Load Specifications
Bullet Manufacturer:Swift
Bullet Weight:210 gr
Bullet Diameter:0.338"
Bullet Length:<<locked>>
Caliber:.338 Win Mag. load data
Case Length (l3):2.5"
Cartridge Length (C.O.L.):<<locked>>
Case Capacity:86 Grains of Water
Primer Size:Large Rifle (LR)
Barrel Length:24"
Max. allowed Pressure:62,366 psi
Recommended Twist Rate:1:13.5
Load data in caliber .338 Win Mag. with .338 | 210gr | Swift Scirocco bullet and 102 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 60 and Alliant Reloder-17.
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>> | 86% | 55,143 psi | 88% | 2631 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 53,519 psi | 86% | 2657 fps | 100% |
| Accurate 2495 | <<locked>> | 90% | 53,272 psi | 85% | 2654 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 55,245 psi | 89% | 2717 fps | 100% |
| Accurate 2700 | <<locked>> | 90% | 53,011 psi | 85% | 2644 fps | 96% |
| Accurate 4064 | <<locked>> | 92% | 53,156 psi | 85% | 2697 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 52,417 psi | 84% | 2766 fps | 99.2% |
| ADI AR 2206H | <<locked>> | 88% | 53,998 psi | 87% | 2723 fps | 99.8% |
| ADI AR 2208 | <<locked>> | 94% | 55,056 psi | 88% | 2723 fps | 99.6% |
| ADI Benchmark 8208 | <<locked>> | 86% | 53,287 psi | 85% | 2680 fps | 100% |
| Alliant AR-Comp | <<locked>> | 86% | 53,577 psi | 86% | 2661 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 54,911 psi | 88% | 2782 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 90% | 53,476 psi | 86% | 2835 fps | 99.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 54,665 psi | 88% | 2743 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 82% | 54,766 psi | 88% | 2635 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 92% | 55,405 psi | 89% | 2766 fps | 99.7% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 50,749 psi | 81% | 2766 fps | 99.2% |
| Alliant Reloder-17 | <<locked>> | 98% | 55,216 psi | 89% | 2858 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 36,071 psi | 58% | 2507 fps | 97.4% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 39,929 psi | 64% | 2648 fps | 96.1% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 53,722 psi | 86% | 2740 fps | 99.4% |
| Bofors RP3 | <<locked>> | 94% | 55,172 psi | 88% | 2759 fps | 100% |
| Bofors RP7 | <<locked>> | 98% | 55,593 psi | 89% | 2723 fps | 96.8% |
| Hodgdon Benchmark | <<locked>> | 86% | 55,143 psi | 88% | 2664 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 88% | 55,970 psi | 90% | 2759 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 84% | 54,012 psi | 87% | 2799 fps | 99.7% |
| Hodgdon H322 | <<locked>> | 82% | 53,954 psi | 87% | 2677 fps | 100% |
| Hodgdon H335 | <<locked>> | 82% | 54,940 psi | 88% | 2703 fps | 100% |
| Hodgdon H380 | <<locked>> | 92% | 53,055 psi | 85% | 2723 fps | 98.9% |
| Hodgdon H414ᴾ | <<locked>> | 100% | 55,506 psi | 89% | 2812 fps | 97.6% |
| Hodgdon H4895 | <<locked>> | 88% | 54,563 psi | 87% | 2736 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 46,992 psi | 75% | 2651 fps | 99.5% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 53,751 psi | 86% | 2769 fps | 100% |
| Hodgdon Superformance | <<locked>> | 98% | 53,011 psi | 85% | 2795 fps | 96.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,128 psi | 56% | 1640 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 56,014 psi | 90% | 2740 fps | 100% |
| IMR 3031 | <<locked>> | 88% | 54,462 psi | 87% | 2723 fps | 100% |
