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 Elite Hunter 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, Hodgdon Superformance 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>> | 84% | 55,956 psi | 90% | 2388 fps | 100% |
| Accurate 2495 | <<locked>> | 88% | 54,534 psi | 87% | 2415 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 56,347 psi | 90% | 2477 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 53,490 psi | 86% | 2425 fps | 97.8% |
| Accurate 3100ᴾ | <<locked>> | 100% | 41,365 psi | 66% | 2346 fps | 97.2% |
| Accurate 4064 | <<locked>> | 90% | 54,737 psi | 88% | 2464 fps | 100% |
| Accurate 4350 | <<locked>> | 98% | 54,027 psi | 87% | 2546 fps | 99.9% |
| ADI AR 2206H | <<locked>> | 86% | 55,027 psi | 88% | 2493 fps | 100% |
| ADI AR 2208 | <<locked>> | 92% | 56,043 psi | 90% | 2493 fps | 100% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 49,429 psi | 79% | 2480 fps | 96.1% |
| ADI Benchmark 8208 | <<locked>> | 84% | 53,925 psi | 86% | 2444 fps | 100% |
| Alliant AR-Comp | <<locked>> | 84% | 55,027 psi | 88% | 2418 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 88% | 54,592 psi | 88% | 2605 fps | 100% |
| Alliant Power Pro Varmintᴾ | <<locked>> | 100% | 48,936 psi | 78% | 2477 fps | 96.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 55,927 psi | 90% | 2510 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 88% | 53,069 psi | 85% | 2487 fps | 100% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 55,492 psi | 89% | 2595 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 94% | 52,939 psi | 85% | 2579 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 48,225 psi | 77% | 2467 fps | 96% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 39,537 psi | 63% | 2372 fps | 99.6% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 44,077 psi | 71% | 2516 fps | 99.1% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 54,621 psi | 88% | 2510 fps | 99.9% |
| Bofors RP3 | <<locked>> | 90% | 53,026 psi | 85% | 2480 fps | 100% |
| Bofors RP7 | <<locked>> | 94% | 53,113 psi | 85% | 2457 fps | 97.9% |
| Hodgdon Benchmark | <<locked>> | 84% | 55,637 psi | 89% | 2425 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 84% | 53,301 psi | 85% | 2474 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 82% | 55,158 psi | 88% | 2562 fps | 100% |
| Hodgdon H380 | <<locked>> | 90% | 53,911 psi | 86% | 2493 fps | 99.7% |
| Hodgdon H414 | <<locked>> | 96% | 53,519 psi | 86% | 2546 fps | 98.6% |
| Hodgdon H4350 | <<locked>> | 94% | 54,302 psi | 87% | 2510 fps | 97.6% |
| Hodgdon H4895 | <<locked>> | 86% | 55,622 psi | 89% | 2500 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 51,532 psi | 83% | 2480 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 88% | 54,853 psi | 88% | 2533 fps | 100% |
| Hodgdon Superformance | <<locked>> | 96% | 53,911 psi | 86% | 2579 fps | 98.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,607 psi | 57% | 1486 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 53,272 psi | 85% | 2457 fps | 100% |
| IMR 3031 | <<locked>> | 86% | 55,811 psi | 89% | 2477 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 55,361 psi | 89% | 2474 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 88% | 55,419 psi | 89% | 2461 fps | 98.7% |
| IMR 4350 | <<locked>> | 98% | 53,359 psi | 86% | 2484 fps | 98% |
| IMR 4451 Enduron | <<locked>> | 94% | 55,013 psi | 88% | 2487 fps | 98.6% |
| IMR 4831ᴾ | <<locked>> | 100% | 54,650 psi | 88% | 2536 fps | 100% |
| IMR 4895 | <<locked>> | 88% | 54,360 psi | 87% | 2510 fps | 100% |
| IMR 8208 XBR | <<locked>> | 84% | 53,925 psi | 86% | 2444 fps | 100% |
| Lovex D073.6 | <<locked>> | 86% | 54,650 psi | 88% | 2467 fps | 100% |
| Lovex S060 | <<locked>> | 86% | 54,549 psi | 87% | 2425 fps | 100% |
| Lovex S062 | <<locked>> | 90% | 55,448 psi | 89% | 2474 fps | 100% |
| Lovex S065 | <<locked>> | 96% | 54,520 psi | 87% | 2484 fps | 99.4% |
| Lovex S070 | <<locked>> | 98% | 55,317 psi | 89% | 2513 fps | 98.9% |
| Norma 201 | <<locked>> | 86% | 53,809 psi | 86% | 2441 fps | 100% |
| Norma 202 | <<locked>> | 86% | 54,317 psi | 87% | 2441 fps | 100% |
| Norma 203B | <<locked>> | 90% | 55,724 psi | 89% | 2520 fps | 100% |
