Load Specifications
Load data in caliber .338 Win Mag. with .338 | 210gr | Rhino Solid Shank bullet and 97 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, Hodgdon Superformance 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: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 84% | 54,766 psi | 88% | 2648 fps | 100% |
| Accurate 2495 | <<locked>> | 88% | 53,113 psi | 85% | 2667 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 53,287 psi | 85% | 2720 fps | 100% |
| Accurate 2700 | <<locked>> | 92% | 53,548 psi | 86% | 2671 fps | 96.6% |
| Accurate 4064 | <<locked>> | 90% | 53,171 psi | 85% | 2713 fps | 100% |
| Accurate 4350 | <<locked>> | 98% | 52,736 psi | 85% | 2792 fps | 99.4% |
| ADI AR 2206H | <<locked>> | 86% | 53,766 psi | 86% | 2743 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 92% | 54,636 psi | 88% | 2743 fps | 99.8% |
| ADI Benchmark 8208 | <<locked>> | 86% | 56,217 psi | 90% | 2746 fps | 100% |
| Alliant AR-Comp | <<locked>> | 84% | 53,432 psi | 86% | 2674 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 88% | 53,200 psi | 85% | 2854 fps | 99.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 54,723 psi | 88% | 2766 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 90% | 55,187 psi | 88% | 2785 fps | 99.9% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 54,172 psi | 87% | 2848 fps | 99.8% |
| Alliant Reloder-17 | <<locked>> | 96% | 55,347 psi | 89% | 2884 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 38,711 psi | 62% | 2589 fps | 98.6% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 42,989 psi | 69% | 2736 fps | 97.7% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 53,374 psi | 86% | 2756 fps | 99.5% |
| Bofors RP3 | <<locked>> | 92% | 55,143 psi | 88% | 2779 fps | 100% |
| Bofors RP7 | <<locked>> | 96% | 55,347 psi | 89% | 2749 fps | 97.3% |
| Hodgdon Benchmark | <<locked>> | 84% | 54,650 psi | 88% | 2680 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 86% | 55,622 psi | 89% | 2776 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 82% | 53,838 psi | 86% | 2818 fps | 99.8% |
| Hodgdon H322 | <<locked>> | 84% | 56,115 psi | 90% | 2726 fps | 100% |
| Hodgdon H380 | <<locked>> | 92% | 56,391 psi | 90% | 2795 fps | 99.4% |
| Hodgdon H414 | <<locked>> | 94% | 53,635 psi | 86% | 2808 fps | 97.7% |
| Hodgdon H4350 | <<locked>> | 98% | 54,476 psi | 87% | 2772 fps | 96.4% |
| Hodgdon H4895 | <<locked>> | 86% | 54,331 psi | 87% | 2753 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 50,314 psi | 81% | 2726 fps | 99.9% |
| Hodgdon LEVERevolution | <<locked>> | 88% | 53,592 psi | 86% | 2785 fps | 100% |
| Hodgdon Superformance | <<locked>> | 98% | 56,420 psi | 90% | 2877 fps | 97.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,491 psi | 57% | 1670 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 54,244 psi | 87% | 2736 fps | 100% |
| IMR 3031 | <<locked>> | 90% | 56,188 psi | 90% | 2762 fps | 100% |
| IMR 4064 | <<locked>> | 92% | 53,374 psi | 86% | 2713 fps | 99.8% |
| IMR 4166 Enduron | <<locked>> | 94% | 56,173 psi | 90% | 2736 fps | 97.9% |
| IMR 4350ᴾ | <<locked>> | 100% | 55,448 psi | 89% | 2772 fps | 97.3% |
| IMR 4451 Enduron | <<locked>> | 94% | 53,998 psi | 87% | 2733 fps | 97.5% |
| IMR 4831ᴾ | <<locked>> | 100% | 47,384 psi | 76% | 2690 fps | 98.8% |
| IMR 4895 | <<locked>> | 88% | 53,214 psi | 85% | 2766 fps | 99.9% |
| IMR 8208 XBR | <<locked>> | 86% | 56,217 psi | 90% | 2746 fps | 100% |
| Lovex D073.6 | <<locked>> | 86% | 53,287 psi | 85% | 2720 fps | 100% |
| Lovex S060 | <<locked>> | 86% | 53,359 psi | 86% | 2674 fps | 99.9% |
| Lovex S062 | <<locked>> | 90% | 54,070 psi | 87% | 2726 fps | 100% |
| Lovex S065 | <<locked>> | 96% | 53,200 psi | 85% | 2723 fps | 98.6% |
| Lovex S070 | <<locked>> | 98% | 53,925 psi | 86% | 2756 fps | 97.8% |
| Norma 201 | <<locked>> | 88% | 55,782 psi | 89% | 2736 fps | 100% |
| Norma 202 | <<locked>> | 86% | 53,084 psi | 85% | 2694 fps | 100% |
| Norma 203B | <<locked>> | 90% | 54,433 psi | 87% | 2772 fps | 99.9% |
