Load Specifications
Bullet Manufacturer:North Fork
Bullet Weight:240 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:1:10.5
Load data in caliber .340 Weath. Mag. with .338 | 240gr | NorthFork Bonded Core bullet and 109 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% | 57,116 psi | 90% | 2549 fps | 100% |
| Accurate 2495 | <<locked>> | 86% | 56,507 psi | 89% | 2582 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 54,636 psi | 86% | 2602 fps | 98.7% |
| Accurate 3100ᴾ | <<locked>> | 100% | 46,876 psi | 73% | 2582 fps | 99% |
| Accurate 4064 | <<locked>> | 88% | 56,594 psi | 89% | 2635 fps | 100% |
| Accurate 4350 | <<locked>> | 96% | 56,869 psi | 89% | 2736 fps | 100% |
| ADI AR 2206H | <<locked>> | 84% | 56,202 psi | 88% | 2664 fps | 100% |
| ADI AR 2208 | <<locked>> | 90% | 57,174 psi | 90% | 2667 fps | 100% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 54,520 psi | 85% | 2726 fps | 98.2% |
| ADI Benchmark 8208 | <<locked>> | 82% | 54,911 psi | 86% | 2608 fps | 100% |
| Alliant AR-Comp | <<locked>> | 82% | 56,507 psi | 89% | 2575 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 56,202 psi | 88% | 2789 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 54,128 psi | 85% | 2641 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 54,520 psi | 85% | 2661 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 98% | 57,609 psi | 90% | 2785 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 92% | 55,114 psi | 86% | 2766 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 53,287 psi | 84% | 2710 fps | 98.1% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 46,920 psi | 74% | 2657 fps | 97.2% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 44,353 psi | 70% | 2608 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 38,986 psi | 61% | 2530 fps | 98.2% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 50,169 psi | 79% | 2782 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 55,970 psi | 88% | 2684 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 43,265 psi | 68% | 2589 fps | 96% |
| Bofors RP3 | <<locked>> | 88% | 54,940 psi | 86% | 2657 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 46,920 psi | 74% | 2657 fps | 97.2% |
| Bofors RP7 | <<locked>> | 92% | 54,520 psi | 85% | 2641 fps | 98.9% |
| Hodgdon Benchmark | <<locked>> | 82% | 56,333 psi | 88% | 2589 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 82% | 54,563 psi | 86% | 2641 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 55,608 psi | 87% | 2677 fps | 100% |
| Hodgdon H414 | <<locked>> | 94% | 55,608 psi | 87% | 2736 fps | 99.5% |
| Hodgdon H4350 | <<locked>> | 92% | 55,883 psi | 88% | 2697 fps | 98.7% |
| Hodgdon H4831ᴾ | <<locked>> | 100% | 52,199 psi | 82% | 2664 fps | 95.9% |
| Hodgdon H4895 | <<locked>> | 84% | 56,826 psi | 89% | 2671 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 57,682 psi | 90% | 2707 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 56,652 psi | 89% | 2707 fps | 100% |
| Hodgdon Superformance | <<locked>> | 94% | 55,796 psi | 87% | 2776 fps | 99.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,969 psi | 56% | 1604 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 54,433 psi | 85% | 2628 fps | 100% |
| IMR 3031 | <<locked>> | 84% | 57,159 psi | 90% | 2644 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 56,695 psi | 89% | 2648 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 86% | 56,144 psi | 88% | 2638 fps | 99.4% |
| IMR 4350 | <<locked>> | 96% | 55,114 psi | 86% | 2671 fps | 99% |
| IMR 4451 Enduron | <<locked>> | 92% | 56,405 psi | 88% | 2667 fps | 99.4% |
| IMR 4831 | <<locked>> | 98% | 56,985 psi | 89% | 2723 fps | 100% |
| IMR 4895 | <<locked>> | 86% | 55,941 psi | 88% | 2687 fps | 100% |
| IMR 4955 Enduronᴾ | <<locked>> | 100% | 54,215 psi | 85% | 2657 fps | 96.5% |
| IMR 8208 XBR | <<locked>> | 82% | 54,911 psi | 86% | 2608 fps | 100% |
| Lovex D073.6 | <<locked>> | 84% | 56,275 psi | 88% | 2635 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 55,245 psi | 87% | 2589 fps | 100% |
| Lovex S062 | <<locked>> | 88% | 56,855 psi | 89% | 2644 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 55,941 psi | 88% | 2661 fps | 99.9% |
| Lovex S070 | <<locked>> | 96% | 57,116 psi | 90% | 2700 fps | 99.6% |
| Lovex S071ᴾ | <<locked>> | 100% | 39,030 psi | 61% | 2448 fps | 97.6% |
| Norma 201 | <<locked>> | 84% | 55,013 psi | 86% | 2608 fps | 100% |
| Norma 202 | <<locked>> | 84% | 55,564 psi | 87% | 2605 fps | 100% |
