Load Specifications
Load data in caliber .338 Win Mag. with .338 | 250gr | Alaska Bullet Works Kodiak PP SPBC bullet and 105 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.
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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 2495 | <<locked>> | 86% | 55,883 psi | 90% | 2457 fps | 100% |
| Accurate 2520 | <<locked>> | 82% | 55,637 psi | 89% | 2507 fps | 100% |
| Accurate 2700 | <<locked>> | 90% | 55,317 psi | 89% | 2480 fps | 98.5% |
| Accurate 3100ᴾ | <<locked>> | 100% | 46,122 psi | 74% | 2448 fps | 98.6% |
| Accurate 4064 | <<locked>> | 88% | 55,883 psi | 90% | 2503 fps | 100% |
| Accurate 4350 | <<locked>> | 96% | 55,927 psi | 90% | 2598 fps | 100% |
| ADI AR 2206H | <<locked>> | 84% | 55,666 psi | 89% | 2533 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 53,185 psi | 85% | 2490 fps | 100% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 53,809 psi | 86% | 2585 fps | 97.7% |
| ADI Benchmark 8208 | <<locked>> | 82% | 54,433 psi | 87% | 2480 fps | 100% |
| Alliant AR-Comp | <<locked>> | 82% | 55,941 psi | 90% | 2451 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 55,492 psi | 89% | 2648 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 53,519 psi | 86% | 2510 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 53,867 psi | 86% | 2526 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 96% | 53,374 psi | 86% | 2602 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 92% | 54,259 psi | 87% | 2625 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 52,547 psi | 84% | 2572 fps | 97.6% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 46,325 psi | 74% | 2520 fps | 96.5% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 43,584 psi | 70% | 2470 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 38,406 psi | 62% | 2392 fps | 97.6% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 49,269 psi | 79% | 2635 fps | 99.9% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 55,230 psi | 89% | 2549 fps | 100% |
| Bofors RP3 | <<locked>> | 88% | 54,273 psi | 87% | 2526 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 46,325 psi | 74% | 2520 fps | 96.5% |
| Bofors RP7 | <<locked>> | 92% | 53,998 psi | 87% | 2507 fps | 98.6% |
| Hodgdon Benchmark | <<locked>> | 82% | 56,043 psi | 90% | 2464 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 82% | 54,041 psi | 87% | 2513 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 54,824 psi | 88% | 2539 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 94% | 54,810 psi | 88% | 2595 fps | 99.2% |
| Hodgdon H4350 | <<locked>> | 92% | 55,071 psi | 88% | 2559 fps | 98.2% |
| Hodgdon H4895 | <<locked>> | 84% | 56,246 psi | 90% | 2539 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 53,345 psi | 86% | 2530 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 56,014 psi | 90% | 2572 fps | 100% |
| Hodgdon Superformance | <<locked>> | 94% | 54,897 psi | 88% | 2631 fps | 99% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,114 psi | 58% | 1526 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 53,882 psi | 86% | 2497 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 53,113 psi | 85% | 2470 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 56,057 psi | 90% | 2516 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 86% | 55,666 psi | 89% | 2503 fps | 99.1% |
| IMR 4350 | <<locked>> | 96% | 54,302 psi | 87% | 2533 fps | 98.7% |
| IMR 4451 Enduron | <<locked>> | 92% | 55,724 psi | 89% | 2533 fps | 99.1% |
| IMR 4831 | <<locked>> | 98% | 56,217 psi | 90% | 2585 fps | 100% |
| IMR 4895 | <<locked>> | 86% | 55,274 psi | 89% | 2552 fps | 100% |
| IMR 4955 Enduronᴾ | <<locked>> | 100% | 53,548 psi | 86% | 2523 fps | 95.9% |
| IMR 8208 XBR | <<locked>> | 82% | 54,433 psi | 87% | 2480 fps | 100% |
| Lovex D073.6 | <<locked>> | 84% | 55,637 psi | 89% | 2507 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 54,766 psi | 88% | 2461 fps | 100% |
| Lovex S062 | <<locked>> | 88% | 56,217 psi | 90% | 2513 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 55,347 psi | 89% | 2526 fps | 99.7% |
| Lovex S070 | <<locked>> | 94% | 53,055 psi | 85% | 2520 fps | 99% |
| Lovex S071ᴾ | <<locked>> | 100% | 38,392 psi | 62% | 2316 fps | 97% |
| Norma 201 | <<locked>> | 84% | 54,331 psi | 87% | 2477 fps | 100% |
| Norma 202 | <<locked>> | 84% | 54,882 psi | 88% | 2474 fps | 100% |
