Load Specifications
Bullet Manufacturer:Berger
Bullet Weight:250 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:1:11.5
Load data in caliber .338 Win Mag. with .338 | 250gr | Berger Hybrid OTM bullet and 103 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, 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.
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>> | 82% | 53,040 psi | 85% | 2359 fps | 100% |
| Accurate 2495 | <<locked>> | 88% | 55,201 psi | 89% | 2428 fps | 100% |
| Accurate 2520 | <<locked>> | 82% | 53,403 psi | 86% | 2448 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 54,230 psi | 87% | 2441 fps | 98% |
| Accurate 3100ᴾ | <<locked>> | 100% | 42,047 psi | 67% | 2359 fps | 97.4% |
| Accurate 4064 | <<locked>> | 90% | 55,347 psi | 89% | 2474 fps | 100% |
| Accurate 4350 | <<locked>> | 98% | 54,853 psi | 88% | 2559 fps | 100% |
| ADI AR 2206H | <<locked>> | 86% | 55,593 psi | 89% | 2503 fps | 100% |
| ADI AR 2208 | <<locked>> | 90% | 53,084 psi | 85% | 2461 fps | 100% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 49,763 psi | 80% | 2490 fps | 96.3% |
| ADI Benchmark 8208 | <<locked>> | 84% | 54,520 psi | 87% | 2457 fps | 100% |
| Alliant AR-Comp | <<locked>> | 84% | 55,419 psi | 89% | 2425 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 88% | 55,114 psi | 88% | 2615 fps | 100% |
| Alliant Power Pro Varmintᴾ | <<locked>> | 100% | 49,530 psi | 79% | 2490 fps | 96.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 90% | 53,258 psi | 85% | 2480 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 88% | 53,621 psi | 86% | 2497 fps | 100% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 55,927 psi | 90% | 2608 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 94% | 53,650 psi | 86% | 2592 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 48,791 psi | 78% | 2484 fps | 96.3% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 40,132 psi | 64% | 2385 fps | 99.7% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 44,831 psi | 72% | 2536 fps | 99.2% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 55,143 psi | 88% | 2520 fps | 100% |
| Bofors RP3 | <<locked>> | 90% | 53,548 psi | 86% | 2493 fps | 100% |
| Bofors RP7 | <<locked>> | 94% | 53,896 psi | 86% | 2474 fps | 98.1% |
| Hodgdon Benchmark | <<locked>> | 84% | 56,217 psi | 90% | 2438 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 84% | 53,824 psi | 86% | 2487 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 82% | 55,767 psi | 89% | 2575 fps | 100% |
| Hodgdon H380 | <<locked>> | 90% | 54,679 psi | 88% | 2510 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 96% | 53,983 psi | 87% | 2559 fps | 98.8% |
| Hodgdon H4350 | <<locked>> | 94% | 54,723 psi | 88% | 2523 fps | 97.7% |
| Hodgdon H4895 | <<locked>> | 86% | 56,144 psi | 90% | 2513 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 52,272 psi | 84% | 2493 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 88% | 55,405 psi | 89% | 2543 fps | 100% |
| Hodgdon Superformance | <<locked>> | 96% | 54,534 psi | 87% | 2595 fps | 98.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,810 psi | 57% | 1493 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 53,838 psi | 86% | 2470 fps | 100% |
| IMR 3031 | <<locked>> | 86% | 56,231 psi | 90% | 2487 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 55,912 psi | 90% | 2487 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 88% | 55,898 psi | 90% | 2474 fps | 98.8% |
| IMR 4350 | <<locked>> | 98% | 53,983 psi | 87% | 2500 fps | 98.2% |
| IMR 4451 Enduron | <<locked>> | 94% | 55,448 psi | 89% | 2497 fps | 98.7% |
| IMR 4831ᴾ | <<locked>> | 100% | 55,376 psi | 89% | 2552 fps | 100% |
| IMR 4895 | <<locked>> | 88% | 54,926 psi | 88% | 2523 fps | 100% |
| IMR 8208 XBR | <<locked>> | 84% | 54,520 psi | 87% | 2457 fps | 100% |
| Lovex D073.6 | <<locked>> | 86% | 55,259 psi | 89% | 2480 fps | 100% |
| Lovex S060 | <<locked>> | 86% | 55,056 psi | 88% | 2438 fps | 100% |
| Lovex S062 | <<locked>> | 90% | 56,014 psi | 90% | 2484 fps | 100% |
| Lovex S065 | <<locked>> | 96% | 54,984 psi | 88% | 2493 fps | 99.5% |
| Lovex S070 | <<locked>> | 98% | 55,782 psi | 89% | 2526 fps | 99% |
| Norma 201 | <<locked>> | 86% | 54,360 psi | 87% | 2454 fps | 100% |
| Norma 202 | <<locked>> | 86% | 54,911 psi | 88% | 2451 fps | 100% |