| Norma 203B | <<locked>> | 88% | 57,363 psi | 90% | 2697 fps | 100% |
| Norma 204 | <<locked>> | 96% | 55,666 psi | 87% | 2720 fps | 98.3% |
| Norma MRPᴾ | <<locked>> | 100% | 49,603 psi | 78% | 2736 fps | 98.9% |
| Norma URP | <<locked>> | 96% | 55,477 psi | 87% | 2720 fps | 100% |
| Ramshot Big Game | <<locked>> | 86% | 54,404 psi | 85% | 2677 fps | 100% |
| Ramshot Hunter | <<locked>> | 96% | 54,143 psi | 85% | 2723 fps | 99.7% |
| Ramshot TAC | <<locked>> | 82% | 55,042 psi | 86% | 2641 fps | 99.9% |
| Ramshot Wild Boar | <<locked>> | 82% | 54,955 psi | 86% | 2654 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,608 psi | 57% | 1644 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 55,506 psi | 87% | 2657 fps | 99.6% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 55,419 psi | 87% | 2726 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 54,810 psi | 86% | 2759 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 56,492 psi | 89% | 2759 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 55,405 psi | 87% | 2789 fps | 100% |
| Rottweil R 901 | <<locked>> | 82% | 55,912 psi | 88% | 2585 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 55,535 psi | 87% | 2608 fps | 100% |
| Rottweil R 903 | <<locked>> | 90% | 54,795 psi | 86% | 2651 fps | 100% |
| Rottweil R 904ᴾ | <<locked>> | 100% | 56,173 psi | 88% | 2694 fps | 97.4% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 52,402 psi | 82% | 2697 fps | 98.2% |
| Rottweil R 907 | <<locked>> | 92% | 54,520 psi | 85% | 2641 fps | 98.9% |
| Shooters World Long Rifle | <<locked>> | 94% | 55,941 psi | 88% | 2661 fps | 99.9% |
| Shooters World Match Rifle | <<locked>> | 84% | 56,275 psi | 88% | 2635 fps | 100% |
| Shooters World Precision | <<locked>> | 88% | 56,855 psi | 89% | 2644 fps | 100% |
| Shooters World SW4350 | <<locked>> | 96% | 57,116 psi | 90% | 2700 fps | 99.6% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 56,318 psi | 88% | 2710 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 57,464 psi | 90% | 2671 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 54,636 psi | 86% | 2641 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 56,101 psi | 88% | 2543 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 56,623 psi | 89% | 2543 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 56,115 psi | 88% | 2621 fps | 99.4% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 51,909 psi | 81% | 2694 fps | 98.1% |
| Somchem S335 | <<locked>> | 84% | 55,666 psi | 87% | 2543 fps | 100% |
| Somchem S341 | <<locked>> | 84% | 57,043 psi | 89% | 2657 fps | 100% |
| Somchem S355 | <<locked>> | 90% | 54,998 psi | 86% | 2648 fps | 100% |
| Somchem S361 | <<locked>> | 98% | 54,447 psi | 85% | 2638 fps | 96.3% |
| Somchem S365 | <<locked>> | 98% | 53,969 psi | 85% | 2720 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 53,026 psi | 83% | 2674 fps | 98.8% |
| Vihtavuori N133 | <<locked>> | 84% | 56,507 psi | 89% | 2523 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 55,709 psi | 87% | 2569 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 56,159 psi | 88% | 2585 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 56,217 psi | 88% | 2621 fps | 100% |
| Vihtavuori N160 | <<locked>> | 94% | 54,273 psi | 85% | 2667 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 45,658 psi | 72% | 2549 fps | 97.2% |
| Vihtavuori N530 | <<locked>> | 82% | 55,463 psi | 87% | 2612 fps | 100% |
| Vihtavuori N540 | <<locked>> | 86% | 54,215 psi | 85% | 2585 fps | 100% |
| Vihtavuori N550 | <<locked>> | 96% | 56,956 psi | 89% | 2723 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 49,327 psi | 77% | 2677 fps | 100% |
| Vihtavuori N560ᴾ | <<locked>> | 100% | 50,343 psi | 79% | 2723 fps | 95.9% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 57,696 psi | 90% | 2687 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 55,767 psi | 87% | 2657 fps | 100% |
| Winchester 760 | <<locked>> | 94% | 55,825 psi | 87% | 2740 fps | 99.5% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 39,740 psi | 62% | 2648 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 84% | 54,563 psi | 86% | 2648 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 49,763 psi | 78% | 2618 fps | 97.4% |
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 2015 | <<locked>> | 80% | 53,679 psi | 84% | 2510 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 46,514 psi | 73% | 2454 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 44,962 psi | 70% | 2451 fps | 97.1% |
