Load Specifications
Bullet Manufacturer:Lehigh Defense
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 | Lehigh Defense Controlled Fracturing bullet and 115 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-16.
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>> | 86% | 57,566 psi | 90% | 2552 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 56,275 psi | 88% | 2592 fps | 99.3% |
| Accurate 3100ᴾ | <<locked>> | 100% | 48,588 psi | 76% | 2572 fps | 99.6% |
| Accurate 4064 | <<locked>> | 86% | 54,302 psi | 85% | 2566 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 54,911 psi | 86% | 2671 fps | 100% |
| Accurate MAGPROᴾ | <<locked>> | 100% | 50,734 psi | 80% | 2707 fps | 96.2% |
| ADI AR 2206H | <<locked>> | 84% | 57,638 psi | 90% | 2641 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 55,405 psi | 87% | 2605 fps | 100% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 56,304 psi | 88% | 2717 fps | 99% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 50,299 psi | 79% | 2657 fps | 96.9% |
| ADI Benchmark 8208 | <<locked>> | 82% | 56,536 psi | 89% | 2592 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 54,418 psi | 85% | 2723 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 55,782 psi | 87% | 2621 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 56,159 psi | 88% | 2644 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 96% | 55,941 psi | 88% | 2723 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 92% | 57,566 psi | 90% | 2753 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 55,303 psi | 87% | 2703 fps | 98.9% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 48,704 psi | 76% | 2654 fps | 98.1% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 45,934 psi | 72% | 2595 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 40,089 psi | 63% | 2526 fps | 99.1% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 52,460 psi | 82% | 2776 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 54,114 psi | 85% | 2618 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 44,672 psi | 70% | 2585 fps | 97.2% |
| Bofors RP3 | <<locked>> | 88% | 56,507 psi | 89% | 2638 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 48,704 psi | 76% | 2654 fps | 98.1% |
| Bofors RP7 | <<locked>> | 92% | 56,159 psi | 88% | 2628 fps | 99.5% |
| Hodgdon Benchmark | <<locked>> | 82% | 57,696 psi | 90% | 2566 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 82% | 56,173 psi | 88% | 2621 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 57,188 psi | 90% | 2657 fps | 100% |
| Hodgdon H414 | <<locked>> | 94% | 57,537 psi | 90% | 2726 fps | 99.8% |
| Hodgdon H4350 | <<locked>> | 90% | 54,157 psi | 85% | 2638 fps | 98.9% |
| Hodgdon H4831ᴾ | <<locked>> | 100% | 54,056 psi | 85% | 2661 fps | 97% |
| Hodgdon H4831 SCᴾ | <<locked>> | 100% | 52,852 psi | 83% | 2644 fps | 96.8% |
| Hodgdon H4895 | <<locked>> | 82% | 54,853 psi | 86% | 2605 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 56,173 psi | 88% | 2648 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 54,824 psi | 86% | 2641 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 39,218 psi | 61% | 2546 fps | 96.1% |
| Hodgdon Superformance | <<locked>> | 92% | 53,896 psi | 84% | 2713 fps | 99.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,998 psi | 56% | 1581 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 55,854 psi | 88% | 2605 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 55,332 psi | 87% | 2575 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 54,969 psi | 86% | 2589 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 86% | 57,696 psi | 90% | 2621 fps | 99.8% |
| IMR 4350 | <<locked>> | 96% | 56,898 psi | 89% | 2661 fps | 99.5% |
| IMR 4451 Enduron | <<locked>> | 90% | 54,621 psi | 86% | 2608 fps | 99.5% |
| IMR 4831 | <<locked>> | 96% | 55,390 psi | 87% | 2661 fps | 100% |
| IMR 4895 | <<locked>> | 86% | 57,638 psi | 90% | 2667 fps | 100% |
| IMR 4955 Enduronᴾ | <<locked>> | 100% | 55,840 psi | 88% | 2651 fps | 97.5% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 47,921 psi | 75% | 2631 fps | 96.5% |
| IMR 8208 XBR | <<locked>> | 82% | 56,536 psi | 89% | 2592 fps | 100% |
| Lovex D073.6 | <<locked>> | 82% | 54,215 psi | 85% | 2569 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 56,811 psi | 89% | 2572 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 54,810 psi | 86% | 2579 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 57,624 psi | 90% | 2648 fps | 100% |
| Lovex S070 | <<locked>> | 94% | 55,434 psi | 87% | 2641 fps | 99.7% |
| Lovex S071ᴾ | <<locked>> | 100% | 40,277 psi | 63% | 2438 fps | 98.4% |
| Norma 201 | <<locked>> | 84% | 56,260 psi | 88% | 2589 fps | 100% |