| Norma 204ᴾ | <<locked>> | 100% | 56,188 psi | 90% | 2822 fps | 96.2% |
| Norma URPᴾ | <<locked>> | 100% | 55,216 psi | 89% | 2828 fps | 99.6% |
| Ramshot Big Game | <<locked>> | 90% | 55,027 psi | 88% | 2799 fps | 99.9% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 54,070 psi | 87% | 2825 fps | 98.5% |
| Ramshot TAC | <<locked>> | 84% | 52,924 psi | 85% | 2710 fps | 98.7% |
| Ramshot Wild Boar | <<locked>> | 86% | 56,202 psi | 90% | 2782 fps | 100% |
| Ramshot X-Terminator | <<locked>> | 82% | 53,635 psi | 86% | 2697 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,042 psi | 58% | 1713 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 55,666 psi | 89% | 2726 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 53,055 psi | 85% | 2723 fps | 98% |
| ReloadSwiss RS 52 | <<locked>> | 88% | 55,593 psi | 89% | 2848 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 55,056 psi | 88% | 2881 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 56,028 psi | 90% | 2864 fps | 99.6% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 55,724 psi | 89% | 2894 fps | 99.4% |
| Rottweil R 901 | <<locked>> | 84% | 53,635 psi | 86% | 2674 fps | 100% |
| Rottweil R 902 | <<locked>> | 90% | 56,333 psi | 90% | 2736 fps | 100% |
| Rottweil R 903 | <<locked>> | 94% | 54,940 psi | 88% | 2769 fps | 100% |
| Rottweil R 907 | <<locked>> | 96% | 55,347 psi | 89% | 2749 fps | 97.3% |
| Shooters World Long Rifle | <<locked>> | 96% | 53,200 psi | 85% | 2723 fps | 98.6% |
| Shooters World Match Rifle | <<locked>> | 86% | 53,287 psi | 85% | 2720 fps | 100% |
| Shooters World Precision | <<locked>> | 90% | 54,070 psi | 87% | 2726 fps | 100% |
| Shooters World SW4350 | <<locked>> | 98% | 53,925 psi | 86% | 2756 fps | 97.8% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 53,330 psi | 86% | 2782 fps | 99.9% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 54,882 psi | 88% | 2743 fps | 99.2% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 55,492 psi | 89% | 2762 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 54,201 psi | 87% | 2635 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 54,215 psi | 87% | 2631 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 53,417 psi | 86% | 2677 fps | 97.4% |
| Somchem S321 | <<locked>> | 82% | 53,911 psi | 86% | 2726 fps | 100% |
| Somchem S335 | <<locked>> | 86% | 53,577 psi | 86% | 2635 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 54,433 psi | 87% | 2733 fps | 99.9% |
| Somchem S355 | <<locked>> | 94% | 55,376 psi | 89% | 2769 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 49,661 psi | 80% | 2782 fps | 100% |
| Unknown powder | <<locked>> | 96% | 53,040 psi | 85% | 2785 fps | 99% |
| Vihtavuori N130 | <<locked>> | 84% | 56,101 psi | 90% | 2628 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 53,737 psi | 86% | 2615 fps | 100% |
| Vihtavuori N135 | <<locked>> | 90% | 55,927 psi | 90% | 2700 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 56,173 psi | 90% | 2710 fps | 100% |
| Vihtavuori N150 | <<locked>> | 98% | 53,345 psi | 86% | 2703 fps | 100% |
| Vihtavuori N160 | <<locked>> | 96% | 53,577 psi | 86% | 2759 fps | 99.4% |
| Vihtavuori N530 | <<locked>> | 84% | 55,927 psi | 90% | 2749 fps | 100% |
| Vihtavuori N540 | <<locked>> | 90% | 55,782 psi | 89% | 2736 fps | 100% |
| Vihtavuori N550 | <<locked>> | 96% | 53,882 psi | 86% | 2805 fps | 99.4% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 42,105 psi | 68% | 2661 fps | 98.4% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 54,810 psi | 88% | 2759 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 53,606 psi | 86% | 2749 fps | 100% |
| Winchester 760 | <<locked>> | 94% | 53,635 psi | 86% | 2808 fps | 97.7% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 34,534 psi | 55% | 2582 fps | 98.2% |
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% | 48,457 psi | 78% | 2559 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 41,075 psi | 66% | 2487 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 46,441 psi | 74% | 2618 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 46,978 psi | 75% | 2566 fps | 95.1% |