| Accurate 3100 | <<locked>> | 88% | 31,328 psi | 49% | 2283 fps | 95% |
| Accurate 4064 | <<locked>> | 80% | 43,990 psi | 69% | 2457 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 32,895 psi | 52% | 2329 fps | 97.5% |
| ADI AR 2206H | <<locked>> | 80% | 49,588 psi | 78% | 2569 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 42,177 psi | 66% | 2434 fps | 99.6% |
| ADI AR 2209 | <<locked>> | 92% | 42,105 psi | 66% | 2513 fps | 95.4% |
| ADI Benchmark 8208 | <<locked>> | 80% | 51,692 psi | 81% | 2566 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 52,982 psi | 83% | 2533 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 45,730 psi | 72% | 2628 fps | 99.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 42,337 psi | 66% | 2461 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 45,208 psi | 71% | 2520 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 80% | 32,822 psi | 51% | 2339 fps | 97.6% |
| Alliant Reloder-17 | 60.6 gr | 80% | 36,637 psi | 57% | 2454 fps | 99.7% |
| Alliant Reloder-19 | <<locked>> | 92% | 41,582 psi | 65% | 2510 fps | 95.5% |
| Alliant Reloder-22 | <<locked>> | 96% | 41,220 psi | 65% | 2552 fps | 95.6% |
| Alliant Reloder-23 | <<locked>> | 82% | 25,454 psi | 40% | 2169 fps | 96% |
| Alliant Reloder-25 | <<locked>> | 94% | 32,314 psi | 51% | 2369 fps | 95.7% |
| Alliant Reloder-26 | <<locked>> | 86% | 30,661 psi | 48% | 2375 fps | 96.1% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 49,037 psi | 77% | 2582 fps | 99.9% |
| Bofors RP15 | <<locked>> | 98% | 40,524 psi | 64% | 2536 fps | 95.2% |
| Bofors RP3 | <<locked>> | 80% | 42,163 psi | 66% | 2467 fps | 100% |
| Bofors RP5 | <<locked>> | 96% | 41,220 psi | 65% | 2552 fps | 95.6% |
| Bofors RP7 | <<locked>> | 80% | 37,623 psi | 59% | 2346 fps | 95.4% |
| Hodgdon Benchmark | <<locked>> | 80% | 53,069 psi | 83% | 2546 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 51,140 psi | 80% | 2595 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 42,859 psi | 67% | 2477 fps | 99.1% |
| Hodgdon H414 | <<locked>> | 80% | 34,983 psi | 55% | 2372 fps | 95.3% |
| Hodgdon H4350 | <<locked>> | 82% | 40,727 psi | 64% | 2444 fps | 95.6% |
| Hodgdon H4831 | <<locked>> | 98% | 48,776 psi | 76% | 2608 fps | 95% |
| Hodgdon H4895 | <<locked>> | 80% | 50,111 psi | 79% | 2579 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 30,269 psi | 47% | 2244 fps | 98.2% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 46,470 psi | 73% | 2566 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 36,521 psi | 57% | 2431 fps | 95.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,948 psi | 42% | 1434 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 47,979 psi | 75% | 2533 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 50,488 psi | 79% | 2559 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 44,353 psi | 70% | 2464 fps | 99.8% |
| IMR 4166 Enduron | <<locked>> | 80% | 46,702 psi | 73% | 2490 fps | 98.2% |
| IMR 4350 | <<locked>> | 84% | 38,000 psi | 60% | 2379 fps | 95.5% |
| IMR 4451 Enduron | <<locked>> | 80% | 39,059 psi | 61% | 2379 fps | 96.3% |
| IMR 4831 | <<locked>> | 80% | 31,865 psi | 50% | 2290 fps | 97.2% |
| IMR 4895 | <<locked>> | 80% | 46,340 psi | 73% | 2546 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 47,834 psi | 75% | 2559 fps | 95.1% |
| IMR 8208 XBR | <<locked>> | 80% | 51,692 psi | 81% | 2566 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 49,458 psi | 78% | 2546 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 48,979 psi | 77% | 2500 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 44,367 psi | 70% | 2464 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 36,521 psi | 57% | 2333 fps | 97.1% |
| Lovex S070 | <<locked>> | 80% | 34,838 psi | 55% | 2313 fps | 95.4% |
| Lovex S071 | <<locked>> | 94% | 32,242 psi | 51% | 2306 fps | 95.4% |
| Norma 201 | <<locked>> | 80% | 48,472 psi | 76% | 2516 fps | 100% |
| Norma 202 | <<locked>> | 80% | 49,153 psi | 77% | 2520 fps | 100% |
| Norma 203B | <<locked>> | 80% | 44,570 psi | 70% | 2510 fps | 100% |
| Norma 204 | <<locked>> | 88% | 42,757 psi | 67% | 2510 fps | 95.6% |
| Norma MRP | <<locked>> | 90% | 35,563 psi | 56% | 2461 fps | 95.2% |
| Norma URP | <<locked>> | 80% | 33,098 psi | 52% | 2329 fps | 97.4% |
| Ramshot Big Game | <<locked>> | 80% | 44,498 psi | 70% | 2530 fps | 99.9% |
| Ramshot Hunter | <<locked>> | 80% | 32,169 psi | 50% | 2313 fps | 95.1% |