| Norma 202 | <<locked>> | 84% | 56,985 psi | 89% | 2582 fps | 100% |
| Norma 203B | <<locked>> | 86% | 55,376 psi | 87% | 2631 fps | 100% |
| Norma 204 | <<locked>> | 94% | 54,070 psi | 85% | 2664 fps | 98.6% |
| Norma MRPᴾ | <<locked>> | 100% | 51,547 psi | 81% | 2730 fps | 99.5% |
| Norma URP | <<locked>> | 96% | 57,493 psi | 90% | 2707 fps | 100% |
| Ramshot Big Game | <<locked>> | 86% | 56,362 psi | 88% | 2661 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 47,790 psi | 75% | 2641 fps | 96.8% |
| Ramshot Hunter | <<locked>> | 96% | 56,304 psi | 88% | 2713 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 42,206 psi | 66% | 2523 fps | 97.2% |
| Ramshot TAC | <<locked>> | 82% | 56,550 psi | 89% | 2625 fps | 100% |
| Ramshot Wild Boar | <<locked>> | 82% | 56,579 psi | 89% | 2635 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,622 psi | 57% | 1621 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 57,246 psi | 90% | 2648 fps | 99.9% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 57,377 psi | 90% | 2710 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 57,058 psi | 89% | 2740 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 54,723 psi | 86% | 2697 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 57,537 psi | 90% | 2779 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 38,928 psi | 61% | 2539 fps | 97.2% |
| Rottweil R 901 | <<locked>> | 82% | 56,840 psi | 89% | 2556 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 56,753 psi | 89% | 2585 fps | 100% |
| Rottweil R 903 | <<locked>> | 90% | 56,376 psi | 88% | 2631 fps | 100% |
| Rottweil R 904 | <<locked>> | 98% | 54,491 psi | 85% | 2638 fps | 97.8% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 54,534 psi | 85% | 2694 fps | 98.9% |
| Rottweil R 907 | <<locked>> | 92% | 56,159 psi | 88% | 2628 fps | 99.5% |
| Shooters World Long Rifle | <<locked>> | 94% | 57,624 psi | 90% | 2648 fps | 100% |
| Shooters World Match Rifle | <<locked>> | 82% | 54,215 psi | 85% | 2569 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 54,810 psi | 86% | 2579 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 55,434 psi | 87% | 2641 fps | 99.7% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 54,694 psi | 86% | 2644 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 55,303 psi | 87% | 2605 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 56,217 psi | 88% | 2621 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 57,508 psi | 90% | 2520 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 54,795 psi | 86% | 2480 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 57,725 psi | 90% | 2608 fps | 99.8% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 54,041 psi | 85% | 2687 fps | 98.9% |
| Somchem S335 | <<locked>> | 84% | 56,913 psi | 89% | 2516 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 55,056 psi | 86% | 2592 fps | 100% |
| Somchem S355 | <<locked>> | 90% | 56,492 psi | 89% | 2628 fps | 100% |
| Somchem S361 | <<locked>> | 98% | 56,405 psi | 88% | 2635 fps | 97.3% |
| Somchem S365 | <<locked>> | 98% | 56,463 psi | 88% | 2703 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 54,969 psi | 86% | 2667 fps | 99.4% |
| Vihtavuori N133 | <<locked>> | 82% | 54,592 psi | 86% | 2461 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 57,276 psi | 90% | 2543 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 57,624 psi | 90% | 2562 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 54,346 psi | 85% | 2559 fps | 100% |
| Vihtavuori N160 | <<locked>> | 94% | 56,217 psi | 88% | 2651 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 47,384 psi | 74% | 2543 fps | 98.1% |
| Vihtavuori N530 | <<locked>> | 82% | 56,884 psi | 89% | 2589 fps | 100% |
| Vihtavuori N540 | <<locked>> | 86% | 55,680 psi | 87% | 2566 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 55,129 psi | 86% | 2661 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 51,401 psi | 81% | 2664 fps | 100% |
| Vihtavuori N560ᴾ | <<locked>> | 100% | 52,170 psi | 82% | 2720 fps | 97.1% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 56,028 psi | 88% | 2625 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 57,566 psi | 90% | 2638 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 54,143 psi | 85% | 2680 fps | 99.6% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 41,118 psi | 64% | 2644 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 84% | 56,202 psi | 88% | 2628 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 51,634 psi | 81% | 2612 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% | 47,355 psi | 74% | 2428 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 46,195 psi | 72% | 2441 fps | 98% |
