Load Specifications
Bullet:.338 | 250gr | Target Virtus
Bullet Manufacturer:Virtus
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:1:11.0
Load data in caliber .338 Win Mag. with .338 | 250gr | Target Virtus bullet and 101 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-17, ReloadSwiss RS 60 and Alliant Power Pro 2000-MR.
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% | 53,403 psi | 86% | 2359 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 54,955 psi | 88% | 2425 fps | 100% |
| Accurate 2495 | <<locked>> | 90% | 54,679 psi | 88% | 2418 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 53,330 psi | 86% | 2438 fps | 100% |
| Accurate 2700 | <<locked>> | 90% | 54,650 psi | 88% | 2434 fps | 97.8% |
| Accurate 3100ᴾ | <<locked>> | 100% | 38,508 psi | 62% | 2293 fps | 96.3% |
| Accurate 4064 | <<locked>> | 92% | 54,636 psi | 88% | 2461 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 54,679 psi | 88% | 2549 fps | 99.9% |
| ADI AR 2206H | <<locked>> | 88% | 55,912 psi | 90% | 2500 fps | 100% |
| ADI AR 2208 | <<locked>> | 92% | 53,563 psi | 86% | 2457 fps | 99.9% |
| ADI Benchmark 8208 | <<locked>> | 86% | 55,158 psi | 88% | 2454 fps | 100% |
| Alliant AR-Comp | <<locked>> | 86% | 55,985 psi | 90% | 2425 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 90% | 55,535 psi | 89% | 2608 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 53,185 psi | 85% | 2474 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 90% | 53,824 psi | 86% | 2493 fps | 100% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 52,866 psi | 85% | 2556 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 96% | 53,853 psi | 86% | 2585 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 37,246 psi | 60% | 2323 fps | 99.1% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 41,423 psi | 66% | 2464 fps | 98.4% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 55,767 psi | 89% | 2516 fps | 100% |
| Bofors RP3 | <<locked>> | 92% | 53,708 psi | 86% | 2487 fps | 100% |
| Bofors RP7 | <<locked>> | 96% | 53,940 psi | 86% | 2464 fps | 97.9% |
| Hodgdon Benchmark | <<locked>> | 84% | 53,621 psi | 86% | 2395 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 86% | 54,085 psi | 87% | 2480 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 84% | 56,405 psi | 90% | 2575 fps | 100% |
| Hodgdon H322 | <<locked>> | 82% | 55,883 psi | 90% | 2441 fps | 100% |
| Hodgdon H380 | <<locked>> | 92% | 54,839 psi | 88% | 2500 fps | 99.7% |
| Hodgdon H414 | <<locked>> | 98% | 54,085 psi | 87% | 2549 fps | 98.6% |
| Hodgdon H4350 | <<locked>> | 96% | 55,027 psi | 88% | 2513 fps | 97.5% |
| Hodgdon H4895 | <<locked>> | 86% | 53,113 psi | 85% | 2464 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 48,965 psi | 79% | 2441 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 55,854 psi | 90% | 2539 fps | 100% |
| Hodgdon Superformance | <<locked>> | 98% | 54,998 psi | 88% | 2589 fps | 98.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,375 psi | 57% | 1476 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 54,302 psi | 87% | 2464 fps | 100% |
| IMR 3031 | <<locked>> | 86% | 52,982 psi | 85% | 2444 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 53,069 psi | 85% | 2441 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 88% | 53,098 psi | 85% | 2421 fps | 98.2% |
| IMR 4350ᴾ | <<locked>> | 100% | 54,085 psi | 87% | 2487 fps | 98% |
| IMR 4451 Enduron | <<locked>> | 96% | 56,072 psi | 90% | 2493 fps | 98.6% |
| IMR 4831ᴾ | <<locked>> | 100% | 51,750 psi | 83% | 2497 fps | 99.8% |
| IMR 4895 | <<locked>> | 90% | 55,201 psi | 89% | 2520 fps | 100% |
| IMR 8208 XBR | <<locked>> | 86% | 55,158 psi | 88% | 2454 fps | 100% |
| Lovex D073.5 | <<locked>> | 82% | 54,998 psi | 88% | 2438 fps | 100% |
| Lovex D073.6 | <<locked>> | 88% | 55,317 psi | 89% | 2474 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 55,564 psi | 89% | 2431 fps | 100% |
| Lovex S062 | <<locked>> | 92% | 55,970 psi | 90% | 2474 fps | 100% |
| Lovex S065 | <<locked>> | 98% | 54,969 psi | 88% | 2484 fps | 99.4% |
| Lovex S070ᴾ | <<locked>> | 100% | 55,941 psi | 90% | 2516 fps | 98.8% |
| Norma 201 | <<locked>> | 88% | 54,433 psi | 87% | 2444 fps | 100% |
