Load Specifications
Load data in caliber .340 Weath. Mag. with .338 | 250gr | Nosler Partition bullet and 96 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, Ramshot Grand and Norma MRP.
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.
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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>> | 82% | 56,637 psi | 89% | 2559 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 55,434 psi | 87% | 2605 fps | 99.5% |
| Accurate 3100ᴾ | <<locked>> | 100% | 55,782 psi | 87% | 2694 fps | 100% |
| Accurate 4064 | <<locked>> | 84% | 57,145 psi | 90% | 2615 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 54,317 psi | 85% | 2684 fps | 100% |
| Accurate MAGPROᴾ | <<locked>> | 100% | 54,621 psi | 86% | 2782 fps | 96.9% |
| ADI AR 2208 | <<locked>> | 86% | 56,826 psi | 89% | 2648 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 55,172 psi | 86% | 2730 fps | 99.2% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 56,202 psi | 88% | 2782 fps | 98.6% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 36,216 psi | 57% | 2470 fps | 97% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 56,405 psi | 88% | 2769 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 54,476 psi | 85% | 2625 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 54,650 psi | 86% | 2648 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 54,926 psi | 86% | 2733 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 56,289 psi | 88% | 2753 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 54,520 psi | 85% | 2720 fps | 99.2% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 55,259 psi | 87% | 2776 fps | 99.4% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 52,272 psi | 82% | 2703 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 45,397 psi | 71% | 2651 fps | 99.9% |
| Alliant Reloder-26 | <<locked>> | 98% | 56,333 psi | 88% | 2844 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 50,749 psi | 80% | 2710 fps | 98.8% |
| Bofors RP3 | <<locked>> | 84% | 55,230 psi | 87% | 2641 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 41,423 psi | 65% | 2579 fps | 96.3% |
| Bofors RP5ᴾ | <<locked>> | 100% | 55,259 psi | 87% | 2776 fps | 99.4% |
| Bofors RP7 | <<locked>> | 88% | 54,607 psi | 86% | 2635 fps | 99.6% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 42,163 psi | 66% | 2536 fps | 96.3% |
| Hodgdon H380 | <<locked>> | 84% | 55,463 psi | 87% | 2661 fps | 100% |
| Hodgdon H414 | <<locked>> | 88% | 57,595 psi | 90% | 2753 fps | 100% |
| Hodgdon H4350 | <<locked>> | 90% | 54,447 psi | 85% | 2671 fps | 99.3% |
| Hodgdon H4831ᴾ | <<locked>> | 100% | 51,924 psi | 81% | 2661 fps | 97.3% |
| Hodgdon H4831 SC | <<locked>> | 98% | 55,274 psi | 87% | 2710 fps | 97.8% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 55,317 psi | 87% | 2657 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 57,072 psi | 89% | 2690 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 44,512 psi | 70% | 2694 fps | 98.5% |
| Hodgdon Superformance | <<locked>> | 90% | 56,565 psi | 89% | 2772 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,637 psi | 57% | 1624 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 56,579 psi | 89% | 2638 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 56,159 psi | 88% | 2605 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 55,782 psi | 87% | 2625 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 86% | 54,578 psi | 86% | 2612 fps | 99.8% |
| IMR 4350 | <<locked>> | 92% | 55,550 psi | 87% | 2671 fps | 99.7% |
| IMR 4451 Enduron | <<locked>> | 88% | 56,028 psi | 88% | 2657 fps | 99.8% |
| IMR 4831 | <<locked>> | 96% | 55,579 psi | 87% | 2687 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 56,086 psi | 88% | 2671 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 54,621 psi | 86% | 2664 fps | 97.9% |
| IMR 7828 SSC | <<locked>> | 98% | 54,128 psi | 85% | 2762 fps | 98.4% |