| IMR 4064 | <<locked>> | 92% | 54,578 psi | 88% | 2707 fps | 99.7% |
| IMR 4166 Enduron | <<locked>> | 90% | 54,984 psi | 88% | 2690 fps | 97.3% |
| IMR 4198 | <<locked>> | 82% | 55,042 psi | 88% | 2595 fps | 100% |
| IMR 4350ᴾ | <<locked>> | 100% | 52,243 psi | 84% | 2697 fps | 96.2% |
| IMR 4451 Enduron | <<locked>> | 96% | 54,186 psi | 87% | 2707 fps | 97.1% |
| IMR 4831ᴾ | <<locked>> | 100% | 49,530 psi | 79% | 2707 fps | 98.9% |
| IMR 4895 | <<locked>> | 90% | 53,447 psi | 86% | 2746 fps | 99.8% |
| IMR 8208 XBR | <<locked>> | 86% | 53,287 psi | 85% | 2680 fps | 100% |
| Lovex D073.5 | <<locked>> | 82% | 53,258 psi | 85% | 2664 fps | 100% |
| Lovex D073.6 | <<locked>> | 88% | 53,476 psi | 86% | 2703 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 53,925 psi | 86% | 2657 fps | 99.8% |
| Lovex S062 | <<locked>> | 92% | 54,114 psi | 87% | 2703 fps | 100% |
| Lovex S065 | <<locked>> | 98% | 53,316 psi | 85% | 2700 fps | 98.2% |
| Lovex S070ᴾ | <<locked>> | 100% | 53,969 psi | 87% | 2730 fps | 97.4% |
| Norma 201 | <<locked>> | 90% | 56,362 psi | 90% | 2723 fps | 100% |
| Norma 202 | <<locked>> | 88% | 53,432 psi | 86% | 2677 fps | 100% |
| Norma 203B | <<locked>> | 92% | 54,563 psi | 87% | 2753 fps | 99.9% |
| Norma URPᴾ | <<locked>> | 100% | 51,488 psi | 83% | 2753 fps | 99% |
| Ramshot Big Game | <<locked>> | 92% | 55,013 psi | 88% | 2779 fps | 99.8% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 50,763 psi | 81% | 2749 fps | 97.5% |
| Ramshot TAC | <<locked>> | 86% | 53,577 psi | 86% | 2697 fps | 98.4% |
| Ramshot Wild Boar | <<locked>> | 86% | 52,866 psi | 85% | 2713 fps | 99.7% |
| Ramshot X-Terminator | <<locked>> | 84% | 54,404 psi | 87% | 2684 fps | 99.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,694 psi | 57% | 1683 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 56,391 psi | 90% | 2713 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 53,417 psi | 86% | 2703 fps | 97.6% |
| ReloadSwiss RS 52 | <<locked>> | 90% | 55,666 psi | 89% | 2828 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 96% | 55,071 psi | 88% | 2861 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 51,982 psi | 83% | 2785 fps | 99% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 52,170 psi | 84% | 2808 fps | 98.6% |
| Rottweil R 901 | <<locked>> | 86% | 53,983 psi | 87% | 2657 fps | 100% |
| Rottweil R 902 | <<locked>> | 90% | 53,359 psi | 86% | 2674 fps | 100% |
| Rottweil R 903 | <<locked>> | 96% | 55,027 psi | 88% | 2749 fps | 100% |
| Rottweil R 907 | <<locked>> | 98% | 55,593 psi | 89% | 2723 fps | 96.8% |
| Shooters World Long Rifle | <<locked>> | 98% | 53,316 psi | 85% | 2700 fps | 98.2% |
| Shooters World Match Rifle | <<locked>> | 88% | 53,476 psi | 86% | 2703 fps | 100% |
| Shooters World Precision | <<locked>> | 92% | 54,114 psi | 87% | 2703 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 53,969 psi | 87% | 2730 fps | 97.4% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 55,970 psi | 90% | 2684 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 94% | 53,243 psi | 85% | 2759 fps | 99.8% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 55,883 psi | 90% | 2657 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 88% | 55,390 psi | 89% | 2726 fps | 99% |
| SNPE Vectan SP 9 | <<locked>> | 90% | 55,840 psi | 90% | 2746 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 54,636 psi | 88% | 2618 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 54,505 psi | 87% | 2615 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 53,896 psi | 86% | 2657 fps | 97% |