| Norma 202 | <<locked>> | 88% | 55,085 psi | 88% | 2448 fps | 100% |
| Norma 203B | <<locked>> | 90% | 52,997 psi | 85% | 2480 fps | 100% |
| Norma 204ᴾ | <<locked>> | 100% | 54,911 psi | 88% | 2536 fps | 96.9% |
| Norma URPᴾ | <<locked>> | 100% | 53,809 psi | 86% | 2536 fps | 99.8% |
| Ramshot Big Game | <<locked>> | 90% | 53,476 psi | 86% | 2507 fps | 100% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 52,721 psi | 85% | 2539 fps | 99% |
| Ramshot TAC | <<locked>> | 86% | 55,274 psi | 89% | 2477 fps | 99.5% |
| Ramshot Wild Boar | <<locked>> | 86% | 54,853 psi | 88% | 2490 fps | 100% |
| Ramshot X-Terminator | <<locked>> | 84% | 55,898 psi | 90% | 2457 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,795 psi | 57% | 1509 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 54,520 psi | 87% | 2434 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 55,143 psi | 88% | 2487 fps | 99% |
| ReloadSwiss RS 52 | <<locked>> | 88% | 54,447 psi | 87% | 2552 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 53,650 psi | 86% | 2582 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 54,259 psi | 87% | 2572 fps | 99.8% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 54,331 psi | 87% | 2598 fps | 99.8% |
| Rottweil R 901 | <<locked>> | 86% | 55,274 psi | 89% | 2421 fps | 100% |
| Rottweil R 902 | <<locked>> | 90% | 54,839 psi | 88% | 2444 fps | 100% |
| Rottweil R 903 | <<locked>> | 94% | 53,592 psi | 86% | 2480 fps | 100% |
| Rottweil R 907 | <<locked>> | 96% | 53,940 psi | 86% | 2464 fps | 97.9% |
| Shooters World Long Rifle | <<locked>> | 98% | 54,969 psi | 88% | 2484 fps | 99.4% |
| Shooters World Match Rifle | <<locked>> | 88% | 55,317 psi | 89% | 2474 fps | 100% |
| Shooters World Precision | <<locked>> | 92% | 55,970 psi | 90% | 2474 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 55,941 psi | 90% | 2516 fps | 98.8% |
| SNPE Vectan SP 11 | <<locked>> | 94% | 55,506 psi | 89% | 2539 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 53,490 psi | 86% | 2457 fps | 99.6% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 54,447 psi | 87% | 2477 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 53,011 psi | 85% | 2349 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 56,289 psi | 90% | 2388 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 55,709 psi | 89% | 2448 fps | 98.5% |
| Somchem S321 | <<locked>> | 84% | 56,275 psi | 90% | 2487 fps | 100% |
| Somchem S335 | <<locked>> | 88% | 55,419 psi | 89% | 2388 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 53,214 psi | 85% | 2448 fps | 100% |
| Somchem S355 | <<locked>> | 94% | 53,853 psi | 86% | 2477 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 48,051 psi | 77% | 2493 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 44,657 psi | 72% | 2388 fps | 96.1% |
| Vihtavuori N130 | <<locked>> | 84% | 56,028 psi | 90% | 2352 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 53,316 psi | 85% | 2336 fps | 100% |
| Vihtavuori N135 | <<locked>> | 90% | 54,665 psi | 88% | 2408 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 55,651 psi | 89% | 2428 fps | 100% |
| Vihtavuori N150 | <<locked>> | 96% | 55,535 psi | 89% | 2457 fps | 100% |
| Vihtavuori N160 | <<locked>> | 98% | 52,837 psi | 85% | 2487 fps | 99.7% |
| Vihtavuori N530 | <<locked>> | 86% | 55,405 psi | 89% | 2451 fps | 100% |
| Vihtavuori N540 | <<locked>> | 90% | 53,664 psi | 86% | 2428 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 55,361 psi | 89% | 2539 fps | 99.8% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 40,611 psi | 65% | 2388 fps | 99% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 53,243 psi | 85% | 2470 fps | 100% |
| Winchester 748 | <<locked>> | 86% | 55,259 psi | 89% | 2497 fps | 100% |
| Winchester 760 | <<locked>> | 98% | 54,389 psi | 87% | 2552 fps | 98.6% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 33,199 psi | 53% | 2326 fps | 99% |
| Winchester StaBALL Match | <<locked>> | 88% | 53,998 psi | 87% | 2480 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% | 47,239 psi | 76% | 2280 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 51,372 psi | 82% | 2382 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 39,247 psi | 63% | 2215 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 46,702 psi | 75% | 2352 fps | 100% |
