Load Specifications
Load data in caliber .338 Win Mag. with .338 | 185gr | Fox Classic Hunter bullet and 94 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Power Pro 2000-MR, ReloadSwiss RS 52 and Hodgdon LEVERevolution.
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: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 90% | 56,159 psi | 90% | 2831 fps | 100% |
| Accurate 2200 | <<locked>> | 82% | 56,333 psi | 90% | 2930 fps | 99% |
| Accurate 2460 | <<locked>> | 86% | 54,491 psi | 87% | 2854 fps | 100% |
| Accurate 2495 | <<locked>> | 94% | 52,837 psi | 85% | 2838 fps | 100% |
| Accurate 2520 | <<locked>> | 90% | 56,275 psi | 90% | 2913 fps | 100% |
| Accurate 4064 | <<locked>> | 98% | 56,304 psi | 90% | 2927 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 45,179 psi | 72% | 2818 fps | 96.8% |
| Accurate LT-30 | <<locked>> | 84% | 56,028 psi | 90% | 2779 fps | 100% |
| Accurate LT-32 | <<locked>> | 84% | 56,434 psi | 90% | 2805 fps | 100% |
| ADI AR 2206H | <<locked>> | 92% | 55,303 psi | 89% | 2920 fps | 99.4% |
| ADI AR 2208 | <<locked>> | 98% | 56,260 psi | 90% | 2913 fps | 99.1% |
| ADI AR 2219 | <<locked>> | 82% | 53,127 psi | 85% | 2851 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 90% | 54,563 psi | 87% | 2877 fps | 99.8% |
| Alliant AR-Comp | <<locked>> | 90% | 54,201 psi | 87% | 2861 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 86% | 56,101 psi | 90% | 2986 fps | 99.7% |
| Alliant Power Pro 2000-MR | <<locked>> | 94% | 54,897 psi | 88% | 3028 fps | 98.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 98% | 55,492 psi | 89% | 2933 fps | 99.8% |
| Alliant Reloder-10x | <<locked>> | 86% | 55,970 psi | 90% | 2841 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 96% | 56,362 psi | 90% | 2956 fps | 99.2% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 45,310 psi | 73% | 2828 fps | 96.9% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 52,562 psi | 84% | 2989 fps | 99.5% |
| Baschieri & Pellagri 106 | <<locked>> | 84% | 55,332 psi | 89% | 2779 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 92% | 55,114 psi | 88% | 2930 fps | 98.7% |
| Bofors RP3 | <<locked>> | 98% | 55,883 psi | 90% | 2949 fps | 99.8% |
| Hodgdon Benchmark | <<locked>> | 88% | 53,563 psi | 86% | 2818 fps | 99.9% |
| Hodgdon BL-C2 | <<locked>> | 90% | 53,301 psi | 85% | 2904 fps | 99.9% |
| Hodgdon CFE223 | <<locked>> | 88% | 55,143 psi | 88% | 2999 fps | 99.1% |
| Hodgdon H322 | <<locked>> | 86% | 55,245 psi | 89% | 2881 fps | 100% |
| Hodgdon H335 | <<locked>> | 84% | 52,707 psi | 85% | 2854 fps | 100% |
| Hodgdon H380 | <<locked>> | 96% | 53,824 psi | 86% | 2904 fps | 97.9% |
| Hodgdon H4895 | <<locked>> | 92% | 55,782 psi | 89% | 2933 fps | 99.7% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 41,466 psi | 66% | 2713 fps | 97.6% |
| Hodgdon LEVERevolution | <<locked>> | 94% | 54,549 psi | 87% | 2959 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,316 psi | 55% | 1745 fps | 100% |
| Hodgdon VARGET | <<locked>> | 92% | 53,911 psi | 86% | 2884 fps | 99.5% |
| IMR 3031 | <<locked>> | 92% | 55,013 psi | 88% | 2923 fps | 100% |
| IMR 4064 | <<locked>> | 96% | 55,767 psi | 89% | 2897 fps | 99.2% |