| Accurate 3100 | <<locked>> | 86% | 29,921 psi | 47% | 2221 fps | 95.2% |
| Accurate 4064 | <<locked>> | 80% | 44,875 psi | 70% | 2434 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 33,707 psi | 53% | 2316 fps | 98.3% |
| Accurate MAGPRO | <<locked>> | 98% | 47,195 psi | 74% | 2648 fps | 95.3% |
| ADI AR 2206H | <<locked>> | 80% | 50,879 psi | 80% | 2549 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 43,294 psi | 68% | 2421 fps | 99.9% |
| ADI AR 2209 | <<locked>> | 90% | 40,654 psi | 64% | 2457 fps | 95.8% |
| ADI AR 2213 | <<locked>> | 96% | 44,150 psi | 69% | 2549 fps | 95.2% |
| ADI Benchmark 8208 | <<locked>> | 80% | 53,069 psi | 83% | 2546 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 47,108 psi | 74% | 2612 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 43,279 psi | 68% | 2441 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 46,383 psi | 73% | 2503 fps | 100% |
| Alliant Reloder-16 | 57.5 gr | 80% | 33,649 psi | 53% | 2333 fps | 98.5% |
| Alliant Reloder-17 | <<locked>> | 80% | 37,782 psi | 59% | 2444 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 37,666 psi | 59% | 2402 fps | 95% |
| Alliant Reloder-22 | <<locked>> | 92% | 37,434 psi | 59% | 2441 fps | 95.1% |
| Alliant Reloder-23 | <<locked>> | 80% | 24,192 psi | 38% | 2106 fps | 96.1% |
| Alliant Reloder-25 | <<locked>> | 90% | 29,254 psi | 46% | 2264 fps | 95.1% |
| Alliant Reloder-26 | <<locked>> | 82% | 27,311 psi | 43% | 2254 fps | 95.2% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 50,560 psi | 79% | 2569 fps | 100% |
| Bofors RP15 | <<locked>> | 96% | 39,291 psi | 62% | 2480 fps | 95.6% |
| Bofors RP3 | <<locked>> | 80% | 43,163 psi | 68% | 2448 fps | 100% |
| Bofors RP5 | <<locked>> | 92% | 37,434 psi | 59% | 2441 fps | 95.1% |
| Bofors RP7 | <<locked>> | 80% | 38,406 psi | 60% | 2336 fps | 96.4% |
| Hodgdon Benchmark | <<locked>> | 80% | 54,418 psi | 85% | 2523 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 52,460 psi | 82% | 2572 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 43,888 psi | 69% | 2461 fps | 99.6% |
| Hodgdon H414 | <<locked>> | 80% | 35,940 psi | 56% | 2362 fps | 96.4% |
| Hodgdon H4350 | <<locked>> | 80% | 39,102 psi | 61% | 2382 fps | 95.8% |
| Hodgdon H4831 | <<locked>> | 96% | 47,195 psi | 74% | 2552 fps | 95.5% |
| Hodgdon H4831 SC | <<locked>> | 96% | 46,340 psi | 73% | 2539 fps | 95.3% |
| Hodgdon H4895 | <<locked>> | 80% | 51,416 psi | 81% | 2559 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 31,024 psi | 49% | 2234 fps | 98.9% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 47,834 psi | 75% | 2546 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 36,898 psi | 58% | 2490 fps | 95.1% |
| Hodgdon Superformance | 65.4 gr | 80% | 34,954 psi | 55% | 2369 fps | 95.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,934 psi | 42% | 1414 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 49,255 psi | 77% | 2513 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 51,895 psi | 81% | 2533 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 45,527 psi | 71% | 2451 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 47,819 psi | 75% | 2477 fps | 98.8% |
| IMR 4350 | <<locked>> | 80% | 34,301 psi | 54% | 2270 fps | 95% |
| IMR 4451 Enduron | <<locked>> | 80% | 40,001 psi | 63% | 2365 fps | 97.3% |
| IMR 4831 | <<locked>> | 80% | 32,663 psi | 51% | 2277 fps | 98% |
| IMR 4895 | <<locked>> | 80% | 47,572 psi | 75% | 2530 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 46,209 psi | 72% | 2503 fps | 95.5% |
| IMR 7828 SSC | <<locked>> | 98% | 44,802 psi | 70% | 2575 fps | 95.6% |
| IMR 8208 XBR | <<locked>> | 80% | 53,069 psi | 83% | 2546 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 50,734 psi | 80% | 2523 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 50,227 psi | 79% | 2484 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 45,469 psi | 71% | 2444 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 37,304 psi | 58% | 2320 fps | 97.9% |
| Lovex S070 | <<locked>> | 80% | 35,592 psi | 56% | 2303 fps | 96.4% |
| Lovex S071 | <<locked>> | 92% | 31,067 psi | 49% | 2247 fps | 95.7% |
| Norma 201 | <<locked>> | 80% | 49,574 psi | 78% | 2497 fps | 100% |
| Norma 202 | <<locked>> | 80% | 50,212 psi | 79% | 2493 fps | 100% |
| Norma 203B | <<locked>> | 80% | 45,745 psi | 72% | 2490 fps | 100% |
| Norma 204 | <<locked>> | 84% | 38,464 psi | 60% | 2395 fps | 95% |
| Norma MRP | <<locked>> | 88% | 34,142 psi | 54% | 2398 fps | 95.5% |
| Norma URP | <<locked>> | 80% | 34,026 psi | 53% | 2320 fps | 98.2% |
| Ramshot Big Game | <<locked>> | 80% | 45,745 psi | 72% | 2510 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 44,527 psi | 70% | 2582 fps | 95.9% |
