Load Specifications
Load data in caliber .338 Win Mag. with .338 | 250gr | RWS Speed Tip Professional 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, 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% | 55,593 psi | 89% | 2382 fps | 100% |
| Accurate 2495 | <<locked>> | 88% | 54,157 psi | 87% | 2408 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 55,782 psi | 89% | 2467 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 53,272 psi | 85% | 2418 fps | 97.6% |
| Accurate 3100ᴾ | <<locked>> | 100% | 40,930 psi | 66% | 2333 fps | 97% |
| Accurate 4064 | <<locked>> | 90% | 54,128 psi | 87% | 2454 fps | 100% |
| Accurate 4350 | <<locked>> | 98% | 53,461 psi | 86% | 2533 fps | 99.9% |
| ADI AR 2206H | <<locked>> | 86% | 54,462 psi | 87% | 2480 fps | 100% |
| ADI AR 2208 | <<locked>> | 92% | 55,477 psi | 89% | 2484 fps | 100% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 49,037 psi | 79% | 2467 fps | 95.9% |
| ADI Benchmark 8208 | <<locked>> | 84% | 53,635 psi | 86% | 2438 fps | 100% |
| Alliant AR-Comp | <<locked>> | 84% | 54,621 psi | 88% | 2408 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 88% | 54,027 psi | 87% | 2592 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 55,666 psi | 89% | 2503 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 90% | 56,014 psi | 90% | 2520 fps | 100% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 54,984 psi | 88% | 2585 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 96% | 56,072 psi | 90% | 2615 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 47,819 psi | 77% | 2457 fps | 95.8% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 39,218 psi | 63% | 2359 fps | 99.5% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 43,700 psi | 70% | 2507 fps | 99% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 54,128 psi | 87% | 2500 fps | 99.9% |
| Bofors RP3 | <<locked>> | 92% | 56,057 psi | 90% | 2516 fps | 100% |
| Bofors RP7 | <<locked>> | 96% | 56,188 psi | 90% | 2497 fps | 98.3% |
| Hodgdon Benchmark | <<locked>> | 84% | 55,347 psi | 89% | 2418 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 84% | 52,721 psi | 85% | 2464 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 82% | 54,824 psi | 88% | 2556 fps | 100% |
| Hodgdon H380 | <<locked>> | 90% | 53,635 psi | 86% | 2487 fps | 99.7% |
| Hodgdon H414 | <<locked>> | 98% | 56,391 psi | 90% | 2582 fps | 98.9% |
| Hodgdon H4350 | <<locked>> | 94% | 53,824 psi | 86% | 2500 fps | 97.4% |
| Hodgdon H4895 | <<locked>> | 86% | 54,998 psi | 88% | 2490 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 51,285 psi | 82% | 2474 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 88% | 54,288 psi | 87% | 2520 fps | 100% |
| Hodgdon Superformance | <<locked>> | 96% | 53,258 psi | 85% | 2566 fps | 98.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,723 psi | 57% | 1483 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 56,260 psi | 90% | 2490 fps | 100% |
| IMR 3031 | <<locked>> | 86% | 55,129 psi | 88% | 2467 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 55,085 psi | 88% | 2467 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 88% | 54,926 psi | 88% | 2451 fps | 98.6% |
| IMR 4350ᴾ | <<locked>> | 100% | 56,405 psi | 90% | 2520 fps | 98.4% |
| IMR 4451 Enduron | <<locked>> | 94% | 54,534 psi | 87% | 2477 fps | 98.5% |
| IMR 4831ᴾ | <<locked>> | 100% | 54,143 psi | 87% | 2526 fps | 99.9% |
| IMR 4895 | <<locked>> | 88% | 54,070 psi | 87% | 2503 fps | 100% |
| IMR 8208 XBR | <<locked>> | 84% | 53,635 psi | 86% | 2438 fps | 100% |
| Lovex D073.6 | <<locked>> | 86% | 54,317 psi | 87% | 2461 fps | 100% |
| Lovex S060 | <<locked>> | 86% | 54,215 psi | 87% | 2418 fps | 100% |
| Lovex S062 | <<locked>> | 90% | 54,839 psi | 88% | 2464 fps | 100% |
| Lovex S065 | <<locked>> | 96% | 53,983 psi | 87% | 2470 fps | 99.3% |
| Lovex S070 | <<locked>> | 98% | 54,897 psi | 88% | 2503 fps | 98.8% |
| Norma 201 | <<locked>> | 86% | 53,461 psi | 86% | 2434 fps | 100% |
| Norma 202 | <<locked>> | 86% | 53,954 psi | 87% | 2434 fps | 100% |
| Norma 203B | <<locked>> | 90% | 55,172 psi | 88% | 2510 fps | 100% |
| Norma 204 | <<locked>> | 98% | 53,229 psi | 85% | 2516 fps | 96.8% |