| Somchem S321 | <<locked>> | 84% | 54,331 psi | 87% | 2713 fps | 100% |
| Somchem S335 | <<locked>> | 88% | 54,056 psi | 87% | 2621 fps | 100% |
| Somchem S341 | <<locked>> | 88% | 54,839 psi | 88% | 2717 fps | 99.8% |
| Somchem S355 | <<locked>> | 96% | 55,463 psi | 89% | 2749 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 46,093 psi | 74% | 2703 fps | 100% |
| Vihtavuori N130 | <<locked>> | 84% | 54,505 psi | 87% | 2585 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 54,752 psi | 88% | 2605 fps | 100% |
| Vihtavuori N135 | <<locked>> | 92% | 56,246 psi | 90% | 2684 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 53,766 psi | 86% | 2657 fps | 100% |
| Vihtavuori N150 | <<locked>> | 96% | 53,490 psi | 86% | 2680 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 54,360 psi | 87% | 2753 fps | 99.2% |
| Vihtavuori N530 | <<locked>> | 86% | 53,664 psi | 86% | 2680 fps | 100% |
| Vihtavuori N540 | <<locked>> | 92% | 55,550 psi | 89% | 2703 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 53,214 psi | 85% | 2756 fps | 99% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 38,943 psi | 62% | 2582 fps | 97.4% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 55,129 psi | 88% | 2736 fps | 100% |
| Winchester 748 | <<locked>> | 86% | 53,345 psi | 86% | 2726 fps | 100% |
| Winchester 760ᴾ | <<locked>> | 100% | 55,782 psi | 89% | 2818 fps | 97.6% |
| Winchester StaBALL Match | <<locked>> | 90% | 55,941 psi | 90% | 2759 fps | 100% |
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% | 45,934 psi | 74% | 2503 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 50,096 psi | 80% | 2608 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 38,377 psi | 62% | 2428 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 45,121 psi | 72% | 2569 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 49,647 psi | 80% | 2592 fps | 95.3% |
| Accurate 4064 | <<locked>> | 80% | 36,289 psi | 58% | 2418 fps | 99.8% |
| Accurate 4350 | <<locked>> | 88% | 34,461 psi | 55% | 2438 fps | 95.1% |
| ADI AR 2206H | <<locked>> | 80% | 42,148 psi | 68% | 2523 fps | 98.5% |
| ADI AR 2208 | <<locked>> | 80% | 35,853 psi | 57% | 2379 fps | 96.1% |
| ADI Benchmark 8208 | <<locked>> | 80% | 44,222 psi | 71% | 2536 fps | 99.5% |
| Alliant AR-Comp | <<locked>> | 80% | 44,150 psi | 71% | 2530 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 51,547 psi | 83% | 2730 fps | 99.9% |
| Alliant Power Pro 2000-MR | 57 gr | 80% | 38,116 psi | 61% | 2543 fps | 96.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 35,259 psi | 57% | 2402 fps | 97.7% |
| Alliant Reloder-10x | <<locked>> | 80% | 51,634 psi | 83% | 2592 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 37,971 psi | 61% | 2461 fps | 97% |
| Alliant Reloder-16 | <<locked>> | 88% | 35,201 psi | 56% | 2454 fps | 95.2% |
| Alliant Reloder-17 | 56.1 gr | 80% | 30,400 psi | 49% | 2356 fps | 95% |
| Alliant Reloder-23 | <<locked>> | 96% | 31,995 psi | 51% | 2402 fps | 95.7% |
| Alliant Reloder-26 | <<locked>> | 98% | 37,159 psi | 60% | 2579 fps | 95% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 41,249 psi | 66% | 2526 fps | 97.3% |
| Bofors RP3 | <<locked>> | 80% | 34,766 psi | 56% | 2405 fps | 97.7% |
| Bofors RP7 | <<locked>> | 94% | 49,211 psi | 79% | 2625 fps | 95.5% |
