Load Specifications
Bullet Manufacturer:Nosler
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:1:12.0
Load data in caliber .340 Weath. Mag. with .338 | 250gr | Nosler Custom Competition bullet and 105 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, ReloadSwiss RS 70 and Hodgdon Superformance.
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% | 57,682 psi | 90% | 2556 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 55,361 psi | 87% | 2589 fps | 99.4% |
| Accurate 3100ᴾ | <<locked>> | 100% | 52,460 psi | 82% | 2631 fps | 99.9% |
| Accurate 4064 | <<locked>> | 84% | 54,505 psi | 85% | 2569 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 54,911 psi | 86% | 2677 fps | 100% |
| Accurate MAGPROᴾ | <<locked>> | 100% | 54,331 psi | 85% | 2769 fps | 97.2% |
| ADI AR 2206H | <<locked>> | 82% | 57,014 psi | 89% | 2641 fps | 100% |
| ADI AR 2208 | <<locked>> | 86% | 54,665 psi | 86% | 2602 fps | 100% |
| ADI AR 2209 | <<locked>> | 98% | 55,680 psi | 87% | 2720 fps | 99.1% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 53,359 psi | 84% | 2717 fps | 97.8% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 57,305 psi | 90% | 2766 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 55,695 psi | 87% | 2717 fps | 99.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 55,230 psi | 87% | 2621 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 55,608 psi | 87% | 2641 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 55,521 psi | 87% | 2723 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 90% | 56,898 psi | 89% | 2746 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 54,897 psi | 86% | 2707 fps | 99% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 52,083 psi | 82% | 2713 fps | 98.8% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 49,168 psi | 77% | 2648 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 42,830 psi | 67% | 2585 fps | 99.6% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 56,449 psi | 88% | 2835 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 56,782 psi | 89% | 2661 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 47,674 psi | 75% | 2644 fps | 98% |
| Bofors RP3 | <<locked>> | 86% | 56,072 psi | 88% | 2638 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 52,083 psi | 82% | 2713 fps | 98.8% |
| Bofors RP7 | <<locked>> | 90% | 55,506 psi | 87% | 2628 fps | 99.5% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 42,699 psi | 67% | 2523 fps | 95.9% |
| Hodgdon H380 | <<locked>> | 86% | 56,434 psi | 88% | 2654 fps | 100% |
| Hodgdon H414 | <<locked>> | 92% | 57,101 psi | 89% | 2726 fps | 99.9% |
| Hodgdon H4350 | <<locked>> | 90% | 56,956 psi | 89% | 2687 fps | 99.3% |
| Hodgdon H4831ᴾ | <<locked>> | 100% | 57,261 psi | 90% | 2717 fps | 97.8% |
| Hodgdon H4831 SCᴾ | <<locked>> | 100% | 56,043 psi | 88% | 2700 fps | 97.6% |
| Hodgdon H4895 | <<locked>> | 82% | 57,638 psi | 90% | 2648 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 55,753 psi | 87% | 2648 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 54,027 psi | 85% | 2638 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 42,018 psi | 66% | 2618 fps | 97.5% |
| Hodgdon Superformance | <<locked>> | 92% | 57,348 psi | 90% | 2769 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,477 psi | 57% | 1601 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 54,897 psi | 86% | 2602 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 57,580 psi | 90% | 2628 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 56,681 psi | 89% | 2618 fps | 99.8% |
| IMR 4350 | <<locked>> | 94% | 56,246 psi | 88% | 2661 fps | 99.6% |
| IMR 4451 Enduron | <<locked>> | 90% | 57,058 psi | 89% | 2651 fps | 99.8% |
| IMR 4831 | <<locked>> | 94% | 55,187 psi | 86% | 2664 fps | 100% |
| IMR 4895 | <<locked>> | 84% | 57,058 psi | 89% | 2667 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 98% | 55,201 psi | 87% | 2651 fps | 97.6% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 50,778 psi | 80% | 2690 fps | 97.4% |
| Lovex D073.6 | <<locked>> | 82% | 57,493 psi | 90% | 2615 fps | 100% |
| Lovex S060 | <<locked>> | 82% | 55,782 psi | 87% | 2566 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 57,638 psi | 90% | 2618 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 56,985 psi | 89% | 2644 fps | 100% |