| Lovex S062 | <<locked>> | 84% | 56,652 psi | 89% | 2621 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 56,275 psi | 88% | 2654 fps | 100% |
| Lovex S070 | <<locked>> | 92% | 57,696 psi | 90% | 2697 fps | 100% |
| Lovex S071ᴾ | <<locked>> | 100% | 46,369 psi | 73% | 2559 fps | 99.6% |
| Norma 203B | <<locked>> | 84% | 57,450 psi | 90% | 2680 fps | 100% |
| Norma 204 | <<locked>> | 92% | 56,289 psi | 88% | 2723 fps | 99.2% |
| Norma MRP | <<locked>> | 98% | 54,984 psi | 86% | 2805 fps | 99.9% |
| Norma URP | <<locked>> | 92% | 56,579 psi | 89% | 2717 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 54,447 psi | 85% | 2657 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 53,809 psi | 84% | 2769 fps | 98.6% |
| Ramshot Hunter | <<locked>> | 92% | 55,303 psi | 87% | 2723 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 54,375 psi | 85% | 2749 fps | 99.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,304 psi | 58% | 1663 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 55,390 psi | 87% | 2648 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 55,709 psi | 87% | 2743 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 54,027 psi | 85% | 2707 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 56,217 psi | 88% | 2785 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 44,425 psi | 70% | 2687 fps | 99.3% |
| Rottweil R 902 | <<locked>> | 82% | 55,230 psi | 87% | 2589 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 55,332 psi | 87% | 2638 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 56,782 psi | 89% | 2700 fps | 98.6% |
| Rottweil R 905 | <<locked>> | 98% | 57,435 psi | 90% | 2759 fps | 99.5% |
| Rottweil R 907 | <<locked>> | 88% | 54,607 psi | 86% | 2635 fps | 99.6% |
| Shooters World Long Rifle | <<locked>> | 90% | 56,275 psi | 88% | 2654 fps | 100% |
| Shooters World Precision | <<locked>> | 84% | 56,652 psi | 89% | 2621 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 57,696 psi | 90% | 2697 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 56,797 psi | 89% | 2694 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 57,725 psi | 90% | 2664 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 56,130 psi | 88% | 2520 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 55,825 psi | 87% | 2612 fps | 99.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 56,942 psi | 89% | 2756 fps | 99.5% |
| Somchem S355 | <<locked>> | 86% | 55,332 psi | 87% | 2635 fps | 100% |
| Somchem S361 | <<locked>> | 94% | 54,839 psi | 86% | 2644 fps | 97.7% |
| Somchem S365 | <<locked>> | 94% | 56,101 psi | 88% | 2717 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 54,346 psi | 85% | 2684 fps | 99.6% |
| Unknown powder | <<locked>> | 90% | 57,174 psi | 90% | 2720 fps | 100% |
| Vihtavuori N135 | <<locked>> | 82% | 55,680 psi | 87% | 2543 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 55,695 psi | 87% | 2559 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 56,507 psi | 89% | 2608 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 55,085 psi | 86% | 2661 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 53,606 psi | 84% | 2661 fps | 99.4% |
| Vihtavuori N540 | <<locked>> | 84% | 57,319 psi | 90% | 2605 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 54,012 psi | 85% | 2667 fps | 100% |
| Vihtavuori N555 | <<locked>> | 98% | 54,911 psi | 86% | 2726 fps | 100% |
| Vihtavuori N560 | <<locked>> | 98% | 55,245 psi | 87% | 2795 fps | 98.2% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 47,239 psi | 74% | 2661 fps | 96.9% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 54,520 psi | 85% | 2628 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 57,595 psi | 90% | 2753 fps | 100% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 47,543 psi | 75% | 2772 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 56,246 psi | 88% | 2707 fps | 99.3% |
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% | 53,316 psi | 84% | 2516 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 45,498 psi | 71% | 2451 fps | 98.3% |