| Hodgdon Benchmark | <<locked>> | 80% | 46,108 psi | 74% | 2526 fps | 99.9% |
| Hodgdon BL-C2 | <<locked>> | 80% | 42,743 psi | 69% | 2552 fps | 99.7% |
| Hodgdon CFE223 | <<locked>> | 80% | 46,934 psi | 75% | 2687 fps | 98.9% |
| Hodgdon H322 | <<locked>> | 80% | 50,415 psi | 81% | 2628 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 51,416 psi | 82% | 2654 fps | 100% |
| Hodgdon H380 | <<locked>> | 82% | 38,101 psi | 61% | 2454 fps | 95.7% |
| Hodgdon H414 | <<locked>> | 94% | 45,585 psi | 73% | 2651 fps | 95.4% |
| Hodgdon H4895 | <<locked>> | 80% | 42,511 psi | 68% | 2536 fps | 98.9% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 30,211 psi | 48% | 2303 fps | 95.2% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 38,406 psi | 62% | 2507 fps | 98.6% |
| Hodgdon Superformance | <<locked>> | 96% | 49,284 psi | 79% | 2733 fps | 95.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,136 psi | 42% | 1467 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 40,814 psi | 65% | 2490 fps | 98.6% |
| IMR 3031 | <<locked>> | 80% | 41,901 psi | 67% | 2533 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 37,594 psi | 60% | 2411 fps | 97% |
| IMR 4166 Enduron | <<locked>> | 84% | 45,484 psi | 73% | 2533 fps | 95.2% |
| IMR 4198 | <<locked>> | 80% | 51,909 psi | 83% | 2552 fps | 100% |
| IMR 4350 | <<locked>> | 98% | 49,110 psi | 79% | 2648 fps | 95.5% |
| IMR 4451 Enduron | <<locked>> | 90% | 45,310 psi | 73% | 2559 fps | 95% |
| IMR 4831 | <<locked>> | 90% | 35,839 psi | 57% | 2451 fps | 95.7% |
| IMR 4895 | <<locked>> | 80% | 38,856 psi | 62% | 2490 fps | 97.9% |
| IMR 8208 XBR | <<locked>> | 80% | 44,222 psi | 71% | 2536 fps | 99.5% |
| Lovex D073.5 | <<locked>> | 80% | 49,893 psi | 80% | 2618 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 40,915 psi | 66% | 2507 fps | 99.9% |
| Lovex S060 | <<locked>> | 80% | 42,395 psi | 68% | 2467 fps | 98.5% |
| Lovex S062 | <<locked>> | 80% | 37,405 psi | 60% | 2418 fps | 98.6% |
| Lovex S065 | <<locked>> | 88% | 39,436 psi | 63% | 2457 fps | 95.1% |
| Lovex S070 | <<locked>> | 94% | 44,904 psi | 72% | 2582 fps | 95.4% |
| Norma 201 | <<locked>> | 80% | 41,263 psi | 66% | 2480 fps | 99.2% |
| Norma 202 | <<locked>> | 80% | 41,452 psi | 66% | 2490 fps | 100% |
| Norma 203B | <<locked>> | 80% | 37,333 psi | 60% | 2448 fps | 97.4% |
| Norma URP | <<locked>> | 88% | 35,070 psi | 56% | 2441 fps | 95.1% |
| Ramshot Big Game | <<locked>> | 80% | 36,753 psi | 59% | 2461 fps | 97% |
| Ramshot Hunter | <<locked>> | 94% | 41,698 psi | 67% | 2585 fps | 95.2% |
| Ramshot TAC | <<locked>> | 80% | 44,121 psi | 71% | 2536 fps | 96.6% |
| Ramshot Wild Boar | <<locked>> | 80% | 43,482 psi | 70% | 2556 fps | 98.7% |
| Ramshot X-Terminator | <<locked>> | 80% | 47,703 psi | 76% | 2582 fps | 99.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,542 psi | 43% | 1503 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 49,443 psi | 79% | 2612 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 43,976 psi | 71% | 2546 fps | 95.6% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 39,363 psi | 63% | 2552 fps | 97.4% |
| ReloadSwiss RS 60 | 56.1 gr | 80% | 32,343 psi | 52% | 2425 fps | 98.5% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 36,912 psi | 59% | 2510 fps | 95.5% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 39,842 psi | 64% | 2572 fps | 95.5% |
| Rottweil R 901 | <<locked>> | 80% | 45,208 psi | 72% | 2523 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 39,421 psi | 63% | 2438 fps | 98.9% |