| Norma 203B | <<locked>> | 86% | 53,156 psi | 85% | 2516 fps | 100% |
| Norma 204 | <<locked>> | 96% | 54,853 psi | 88% | 2579 fps | 97.8% |
| Norma MRPᴾ | <<locked>> | 100% | 48,762 psi | 78% | 2592 fps | 98.4% |
| Norma URP | <<locked>> | 96% | 54,795 psi | 88% | 2585 fps | 100% |
| Ramshot Big Game | <<locked>> | 86% | 53,737 psi | 86% | 2543 fps | 100% |
| Ramshot Hunter | <<locked>> | 96% | 53,316 psi | 85% | 2585 fps | 99.5% |
| Ramshot TAC | <<locked>> | 82% | 54,476 psi | 87% | 2507 fps | 99.7% |
| Ramshot Wild Boar | <<locked>> | 82% | 54,244 psi | 87% | 2520 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,608 psi | 59% | 1562 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 54,868 psi | 88% | 2523 fps | 99.4% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 54,766 psi | 88% | 2592 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 54,070 psi | 87% | 2621 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 55,477 psi | 89% | 2618 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 54,563 psi | 87% | 2648 fps | 100% |
| Rottweil R 901 | <<locked>> | 82% | 55,390 psi | 89% | 2454 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 54,853 psi | 88% | 2477 fps | 100% |
| Rottweil R 903 | <<locked>> | 90% | 54,128 psi | 87% | 2520 fps | 100% |
| Rottweil R 904ᴾ | <<locked>> | 100% | 55,593 psi | 89% | 2559 fps | 96.9% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 51,590 psi | 83% | 2559 fps | 97.6% |
| Rottweil R 907 | <<locked>> | 92% | 53,998 psi | 87% | 2507 fps | 98.6% |
| Shooters World Long Rifle | <<locked>> | 94% | 55,347 psi | 89% | 2526 fps | 99.7% |
| Shooters World Match Rifle | <<locked>> | 84% | 55,637 psi | 89% | 2507 fps | 100% |
| Shooters World Precision | <<locked>> | 88% | 56,217 psi | 90% | 2513 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 53,055 psi | 85% | 2520 fps | 99% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 55,753 psi | 89% | 2575 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 53,113 psi | 85% | 2490 fps | 99.8% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 54,114 psi | 87% | 2510 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 55,709 psi | 89% | 2418 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 55,912 psi | 90% | 2418 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 55,477 psi | 89% | 2487 fps | 99.1% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 51,097 psi | 82% | 2552 fps | 97.5% |
| Somchem S335 | <<locked>> | 84% | 55,042 psi | 88% | 2415 fps | 100% |
| Somchem S341 | <<locked>> | 84% | 56,289 psi | 90% | 2523 fps | 100% |
| Somchem S355 | <<locked>> | 90% | 54,244 psi | 87% | 2516 fps | 100% |
| Somchem S365 | <<locked>> | 98% | 53,156 psi | 85% | 2585 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 52,402 psi | 84% | 2539 fps | 98.4% |
| Vihtavuori N133 | <<locked>> | 84% | 56,101 psi | 90% | 2402 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 54,940 psi | 88% | 2441 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 55,463 psi | 89% | 2457 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 55,724 psi | 89% | 2493 fps | 100% |
| Vihtavuori N160 | <<locked>> | 94% | 53,563 psi | 86% | 2533 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 45,020 psi | 72% | 2415 fps | 96.5% |
| Vihtavuori N530 | <<locked>> | 82% | 54,781 psi | 88% | 2480 fps | 100% |
| Vihtavuori N540 | <<locked>> | 86% | 53,534 psi | 86% | 2457 fps | 100% |
| Vihtavuori N550 | <<locked>> | 96% | 56,057 psi | 90% | 2585 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 48,573 psi | 78% | 2539 fps | 100% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 53,214 psi | 85% | 2510 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 55,071 psi | 88% | 2526 fps | 100% |
| Winchester 760 | <<locked>> | 94% | 55,071 psi | 88% | 2602 fps | 99.2% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 39,204 psi | 63% | 2510 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 84% | 53,896 psi | 86% | 2513 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 49,052 psi | 79% | 2480 fps | 96.7% |
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 2495 | <<locked>> | 80% | 45,934 psi | 74% | 2329 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 51,851 psi | 83% | 2461 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 39,958 psi | 64% | 2238 fps | 95.3% |
