Load Specifications
Bullet Manufacturer:Barnes
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:1:14.5
Load data in caliber .338 Win Mag. with .338 | 250gr | Barnes Banded Solid bullet and 104 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 70, 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>> | 82% | 55,042 psi | 88% | 2398 fps | 100% |
| Accurate 2495 | <<locked>> | 86% | 54,143 psi | 87% | 2428 fps | 100% |
| Accurate 2520 | <<locked>> | 82% | 55,680 psi | 89% | 2487 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 56,188 psi | 90% | 2487 fps | 98.5% |
| Accurate 3100ᴾ | <<locked>> | 100% | 44,541 psi | 71% | 2415 fps | 98.2% |
| Accurate 4064 | <<locked>> | 88% | 54,244 psi | 87% | 2474 fps | 100% |
| Accurate 4350 | <<locked>> | 96% | 54,012 psi | 87% | 2562 fps | 100% |
| ADI AR 2206H | <<locked>> | 84% | 54,114 psi | 87% | 2500 fps | 100% |
| ADI AR 2208 | <<locked>> | 90% | 55,303 psi | 89% | 2507 fps | 100% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 52,083 psi | 84% | 2546 fps | 97.1% |
| ADI Benchmark 8208 | <<locked>> | 82% | 53,156 psi | 85% | 2454 fps | 100% |
| Alliant AR-Comp | <<locked>> | 82% | 54,288 psi | 87% | 2425 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 53,809 psi | 86% | 2615 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 90% | 55,303 psi | 89% | 2523 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 88% | 55,941 psi | 90% | 2546 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 98% | 54,926 psi | 88% | 2612 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 94% | 56,202 psi | 90% | 2641 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 51,126 psi | 82% | 2536 fps | 97.1% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 42,105 psi | 68% | 2438 fps | 99.9% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 37,144 psi | 60% | 2352 fps | 96.8% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 47,210 psi | 76% | 2592 fps | 99.7% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 53,925 psi | 86% | 2520 fps | 100% |
| Bofors RP3 | <<locked>> | 90% | 56,188 psi | 90% | 2539 fps | 100% |
| Bofors RP7 | <<locked>> | 94% | 55,825 psi | 90% | 2520 fps | 98.7% |
| Hodgdon Benchmark | <<locked>> | 82% | 54,752 psi | 88% | 2434 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 84% | 56,159 psi | 90% | 2530 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 53,432 psi | 86% | 2510 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 94% | 53,055 psi | 85% | 2562 fps | 98.9% |
| Hodgdon H4350 | <<locked>> | 92% | 53,621 psi | 86% | 2526 fps | 97.8% |
| Hodgdon H4895 | <<locked>> | 84% | 54,723 psi | 88% | 2507 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 54,984 psi | 88% | 2543 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 54,302 psi | 87% | 2543 fps | 100% |
| Hodgdon Superformance | <<locked>> | 94% | 53,272 psi | 85% | 2598 fps | 98.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,911 psi | 58% | 1512 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 55,941 psi | 90% | 2510 fps | 100% |
| IMR 3031 | <<locked>> | 84% | 54,926 psi | 88% | 2487 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 54,824 psi | 88% | 2490 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 86% | 54,375 psi | 87% | 2474 fps | 98.8% |
| IMR 4350 | <<locked>> | 98% | 56,275 psi | 90% | 2549 fps | 98.8% |
| IMR 4451 Enduron | <<locked>> | 92% | 54,302 psi | 87% | 2500 fps | 98.8% |
| IMR 4831 | <<locked>> | 98% | 54,433 psi | 87% | 2556 fps | 100% |
| IMR 4895 | <<locked>> | 86% | 53,998 psi | 87% | 2526 fps | 100% |