| Lovex S070 | <<locked>> | 92% | 54,926 psi | 86% | 2641 fps | 99.8% |
| Lovex S071ᴾ | <<locked>> | 100% | 43,584 psi | 68% | 2497 fps | 99.1% |
| Norma 201 | <<locked>> | 82% | 55,637 psi | 87% | 2585 fps | 100% |
| Norma 202 | <<locked>> | 82% | 56,246 psi | 88% | 2575 fps | 100% |
| Norma 203B | <<locked>> | 84% | 54,897 psi | 86% | 2631 fps | 100% |
| Norma 204 | <<locked>> | 94% | 57,000 psi | 89% | 2713 fps | 99.1% |
| Norma MRPᴾ | <<locked>> | 100% | 55,303 psi | 87% | 2792 fps | 99.8% |
| Norma URP | <<locked>> | 94% | 57,101 psi | 89% | 2707 fps | 100% |
| Ramshot Big Game | <<locked>> | 84% | 55,390 psi | 87% | 2654 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 50,923 psi | 80% | 2700 fps | 97.8% |
| Ramshot Hunter | <<locked>> | 94% | 55,796 psi | 87% | 2713 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 45,368 psi | 71% | 2589 fps | 98.2% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,173 psi | 58% | 1640 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 56,333 psi | 88% | 2641 fps | 99.9% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 56,608 psi | 89% | 2707 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 56,449 psi | 88% | 2736 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 54,534 psi | 85% | 2697 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 56,956 psi | 89% | 2779 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 41,771 psi | 65% | 2612 fps | 98.4% |
| Rottweil R 902 | <<locked>> | 84% | 56,333 psi | 88% | 2585 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 56,173 psi | 88% | 2631 fps | 100% |
| Rottweil R 904 | <<locked>> | 98% | 57,595 psi | 90% | 2690 fps | 98.4% |
| Rottweil R 905 | <<locked>> | 98% | 54,288 psi | 85% | 2697 fps | 99.1% |
| Rottweil R 907 | <<locked>> | 90% | 55,506 psi | 87% | 2628 fps | 99.5% |
| Shooters World Long Rifle | <<locked>> | 92% | 56,985 psi | 89% | 2644 fps | 100% |
| Shooters World Match Rifle | <<locked>> | 82% | 57,493 psi | 90% | 2615 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 57,638 psi | 90% | 2618 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 54,926 psi | 86% | 2641 fps | 99.8% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 57,682 psi | 90% | 2690 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 55,303 psi | 87% | 2615 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 56,565 psi | 89% | 2513 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 57,334 psi | 90% | 2516 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 56,898 psi | 89% | 2605 fps | 99.8% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 57,392 psi | 90% | 2743 fps | 99.4% |
| Somchem S335 | <<locked>> | 82% | 56,115 psi | 88% | 2513 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 56,173 psi | 88% | 2628 fps | 100% |
| Somchem S361 | <<locked>> | 96% | 55,709 psi | 87% | 2635 fps | 97.4% |
| Somchem S365 | <<locked>> | 96% | 56,231 psi | 88% | 2707 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 54,752 psi | 86% | 2671 fps | 99.5% |
| Vihtavuori N133 | <<locked>> | 82% | 57,101 psi | 89% | 2493 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 56,652 psi | 89% | 2539 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 56,898 psi | 89% | 2559 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 57,421 psi | 90% | 2602 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 55,825 psi | 87% | 2654 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 50,647 psi | 79% | 2598 fps | 98.8% |
| Vihtavuori N540 | <<locked>> | 84% | 55,042 psi | 86% | 2562 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 54,810 psi | 86% | 2661 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 55,158 psi | 86% | 2717 fps | 100% |
| Vihtavuori N560ᴾ | <<locked>> | 100% | 55,724 psi | 87% | 2785 fps | 98% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 55,259 psi | 87% | 2625 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 57,334 psi | 90% | 2730 fps | 99.9% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 44,237 psi | 69% | 2707 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 55,259 psi | 87% | 2621 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 54,940 psi | 86% | 2667 fps | 98.9% |
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% | 50,749 psi | 80% | 2470 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 48,588 psi | 76% | 2487 fps | 98.6% |