| Norma MRPᴾ | <<locked>> | 100% | 43,743 psi | 70% | 2467 fps | 96.5% |
| Norma URPᴾ | <<locked>> | 100% | 56,159 psi | 90% | 2569 fps | 100% |
| Ramshot Big Game | <<locked>> | 90% | 55,767 psi | 89% | 2536 fps | 100% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 54,868 psi | 88% | 2569 fps | 99.3% |
| Ramshot TAC | <<locked>> | 84% | 53,679 psi | 86% | 2457 fps | 99.4% |
| Ramshot Wild Boar | <<locked>> | 84% | 53,345 psi | 86% | 2474 fps | 100% |
| Ramshot X-Terminator | <<locked>> | 82% | 54,360 psi | 87% | 2441 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,216 psi | 58% | 1519 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 56,347 psi | 90% | 2457 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 53,824 psi | 86% | 2470 fps | 98.9% |
| ReloadSwiss RS 52 | <<locked>> | 86% | 53,026 psi | 85% | 2536 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 55,927 psi | 90% | 2612 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 53,200 psi | 85% | 2559 fps | 99.8% |
| ReloadSwiss RS 70 | <<locked>> | 98% | 52,692 psi | 84% | 2582 fps | 99.7% |
| Rottweil R 901 | <<locked>> | 84% | 54,578 psi | 88% | 2411 fps | 100% |
| Rottweil R 902 | <<locked>> | 88% | 53,867 psi | 86% | 2431 fps | 100% |
| Rottweil R 903 | <<locked>> | 94% | 55,941 psi | 90% | 2510 fps | 100% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 46,325 psi | 74% | 2438 fps | 95.7% |
| Rottweil R 907 | <<locked>> | 96% | 56,188 psi | 90% | 2497 fps | 98.3% |
| Shooters World Long Rifle | <<locked>> | 96% | 53,983 psi | 87% | 2470 fps | 99.3% |
| Shooters World Match Rifle | <<locked>> | 86% | 54,317 psi | 87% | 2461 fps | 100% |
| Shooters World Precision | <<locked>> | 90% | 54,839 psi | 88% | 2464 fps | 100% |
| Shooters World SW4350 | <<locked>> | 98% | 54,897 psi | 88% | 2503 fps | 98.8% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 54,157 psi | 87% | 2523 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 55,898 psi | 90% | 2487 fps | 99.8% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 52,968 psi | 85% | 2461 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 54,882 psi | 88% | 2372 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 55,114 psi | 88% | 2375 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 54,157 psi | 87% | 2431 fps | 98.4% |
| Somchem S321 | <<locked>> | 82% | 54,563 psi | 87% | 2464 fps | 100% |
| Somchem S335 | <<locked>> | 86% | 54,317 psi | 87% | 2375 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 55,216 psi | 89% | 2474 fps | 100% |
| Somchem S355 | <<locked>> | 94% | 56,318 psi | 90% | 2507 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 50,691 psi | 81% | 2526 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 47,108 psi | 76% | 2428 fps | 96.8% |
| Vihtavuori N130 | <<locked>> | 82% | 54,839 psi | 88% | 2339 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 55,143 psi | 88% | 2359 fps | 100% |
| Vihtavuori N135 | <<locked>> | 88% | 53,650 psi | 86% | 2395 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 54,375 psi | 87% | 2415 fps | 100% |
| Vihtavuori N150 | <<locked>> | 94% | 54,172 psi | 87% | 2444 fps | 100% |
| Vihtavuori N160 | <<locked>> | 98% | 55,158 psi | 88% | 2516 fps | 99.9% |
| Vihtavuori N530 | <<locked>> | 84% | 54,128 psi | 87% | 2438 fps | 100% |
| Vihtavuori N540 | <<locked>> | 90% | 55,956 psi | 90% | 2457 fps | 100% |
| Vihtavuori N550 | <<locked>> | 98% | 54,259 psi | 87% | 2526 fps | 99.8% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 43,076 psi | 69% | 2428 fps | 99.4% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 55,390 psi | 89% | 2500 fps | 100% |
| Winchester 748 | <<locked>> | 84% | 53,766 psi | 86% | 2477 fps | 100% |
| Winchester 760 | <<locked>> | 96% | 53,026 psi | 85% | 2536 fps | 98.5% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 35,027 psi | 56% | 2372 fps | 99.5% |
| Winchester StaBALL Match | <<locked>> | 88% | 56,333 psi | 90% | 2510 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% | 49,153 psi | 79% | 2303 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 41,872 psi | 67% | 2247 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 48,820 psi | 78% | 2382 fps | 100% |
| Accurate 2700 | <<locked>> | 82% | 43,932 psi | 70% | 2277 fps | 95.7% |