| Ramshot Hunter | <<locked>> | 80% | 32,924 psi | 52% | 2303 fps | 96.2% |
| Ramshot Magnum | <<locked>> | 96% | 36,564 psi | 57% | 2408 fps | 95.3% |
| Ramshot TAC | <<locked>> | 80% | 52,910 psi | 83% | 2575 fps | 99.9% |
| Ramshot Wild Boar | <<locked>> | 80% | 52,866 psi | 83% | 2585 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,398 psi | 43% | 1450 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 44,106 psi | 69% | 2448 fps | 98.7% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 49,879 psi | 78% | 2608 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 40,263 psi | 63% | 2493 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 33,475 psi | 52% | 2333 fps | 97.9% |
| ReloadSwiss RS 70 | 62.8 gr | 80% | 32,924 psi | 52% | 2339 fps | 97.3% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 36,289 psi | 57% | 2477 fps | 96.1% |
| Rottweil R 901 | <<locked>> | 80% | 53,519 psi | 84% | 2513 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 47,268 psi | 74% | 2454 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 40,770 psi | 64% | 2402 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 42,177 psi | 66% | 2438 fps | 95% |
| Rottweil R 905 | <<locked>> | 90% | 39,030 psi | 61% | 2434 fps | 95.8% |
| Rottweil R 907 | <<locked>> | 80% | 38,406 psi | 60% | 2336 fps | 96.4% |
| Shooters World Long Rifle | <<locked>> | 80% | 37,304 psi | 58% | 2320 fps | 97.9% |
| Shooters World Match Rifle | <<locked>> | 80% | 50,734 psi | 80% | 2523 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 45,469 psi | 71% | 2444 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 35,592 psi | 56% | 2303 fps | 96.4% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 41,858 psi | 66% | 2451 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 51,561 psi | 81% | 2556 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 49,313 psi | 77% | 2526 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 50,792 psi | 80% | 2434 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 42,699 psi | 67% | 2320 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 36,448 psi | 57% | 2267 fps | 96.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 38,667 psi | 61% | 2431 fps | 95.6% |
| Somchem S335 | <<locked>> | 80% | 50,343 psi | 79% | 2434 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 51,430 psi | 81% | 2543 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 41,234 psi | 65% | 2402 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 46,166 psi | 72% | 2484 fps | 95.2% |
| Somchem S365 | <<locked>> | 80% | 30,458 psi | 48% | 2277 fps | 99.7% |
| Somchem S385 | <<locked>> | 86% | 34,592 psi | 54% | 2316 fps | 95.1% |
| Vihtavuori N133 | <<locked>> | 80% | 51,372 psi | 81% | 2418 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 47,384 psi | 74% | 2421 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 47,790 psi | 75% | 2438 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 39,421 psi | 62% | 2339 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 35,375 psi | 55% | 2316 fps | 98.5% |
| Vihtavuori N165 | <<locked>> | 92% | 36,347 psi | 57% | 2346 fps | 95.3% |
| Vihtavuori N530 | <<locked>> | 80% | 53,229 psi | 83% | 2543 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 45,963 psi | 72% | 2434 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 34,795 psi | 55% | 2320 fps | 98.2% |
| Vihtavuori N555 | <<locked>> | 80% | 26,136 psi | 41% | 2172 fps | 96.2% |
| Vihtavuori N560 | <<locked>> | 96% | 45,701 psi | 72% | 2612 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 34,693 psi | 54% | 2293 fps | 99.7% |
| Winchester 748 | <<locked>> | 80% | 53,679 psi | 84% | 2589 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 36,129 psi | 57% | 2365 fps | 96.4% |
| Winchester StaBALL HD | <<locked>> | 82% | 22,568 psi | 35% | 2123 fps | 95.4% |
| Winchester StaBALL Match | <<locked>> | 80% | 49,153 psi | 77% | 2533 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 39,117 psi | 61% | 2402 fps | 95.4% |
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 115 powders for .340 Weath. Mag. loaded with the .338 | 250gr | Lehigh Defense Controlled Fracturing. ReloadSwiss RS 70 delivers the highest muzzle velocity at 2,779 fps; across all powders the maximum-charge window runs from 1,581 fps to 2,779 fps. Accurate 3100 gives the best case fill at 100 %, and 115 of the 115 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 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-16 rank at the top here: for .340 Weath. Mag. with the .338 | 250gr | Lehigh Defense Controlled Fracturing 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.