| IMR 8208 XBR | <<locked>> | 82% | 53,156 psi | 85% | 2454 fps | 100% |
| Lovex D073.6 | <<locked>> | 84% | 54,041 psi | 87% | 2477 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 53,548 psi | 86% | 2434 fps | 100% |
| Lovex S062 | <<locked>> | 88% | 54,679 psi | 88% | 2484 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 53,867 psi | 86% | 2497 fps | 99.5% |
| Lovex S070 | <<locked>> | 96% | 54,781 psi | 88% | 2530 fps | 99.1% |
| Lovex S071ᴾ | <<locked>> | 100% | 36,883 psi | 59% | 2280 fps | 96.3% |
| Norma 201 | <<locked>> | 86% | 56,333 psi | 90% | 2493 fps | 100% |
| Norma 202 | <<locked>> | 84% | 53,519 psi | 86% | 2448 fps | 100% |
| Norma 203B | <<locked>> | 88% | 55,143 psi | 88% | 2533 fps | 100% |
| Norma 204 | <<locked>> | 96% | 53,301 psi | 85% | 2546 fps | 97.3% |
| Norma MRPᴾ | <<locked>> | 100% | 47,195 psi | 76% | 2556 fps | 97.9% |
| Norma URP | <<locked>> | 96% | 52,968 psi | 85% | 2549 fps | 99.9% |
| Ramshot Big Game | <<locked>> | 88% | 55,680 psi | 89% | 2559 fps | 100% |
| Ramshot Hunter | <<locked>> | 98% | 55,288 psi | 89% | 2602 fps | 99.6% |
| Ramshot TAC | <<locked>> | 82% | 53,185 psi | 85% | 2477 fps | 99.6% |
| Ramshot Wild Boar | <<locked>> | 82% | 52,808 psi | 85% | 2490 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,405 psi | 58% | 1545 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 53,388 psi | 86% | 2493 fps | 99.1% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 52,823 psi | 85% | 2556 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 92% | 55,941 psi | 90% | 2635 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 53,708 psi | 86% | 2585 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 52,852 psi | 85% | 2612 fps | 99.9% |
| Rottweil R 901 | <<locked>> | 82% | 54,143 psi | 87% | 2428 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 53,592 psi | 86% | 2451 fps | 100% |
| Rottweil R 903 | <<locked>> | 92% | 56,072 psi | 90% | 2533 fps | 100% |
| Rottweil R 904ᴾ | <<locked>> | 100% | 53,795 psi | 86% | 2520 fps | 96.3% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 49,980 psi | 80% | 2523 fps | 97.1% |
| Rottweil R 907 | <<locked>> | 94% | 55,825 psi | 90% | 2520 fps | 98.7% |
| Shooters World Long Rifle | <<locked>> | 94% | 53,867 psi | 86% | 2497 fps | 99.5% |
| Shooters World Match Rifle | <<locked>> | 84% | 54,041 psi | 87% | 2477 fps | 100% |
| Shooters World Precision | <<locked>> | 88% | 54,679 psi | 88% | 2484 fps | 100% |
| Shooters World SW4350 | <<locked>> | 96% | 54,781 psi | 88% | 2530 fps | 99.1% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 54,201 psi | 87% | 2543 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 55,259 psi | 89% | 2507 fps | 99.9% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 55,941 psi | 90% | 2523 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 54,317 psi | 87% | 2392 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 54,694 psi | 88% | 2395 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 53,867 psi | 86% | 2454 fps | 98.8% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 49,501 psi | 79% | 2516 fps | 97% |
| Somchem S335 | <<locked>> | 84% | 53,737 psi | 86% | 2388 fps | 100% |
| Somchem S341 | <<locked>> | 84% | 54,940 psi | 88% | 2497 fps | 100% |
| Somchem S355 | <<locked>> | 92% | 56,115 psi | 90% | 2526 fps | 100% |
| Somchem S361ᴾ | <<locked>> | 100% | 55,680 psi | 89% | 2516 fps | 95.7% |
| Somchem S365ᴾ | <<locked>> | 100% | 54,694 psi | 88% | 2595 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 50,604 psi | 81% | 2503 fps | 97.9% |