| Norma 204 | <<locked>> | 98% | 53,940 psi | 86% | 2530 fps | 97% |
| Norma MRPᴾ | <<locked>> | 100% | 44,077 psi | 71% | 2477 fps | 96.7% |
| Norma URP | <<locked>> | 98% | 53,287 psi | 85% | 2536 fps | 99.9% |
| Ramshot Big Game | <<locked>> | 90% | 56,318 psi | 90% | 2546 fps | 100% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 55,579 psi | 89% | 2582 fps | 99.4% |
| Ramshot TAC | <<locked>> | 84% | 54,186 psi | 87% | 2467 fps | 99.5% |
| Ramshot Wild Boar | <<locked>> | 84% | 53,621 psi | 86% | 2480 fps | 100% |
| Ramshot X-Terminator | <<locked>> | 82% | 54,607 psi | 88% | 2448 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,085 psi | 58% | 1522 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 54,273 psi | 87% | 2480 fps | 99% |
| ReloadSwiss RS 52 | <<locked>> | 86% | 53,359 psi | 86% | 2543 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 56,405 psi | 90% | 2621 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 53,708 psi | 86% | 2566 fps | 99.8% |
| ReloadSwiss RS 70 | <<locked>> | 98% | 53,374 psi | 86% | 2595 fps | 99.8% |
| Rottweil R 901 | <<locked>> | 84% | 54,940 psi | 88% | 2421 fps | 100% |
| Rottweil R 902 | <<locked>> | 88% | 54,143 psi | 87% | 2438 fps | 100% |
| Rottweil R 903 | <<locked>> | 92% | 52,852 psi | 85% | 2474 fps | 100% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 46,760 psi | 75% | 2451 fps | 95.9% |
| Rottweil R 907 | <<locked>> | 94% | 53,113 psi | 85% | 2457 fps | 97.9% |
| Shooters World Long Rifle | <<locked>> | 96% | 54,520 psi | 87% | 2484 fps | 99.4% |
| Shooters World Match Rifle | <<locked>> | 86% | 54,650 psi | 88% | 2467 fps | 100% |
| Shooters World Precision | <<locked>> | 90% | 55,448 psi | 89% | 2474 fps | 100% |
| Shooters World SW4350 | <<locked>> | 98% | 55,317 psi | 89% | 2513 fps | 98.9% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 54,433 psi | 87% | 2530 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 56,130 psi | 90% | 2493 fps | 99.8% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 53,243 psi | 85% | 2467 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 55,187 psi | 88% | 2382 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 55,376 psi | 89% | 2382 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 54,621 psi | 88% | 2441 fps | 98.6% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 46,340 psi | 74% | 2444 fps | 95.8% |
| Somchem S321 | <<locked>> | 82% | 55,085 psi | 88% | 2474 fps | 100% |
| Somchem S335 | <<locked>> | 86% | 54,621 psi | 88% | 2382 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 55,738 psi | 89% | 2487 fps | 100% |
| Somchem S355 | <<locked>> | 92% | 53,330 psi | 86% | 2474 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 51,198 psi | 82% | 2536 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 47,529 psi | 76% | 2434 fps | 96.9% |
| Vihtavuori N130 | <<locked>> | 82% | 55,216 psi | 89% | 2346 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 55,463 psi | 89% | 2365 fps | 100% |
| Vihtavuori N135 | <<locked>> | 88% | 54,027 psi | 87% | 2405 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 54,665 psi | 88% | 2418 fps | 100% |
| Vihtavuori N150 | <<locked>> | 94% | 54,694 psi | 88% | 2454 fps | 100% |
| Vihtavuori N160 | <<locked>> | 98% | 55,637 psi | 89% | 2526 fps | 99.9% |
| Vihtavuori N530 | <<locked>> | 84% | 54,404 psi | 87% | 2444 fps | 100% |
| Vihtavuori N540 | <<locked>> | 90% | 56,202 psi | 90% | 2464 fps | 100% |
| Vihtavuori N550 | <<locked>> | 98% | 54,723 psi | 88% | 2536 fps | 99.9% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 43,584 psi | 70% | 2438 fps | 99.5% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 55,811 psi | 89% | 2510 fps | 100% |
| Winchester 748 | <<locked>> | 84% | 54,389 psi | 87% | 2487 fps | 100% |
| Winchester 760 | <<locked>> | 96% | 53,519 psi | 86% | 2546 fps | 98.6% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 35,505 psi | 57% | 2388 fps | 99.7% |
| Winchester StaBALL Match | <<locked>> | 86% | 53,084 psi | 85% | 2474 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% | 49,559 psi | 79% | 2313 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 42,264 psi | 68% | 2257 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 49,182 psi | 79% | 2388 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 41,423 psi | 66% | 2238 fps | 95% |