| Norma 203B | <<locked>> | 90% | 56,260 psi | 90% | 2533 fps | 100% |
| Norma 204 | <<locked>> | 98% | 54,273 psi | 87% | 2543 fps | 97.1% |
| Norma MRPᴾ | <<locked>> | 100% | 44,643 psi | 72% | 2493 fps | 96.9% |
| Norma URP | <<locked>> | 98% | 53,809 psi | 86% | 2546 fps | 99.9% |
| Ramshot Big Game | <<locked>> | 88% | 53,243 psi | 85% | 2513 fps | 100% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 56,231 psi | 90% | 2595 fps | 99.5% |
| Ramshot TAC | <<locked>> | 84% | 54,665 psi | 88% | 2480 fps | 99.6% |
| Ramshot Wild Boar | <<locked>> | 84% | 54,389 psi | 87% | 2497 fps | 100% |
| Ramshot X-Terminator | <<locked>> | 82% | 55,114 psi | 88% | 2457 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,303 psi | 58% | 1529 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 54,752 psi | 88% | 2493 fps | 99.1% |
| ReloadSwiss RS 52 | <<locked>> | 86% | 54,259 psi | 87% | 2559 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 92% | 53,548 psi | 86% | 2592 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 54,433 psi | 87% | 2582 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 98% | 53,998 psi | 87% | 2608 fps | 99.8% |
| Rottweil R 901 | <<locked>> | 84% | 55,303 psi | 89% | 2428 fps | 100% |
| Rottweil R 902 | <<locked>> | 88% | 54,737 psi | 88% | 2451 fps | 100% |
| Rottweil R 903 | <<locked>> | 92% | 53,432 psi | 86% | 2487 fps | 100% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 47,442 psi | 76% | 2464 fps | 96.2% |
| Rottweil R 907 | <<locked>> | 94% | 53,896 psi | 86% | 2474 fps | 98.1% |
| Shooters World Long Rifle | <<locked>> | 96% | 54,984 psi | 88% | 2493 fps | 99.5% |
| Shooters World Match Rifle | <<locked>> | 86% | 55,259 psi | 89% | 2480 fps | 100% |
| Shooters World Precision | <<locked>> | 90% | 56,014 psi | 90% | 2484 fps | 100% |
| Shooters World SW4350 | <<locked>> | 98% | 55,782 psi | 89% | 2526 fps | 99% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 55,172 psi | 88% | 2543 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 53,098 psi | 85% | 2461 fps | 99.7% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 54,027 psi | 87% | 2480 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 55,782 psi | 89% | 2392 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 55,941 psi | 90% | 2392 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 55,317 psi | 89% | 2454 fps | 98.7% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 47,007 psi | 75% | 2461 fps | 96.1% |
| Somchem S321 | <<locked>> | 82% | 55,622 psi | 89% | 2487 fps | 100% |
| Somchem S335 | <<locked>> | 86% | 55,172 psi | 88% | 2392 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 56,231 psi | 90% | 2497 fps | 100% |
| Somchem S355 | <<locked>> | 92% | 53,838 psi | 86% | 2484 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 51,692 psi | 83% | 2546 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 48,182 psi | 77% | 2451 fps | 97.2% |
| Vihtavuori N130 | <<locked>> | 82% | 55,593 psi | 89% | 2356 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 56,072 psi | 90% | 2375 fps | 100% |
| Vihtavuori N135 | <<locked>> | 88% | 54,679 psi | 88% | 2415 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 55,230 psi | 89% | 2431 fps | 100% |
| Vihtavuori N150 | <<locked>> | 94% | 55,187 psi | 88% | 2464 fps | 100% |
| Vihtavuori N160 | <<locked>> | 98% | 56,420 psi | 90% | 2543 fps | 100% |
| Vihtavuori N530 | <<locked>> | 84% | 55,013 psi | 88% | 2457 fps | 100% |
| Vihtavuori N540 | <<locked>> | 88% | 53,519 psi | 86% | 2434 fps | 100% |
| Vihtavuori N550 | <<locked>> | 98% | 55,434 psi | 89% | 2549 fps | 99.9% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 44,063 psi | 71% | 2451 fps | 99.6% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 52,881 psi | 85% | 2477 fps | 100% |
| Winchester 748 | <<locked>> | 84% | 54,969 psi | 88% | 2500 fps | 100% |
| Winchester 760 | <<locked>> | 96% | 54,259 psi | 87% | 2562 fps | 98.8% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 35,955 psi | 58% | 2405 fps | 99.8% |
| Winchester StaBALL Match | <<locked>> | 86% | 53,606 psi | 86% | 2484 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% | 49,966 psi | 80% | 2323 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 42,685 psi | 68% | 2267 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 49,748 psi | 80% | 2398 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 41,901 psi | 67% | 2251 fps | 95.3% |