| Vihtavuori N133 | <<locked>> | 84% | 54,694 psi | 88% | 2375 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 53,664 psi | 86% | 2418 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 53,954 psi | 87% | 2431 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 54,114 psi | 87% | 2464 fps | 100% |
| Vihtavuori N160 | <<locked>> | 96% | 55,390 psi | 89% | 2546 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 43,685 psi | 70% | 2382 fps | 95.9% |
| Vihtavuori N530 | <<locked>> | 82% | 53,519 psi | 86% | 2454 fps | 100% |
| Vihtavuori N540 | <<locked>> | 88% | 55,666 psi | 89% | 2474 fps | 100% |
| Vihtavuori N550 | <<locked>> | 96% | 54,389 psi | 87% | 2552 fps | 99.9% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 46,833 psi | 75% | 2507 fps | 99.9% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 55,376 psi | 89% | 2526 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 53,476 psi | 86% | 2497 fps | 100% |
| Winchester 760 | <<locked>> | 94% | 53,330 psi | 86% | 2566 fps | 98.9% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 37,710 psi | 60% | 2464 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 86% | 56,072 psi | 90% | 2533 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 47,485 psi | 76% | 2444 fps | 96.1% |
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% | 51,967 psi | 83% | 2359 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 44,643 psi | 72% | 2303 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 52,069 psi | 83% | 2444 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 43,468 psi | 70% | 2293 fps | 96.1% |
| Accurate 3100 | <<locked>> | 92% | 33,837 psi | 54% | 2218 fps | 95.2% |
| Accurate 4064 | <<locked>> | 80% | 42,264 psi | 68% | 2306 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 31,372 psi | 50% | 2172 fps | 96.3% |
| ADI AR 2206H | <<locked>> | 80% | 47,950 psi | 77% | 2411 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 40,698 psi | 65% | 2280 fps | 99.1% |
| ADI AR 2209 | <<locked>> | 96% | 45,948 psi | 74% | 2448 fps | 95.7% |
| ADI Benchmark 8208 | <<locked>> | 80% | 49,995 psi | 80% | 2411 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 50,850 psi | 82% | 2382 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 43,729 psi | 70% | 2454 fps | 99.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 40,596 psi | 65% | 2303 fps | 99.8% |
| Alliant Reloder-15 | <<locked>> | 80% | 43,555 psi | 70% | 2362 fps | 99.6% |
| Alliant Reloder-16 | <<locked>> | 80% | 31,604 psi | 51% | 2182 fps | 96.4% |
| Alliant Reloder-17 | 55.8 gr | 80% | 35,172 psi | 56% | 2293 fps | 99.1% |
| Alliant Reloder-19 | <<locked>> | 96% | 45,020 psi | 72% | 2438 fps | 95.7% |
| Alliant Reloder-23 | <<locked>> | 84% | 25,831 psi | 41% | 2060 fps | 95.2% |
| Alliant Reloder-25 | <<locked>> | 96% | 32,953 psi | 53% | 2254 fps | 95% |
| Alliant Reloder-26 | <<locked>> | 88% | 31,241 psi | 50% | 2260 fps | 95.4% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 47,152 psi | 76% | 2421 fps | 99.7% |
| Bofors RP3 | <<locked>> | 80% | 40,350 psi | 65% | 2310 fps | 99.8% |
| Bofors RP7 | <<locked>> | 82% | 38,653 psi | 62% | 2241 fps | 95% |
| Hodgdon Benchmark | <<locked>> | 80% | 51,605 psi | 83% | 2395 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 49,008 psi | 79% | 2434 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 41,046 psi | 66% | 2313 fps | 98.4% |
| Hodgdon H414 | <<locked>> | 84% | 38,247 psi | 61% | 2313 fps | 95.7% |
| Hodgdon H4350 | <<locked>> | 84% | 41,597 psi | 67% | 2329 fps | 95.1% |
| Hodgdon H4895 | <<locked>> | 80% | 48,414 psi | 78% | 2421 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 28,979 psi | 46% | 2093 fps | 97.2% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 44,411 psi | 71% | 2398 fps | 100% |