| Accurate 3100 | <<locked>> | 96% | 36,187 psi | 58% | 2251 fps | 95.7% |
| Accurate 4064 | <<locked>> | 80% | 40,001 psi | 64% | 2257 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 29,283 psi | 47% | 2110 fps | 95.1% |
| ADI AR 2206H | <<locked>> | 80% | 45,629 psi | 73% | 2356 fps | 99.8% |
| ADI AR 2208 | <<locked>> | 80% | 38,798 psi | 62% | 2228 fps | 98.5% |
| ADI AR 2209 | <<locked>> | 98% | 46,296 psi | 74% | 2428 fps | 95.2% |
| ADI Benchmark 8208 | <<locked>> | 80% | 47,718 psi | 77% | 2359 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 48,399 psi | 78% | 2336 fps | 100% |
| Alliant Power Pro 2000-MR | 53.7 gr | 80% | 41,510 psi | 67% | 2395 fps | 99.1% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 45,876 psi | 74% | 2425 fps | 95.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 38,595 psi | 62% | 2251 fps | 99.5% |
| Alliant Reloder-15 | <<locked>> | 80% | 41,350 psi | 66% | 2303 fps | 99.1% |
| Alliant Reloder-16 | <<locked>> | 80% | 30,023 psi | 48% | 2123 fps | 95.2% |
| Alliant Reloder-17 | 52.9 gr | 80% | 33,272 psi | 53% | 2234 fps | 98.3% |
| Alliant Reloder-19 | <<locked>> | 98% | 45,223 psi | 73% | 2418 fps | 95.2% |
| Alliant Reloder-23 | <<locked>> | 88% | 27,543 psi | 44% | 2093 fps | 95.8% |
| Alliant Reloder-26 | <<locked>> | 92% | 33,489 psi | 54% | 2297 fps | 95.9% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 44,715 psi | 72% | 2362 fps | 99.2% |
| Bofors RP3 | <<locked>> | 80% | 38,116 psi | 61% | 2251 fps | 99.5% |
| Bofors RP7 | <<locked>> | 86% | 41,669 psi | 67% | 2277 fps | 95.4% |
| Hodgdon Benchmark | <<locked>> | 80% | 49,284 psi | 79% | 2343 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 46,615 psi | 75% | 2382 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 80% | 51,372 psi | 82% | 2510 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 38,972 psi | 62% | 2257 fps | 97.7% |
| Hodgdon H414 | <<locked>> | 86% | 38,537 psi | 62% | 2300 fps | 95.3% |
| Hodgdon H4350 | <<locked>> | 88% | 44,788 psi | 72% | 2365 fps | 95.5% |
| Hodgdon H4895 | <<locked>> | 80% | 46,064 psi | 74% | 2365 fps | 99.9% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 27,557 psi | 44% | 2037 fps | 96.1% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 41,959 psi | 67% | 2343 fps | 99.9% |
| Hodgdon Superformance | 61.5 gr | 88% | 40,698 psi | 65% | 2362 fps | 95.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,629 psi | 43% | 1325 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 44,092 psi | 71% | 2323 fps | 99.8% |
| IMR 3031 | <<locked>> | 80% | 45,934 psi | 74% | 2352 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 40,756 psi | 65% | 2254 fps | 99% |
| IMR 4166 Enduron | <<locked>> | 80% | 43,221 psi | 69% | 2274 fps | 96.5% |
| IMR 4350 | <<locked>> | 90% | 41,698 psi | 67% | 2300 fps | 95.5% |
| IMR 4451 Enduron | <<locked>> | 84% | 40,727 psi | 65% | 2260 fps | 95.7% |
| IMR 4831 | <<locked>> | 82% | 30,516 psi | 49% | 2123 fps | 95.6% |
| IMR 4895 | <<locked>> | 80% | 42,351 psi | 68% | 2329 fps | 99.6% |
| IMR 8208 XBR | <<locked>> | 80% | 47,718 psi | 77% | 2359 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 44,817 psi | 72% | 2336 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 45,498 psi | 73% | 2297 fps | 99.8% |
| Lovex S062 | <<locked>> | 80% | 40,698 psi | 65% | 2257 fps | 99.8% |
| Lovex S065 | <<locked>> | 80% | 33,504 psi | 54% | 2123 fps | 95% |
| Lovex S070 | <<locked>> | 86% | 38,232 psi | 61% | 2241 fps | 95.4% |
| Norma 201 | <<locked>> | 80% | 44,715 psi | 72% | 2310 fps | 100% |
| Norma 202 | <<locked>> | 80% | 45,092 psi | 72% | 2316 fps | 100% |
| Norma 203B | <<locked>> | 80% | 40,698 psi | 65% | 2293 fps | 99.3% |
| Norma 204 | <<locked>> | 94% | 47,007 psi | 75% | 2428 fps | 95.4% |
| Norma MRP | <<locked>> | 98% | 41,307 psi | 66% | 2425 fps | 95.8% |
| Norma URP | <<locked>> | 80% | 29,921 psi | 48% | 2116 fps | 95.1% |
| Ramshot Big Game | <<locked>> | 80% | 40,248 psi | 65% | 2310 fps | 99.2% |