| Accurate 3100 | <<locked>> | 96% | 35,737 psi | 57% | 2238 fps | 95.5% |
| Accurate 4064 | <<locked>> | 80% | 39,624 psi | 64% | 2247 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 30,995 psi | 50% | 2149 fps | 95.7% |
| ADI AR 2206H | <<locked>> | 80% | 45,310 psi | 73% | 2346 fps | 99.7% |
| ADI AR 2208 | <<locked>> | 80% | 38,508 psi | 62% | 2218 fps | 98.4% |
| ADI AR 2209 | <<locked>> | 98% | 45,890 psi | 74% | 2418 fps | 95% |
| ADI Benchmark 8208 | <<locked>> | 80% | 47,398 psi | 76% | 2349 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 47,964 psi | 77% | 2329 fps | 100% |
| Alliant Power Pro 2000-MR | 53.3 gr | 80% | 41,278 psi | 66% | 2385 fps | 99% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 38,276 psi | 61% | 2241 fps | 99.4% |
| Alliant Reloder-15 | <<locked>> | 80% | 41,031 psi | 66% | 2297 fps | 99% |
| Alliant Reloder-16 | <<locked>> | 80% | 29,776 psi | 48% | 2113 fps | 95% |
| Alliant Reloder-17 | 52.4 gr | 80% | 32,866 psi | 53% | 2221 fps | 98.2% |
| Alliant Reloder-19 | <<locked>> | 98% | 44,831 psi | 72% | 2408 fps | 95% |
| Alliant Reloder-23 | <<locked>> | 88% | 27,325 psi | 44% | 2083 fps | 95.6% |
| Alliant Reloder-26 | <<locked>> | 92% | 33,156 psi | 53% | 2283 fps | 95.7% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 44,425 psi | 71% | 2356 fps | 99.2% |
| Bofors RP3 | <<locked>> | 80% | 37,811 psi | 61% | 2244 fps | 99.4% |
| Bofors RP7 | <<locked>> | 86% | 41,394 psi | 66% | 2267 fps | 95.3% |
| Hodgdon Benchmark | <<locked>> | 80% | 49,023 psi | 79% | 2336 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 46,311 psi | 74% | 2375 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 80% | 51,024 psi | 82% | 2503 fps | 99.9% |
| Hodgdon H380 | <<locked>> | 80% | 38,696 psi | 62% | 2247 fps | 97.5% |
| Hodgdon H414 | <<locked>> | 86% | 38,072 psi | 61% | 2287 fps | 95.1% |
| Hodgdon H4350 | <<locked>> | 88% | 44,541 psi | 71% | 2359 fps | 95.4% |
| Hodgdon H4895 | <<locked>> | 80% | 45,745 psi | 73% | 2356 fps | 99.9% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 27,296 psi | 44% | 2031 fps | 95.9% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 41,669 psi | 67% | 2336 fps | 99.8% |
| Hodgdon Superformance | 61 gr | 88% | 40,335 psi | 65% | 2349 fps | 95% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,469 psi | 42% | 1322 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 43,787 psi | 70% | 2313 fps | 99.8% |
| IMR 3031 | <<locked>> | 80% | 45,513 psi | 73% | 2343 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 40,422 psi | 65% | 2244 fps | 98.9% |
| IMR 4166 Enduron | <<locked>> | 80% | 42,960 psi | 69% | 2267 fps | 96.3% |
| IMR 4350 | <<locked>> | 90% | 41,263 psi | 66% | 2290 fps | 95.3% |
| IMR 4451 Enduron | <<locked>> | 84% | 40,437 psi | 65% | 2251 fps | 95.5% |
| IMR 4831 | <<locked>> | 82% | 30,255 psi | 49% | 2113 fps | 95.5% |
| IMR 4895 | <<locked>> | 80% | 42,018 psi | 67% | 2320 fps | 99.5% |
| IMR 8208 XBR | <<locked>> | 80% | 47,398 psi | 76% | 2349 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 44,469 psi | 71% | 2326 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 45,179 psi | 72% | 2287 fps | 99.7% |
| Lovex S062 | <<locked>> | 80% | 40,364 psi | 65% | 2251 fps | 99.8% |
| Lovex S065 | <<locked>> | 82% | 35,302 psi | 57% | 2159 fps | 95.6% |
| Lovex S070 | <<locked>> | 86% | 37,956 psi | 61% | 2231 fps | 95.2% |
| Norma 201 | <<locked>> | 80% | 44,367 psi | 71% | 2303 fps | 100% |
| Norma 202 | <<locked>> | 80% | 44,759 psi | 72% | 2306 fps | 100% |
| Norma 203B | <<locked>> | 80% | 40,393 psi | 65% | 2283 fps | 99.3% |
| Norma 204 | <<locked>> | 94% | 46,833 psi | 75% | 2418 fps | 95.3% |
| Norma MRP | <<locked>> | 98% | 40,973 psi | 66% | 2415 fps | 95.6% |
| Norma URP | <<locked>> | 82% | 31,575 psi | 51% | 2152 fps | 95.7% |
| Ramshot Big Game | <<locked>> | 80% | 39,943 psi | 64% | 2300 fps | 99.1% |
| Ramshot Hunter | <<locked>> | 88% | 37,347 psi | 60% | 2283 fps | 95.8% |
| Ramshot TAC | <<locked>> | 80% | 47,166 psi | 76% | 2362 fps | 98.6% |
| Ramshot Wild Boar | <<locked>> | 80% | 46,731 psi | 75% | 2379 fps | 99.8% |