| Accurate 3100 | <<locked>> | 80% | 28,514 psi | 45% | 2195 fps | 95.1% |
| Accurate 4064 | <<locked>> | 80% | 50,546 psi | 79% | 2530 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 38,769 psi | 61% | 2431 fps | 99.5% |
| Accurate MAGPRO | <<locked>> | 96% | 47,456 psi | 74% | 2667 fps | 95.3% |
| ADI AR 2208 | <<locked>> | 80% | 47,427 psi | 74% | 2513 fps | 100% |
| ADI AR 2209 | <<locked>> | 84% | 37,391 psi | 59% | 2415 fps | 95.4% |
| ADI AR 2213 | <<locked>> | 92% | 43,265 psi | 68% | 2562 fps | 95.8% |
| ADI AR 2225 | <<locked>> | 96% | 32,010 psi | 50% | 2362 fps | 95% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 52,591 psi | 82% | 2717 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 48,037 psi | 75% | 2533 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 51,314 psi | 80% | 2598 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 37,579 psi | 59% | 2438 fps | 99.6% |
| Alliant Reloder-17 | <<locked>> | 80% | 42,627 psi | 67% | 2552 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 37,231 psi | 58% | 2411 fps | 95.5% |
| Alliant Reloder-22 | <<locked>> | 88% | 37,202 psi | 58% | 2457 fps | 95.7% |
| Alliant Reloder-23 | <<locked>> | 80% | 27,644 psi | 43% | 2224 fps | 98.3% |
| Alliant Reloder-25 | <<locked>> | 86% | 29,341 psi | 46% | 2287 fps | 95.9% |
| Alliant Reloder-26 | 68.9 gr | 80% | 29,443 psi | 46% | 2333 fps | 97% |
| Bofors RP15 | <<locked>> | 90% | 36,883 psi | 58% | 2448 fps | 95.4% |
| Bofors RP3 | <<locked>> | 80% | 48,544 psi | 76% | 2549 fps | 100% |
| Bofors RP30 | <<locked>> | 98% | 38,798 psi | 61% | 2526 fps | 95.4% |
| Bofors RP5 | <<locked>> | 88% | 37,202 psi | 58% | 2457 fps | 95.7% |
| Bofors RP7 | <<locked>> | 80% | 42,583 psi | 67% | 2438 fps | 98% |
| Hodgdon H1000 | <<locked>> | 98% | 39,494 psi | 62% | 2480 fps | 95.4% |
| Hodgdon H380 | <<locked>> | 80% | 48,805 psi | 76% | 2562 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 44,077 psi | 69% | 2539 fps | 98.8% |
| Hodgdon H4350 | <<locked>> | 80% | 40,030 psi | 63% | 2421 fps | 96.7% |
| Hodgdon H4831 | <<locked>> | 94% | 42,873 psi | 67% | 2507 fps | 95% |
| Hodgdon H4831 SC | <<locked>> | 92% | 45,382 psi | 71% | 2552 fps | 95.8% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 35,201 psi | 55% | 2339 fps | 99.8% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 50,285 psi | 79% | 2598 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 94% | 36,840 psi | 58% | 2520 fps | 96% |
| Hodgdon Superformance | <<locked>> | 80% | 39,349 psi | 62% | 2487 fps | 97.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,398 psi | 43% | 1450 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 50,082 psi | 78% | 2549 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 52,750 psi | 83% | 2562 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 46,630 psi | 73% | 2490 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 45,629 psi | 72% | 2467 fps | 98.9% |
| IMR 4350 | <<locked>> | 80% | 38,159 psi | 60% | 2372 fps | 96.9% |
| IMR 4451 Enduron | <<locked>> | 80% | 43,947 psi | 69% | 2464 fps | 98.6% |
| IMR 4831 | <<locked>> | 80% | 33,692 psi | 53% | 2313 fps | 98.6% |
| IMR 4895 | <<locked>> | 80% | 52,663 psi | 83% | 2625 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 88% | 42,583 psi | 67% | 2464 fps | 95.1% |
| IMR 7828 SSC | <<locked>> | 90% | 41,321 psi | 65% | 2536 fps | 95.3% |
| Lovex S062 | <<locked>> | 80% | 50,140 psi | 79% | 2536 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 41,539 psi | 65% | 2421 fps | 99.1% |
| Lovex S070 | <<locked>> | 80% | 39,769 psi | 62% | 2408 fps | 98% |
| Lovex S071 | <<locked>> | 86% | 29,733 psi | 47% | 2224 fps | 95.7% |
| Norma 203B | <<locked>> | 80% | 50,676 psi | 79% | 2585 fps | 100% |
| Norma 204 | <<locked>> | 80% | 37,652 psi | 59% | 2402 fps | 95.4% |
| Norma MRP | 68.5 gr | 82% | 31,792 psi | 50% | 2359 fps | 95.1% |
| Norma URP | <<locked>> | 80% | 38,450 psi | 60% | 2425 fps | 99.4% |