| Ramshot Hunter | <<locked>> | 86% | 35,244 psi | 57% | 2241 fps | 95.1% |
| Ramshot TAC | <<locked>> | 80% | 47,413 psi | 76% | 2369 fps | 98.7% |
| Ramshot Wild Boar | <<locked>> | 80% | 46,978 psi | 75% | 2385 fps | 99.9% |
| Ramshot X-Terminator | <<locked>> | 80% | 51,329 psi | 82% | 2402 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,948 psi | 43% | 1358 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 39,305 psi | 63% | 2241 fps | 96.1% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 43,482 psi | 70% | 2395 fps | 99.4% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 35,418 psi | 57% | 2287 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 31,096 psi | 50% | 2172 fps | 95.3% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 33,475 psi | 54% | 2228 fps | 95.3% |
| Rottweil R 901 | <<locked>> | 80% | 48,820 psi | 78% | 2339 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 42,641 psi | 68% | 2270 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 80% | 36,071 psi | 58% | 2208 fps | 99% |
| Rottweil R 905 | <<locked>> | 98% | 43,932 psi | 70% | 2402 fps | 95.1% |
| Rottweil R 907 | <<locked>> | 86% | 41,669 psi | 67% | 2277 fps | 95.4% |
| Shooters World Long Rifle | <<locked>> | 80% | 33,504 psi | 54% | 2123 fps | 95% |
| Shooters World Match Rifle | <<locked>> | 80% | 44,817 psi | 72% | 2336 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 40,698 psi | 65% | 2257 fps | 99.8% |
| Shooters World SW4350 | <<locked>> | 86% | 38,232 psi | 61% | 2241 fps | 95.4% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 36,782 psi | 59% | 2247 fps | 98.6% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 45,992 psi | 74% | 2352 fps | 98.9% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 43,990 psi | 71% | 2329 fps | 99.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 46,137 psi | 74% | 2264 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 38,479 psi | 62% | 2152 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 39,610 psi | 64% | 2211 fps | 95.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 43,540 psi | 70% | 2398 fps | 95% |
| Somchem S321 | <<locked>> | 80% | 51,474 psi | 83% | 2428 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 45,643 psi | 73% | 2264 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 45,513 psi | 73% | 2343 fps | 99.7% |
| Somchem S355 | <<locked>> | 80% | 36,782 psi | 59% | 2211 fps | 99% |
| Somchem S365 | <<locked>> | 80% | 26,716 psi | 43% | 2070 fps | 97.3% |
| Somchem S385 | <<locked>> | 96% | 41,626 psi | 67% | 2339 fps | 95.5% |
| Vihtavuori N130 | <<locked>> | 80% | 51,996 psi | 83% | 2306 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 46,514 psi | 75% | 2254 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 42,264 psi | 68% | 2251 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 42,801 psi | 69% | 2260 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 35,085 psi | 56% | 2156 fps | 99.5% |
| Vihtavuori N160 | <<locked>> | 80% | 31,125 psi | 50% | 2113 fps | 95.5% |
| Vihtavuori N530 | <<locked>> | 80% | 47,703 psi | 76% | 2352 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 41,089 psi | 66% | 2254 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 30,618 psi | 49% | 2116 fps | 95.1% |
| Vihtavuori N555 | <<locked>> | 86% | 27,673 psi | 44% | 2110 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 30,864 psi | 49% | 2093 fps | 97.6% |
| Winchester 748 | <<locked>> | 80% | 47,674 psi | 76% | 2398 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 38,725 psi | 62% | 2303 fps | 95.4% |
| Winchester StaBALL HD | <<locked>> | 92% | 27,470 psi | 44% | 2162 fps | 96.3% |
| Winchester StaBALL Match | <<locked>> | 80% | 43,497 psi | 70% | 2333 fps | 99.8% |
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 Elite Hunter. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,621 fps; across all powders the maximum-charge window runs from 1,486 fps to 2,621 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, Hodgdon Superformance, Alliant Reloder-17 rank at the top here: for .338 Win Mag. with the .338 | 250gr | Berger Elite 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.