| Accurate 2700 | <<locked>> | 82% | 42,032 psi | 67% | 2244 fps | 95% |
| Accurate 3100 | <<locked>> | 98% | 35,752 psi | 57% | 2241 fps | 95.4% |
| Accurate 4064 | <<locked>> | 80% | 37,173 psi | 60% | 2211 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 31,009 psi | 50% | 2152 fps | 95.7% |
| ADI AR 2206H | <<locked>> | 80% | 43,453 psi | 70% | 2316 fps | 99.5% |
| ADI AR 2208 | <<locked>> | 80% | 36,854 psi | 59% | 2188 fps | 97.9% |
| ADI Benchmark 8208 | <<locked>> | 80% | 45,556 psi | 73% | 2323 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 45,774 psi | 73% | 2303 fps | 100% |
| Alliant Power Pro 2000-MR | 52.3 gr | 80% | 39,392 psi | 63% | 2349 fps | 98.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 36,390 psi | 58% | 2208 fps | 99.1% |
| Alliant Reloder-15 | <<locked>> | 80% | 39,131 psi | 63% | 2264 fps | 98.6% |
| Alliant Reloder-16 | <<locked>> | 82% | 30,081 psi | 48% | 2123 fps | 95% |
| Alliant Reloder-17 | 51.5 gr | 80% | 31,270 psi | 50% | 2182 fps | 97.5% |
| Alliant Reloder-23 | <<locked>> | 90% | 27,325 psi | 44% | 2087 fps | 95.4% |
| Alliant Reloder-26 | <<locked>> | 94% | 33,489 psi | 54% | 2293 fps | 95.7% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 42,540 psi | 68% | 2323 fps | 98.8% |
| Bofors RP3 | <<locked>> | 80% | 35,723 psi | 57% | 2208 fps | 99.1% |
| Bofors RP7 | <<locked>> | 88% | 42,032 psi | 67% | 2280 fps | 95.3% |
| Hodgdon Benchmark | <<locked>> | 80% | 47,268 psi | 76% | 2310 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 44,135 psi | 71% | 2343 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 80% | 48,863 psi | 78% | 2470 fps | 99.8% |
| Hodgdon H322 | <<locked>> | 80% | 52,156 psi | 84% | 2398 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 36,825 psi | 59% | 2215 fps | 96.9% |
| Hodgdon H414 | <<locked>> | 88% | 38,769 psi | 62% | 2303 fps | 95.2% |
| Hodgdon H4350 | <<locked>> | 90% | 45,440 psi | 73% | 2372 fps | 95.5% |
| Hodgdon H4895 | <<locked>> | 80% | 43,830 psi | 70% | 2326 fps | 99.8% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 27,412 psi | 44% | 2037 fps | 95.9% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 39,798 psi | 64% | 2306 fps | 99.7% |
| Hodgdon Superformance | <<locked>> | 90% | 41,162 psi | 66% | 2365 fps | 95.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,165 psi | 42% | 1312 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 42,076 psi | 67% | 2283 fps | 99.6% |
| IMR 3031 | <<locked>> | 80% | 43,395 psi | 70% | 2316 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 38,667 psi | 62% | 2215 fps | 98.6% |
| IMR 4166 Enduron | <<locked>> | 80% | 41,336 psi | 66% | 2238 fps | 95.8% |
| IMR 4350 | <<locked>> | 92% | 42,032 psi | 67% | 2303 fps | 95.4% |
| IMR 4451 Enduron | <<locked>> | 86% | 41,162 psi | 66% | 2264 fps | 95.6% |
| IMR 4831 | <<locked>> | 84% | 30,385 psi | 49% | 2123 fps | 95.4% |
| IMR 4895 | <<locked>> | 80% | 40,089 psi | 64% | 2290 fps | 99.2% |
| IMR 8208 XBR | <<locked>> | 80% | 45,556 psi | 73% | 2323 fps | 100% |
| Lovex D073.5 | <<locked>> | 80% | 51,401 psi | 82% | 2395 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 42,293 psi | 68% | 2297 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 43,772 psi | 70% | 2264 fps | 99.6% |
| Lovex S062 | <<locked>> | 80% | 38,624 psi | 62% | 2221 fps | 99.6% |
| Lovex S065 | <<locked>> | 84% | 35,694 psi | 57% | 2169 fps | 95.6% |
| Lovex S070 | <<locked>> | 88% | 38,319 psi | 61% | 2241 fps | 95.2% |
| Norma 201 | <<locked>> | 80% | 42,351 psi | 68% | 2274 fps | 99.9% |
| Norma 202 | <<locked>> | 80% | 42,815 psi | 69% | 2280 fps | 100% |
| Norma 203B | <<locked>> | 80% | 38,522 psi | 62% | 2254 fps | 98.9% |
| Norma 204 | <<locked>> | 96% | 47,747 psi | 77% | 2431 fps | 95.4% |
| Norma URP | <<locked>> | 84% | 31,850 psi | 51% | 2162 fps | 95.7% |
| Ramshot Big Game | <<locked>> | 80% | 38,029 psi | 61% | 2267 fps | 98.7% |
| Ramshot Hunter | <<locked>> | 88% | 35,578 psi | 57% | 2244 fps | 95% |
| Ramshot TAC | <<locked>> | 80% | 45,281 psi | 73% | 2329 fps | 98.2% |
| Ramshot Wild Boar | <<locked>> | 80% | 44,962 psi | 72% | 2352 fps | 99.7% |