| Accurate 3100 | <<locked>> | 90% | 32,996 psi | 53% | 2208 fps | 95.2% |
| Accurate 4064 | <<locked>> | 80% | 43,511 psi | 70% | 2333 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 32,387 psi | 52% | 2201 fps | 96.9% |
| ADI AR 2206H | <<locked>> | 80% | 48,994 psi | 79% | 2438 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 41,698 psi | 67% | 2310 fps | 99.3% |
| ADI AR 2209 | <<locked>> | 94% | 44,367 psi | 71% | 2434 fps | 95.5% |
| ADI Benchmark 8208 | <<locked>> | 80% | 51,097 psi | 82% | 2438 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 52,533 psi | 84% | 2411 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 45,078 psi | 72% | 2490 fps | 99.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 41,698 psi | 67% | 2329 fps | 99.9% |
| Alliant Reloder-15 | <<locked>> | 80% | 44,628 psi | 72% | 2388 fps | 99.7% |
| Alliant Reloder-16 | <<locked>> | 80% | 32,445 psi | 52% | 2215 fps | 97% |
| Alliant Reloder-17 | 57.4 gr | 80% | 36,187 psi | 58% | 2323 fps | 99.4% |
| Alliant Reloder-19 | <<locked>> | 94% | 43,569 psi | 70% | 2425 fps | 95.5% |
| Alliant Reloder-22 | <<locked>> | 98% | 43,410 psi | 70% | 2467 fps | 95.7% |
| Alliant Reloder-23 | <<locked>> | 82% | 25,106 psi | 40% | 2047 fps | 95% |
| Alliant Reloder-25 | <<locked>> | 96% | 33,881 psi | 54% | 2287 fps | 95.8% |
| Alliant Reloder-26 | <<locked>> | 86% | 30,255 psi | 49% | 2244 fps | 95.1% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 48,457 psi | 78% | 2451 fps | 99.8% |
| Bofors RP3 | <<locked>> | 80% | 41,626 psi | 67% | 2339 fps | 100% |
| Bofors RP5 | <<locked>> | 98% | 43,410 psi | 70% | 2467 fps | 95.7% |
| Bofors RP7 | <<locked>> | 82% | 39,697 psi | 64% | 2274 fps | 95.6% |
| Hodgdon Benchmark | <<locked>> | 80% | 52,649 psi | 84% | 2418 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 50,459 psi | 81% | 2464 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 42,221 psi | 68% | 2346 fps | 98.8% |
| Hodgdon H414 | <<locked>> | 82% | 37,014 psi | 59% | 2297 fps | 95.5% |
| Hodgdon H4350 | <<locked>> | 84% | 42,844 psi | 69% | 2362 fps | 95.7% |
| Hodgdon H4895 | <<locked>> | 80% | 49,530 psi | 79% | 2448 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 30,008 psi | 48% | 2126 fps | 97.7% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 45,905 psi | 74% | 2434 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 38,595 psi | 62% | 2356 fps | 95.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,803 psi | 43% | 1358 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 47,572 psi | 76% | 2405 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 49,850 psi | 80% | 2428 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 43,816 psi | 70% | 2339 fps | 99.7% |
| IMR 4166 Enduron | <<locked>> | 80% | 46,296 psi | 74% | 2362 fps | 97.8% |
| IMR 4350 | <<locked>> | 86% | 39,914 psi | 64% | 2300 fps | 95.6% |
| IMR 4451 Enduron | <<locked>> | 80% | 38,682 psi | 62% | 2251 fps | 95.7% |
| IMR 4831 | <<locked>> | 80% | 31,517 psi | 51% | 2169 fps | 96.6% |
| IMR 4895 | <<locked>> | 80% | 45,759 psi | 73% | 2415 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 98% | 50,212 psi | 81% | 2474 fps | 95.1% |
| IMR 8208 XBR | <<locked>> | 80% | 51,097 psi | 82% | 2438 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 48,805 psi | 78% | 2418 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 48,704 psi | 78% | 2379 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 44,077 psi | 71% | 2343 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 36,114 psi | 58% | 2208 fps | 96.5% |
| Lovex S070 | <<locked>> | 82% | 36,637 psi | 59% | 2238 fps | 95.5% |
| Lovex S071 | <<locked>> | 96% | 33,808 psi | 54% | 2224 fps | 95.5% |
| Norma 201 | <<locked>> | 80% | 47,993 psi | 77% | 2388 fps | 100% |
| Norma 202 | <<locked>> | 80% | 48,443 psi | 78% | 2388 fps | 100% |
| Norma 203B | <<locked>> | 80% | 44,005 psi | 71% | 2379 fps | 99.9% |
| Norma 204 | <<locked>> | 90% | 44,991 psi | 72% | 2428 fps | 95.7% |
| Norma MRP | <<locked>> | 92% | 37,391 psi | 60% | 2379 fps | 95.2% |
| Norma URP | <<locked>> | 80% | 32,561 psi | 52% | 2201 fps | 96.8% |
| Ramshot Big Game | <<locked>> | 80% | 43,859 psi | 70% | 2395 fps | 99.8% |
| Ramshot Hunter | <<locked>> | 82% | 33,794 psi | 54% | 2238 fps | 95.2% |
| Ramshot TAC | <<locked>> | 80% | 50,966 psi | 82% | 2457 fps | 99.5% |