| Ramshot Big Game | <<locked>> | 80% | 50,894 psi | 80% | 2608 fps | 100% |
| Ramshot Grand | 75.8 gr | 88% | 40,161 psi | 63% | 2526 fps | 95.3% |
| Ramshot Hunter | <<locked>> | 80% | 37,231 psi | 58% | 2418 fps | 98.1% |
| Ramshot Magnum | <<locked>> | 88% | 34,737 psi | 54% | 2395 fps | 95.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,905 psi | 44% | 1486 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 48,588 psi | 76% | 2546 fps | 99.6% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 45,252 psi | 71% | 2595 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 38,363 psi | 60% | 2448 fps | 99.3% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 37,072 psi | 58% | 2457 fps | 99% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 33,721 psi | 53% | 2441 fps | 95.8% |
| Rottweil R 902 | <<locked>> | 80% | 52,040 psi | 82% | 2546 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 45,745 psi | 72% | 2500 fps | 100% |
| Rottweil R 904 | <<locked>> | 86% | 41,423 psi | 65% | 2448 fps | 95.5% |
| Rottweil R 905 | <<locked>> | 84% | 36,289 psi | 57% | 2395 fps | 95.4% |
| Rottweil R 907 | <<locked>> | 80% | 42,583 psi | 67% | 2438 fps | 98% |
| Shooters World Long Rifle | <<locked>> | 80% | 41,539 psi | 65% | 2421 fps | 99.1% |
| Shooters World Precision | <<locked>> | 80% | 50,140 psi | 79% | 2536 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 39,769 psi | 62% | 2408 fps | 98% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 46,862 psi | 73% | 2552 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 54,288 psi | 85% | 2618 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 46,818 psi | 73% | 2398 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 40,582 psi | 64% | 2369 fps | 98% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 35,955 psi | 56% | 2392 fps | 95.3% |
| Somchem S355 | <<locked>> | 80% | 45,948 psi | 72% | 2497 fps | 100% |
| Somchem S361 | <<locked>> | 88% | 45,092 psi | 71% | 2490 fps | 95.6% |
| Somchem S365 | <<locked>> | 80% | 34,867 psi | 55% | 2385 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 34,563 psi | 54% | 2329 fps | 95.7% |
| Unknown powder | <<locked>> | 80% | 41,379 psi | 65% | 2474 fps | 99.5% |
| Vihtavuori N135 | <<locked>> | 80% | 52,417 psi | 82% | 2503 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 52,489 psi | 82% | 2520 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 43,874 psi | 69% | 2431 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 39,842 psi | 62% | 2421 fps | 99.5% |
| Vihtavuori N165 | <<locked>> | 86% | 33,982 psi | 53% | 2313 fps | 95% |
| Vihtavuori N540 | <<locked>> | 80% | 50,705 psi | 79% | 2520 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 39,276 psi | 62% | 2425 fps | 99.4% |
| Vihtavuori N555 | <<locked>> | 80% | 30,560 psi | 48% | 2293 fps | 98.3% |
| Vihtavuori N560 | <<locked>> | 90% | 42,192 psi | 66% | 2572 fps | 95.2% |
| Vihtavuori N565 | <<locked>> | 96% | 41,234 psi | 65% | 2549 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 38,725 psi | 61% | 2388 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 44,077 psi | 69% | 2539 fps | 98.8% |
| Winchester StaBALL HD | <<locked>> | 80% | 24,439 psi | 38% | 2215 fps | 97.8% |
| Winchester Supreme 780 | <<locked>> | 84% | 36,709 psi | 58% | 2379 fps | 95.3% |
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 96 powders for .340 Weath. Mag. loaded with the .338 | 250gr | Nosler Partition. Alliant Reloder-26 delivers the highest muzzle velocity at 2,844 fps; across all powders the maximum-charge window runs from 1,624 fps to 2,844 fps. Accurate 3100 gives the best case fill at 100 %, and 96 of the 96 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 1:15.0 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, Ramshot Grand, Norma MRP rank at the top here: for .340 Weath. Mag. with the .338 | 250gr | Nosler Partition 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.