| IMR 4198 | <<locked>> | 84% | 53,374 psi | 86% | 2759 fps | 100% |
| IMR 4451 Enduronᴾ | <<locked>> | 100% | 55,564 psi | 89% | 2890 fps | 95.9% |
| IMR 4831ᴾ | <<locked>> | 100% | 43,395 psi | 70% | 2766 fps | 96.4% |
| IMR 4895 | <<locked>> | 94% | 54,099 psi | 87% | 2936 fps | 99.4% |
| IMR 8208 XBR | <<locked>> | 90% | 54,563 psi | 87% | 2877 fps | 99.8% |
| Lovex D073.5 | <<locked>> | 86% | 54,694 psi | 88% | 2867 fps | 100% |
| Lovex D073.6 | <<locked>> | 92% | 54,259 psi | 87% | 2897 fps | 100% |
| Lovex S060 | <<locked>> | 92% | 55,593 psi | 89% | 2851 fps | 99.4% |
| Lovex S062 | <<locked>> | 96% | 54,882 psi | 88% | 2894 fps | 99.9% |
| Lovex S065ᴾ | <<locked>> | 100% | 50,647 psi | 81% | 2822 fps | 96.5% |
| Norma 200 | <<locked>> | 82% | 55,680 psi | 89% | 2812 fps | 100% |
| Norma 201 | <<locked>> | 92% | 53,693 psi | 86% | 2864 fps | 99.8% |
| Norma 202 | <<locked>> | 92% | 54,375 psi | 87% | 2874 fps | 100% |
| Norma 203B | <<locked>> | 96% | 55,463 psi | 89% | 2943 fps | 99.4% |
| Norma URPᴾ | <<locked>> | 100% | 45,498 psi | 73% | 2818 fps | 96.7% |
| Ramshot Big Game | <<locked>> | 96% | 56,057 psi | 90% | 2969 fps | 99.4% |
| Ramshot TAC | <<locked>> | 90% | 55,317 psi | 89% | 2890 fps | 97.6% |
| Ramshot Wild Boar | <<locked>> | 90% | 54,331 psi | 87% | 2907 fps | 99.3% |
| Ramshot X-Terminator | <<locked>> | 88% | 56,101 psi | 90% | 2881 fps | 99.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,679 psi | 56% | 1788 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 86% | 54,230 psi | 87% | 2864 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 96% | 54,621 psi | 88% | 2884 fps | 96.5% |
| ReloadSwiss RS 52 | <<locked>> | 92% | 52,605 psi | 84% | 2966 fps | 98.8% |
| ReloadSwiss RS 60ᴾ | <<locked>> | 100% | 56,217 psi | 90% | 3058 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 45,107 psi | 72% | 2838 fps | 96.4% |
| Rottweil R 901 | <<locked>> | 90% | 54,650 psi | 88% | 2851 fps | 100% |
| Rottweil R 902 | <<locked>> | 94% | 53,983 psi | 87% | 2858 fps | 99.8% |
| Rottweil R 903ᴾ | <<locked>> | 100% | 55,477 psi | 89% | 2936 fps | 99.7% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 50,647 psi | 81% | 2822 fps | 96.5% |
| Shooters World Match Rifle | <<locked>> | 92% | 54,259 psi | 87% | 2897 fps | 100% |
| Shooters World Precision | <<locked>> | 96% | 54,882 psi | 88% | 2894 fps | 99.9% |
| Shooters World Tactical Rifle | <<locked>> | 84% | 54,346 psi | 87% | 2835 fps | 99.7% |
| SNPE Vectan BA6 1/2 | <<locked>> | 82% | 56,217 psi | 90% | 2530 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 82% | 53,476 psi | 86% | 2861 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 98% | 53,998 psi | 87% | 2946 fps | 99.2% |
| SNPE Vectan SP 3 | <<locked>> | 84% | 53,795 psi | 86% | 2818 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 90% | 53,142 psi | 85% | 2861 fps | 97.7% |
| SNPE Vectan SP 9 | <<locked>> | 92% | 53,679 psi | 86% | 2887 fps | 99.2% |
| SNPE Vectan Tubal 3000 | <<locked>> | 92% | 56,217 psi | 90% | 2818 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 98% | 55,724 psi | 89% | 2808 fps | 100% |