| Ramshot Wild Boar | <<locked>> | 80% | 50,894 psi | 82% | 2474 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,325 psi | 44% | 1394 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 42,424 psi | 68% | 2329 fps | 97.5% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 47,645 psi | 76% | 2487 fps | 99.9% |
| ReloadSwiss RS 60 | 57.4 gr | 80% | 38,522 psi | 62% | 2375 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 32,126 psi | 52% | 2221 fps | 96.4% |
| ReloadSwiss RS 70 | 58.3 gr | 80% | 31,821 psi | 51% | 2218 fps | 95.3% |
| Rottweil R 901 | <<locked>> | 80% | 52,214 psi | 84% | 2415 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 45,905 psi | 74% | 2352 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 39,189 psi | 63% | 2290 fps | 99.7% |
| Rottweil R 904 | <<locked>> | 96% | 48,994 psi | 79% | 2461 fps | 95.5% |
| Rottweil R 905 | <<locked>> | 94% | 42,337 psi | 68% | 2408 fps | 95.4% |
| Rottweil R 907 | <<locked>> | 82% | 39,697 psi | 64% | 2274 fps | 95.6% |
| Shooters World Long Rifle | <<locked>> | 80% | 36,114 psi | 58% | 2208 fps | 96.5% |
| Shooters World Match Rifle | <<locked>> | 80% | 48,805 psi | 78% | 2418 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 44,077 psi | 71% | 2343 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 36,637 psi | 59% | 2238 fps | 95.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 40,132 psi | 64% | 2336 fps | 99.5% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 49,559 psi | 79% | 2438 fps | 99.6% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 47,471 psi | 76% | 2415 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 49,269 psi | 79% | 2336 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 41,336 psi | 66% | 2224 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 37,681 psi | 60% | 2205 fps | 95.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 41,930 psi | 67% | 2402 fps | 95.3% |
| Somchem S335 | <<locked>> | 80% | 48,733 psi | 78% | 2336 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 49,356 psi | 79% | 2431 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 39,813 psi | 64% | 2293 fps | 99.7% |
| Somchem S365 | <<locked>> | 80% | 29,269 psi | 47% | 2162 fps | 98.8% |
| Somchem S385 | <<locked>> | 90% | 37,913 psi | 61% | 2297 fps | 95% |
| Vihtavuori N133 | <<locked>> | 80% | 49,734 psi | 80% | 2323 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 45,788 psi | 73% | 2323 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 45,934 psi | 74% | 2333 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 37,913 psi | 61% | 2234 fps | 99.9% |
| Vihtavuori N160 | <<locked>> | 80% | 33,939 psi | 54% | 2201 fps | 97.1% |
| Vihtavuori N165 | <<locked>> | 96% | 39,668 psi | 64% | 2320 fps | 95% |
| Vihtavuori N530 | <<locked>> | 80% | 51,343 psi | 82% | 2434 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 44,280 psi | 71% | 2329 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 33,446 psi | 54% | 2205 fps | 96.8% |
| Vihtavuori N555 | <<locked>> | 82% | 27,006 psi | 43% | 2113 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 33,446 psi | 54% | 2182 fps | 98.9% |
| Winchester 748 | <<locked>> | 80% | 51,590 psi | 83% | 2480 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 37,014 psi | 59% | 2297 fps | 95.5% |
| Winchester StaBALL HD | <<locked>> | 86% | 25,048 psi | 40% | 2116 fps | 95.5% |
| Winchester StaBALL Match | <<locked>> | 80% | 47,224 psi | 76% | 2421 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 42,801 psi | 69% | 2379 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 119 powders for .338 Win Mag. loaded with the .338 | 250gr | Alaska Bullet Works Kodiak PP SPBC. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,648 fps; across all powders the maximum-charge window runs from 1,526 fps to 2,648 fps. Accurate 3100 gives the best case fill at 100 %, and 119 of the 119 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (430 MPa), the top charges use 58–90 %, leaving at least 10 % headroom. The 250.0 gr projectile in 0.338" calls for a 1:16.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate MAGPRO, ADI AR 2209 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 .338 Win Mag. with the .338 | 250gr | Alaska Bullet Works Kodiak PP SPBC they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate MAGPRO, ADI AR 2213, Hodgdon H1000 burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.