| Accurate 4064 | <<locked>> | 80% | 38,856 psi | 62% | 2480 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 34,838 psi | 56% | 2464 fps | 95.7% |
| ADI AR 2206H | <<locked>> | 80% | 44,454 psi | 71% | 2589 fps | 99.1% |
| ADI AR 2208 | <<locked>> | 80% | 37,942 psi | 61% | 2444 fps | 97.2% |
| ADI Benchmark 8208 | <<locked>> | 80% | 46,514 psi | 75% | 2598 fps | 99.9% |
| Alliant AR-Comp | <<locked>> | 80% | 46,949 psi | 75% | 2585 fps | 100% |
| Alliant Power Pro 2000-MR | 60.4 gr | 80% | 40,350 psi | 65% | 2615 fps | 97.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 37,463 psi | 60% | 2467 fps | 98.5% |
| Alliant Reloder-15 | <<locked>> | 80% | 40,205 psi | 64% | 2526 fps | 98% |
| Alliant Reloder-16 | <<locked>> | 86% | 35,143 psi | 56% | 2474 fps | 95.8% |
| Alliant Reloder-17 | <<locked>> | 80% | 32,329 psi | 52% | 2431 fps | 96.5% |
| Alliant Reloder-23 | <<locked>> | 92% | 30,240 psi | 48% | 2375 fps | 95.4% |
| Alliant Reloder-26 | <<locked>> | 96% | 37,434 psi | 60% | 2615 fps | 95.8% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 43,598 psi | 70% | 2592 fps | 98.2% |
| Bofors RP3 | <<locked>> | 80% | 37,014 psi | 59% | 2467 fps | 98.5% |
| Bofors RP7 | <<locked>> | 90% | 45,919 psi | 74% | 2592 fps | 95.2% |
| Hodgdon Benchmark | <<locked>> | 80% | 48,414 psi | 78% | 2589 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 45,368 psi | 73% | 2618 fps | 99.9% |
| Hodgdon CFE223 | <<locked>> | 80% | 50,024 psi | 80% | 2759 fps | 99.5% |
| Hodgdon H322 | <<locked>> | 80% | 49,559 psi | 79% | 2635 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 38,014 psi | 61% | 2474 fps | 96.1% |
| Hodgdon H414 | <<locked>> | 88% | 43,729 psi | 70% | 2641 fps | 95.4% |
| Hodgdon H4350 | <<locked>> | 96% | 51,184 psi | 82% | 2723 fps | 95.7% |
| Hodgdon H4895 | <<locked>> | 80% | 44,904 psi | 72% | 2598 fps | 99.5% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 30,240 psi | 48% | 2323 fps | 95.7% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 40,973 psi | 66% | 2575 fps | 99.3% |
| Hodgdon Superformance | 72.3 gr | 92% | 45,614 psi | 73% | 2694 fps | 95.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,397 psi | 42% | 1493 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 40,016 psi | 64% | 2493 fps | 98.7% |
| IMR 3031 | <<locked>> | 80% | 40,857 psi | 66% | 2530 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 37,202 psi | 60% | 2425 fps | 97.3% |
| IMR 4166 Enduron | <<locked>> | 86% | 44,367 psi | 71% | 2536 fps | 95.4% |
| IMR 4350 | <<locked>> | 94% | 46,079 psi | 74% | 2621 fps | 95.3% |
| IMR 4451 Enduron | <<locked>> | 88% | 45,034 psi | 72% | 2579 fps | 95.5% |
| IMR 4831 | <<locked>> | 90% | 34,563 psi | 55% | 2441 fps | 95.7% |
| IMR 4895 | <<locked>> | 80% | 41,191 psi | 66% | 2556 fps | 98.7% |
| IMR 8208 XBR | <<locked>> | 80% | 46,514 psi | 75% | 2598 fps | 99.9% |
| Lovex D073.6 | <<locked>> | 80% | 43,743 psi | 70% | 2572 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 44,599 psi | 72% | 2530 fps | 99.1% |
| Lovex S062 | <<locked>> | 80% | 39,711 psi | 64% | 2484 fps | 99.2% |
| Lovex S065 | <<locked>> | 86% | 39,320 psi | 63% | 2477 fps | 95.5% |
| Lovex S070 | <<locked>> | 90% | 42,105 psi | 68% | 2549 fps | 95.1% |
| Norma 201 | <<locked>> | 80% | 43,642 psi | 70% | 2546 fps | 99.7% |
| Norma 202 | <<locked>> | 80% | 43,932 psi | 70% | 2552 fps | 100% |
| Norma 203B | <<locked>> | 80% | 39,595 psi | 63% | 2516 fps | 98.3% |
| Norma 204 | <<locked>> | 98% | 52,692 psi | 84% | 2766 fps | 95.4% |
| Norma URP | <<locked>> | 86% | 35,143 psi | 56% | 2464 fps | 95.6% |
| Ramshot Big Game | <<locked>> | 80% | 39,059 psi | 63% | 2526 fps | 98% |
| Ramshot Hunter | <<locked>> | 92% | 41,800 psi | 67% | 2608 fps | 95.8% |
| Ramshot TAC | <<locked>> | 80% | 46,514 psi | 75% | 2605 fps | 97.6% |
| Ramshot Wild Boar | <<locked>> | 80% | 45,977 psi | 74% | 2621 fps | 99.3% |