| Accurate 3100 | <<locked>> | 84% | 30,632 psi | 48% | 2238 fps | 95.7% |
| Accurate 4064 | <<locked>> | 80% | 48,095 psi | 75% | 2480 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 36,463 psi | 57% | 2375 fps | 99% |
| Accurate MAGPRO | <<locked>> | 96% | 47,108 psi | 74% | 2654 fps | 95.6% |
| ADI AR 2206H | <<locked>> | 80% | 53,374 psi | 84% | 2592 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 45,382 psi | 71% | 2461 fps | 100% |
| ADI AR 2209 | <<locked>> | 86% | 37,869 psi | 59% | 2405 fps | 95.1% |
| ADI AR 2213 | <<locked>> | 94% | 43,830 psi | 69% | 2552 fps | 95.5% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 49,937 psi | 78% | 2664 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 86% | 38,000 psi | 60% | 2411 fps | 95.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 45,818 psi | 72% | 2484 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 48,936 psi | 77% | 2546 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 35,650 psi | 56% | 2382 fps | 99.1% |
| Alliant Reloder-17 | <<locked>> | 80% | 40,277 psi | 63% | 2497 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 37,594 psi | 59% | 2405 fps | 95.2% |
| Alliant Reloder-22 | <<locked>> | 90% | 37,565 psi | 59% | 2451 fps | 95.4% |
| Alliant Reloder-23 | <<locked>> | 80% | 26,165 psi | 41% | 2169 fps | 97.4% |
| Alliant Reloder-25 | <<locked>> | 88% | 29,617 psi | 46% | 2277 fps | 95.6% |
| Alliant Reloder-26 | 65.5 gr | 80% | 27,702 psi | 43% | 2267 fps | 95.7% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 53,258 psi | 83% | 2615 fps | 100% |
| Bofors RP15 | <<locked>> | 92% | 37,072 psi | 58% | 2438 fps | 95.1% |
| Bofors RP3 | <<locked>> | 80% | 46,122 psi | 72% | 2497 fps | 100% |
| Bofors RP5 | <<locked>> | 90% | 37,565 psi | 59% | 2451 fps | 95.4% |
| Bofors RP7 | <<locked>> | 80% | 40,698 psi | 64% | 2385 fps | 97.2% |
| Hodgdon H1000 | <<locked>> | 98% | 40,045 psi | 63% | 2470 fps | 95% |
| Hodgdon H380 | <<locked>> | 80% | 46,572 psi | 73% | 2510 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 80% | 38,421 psi | 60% | 2415 fps | 97.3% |
| Hodgdon H4350 | <<locked>> | 80% | 41,481 psi | 65% | 2434 fps | 96.7% |
| Hodgdon H4831 | <<locked>> | 94% | 46,760 psi | 73% | 2556 fps | 95.7% |
| Hodgdon H4831 SC | <<locked>> | 94% | 45,992 psi | 72% | 2543 fps | 95.5% |
| Hodgdon H4895 | <<locked>> | 80% | 54,012 psi | 85% | 2598 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 33,199 psi | 52% | 2283 fps | 99.5% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 50,560 psi | 79% | 2589 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 96% | 36,999 psi | 58% | 2500 fps | 95.5% |
| Hodgdon Superformance | 67.5 gr | 80% | 37,231 psi | 58% | 2425 fps | 96.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,166 psi | 43% | 1427 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 51,605 psi | 81% | 2556 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 47,718 psi | 75% | 2490 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 49,980 psi | 78% | 2520 fps | 99.2% |
| IMR 4350 | <<locked>> | 80% | 36,390 psi | 57% | 2320 fps | 96% |
| IMR 4451 Enduron | <<locked>> | 80% | 42,105 psi | 66% | 2411 fps | 97.9% |
| IMR 4831 | <<locked>> | 80% | 35,114 psi | 55% | 2333 fps | 98.8% |
| IMR 4895 | <<locked>> | 80% | 50,198 psi | 79% | 2572 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 45,934 psi | 72% | 2503 fps | 95.7% |
| IMR 7828 SSC | <<locked>> | 96% | 44,483 psi | 70% | 2579 fps | 95.8% |
| Lovex D073.6 | <<locked>> | 80% | 53,751 psi | 84% | 2566 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 52,518 psi | 82% | 2523 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 48,080 psi | 75% | 2487 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 39,668 psi | 62% | 2369 fps | 98.6% |
| Lovex S070 | <<locked>> | 80% | 37,913 psi | 59% | 2356 fps | 97.3% |
| Lovex S071 | <<locked>> | 88% | 29,805 psi | 47% | 2218 fps | 95.4% |
| Norma 201 | <<locked>> | 80% | 52,272 psi | 82% | 2539 fps | 100% |
| Norma 202 | <<locked>> | 80% | 52,852 psi | 83% | 2533 fps | 100% |
| Norma 203B | <<locked>> | 80% | 48,298 psi | 76% | 2536 fps | 100% |
| Norma 204 | <<locked>> | 82% | 38,189 psi | 60% | 2398 fps | 95.2% |
| Norma MRP | <<locked>> | 86% | 34,243 psi | 54% | 2405 fps | 95.8% |
| Norma URP | <<locked>> | 80% | 36,434 psi | 57% | 2372 fps | 98.9% |