| Somchem S321 | <<locked>> | 88% | 55,912 psi | 90% | 2913 fps | 99.9% |
| Somchem S335 | <<locked>> | 92% | 54,955 psi | 88% | 2812 fps | 100% |
| Somchem S341 | <<locked>> | 92% | 56,391 psi | 90% | 2913 fps | 99.4% |
| Somchem S355ᴾ | <<locked>> | 100% | 55,927 psi | 90% | 2933 fps | 99.7% |
| Somchem S365ᴾ | <<locked>> | 100% | 40,292 psi | 65% | 2759 fps | 98.6% |
| Vihtavuori N130 | <<locked>> | 88% | 55,883 psi | 90% | 2785 fps | 100% |
| Vihtavuori N133 | <<locked>> | 92% | 56,144 psi | 90% | 2805 fps | 100% |
| Vihtavuori N135 | <<locked>> | 94% | 53,330 psi | 86% | 2835 fps | 100% |
| Vihtavuori N140 | <<locked>> | 94% | 54,737 psi | 88% | 2851 fps | 100% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 54,389 psi | 87% | 2867 fps | 99.9% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 47,993 psi | 77% | 2822 fps | 97.2% |
| Vihtavuori N530 | <<locked>> | 90% | 55,230 psi | 89% | 2877 fps | 99.9% |
| Vihtavuori N540 | <<locked>> | 94% | 52,968 psi | 85% | 2844 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 47,065 psi | 75% | 2822 fps | 96.8% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 49,414 psi | 79% | 2815 fps | 99.1% |
| Winchester 748 | <<locked>> | 90% | 54,462 psi | 87% | 2923 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 92% | 53,417 psi | 86% | 2897 fps | 99.5% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 80% | 40,872 psi | 66% | 2595 fps | 100% |
| Accurate 2200 | <<locked>> | 80% | 52,866 psi | 85% | 2874 fps | 98.5% |
| Accurate 2460 | <<locked>> | 80% | 44,295 psi | 71% | 2694 fps | 99.8% |
| Accurate 2495 | <<locked>> | 80% | 32,967 psi | 53% | 2490 fps | 99.9% |
| Accurate 2520 | <<locked>> | 80% | 39,668 psi | 64% | 2641 fps | 99.2% |
| Accurate 4064 | <<locked>> | 80% | 31,241 psi | 50% | 2467 fps | 98.2% |
| Accurate 4350 | <<locked>> | 96% | 39,131 psi | 63% | 2700 fps | 95.1% |
| Accurate LT-30 | <<locked>> | 80% | 49,530 psi | 79% | 2687 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 49,893 psi | 80% | 2707 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 37,478 psi | 60% | 2589 fps | 96% |
| ADI AR 2208 | <<locked>> | 86% | 38,725 psi | 62% | 2598 fps | 95.5% |
| ADI AR 2219 | <<locked>> | 80% | 49,617 psi | 80% | 2795 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 80% | 39,566 psi | 63% | 2612 fps | 97.8% |
| Alliant AR-Comp | <<locked>> | 80% | 38,638 psi | 62% | 2621 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 45,803 psi | 73% | 2808 fps | 98.6% |
| Alliant Power Pro 2000-MR | 60.7 gr | 84% | 38,914 psi | 62% | 2710 fps | 95% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 33,040 psi | 53% | 2507 fps | 95.5% |
| Alliant Reloder-10x | <<locked>> | 80% | 46,499 psi | 75% | 2700 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 38,101 psi | 61% | 2625 fps | 95.6% |
| Alliant Reloder-16 | <<locked>> | 96% | 40,118 psi | 64% | 2717 fps | 95.2% |
| Alliant Reloder-17 | <<locked>> | 88% | 35,027 psi | 56% | 2625 fps | 95.3% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 48,660 psi | 78% | 2680 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 39,102 psi | 63% | 2641 fps | 95.2% |
| Bofors RP3 | <<locked>> | 82% | 32,184 psi | 52% | 2500 fps | 95.3% |