| Rottweil R 903 | <<locked>> | 80% | 32,663 psi | 52% | 2349 fps | 96.7% |
| Rottweil R 907 | <<locked>> | 94% | 49,211 psi | 79% | 2625 fps | 95.5% |
| Shooters World Long Rifle | <<locked>> | 88% | 39,436 psi | 63% | 2457 fps | 95.1% |
| Shooters World Match Rifle | <<locked>> | 80% | 40,915 psi | 66% | 2507 fps | 99.9% |
| Shooters World Precision | <<locked>> | 80% | 37,405 psi | 60% | 2418 fps | 98.6% |
| Shooters World SW4350 | <<locked>> | 94% | 44,904 psi | 72% | 2582 fps | 95.4% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 52,388 psi | 84% | 2635 fps | 99.9% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 33,620 psi | 54% | 2392 fps | 96% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 52,460 psi | 84% | 2612 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 42,250 psi | 68% | 2510 fps | 96.7% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 40,582 psi | 65% | 2493 fps | 98.1% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 42,844 psi | 69% | 2441 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 35,462 psi | 57% | 2316 fps | 99.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 47,181 psi | 76% | 2552 fps | 95.7% |
| Somchem S321 | <<locked>> | 80% | 47,688 psi | 76% | 2612 fps | 99.9% |
| Somchem S335 | <<locked>> | 80% | 42,308 psi | 68% | 2444 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 42,018 psi | 67% | 2510 fps | 98.4% |
| Somchem S355 | <<locked>> | 80% | 33,620 psi | 54% | 2356 fps | 96.8% |
| Somchem S365 | <<locked>> | 84% | 27,688 psi | 44% | 2290 fps | 95.6% |
| Vihtavuori N130 | <<locked>> | 80% | 48,414 psi | 78% | 2503 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 43,076 psi | 69% | 2438 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 38,609 psi | 62% | 2425 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 39,233 psi | 63% | 2428 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 31,952 psi | 51% | 2297 fps | 97.6% |
| Vihtavuori N160 | <<locked>> | 88% | 36,666 psi | 59% | 2444 fps | 95.6% |
| Vihtavuori N530 | <<locked>> | 80% | 44,237 psi | 71% | 2530 fps | 99.6% |
| Vihtavuori N540 | <<locked>> | 80% | 37,869 psi | 61% | 2421 fps | 99.8% |
| Vihtavuori N550 | <<locked>> | 88% | 36,027 psi | 58% | 2444 fps | 95.1% |
| Vihtavuori N555 | <<locked>> | 96% | 34,069 psi | 55% | 2474 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 30,400 psi | 49% | 2270 fps | 95.3% |
| Winchester 748 | <<locked>> | 80% | 43,569 psi | 70% | 2572 fps | 99.8% |
| Winchester 760 | <<locked>> | 94% | 45,803 psi | 73% | 2654 fps | 95.5% |
| Winchester StaBALL Match | <<locked>> | 80% | 39,943 psi | 64% | 2497 fps | 98.5% |
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 102 powders for .338 Win Mag. loaded with the .338 | 210gr | Swift Scirocco. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,861 fps; across all powders the maximum-charge window runs from 1,640 fps to 2,861 fps. Accurate 4350 gives the best case fill at 100 %, and 102 of the 102 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (430 MPa), the top charges use 56–90 %, leaving at least 10 % headroom. The 210.0 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-23 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 60, Alliant Reloder-17 rank at the top here: for .338 Win Mag. with the .338 | 210gr | Swift Scirocco 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.