| Accurate 3100 | <<locked>> | 94% | 34,360 psi | 55% | 2218 fps | 95.1% |
| Accurate 4064 | <<locked>> | 80% | 40,350 psi | 65% | 2267 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 29,617 psi | 47% | 2123 fps | 95.3% |
| ADI AR 2206H | <<locked>> | 80% | 45,992 psi | 74% | 2365 fps | 99.8% |
| ADI AR 2208 | <<locked>> | 80% | 39,102 psi | 63% | 2238 fps | 98.6% |
| ADI AR 2209 | <<locked>> | 98% | 46,847 psi | 75% | 2444 fps | 95.5% |
| ADI Benchmark 8208 | <<locked>> | 80% | 48,037 psi | 77% | 2369 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 48,849 psi | 78% | 2346 fps | 100% |
| Alliant Power Pro 2000-MR | 54.3 gr | 80% | 42,018 psi | 67% | 2408 fps | 99.2% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 46,456 psi | 74% | 2441 fps | 95.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 38,943 psi | 62% | 2260 fps | 99.6% |
| Alliant Reloder-15 | <<locked>> | 80% | 41,655 psi | 67% | 2313 fps | 99.2% |
| Alliant Reloder-16 | <<locked>> | 80% | 30,284 psi | 49% | 2133 fps | 95.4% |
| Alliant Reloder-17 | 53.4 gr | 80% | 33,518 psi | 54% | 2244 fps | 98.5% |
| Alliant Reloder-19 | <<locked>> | 98% | 45,818 psi | 73% | 2434 fps | 95.5% |
| Alliant Reloder-23 | <<locked>> | 86% | 26,310 psi | 42% | 2060 fps | 95.1% |
| Alliant Reloder-26 | <<locked>> | 90% | 31,705 psi | 51% | 2257 fps | 95.2% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 45,237 psi | 73% | 2375 fps | 99.3% |
| Bofors RP3 | <<locked>> | 80% | 38,638 psi | 62% | 2267 fps | 99.6% |
| Bofors RP7 | <<locked>> | 86% | 42,105 psi | 68% | 2290 fps | 95.7% |
| Hodgdon Benchmark | <<locked>> | 80% | 49,893 psi | 80% | 2356 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 47,152 psi | 76% | 2395 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 80% | 51,982 psi | 83% | 2523 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 39,508 psi | 63% | 2270 fps | 97.9% |
| Hodgdon H414 | <<locked>> | 86% | 38,972 psi | 62% | 2313 fps | 95.6% |
| Hodgdon H4350 | <<locked>> | 86% | 42,685 psi | 68% | 2333 fps | 95% |
| Hodgdon H4895 | <<locked>> | 80% | 46,412 psi | 74% | 2375 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 27,804 psi | 45% | 2051 fps | 96.3% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 42,511 psi | 68% | 2356 fps | 99.9% |
| Hodgdon Superformance | <<locked>> | 88% | 41,046 psi | 66% | 2375 fps | 95.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,701 psi | 43% | 1332 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 44,643 psi | 72% | 2336 fps | 99.9% |
| IMR 3031 | <<locked>> | 80% | 46,325 psi | 74% | 2362 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 41,075 psi | 66% | 2264 fps | 99.1% |
| IMR 4166 Enduron | <<locked>> | 80% | 43,482 psi | 70% | 2287 fps | 96.6% |
| IMR 4350 | <<locked>> | 90% | 42,105 psi | 68% | 2313 fps | 95.7% |
| IMR 4451 Enduron | <<locked>> | 82% | 38,638 psi | 62% | 2224 fps | 95.1% |
| IMR 4831 | <<locked>> | 80% | 28,964 psi | 46% | 2090 fps | 95% |
| IMR 4895 | <<locked>> | 80% | 42,685 psi | 68% | 2339 fps | 99.6% |
| IMR 8208 XBR | <<locked>> | 80% | 48,037 psi | 77% | 2369 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 45,368 psi | 73% | 2349 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 46,021 psi | 74% | 2310 fps | 99.8% |
| Lovex S062 | <<locked>> | 80% | 41,234 psi | 66% | 2270 fps | 99.9% |
| Lovex S065 | <<locked>> | 80% | 33,779 psi | 54% | 2136 fps | 95.2% |
| Lovex S070 | <<locked>> | 86% | 38,653 psi | 62% | 2254 fps | 95.6% |
| Norma 201 | <<locked>> | 80% | 45,078 psi | 72% | 2323 fps | 100% |
| Norma 202 | <<locked>> | 80% | 45,469 psi | 73% | 2326 fps | 100% |
| Norma 203B | <<locked>> | 80% | 41,031 psi | 66% | 2303 fps | 99.4% |
| Norma 204 | <<locked>> | 94% | 47,601 psi | 76% | 2441 fps | 95.7% |
| Norma MRP | <<locked>> | 96% | 39,204 psi | 63% | 2388 fps | 95.2% |
| Norma URP | <<locked>> | 80% | 30,226 psi | 48% | 2126 fps | 95.3% |
| Ramshot Big Game | <<locked>> | 80% | 40,770 psi | 65% | 2323 fps | 99.3% |
| Ramshot Hunter | <<locked>> | 86% | 35,824 psi | 57% | 2257 fps | 95.4% |
| Ramshot TAC | <<locked>> | 80% | 47,892 psi | 77% | 2382 fps | 98.8% |
| Ramshot Wild Boar | <<locked>> | 80% | 47,514 psi | 76% | 2398 fps | 99.9% |