| Hodgdon Benchmark | <<locked>> | 80% | 41,713 psi | 67% | 2612 fps | 98.8% |
| Hodgdon BL-C2 | <<locked>> | 80% | 37,695 psi | 60% | 2621 fps | 98% |
| Hodgdon CFE223 | <<locked>> | 80% | 41,437 psi | 66% | 2749 fps | 96.5% |
| Hodgdon H322 | <<locked>> | 80% | 45,368 psi | 73% | 2730 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 46,166 psi | 74% | 2749 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 41,162 psi | 66% | 2677 fps | 95% |
| Hodgdon H4895 | <<locked>> | 80% | 37,768 psi | 61% | 2602 fps | 96.7% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 34,272 psi | 55% | 2549 fps | 95.1% |
| Hodgdon LEVERevolution | 56.7 gr | 80% | 33,895 psi | 54% | 2559 fps | 95.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,512 psi | 41% | 1562 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 36,579 psi | 59% | 2559 fps | 96.2% |
| IMR 3031 | <<locked>> | 80% | 36,709 psi | 59% | 2612 fps | 99.9% |
| IMR 4064 | <<locked>> | 84% | 38,159 psi | 61% | 2579 fps | 95.6% |
| IMR 4198 | <<locked>> | 80% | 47,210 psi | 76% | 2667 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 98% | 52,098 psi | 84% | 2835 fps | 95.1% |
| IMR 4831 | <<locked>> | 98% | 40,466 psi | 65% | 2707 fps | 95.6% |
| IMR 4895 | <<locked>> | 82% | 36,608 psi | 59% | 2602 fps | 95.8% |
| IMR 8208 XBR | <<locked>> | 80% | 39,566 psi | 63% | 2612 fps | 97.8% |
| Lovex D073.5 | <<locked>> | 80% | 44,222 psi | 71% | 2697 fps | 99.4% |
| Lovex D073.6 | <<locked>> | 80% | 35,766 psi | 57% | 2569 fps | 98.5% |
| Lovex S060 | <<locked>> | 80% | 38,479 psi | 62% | 2543 fps | 96.3% |
| Lovex S062 | <<locked>> | 80% | 33,098 psi | 53% | 2477 fps | 96% |
| Lovex S065 | <<locked>> | 96% | 44,788 psi | 72% | 2717 fps | 95% |
| Norma 200 | <<locked>> | 80% | 52,330 psi | 84% | 2762 fps | 100% |
| Norma 201 | <<locked>> | 80% | 36,738 psi | 59% | 2549 fps | 97.2% |
| Norma 202 | <<locked>> | 80% | 36,883 psi | 59% | 2569 fps | 99.1% |
| Norma 203B | <<locked>> | 82% | 35,114 psi | 56% | 2559 fps | 95.2% |
| Norma URP | <<locked>> | 96% | 39,914 psi | 64% | 2703 fps | 95.1% |
| Ramshot Big Game | <<locked>> | 84% | 37,217 psi | 60% | 2625 fps | 95.6% |
| Ramshot TAC | <<locked>> | 84% | 45,237 psi | 73% | 2717 fps | 95.4% |
| Ramshot Wild Boar | <<locked>> | 80% | 38,696 psi | 62% | 2625 fps | 96.3% |
| Ramshot X-Terminator | <<locked>> | 80% | 43,033 psi | 69% | 2661 fps | 97.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,556 psi | 41% | 1598 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 44,585 psi | 71% | 2703 fps | 99.6% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 47,877 psi | 77% | 2772 fps | 95% |
| ReloadSwiss RS 52 | 57.4 gr | 82% | 36,999 psi | 59% | 2664 fps | 95.1% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 30,545 psi | 49% | 2513 fps | 95.9% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 42,105 psi | 68% | 2776 fps | 95.5% |
| Rottweil R 901 | <<locked>> | 80% | 40,176 psi | 64% | 2605 fps | 99.4% |
| Rottweil R 902 | <<locked>> | 80% | 34,838 psi | 56% | 2497 fps | 96.6% |
| Rottweil R 903 | <<locked>> | 84% | 32,271 psi | 52% | 2493 fps | 95% |