| Ramshot TAC | <<locked>> | 80% | 51,503 psi | 81% | 2589 fps | 99.7% |
| Ramshot Wild Boar | <<locked>> | 80% | 51,532 psi | 81% | 2605 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,427 psi | 43% | 1470 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 42,931 psi | 67% | 2457 fps | 98% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 48,341 psi | 76% | 2625 fps | 100% |
| ReloadSwiss RS 60 | 60.6 gr | 80% | 38,986 psi | 61% | 2507 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 32,605 psi | 51% | 2346 fps | 97.1% |
| ReloadSwiss RS 70 | 61.6 gr | 80% | 32,256 psi | 51% | 2349 fps | 96.2% |
| Rottweil R 901 | <<locked>> | 80% | 52,678 psi | 83% | 2539 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 46,224 psi | 72% | 2474 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 39,813 psi | 62% | 2418 fps | 99.9% |
| Rottweil R 904 | <<locked>> | 94% | 46,601 psi | 73% | 2546 fps | 95.4% |
| Rottweil R 905 | <<locked>> | 92% | 40,350 psi | 63% | 2493 fps | 95.4% |
| Rottweil R 907 | <<locked>> | 80% | 37,623 psi | 59% | 2346 fps | 95.4% |
| Shooters World Long Rifle | <<locked>> | 80% | 36,521 psi | 57% | 2333 fps | 97.1% |
| Shooters World Match Rifle | <<locked>> | 80% | 49,458 psi | 78% | 2546 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 44,367 psi | 70% | 2464 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 34,838 psi | 55% | 2313 fps | 95.4% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 40,712 psi | 64% | 2467 fps | 99.7% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 50,183 psi | 79% | 2569 fps | 99.8% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 48,051 psi | 75% | 2546 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 49,734 psi | 78% | 2457 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 41,756 psi | 65% | 2343 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 35,708 psi | 56% | 2280 fps | 95.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 39,987 psi | 63% | 2487 fps | 95.2% |
| Somchem S335 | <<locked>> | 80% | 49,226 psi | 77% | 2457 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 49,908 psi | 78% | 2559 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 40,263 psi | 63% | 2418 fps | 99.8% |
| Somchem S361 | <<locked>> | 96% | 51,039 psi | 80% | 2589 fps | 95.5% |
| Somchem S365 | <<locked>> | 80% | 29,718 psi | 47% | 2290 fps | 99.2% |
| Somchem S385 | <<locked>> | 90% | 38,363 psi | 60% | 2428 fps | 95.7% |
| Vihtavuori N133 | <<locked>> | 80% | 50,198 psi | 79% | 2444 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 46,267 psi | 73% | 2444 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 46,557 psi | 73% | 2457 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 38,479 psi | 60% | 2359 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 34,403 psi | 54% | 2326 fps | 97.7% |
| Vihtavuori N165 | <<locked>> | 96% | 40,321 psi | 63% | 2454 fps | 95.8% |
| Vihtavuori N530 | <<locked>> | 80% | 51,895 psi | 81% | 2562 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 44,904 psi | 70% | 2457 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 33,997 psi | 53% | 2333 fps | 97.4% |
| Vihtavuori N555 | <<locked>> | 80% | 25,686 psi | 40% | 2185 fps | 95.1% |
| Vihtavuori N560 | <<locked>> | 98% | 47,108 psi | 74% | 2667 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 33,852 psi | 53% | 2303 fps | 99.3% |
| Winchester 748 | <<locked>> | 80% | 52,185 psi | 82% | 2608 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 35,143 psi | 55% | 2375 fps | 95.3% |
| Winchester StaBALL HD | <<locked>> | 84% | 23,844 psi | 37% | 2185 fps | 95.3% |
| Winchester StaBALL Match | <<locked>> | 80% | 47,703 psi | 75% | 2549 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 40,640 psi | 64% | 2461 fps | 95.1% |
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 109 powders for .340 Weath. Mag. loaded with the .338 | 240gr | NorthFork Bonded Core. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,789 fps; across all powders the maximum-charge window runs from 1,604 fps to 2,789 fps. Accurate 3100 gives the best case fill at 100 %, and 109 of the 109 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 240.0 gr projectile in 0.338" calls for a 1:10.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2209, Alliant Reloder-19 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 | 240gr | NorthFork Bonded Core 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.