| Ramshot X-Terminator | <<locked>> | 80% | 50,125 psi | 80% | 2644 fps | 99.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,789 psi | 43% | 1529 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 52,098 psi | 84% | 2674 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 40,988 psi | 66% | 2510 fps | 95.2% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 42,351 psi | 68% | 2628 fps | 98.4% |
| ReloadSwiss RS 60 | 59.5 gr | 80% | 34,403 psi | 55% | 2497 fps | 99.3% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 34,592 psi | 55% | 2477 fps | 95.1% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 37,260 psi | 60% | 2539 fps | 95.1% |
| Rottweil R 901 | <<locked>> | 80% | 47,659 psi | 76% | 2585 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 41,568 psi | 67% | 2500 fps | 99.4% |
| Rottweil R 903 | <<locked>> | 80% | 34,896 psi | 56% | 2415 fps | 97.8% |
| Rottweil R 907 | <<locked>> | 90% | 45,919 psi | 74% | 2592 fps | 95.2% |
| Shooters World Long Rifle | <<locked>> | 86% | 39,320 psi | 63% | 2477 fps | 95.5% |
| Shooters World Match Rifle | <<locked>> | 80% | 43,743 psi | 70% | 2572 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 39,711 psi | 64% | 2484 fps | 99.2% |
| Shooters World SW4350 | <<locked>> | 90% | 42,105 psi | 68% | 2549 fps | 95.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 35,868 psi | 58% | 2464 fps | 97.2% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 44,875 psi | 72% | 2582 fps | 97.7% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 43,033 psi | 69% | 2562 fps | 98.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 44,889 psi | 72% | 2497 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 37,347 psi | 60% | 2369 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 44,077 psi | 71% | 2526 fps | 95.4% |
| Somchem S321 | <<locked>> | 80% | 50,270 psi | 81% | 2674 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 44,628 psi | 72% | 2500 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 44,367 psi | 71% | 2575 fps | 99% |
| Somchem S355 | <<locked>> | 80% | 35,795 psi | 57% | 2421 fps | 97.8% |
| Somchem S365 | <<locked>> | 80% | 25,947 psi | 42% | 2254 fps | 95.1% |
| Unknown powder | <<locked>> | 84% | 35,926 psi | 58% | 2467 fps | 95.1% |
| Vihtavuori N130 | <<locked>> | 80% | 49,748 psi | 80% | 2543 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 42,380 psi | 68% | 2448 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 40,944 psi | 66% | 2480 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 41,031 psi | 66% | 2480 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 30,516 psi | 49% | 2280 fps | 97.5% |
| Vihtavuori N160 | <<locked>> | 84% | 35,911 psi | 58% | 2444 fps | 95.8% |
| Vihtavuori N530 | <<locked>> | 80% | 48,994 psi | 79% | 2648 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 40,582 psi | 65% | 2500 fps | 100% |
| Vihtavuori N550 | <<locked>> | 84% | 36,419 psi | 58% | 2487 fps | 95.8% |
| Vihtavuori N555 | <<locked>> | 92% | 32,532 psi | 52% | 2454 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 30,110 psi | 48% | 2287 fps | 95.8% |
| Winchester 748 | <<locked>> | 80% | 49,864 psi | 80% | 2697 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 43,729 psi | 70% | 2641 fps | 95.4% |
| Winchester StaBALL HD | <<locked>> | 96% | 30,429 psi | 49% | 2454 fps | 96% |
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 97 powders for .338 Win Mag. loaded with the .338 | 210gr | Rhino Solid Shank. ReloadSwiss RS 70 delivers the highest muzzle velocity at 2,894 fps; across all powders the maximum-charge window runs from 1,670 fps to 2,894 fps. Alliant Reloder-16 gives the best case fill at 100 %, and 97 of the 97 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 210.0 gr projectile in 0.338" calls for a 1:17.0 twist; slower twists will usually not stabilise this weight. Alliant Reloder-16, Alliant Reloder-23, Alliant Reloder-26 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, Hodgdon Superformance, ReloadSwiss RS 60 rank at the top here: for .338 Win Mag. with the .338 | 210gr | Rhino Solid Shank 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.