex S071 | <<locked>> | 90% | 29,370 psi | 46% | 2208 fps | 95% |
| Norma 201 | <<locked>> | 80% | 49,951 psi | 78% | 2503 fps | 100% |
| Norma 202 | <<locked>> | 80% | 50,589 psi | 79% | 2503 fps | 100% |
| Norma 203B | <<locked>> | 80% | 46,108 psi | 72% | 2500 fps | 100% |
| Norma 204 | <<locked>> | 84% | 38,725 psi | 61% | 2405 fps | 95.2% |
| Norma MRP | <<locked>> | 88% | 34,505 psi | 54% | 2411 fps | 95.7% |
| Norma URP | <<locked>> | 80% | 34,345 psi | 54% | 2326 fps | 98.3% |
| Ramshot Big Game | <<locked>> | 80% | 46,253 psi | 72% | 2523 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 41,916 psi | 66% | 2536 fps | 95.1% |
| Ramshot Hunter | <<locked>> | 80% | 33,185 psi | 52% | 2313 fps | 96.4% |
| Ramshot Magnum | <<locked>> | 96% | 37,028 psi | 58% | 2425 fps | 95.6% |
| Ramshot TAC | <<locked>> | 80% | 53,432 psi | 84% | 2585 fps | 100% |
| Ramshot Wild Boar | <<locked>> | 80% | 53,417 psi | 84% | 2595 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,296 psi | 43% | 1450 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 44,425 psi | 70% | 2457 fps | 98.8% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 50,270 psi | 79% | 2618 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 40,582 psi | 64% | 2500 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 33,779 psi | 53% | 2343 fps | 98.1% |
| ReloadSwiss RS 70 | 63.4 gr | 80% | 33,301 psi | 52% | 2352 fps | 97.5% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 34,098 psi | 53% | 2425 fps | 95.1% |
| Rottweil R 901 | <<locked>> | 80% | 53,940 psi | 85% | 2523 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 47,659 psi | 75% | 2464 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 41,133 psi | 64% | 2411 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 42,612 psi | 67% | 2448 fps | 95.2% |
| Rottweil R 905 | <<locked>> | 88% | 36,898 psi | 58% | 2395 fps | 95.1% |
| Rottweil R 907 | <<locked>> | 80% | 38,725 psi | 61% | 2343 fps | 96.5% |
| Shooters World Long Rifle | <<locked>> | 80% | 37,623 psi | 59% | 2326 fps | 98% |
| Shooters World Match Rifle | <<locked>> | 80% | 51,097 psi | 80% | 2533 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 45,847 psi | 72% | 2454 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 35,897 psi | 56% | 2310 fps | 96.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 42,206 psi | 66% | 2461 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 51,880 psi | 81% | 2562 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 49,632 psi | 78% | 2533 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 51,198 psi | 80% | 2444 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 43,033 psi | 67% | 2329 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 36,738 psi | 58% | 2277 fps | 96.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 38,914 psi | 61% | 2438 fps | 95.8% |
| Somchem S335 | <<locked>> | 80% | 50,705 psi | 79% | 2444 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 51,735 psi | 81% | 2552 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 41,597 psi | 65% | 2408 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 46,528 psi | 73% | 2493 fps | 95.3% |
| Somchem S365 | <<locked>> | 80% | 30,763 psi | 48% | 2287 fps | 99.7% |
| Somchem S385 | <<locked>> | 86% | 35,027 psi | 55% | 2329 fps | 95.4% |
| Vihtavuori N133 | <<locked>> | 80% | 51,764 psi | 81% | 2428 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 47,834 psi | 75% | 2428 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 48,167 psi | 75% | 2444 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 39,755 psi | 62% | 2349 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 35,679 psi | 56% | 2326 fps | 98.6% |
| Vihtavuori N165 | <<locked>> | 92% | 36,724 psi | 58% | 2356 fps | 95.5% |
| Vihtavuori N530 | <<locked>> | 80% | 53,621 psi | 84% | 2549 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 46,325 psi | 73% | 2441 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 35,128 psi | 55% | 2329 fps | 98.3% |
| Vihtavuori N555 | <<locked>> | 80% | 26,440 psi | 41% | 2182 fps | 96.3% |
| Vihtavuori N560 | <<locked>> | 96% | 46,108 psi | 72% | 2625 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 34,911 psi | 55% | 2300 fps | 99.7% |
| Winchester 760 | <<locked>> | 80% | 36,419 psi | 57% | 2375 fps | 96.6% |
| Winchester StaBALL HD | <<locked>> | 82% | 22,843 psi | 36% | 2136 fps | 95.8% |
| Winchester StaBALL Match | <<locked>> | 80% | 49,501 psi | 78% | 2539 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 39,508 psi | 62% | 2415 fps | 95.6% |
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 113 powders for .340 Weath. Mag. loaded with the .338 | 250gr | Target Virtus. Alliant Reloder-26 delivers the highest muzzle velocity at 2,789 fps; across all powders the maximum-charge window runs from 1,588 fps to 2,789 fps. Accurate 3100 gives the best case fill at 100 %, and 113 of the 113 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 1:11.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate MAGPRO, 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, Hodgdon Superformance, Alliant Reloder-17 rank at the top here: for .340 Weath. Mag. with the .338 | 250gr | Target Virtus 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.