| Ramshot Big Game | <<locked>> | 80% | 48,501 psi | 76% | 2559 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 41,336 psi | 65% | 2530 fps | 95.2% |
| Ramshot Hunter | <<locked>> | 80% | 35,186 psi | 55% | 2359 fps | 97.2% |
| Ramshot Magnum | <<locked>> | 94% | 36,709 psi | 58% | 2418 fps | 95.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,673 psi | 43% | 1463 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 46,586 psi | 73% | 2497 fps | 99.2% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 52,852 psi | 83% | 2654 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 42,786 psi | 67% | 2543 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 36,085 psi | 57% | 2392 fps | 98.7% |
| ReloadSwiss RS 70 | 64.9 gr | 80% | 35,230 psi | 55% | 2398 fps | 98.3% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 33,924 psi | 53% | 2425 fps | 95.3% |
| Rottweil R 902 | <<locked>> | 80% | 49,734 psi | 78% | 2497 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 43,526 psi | 68% | 2451 fps | 100% |
| Rottweil R 904 | <<locked>> | 88% | 42,003 psi | 66% | 2441 fps | 95.2% |
| Rottweil R 905 | <<locked>> | 86% | 36,535 psi | 57% | 2388 fps | 95.1% |
| Rottweil R 907 | <<locked>> | 80% | 40,698 psi | 64% | 2385 fps | 97.2% |
| Shooters World Long Rifle | <<locked>> | 80% | 39,668 psi | 62% | 2369 fps | 98.6% |
| Shooters World Match Rifle | <<locked>> | 80% | 53,751 psi | 84% | 2566 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 48,080 psi | 75% | 2487 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 37,913 psi | 59% | 2356 fps | 97.3% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 44,425 psi | 70% | 2500 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 51,851 psi | 81% | 2569 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 53,084 psi | 83% | 2470 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 44,860 psi | 70% | 2356 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 38,827 psi | 61% | 2316 fps | 97.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 36,187 psi | 57% | 2382 fps | 95% |
| Somchem S335 | <<locked>> | 80% | 52,852 psi | 83% | 2470 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 43,787 psi | 69% | 2448 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 45,672 psi | 72% | 2480 fps | 95.3% |
| Somchem S365 | <<locked>> | 80% | 32,851 psi | 51% | 2333 fps | 100% |
| Somchem S385 | <<locked>> | 84% | 34,882 psi | 55% | 2326 fps | 95.5% |
| Vihtavuori N133 | <<locked>> | 80% | 53,664 psi | 84% | 2454 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 50,024 psi | 78% | 2457 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 50,285 psi | 79% | 2474 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 41,843 psi | 66% | 2385 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 37,724 psi | 59% | 2365 fps | 99.1% |
| Vihtavuori N165 | <<locked>> | 90% | 36,463 psi | 57% | 2352 fps | 95.6% |
| Vihtavuori N540 | <<locked>> | 80% | 48,544 psi | 76% | 2474 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 37,289 psi | 58% | 2372 fps | 98.9% |
| Vihtavuori N555 | <<locked>> | 80% | 28,616 psi | 45% | 2234 fps | 97.4% |
| Vihtavuori N560 | <<locked>> | 94% | 45,469 psi | 71% | 2615 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 36,927 psi | 58% | 2339 fps | 99.9% |
| Winchester 760 | <<locked>> | 80% | 38,580 psi | 60% | 2421 fps | 97.3% |
| Winchester StaBALL HD | <<locked>> | 80% | 23,061 psi | 36% | 2146 fps | 96.3% |
| Winchester StaBALL Match | <<locked>> | 80% | 51,779 psi | 81% | 2575 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 90% | 38,986 psi | 61% | 2408 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 105 powders for .340 Weath. Mag. loaded with the .338 | 250gr | Nosler Custom Competition. Alliant Reloder-26 delivers the highest muzzle velocity at 2,835 fps; across all powders the maximum-charge window runs from 1,601 fps to 2,835 fps. Accurate 3100 gives the best case fill at 100 %, and 105 of the 105 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 1:12.0 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. Alliant Reloder-26, ReloadSwiss RS 70, Hodgdon Superformance rank at the top here: for .340 Weath. Mag. with the .338 | 250gr | Nosler Custom Competition 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.