| Ramshot X-Terminator | <<locked>> | 80% | 51,068 psi | 82% | 2395 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,992 psi | 43% | 1355 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 53,098 psi | 85% | 2418 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 39,030 psi | 63% | 2234 fps | 96% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 43,149 psi | 69% | 2385 fps | 99.3% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 34,983 psi | 56% | 2277 fps | 99.9% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 30,850 psi | 49% | 2162 fps | 95.1% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 33,098 psi | 53% | 2215 fps | 95% |
| Rottweil R 901 | <<locked>> | 80% | 48,472 psi | 78% | 2333 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 42,293 psi | 68% | 2264 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 80% | 35,752 psi | 57% | 2198 fps | 98.9% |
| Rottweil R 905 | <<locked>> | 98% | 43,569 psi | 70% | 2392 fps | 95% |
| Rottweil R 907 | <<locked>> | 86% | 41,394 psi | 66% | 2267 fps | 95.3% |
| Shooters World Long Rifle | <<locked>> | 82% | 35,302 psi | 57% | 2159 fps | 95.6% |
| Shooters World Match Rifle | <<locked>> | 80% | 44,469 psi | 71% | 2326 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 40,364 psi | 65% | 2251 fps | 99.8% |
| Shooters World SW4350 | <<locked>> | 86% | 37,956 psi | 61% | 2231 fps | 95.2% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 36,521 psi | 59% | 2241 fps | 98.5% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 45,469 psi | 73% | 2339 fps | 98.8% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 43,685 psi | 70% | 2320 fps | 99.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 45,832 psi | 73% | 2254 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 38,159 psi | 61% | 2142 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 39,349 psi | 63% | 2201 fps | 95.4% |
| Somchem S321 | <<locked>> | 80% | 51,155 psi | 82% | 2421 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 45,324 psi | 73% | 2257 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 45,237 psi | 73% | 2336 fps | 99.7% |
| Somchem S355 | <<locked>> | 80% | 36,463 psi | 58% | 2201 fps | 98.9% |
| Somchem S365 | <<locked>> | 80% | 26,484 psi | 42% | 2064 fps | 97.1% |
| Somchem S385 | <<locked>> | 96% | 41,220 psi | 66% | 2329 fps | 95.3% |
| Vihtavuori N130 | <<locked>> | 80% | 51,634 psi | 83% | 2300 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 46,166 psi | 74% | 2247 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 41,916 psi | 67% | 2241 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 42,482 psi | 68% | 2254 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 34,795 psi | 56% | 2149 fps | 99.4% |
| Vihtavuori N160 | <<locked>> | 80% | 30,864 psi | 49% | 2106 fps | 95.3% |
| Vihtavuori N530 | <<locked>> | 80% | 47,384 psi | 76% | 2346 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 40,756 psi | 65% | 2247 fps | 100% |
| Vihtavuori N550 | <<locked>> | 82% | 32,416 psi | 52% | 2156 fps | 95.7% |
| Vihtavuori N555 | <<locked>> | 88% | 29,196 psi | 47% | 2149 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 30,661 psi | 49% | 2087 fps | 97.5% |
| Winchester 748 | <<locked>> | 80% | 47,094 psi | 76% | 2388 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 38,247 psi | 61% | 2290 fps | 95.1% |
| Winchester StaBALL HD | <<locked>> | 92% | 27,311 psi | 44% | 2152 fps | 96.1% |
| Winchester StaBALL Match | <<locked>> | 80% | 43,221 psi | 69% | 2326 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 120 powders for .338 Win Mag. loaded with the .338 | 250gr | RWS Speed Tip Professional. Alliant Reloder-17 delivers the highest muzzle velocity at 2,615 fps; across all powders the maximum-charge window runs from 1,483 fps to 2,615 fps. Accurate 3100 gives the best case fill at 100 %, and 120 of the 120 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 250.0 gr projectile in 0.338" calls for a 1:12.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2209, ADI AR 2213 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 | RWS Speed Tip Professional they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AR 2213, Alliant Reloder-22, Bofors RP15 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.