| Ramshot X-Terminator | <<locked>> | 80% | 51,822 psi | 83% | 2415 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,006 psi | 43% | 1365 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 39,769 psi | 64% | 2254 fps | 96.3% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 44,106 psi | 71% | 2408 fps | 99.5% |
| ReloadSwiss RS 60 | 53.4 gr | 80% | 35,679 psi | 57% | 2297 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 31,488 psi | 50% | 2185 fps | 95.6% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 33,808 psi | 54% | 2241 fps | 95.6% |
| Rottweil R 901 | <<locked>> | 80% | 49,240 psi | 79% | 2349 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 42,989 psi | 69% | 2280 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 36,419 psi | 58% | 2218 fps | 99.1% |
| Rottweil R 905 | <<locked>> | 98% | 44,353 psi | 71% | 2415 fps | 95.4% |
| Rottweil R 907 | <<locked>> | 86% | 42,105 psi | 68% | 2290 fps | 95.7% |
| Shooters World Long Rifle | <<locked>> | 80% | 33,779 psi | 54% | 2136 fps | 95.2% |
| Shooters World Match Rifle | <<locked>> | 80% | 45,368 psi | 73% | 2349 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 41,234 psi | 66% | 2270 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 86% | 38,653 psi | 62% | 2254 fps | 95.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 37,260 psi | 60% | 2264 fps | 98.8% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 46,485 psi | 75% | 2365 fps | 99% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 44,512 psi | 71% | 2343 fps | 99.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 46,485 psi | 75% | 2274 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 38,812 psi | 62% | 2162 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 37,507 psi | 60% | 2178 fps | 95% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 43,961 psi | 70% | 2411 fps | 95.2% |
| Somchem S321 | <<locked>> | 80% | 52,040 psi | 83% | 2441 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 45,977 psi | 74% | 2274 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 46,035 psi | 74% | 2356 fps | 99.8% |
| Somchem S355 | <<locked>> | 80% | 37,115 psi | 60% | 2221 fps | 99.1% |
| Somchem S365 | <<locked>> | 80% | 27,108 psi | 43% | 2087 fps | 97.6% |
| Somchem S385 | <<locked>> | 94% | 39,595 psi | 63% | 2306 fps | 95% |
| Vihtavuori N130 | <<locked>> | 80% | 52,402 psi | 84% | 2316 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 46,891 psi | 75% | 2264 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 42,714 psi | 68% | 2260 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 43,120 psi | 69% | 2270 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 35,360 psi | 57% | 2165 fps | 99.6% |
| Vihtavuori N160 | <<locked>> | 80% | 31,415 psi | 50% | 2126 fps | 95.7% |
| Vihtavuori N530 | <<locked>> | 80% | 48,298 psi | 77% | 2365 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 41,553 psi | 67% | 2267 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 31,024 psi | 50% | 2129 fps | 95.3% |
| Vihtavuori N555 | <<locked>> | 86% | 28,065 psi | 45% | 2126 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 31,169 psi | 50% | 2106 fps | 97.8% |
| Winchester 748 | <<locked>> | 80% | 48,022 psi | 77% | 2408 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 39,175 psi | 63% | 2316 fps | 95.6% |
| Winchester StaBALL HD | <<locked>> | 90% | 26,194 psi | 42% | 2126 fps | 95.5% |
| Winchester StaBALL Match | <<locked>> | 80% | 44,034 psi | 71% | 2346 fps | 99.9% |
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 103 powders for .338 Win Mag. loaded with the .338 | 250gr | Berger Hybrid OTM. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,615 fps; across all powders the maximum-charge window runs from 1,493 fps to 2,615 fps. Accurate 3100 gives the best case fill at 100 %, and 103 of the 103 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (430 MPa), the top charges use 57–90 %, leaving at least 10 % headroom. The 250.0 gr projectile in 0.338" calls for a 1:11.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2209, Alliant Power Pro Varmint 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, Alliant Reloder-17, ReloadSwiss RS 60 rank at the top here: for .338 Win Mag. with the .338 | 250gr | Berger Hybrid OTM 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.