| Ramshot X-Terminator | <<locked>> | 80% | 49,110 psi | 79% | 2365 fps | 99.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,614 psi | 43% | 1348 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 51,256 psi | 82% | 2392 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 37,333 psi | 60% | 2201 fps | 95.3% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 41,118 psi | 66% | 2356 fps | 99% |
| ReloadSwiss RS 60 | 51.5 gr | 80% | 33,359 psi | 53% | 2241 fps | 99.8% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 31,067 psi | 50% | 2172 fps | 95.1% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 33,634 psi | 54% | 2228 fps | 95.1% |
| Rottweil R 901 | <<locked>> | 80% | 46,151 psi | 74% | 2300 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 40,263 psi | 65% | 2231 fps | 99.7% |
| Rottweil R 903 | <<locked>> | 80% | 33,707 psi | 54% | 2162 fps | 98.5% |
| Rottweil R 907 | <<locked>> | 88% | 42,032 psi | 67% | 2280 fps | 95.3% |
| Shooters World Long Rifle | <<locked>> | 84% | 35,694 psi | 57% | 2169 fps | 95.6% |
| Shooters World Match Rifle | <<locked>> | 80% | 42,293 psi | 68% | 2297 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 38,624 psi | 62% | 2221 fps | 99.6% |
| Shooters World SW4350 | <<locked>> | 88% | 38,319 psi | 61% | 2241 fps | 95.2% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 34,780 psi | 56% | 2208 fps | 98% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 43,555 psi | 70% | 2310 fps | 98.4% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 41,959 psi | 67% | 2293 fps | 99.4% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 43,918 psi | 70% | 2228 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 36,434 psi | 58% | 2116 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 39,871 psi | 64% | 2215 fps | 95.4% |
| Somchem S321 | <<locked>> | 80% | 49,066 psi | 79% | 2392 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 43,424 psi | 70% | 2231 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 43,294 psi | 69% | 2306 fps | 99.5% |
| Somchem S355 | <<locked>> | 80% | 34,548 psi | 55% | 2165 fps | 98.4% |
| Somchem S365 | <<locked>> | 80% | 24,860 psi | 40% | 2018 fps | 96.1% |
| Somchem S385 | <<locked>> | 98% | 41,887 psi | 67% | 2343 fps | 95.4% |
| Vihtavuori N130 | <<locked>> | 80% | 49,705 psi | 80% | 2277 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 44,295 psi | 71% | 2221 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 39,784 psi | 64% | 2211 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 40,611 psi | 65% | 2224 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 32,953 psi | 53% | 2113 fps | 99.1% |
| Vihtavuori N160 | <<locked>> | 82% | 31,183 psi | 50% | 2116 fps | 95.3% |
| Vihtavuori N530 | <<locked>> | 80% | 45,527 psi | 73% | 2320 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 38,972 psi | 62% | 2218 fps | 100% |
| Vihtavuori N550 | <<locked>> | 84% | 32,706 psi | 52% | 2165 fps | 95.8% |
| Vihtavuori N555 | <<locked>> | 90% | 29,022 psi | 47% | 2149 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 29,095 psi | 47% | 2051 fps | 96.7% |
| Winchester 748 | <<locked>> | 80% | 45,179 psi | 72% | 2359 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 38,957 psi | 62% | 2306 fps | 95.3% |
| Winchester StaBALL HD | <<locked>> | 94% | 27,340 psi | 44% | 2156 fps | 95.9% |
| Winchester StaBALL Match | <<locked>> | 80% | 41,408 psi | 66% | 2297 fps | 99.6% |
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 101 powders for .338 Win Mag. loaded with the .338 | 250gr | Target Virtus. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,608 fps; across all powders the maximum-charge window runs from 1,476 fps to 2,608 fps. Accurate 3100 gives the best case fill at 100 %, and 101 of the 101 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (430 MPa), the top charges use 53–90 %, leaving at least 10 % headroom. The 250.0 gr projectile in 0.338" calls for a 1:11.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate 4350, Alliant Reloder-16 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 Reloder-17, ReloadSwiss RS 60, Alliant Power Pro 2000-MR rank at the top here: for .338 Win Mag. with the .338 | 250gr | Target Virtus 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.