| Shooters World Long Rifle | <<locked>> | 96% | 44,788 psi | 72% | 2717 fps | 95% |
| Shooters World Match Rifle | <<locked>> | 80% | 35,766 psi | 57% | 2569 fps | 98.5% |
| Shooters World Precision | <<locked>> | 80% | 33,098 psi | 53% | 2477 fps | 96% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 47,268 psi | 76% | 2720 fps | 99% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 53,359 psi | 86% | 2493 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 50,096 psi | 80% | 2808 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 36,201 psi | 58% | 2608 fps | 95.3% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 47,326 psi | 76% | 2720 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 43,018 psi | 69% | 2684 fps | 95.4% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 36,143 psi | 58% | 2559 fps | 95.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 38,522 psi | 62% | 2526 fps | 99.3% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 31,531 psi | 51% | 2385 fps | 98.8% |
| Somchem S321 | <<locked>> | 80% | 42,554 psi | 68% | 2690 fps | 98.7% |
| Somchem S335 | <<locked>> | 80% | 37,985 psi | 61% | 2530 fps | 99.7% |
| Somchem S341 | <<locked>> | 80% | 37,217 psi | 60% | 2572 fps | 95.8% |
| Somchem S355 | <<locked>> | 84% | 33,504 psi | 54% | 2510 fps | 95.2% |
| Somchem S365 | <<locked>> | 92% | 30,980 psi | 50% | 2530 fps | 95.4% |
| Vihtavuori N130 | <<locked>> | 80% | 43,772 psi | 70% | 2608 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 38,682 psi | 62% | 2530 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 33,779 psi | 54% | 2500 fps | 99.9% |
| Vihtavuori N140 | <<locked>> | 80% | 34,708 psi | 56% | 2500 fps | 99% |
| Vihtavuori N150 | <<locked>> | 82% | 29,820 psi | 48% | 2395 fps | 95.3% |
| Vihtavuori N160 | <<locked>> | 96% | 42,061 psi | 67% | 2710 fps | 95.6% |
| Vihtavuori N530 | <<locked>> | 80% | 39,436 psi | 63% | 2605 fps | 97.9% |
| Vihtavuori N540 | <<locked>> | 80% | 33,388 psi | 54% | 2484 fps | 98.3% |
| Vihtavuori N550 | <<locked>> | 96% | 41,060 psi | 66% | 2710 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 35,244 psi | 57% | 2533 fps | 95.6% |
| Winchester 748 | <<locked>> | 80% | 38,493 psi | 62% | 2644 fps | 98.4% |
| Winchester StaBALL Match | <<locked>> | 80% | 35,288 psi | 57% | 2559 fps | 95.9% |
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 94 powders for .338 Win Mag. loaded with the .338 | 185gr | Fox Classic Hunter. ReloadSwiss RS 60 delivers the highest muzzle velocity at 3,058 fps; across all powders the maximum-charge window runs from 1,745 fps to 3,058 fps. Accurate 4350 gives the best case fill at 100 %, and 94 of the 94 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (430 MPa), the top charges use 55–90 %, leaving at least 10 % headroom. The 185.0 gr projectile in 0.338" calls for a 1:13.5 twist; slower twists will usually not stabilise this weight. Accurate 4350, Alliant Reloder-16, Alliant Reloder-17 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 Power Pro 2000-MR, ReloadSwiss RS 52, Hodgdon LEVERevolution rank at the top here: for .338 Win Mag. with the .338 | 185gr | Fox Classic Hunter 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.