| Hodgdon Superformance | 63.4 gr | 86% | 40,205 psi | 64% | 2375 fps | 95.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,760 psi | 43% | 1348 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 46,296 psi | 74% | 2375 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 48,515 psi | 78% | 2402 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 42,786 psi | 69% | 2310 fps | 99.5% |
| IMR 4166 Enduron | <<locked>> | 80% | 45,165 psi | 72% | 2333 fps | 97.3% |
| IMR 4350 | <<locked>> | 86% | 38,725 psi | 62% | 2267 fps | 95% |
| IMR 4451 Enduron | <<locked>> | 80% | 37,652 psi | 60% | 2221 fps | 95.1% |
| IMR 4831 | <<locked>> | 80% | 30,414 psi | 49% | 2136 fps | 96% |
| IMR 4895 | <<locked>> | 80% | 44,657 psi | 72% | 2385 fps | 99.9% |
| IMR 8208 XBR | <<locked>> | 80% | 49,995 psi | 80% | 2411 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 47,413 psi | 76% | 2388 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 47,471 psi | 76% | 2346 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 42,772 psi | 69% | 2310 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 35,215 psi | 56% | 2178 fps | 96% |
| Lovex S070 | <<locked>> | 84% | 37,840 psi | 61% | 2251 fps | 95.7% |
| Lovex S071 | <<locked>> | 98% | 34,693 psi | 56% | 2234 fps | 95.6% |
| Norma 201 | <<locked>> | 80% | 46,891 psi | 75% | 2362 fps | 100% |
| Norma 202 | <<locked>> | 80% | 47,311 psi | 76% | 2365 fps | 100% |
| Norma 203B | <<locked>> | 80% | 42,931 psi | 69% | 2349 fps | 99.7% |
| Norma 204 | <<locked>> | 90% | 43,729 psi | 70% | 2392 fps | 95% |
| Norma MRP | <<locked>> | 94% | 38,566 psi | 62% | 2392 fps | 95.4% |
| Norma URP | <<locked>> | 80% | 31,662 psi | 51% | 2172 fps | 96.2% |
| Ramshot Big Game | <<locked>> | 80% | 42,453 psi | 68% | 2365 fps | 99.6% |
| Ramshot Hunter | <<locked>> | 84% | 34,998 psi | 56% | 2254 fps | 95.4% |
| Ramshot TAC | <<locked>> | 80% | 49,705 psi | 80% | 2428 fps | 99.2% |
| Ramshot Wild Boar | <<locked>> | 80% | 49,530 psi | 79% | 2444 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,267 psi | 44% | 1381 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 41,350 psi | 66% | 2300 fps | 97.1% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 46,224 psi | 74% | 2457 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 37,420 psi | 60% | 2346 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 30,951 psi | 50% | 2182 fps | 95.7% |
| ReloadSwiss RS 70 | 58.1 gr | 82% | 33,112 psi | 53% | 2241 fps | 95.7% |
| Rottweil R 901 | <<locked>> | 80% | 50,952 psi | 82% | 2388 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 44,744 psi | 72% | 2323 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 38,130 psi | 61% | 2264 fps | 99.5% |
| Rottweil R 904 | <<locked>> | 98% | 50,531 psi | 81% | 2474 fps | 95.6% |
| Rottweil R 905 | <<locked>> | 96% | 43,729 psi | 70% | 2421 fps | 95.6% |
| Rottweil R 907 | <<locked>> | 82% | 38,653 psi | 62% | 2241 fps | 95% |
| Shooters World Long Rifle | <<locked>> | 80% | 35,215 psi | 56% | 2178 fps | 96% |
| Shooters World Match Rifle | <<locked>> | 80% | 47,413 psi | 76% | 2388 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 42,772 psi | 69% | 2310 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 37,840 psi | 61% | 2251 fps | 95.7% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 38,986 psi | 63% | 2306 fps | 99.2% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 48,211 psi | 77% | 2405 fps | 99.4% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 46,296 psi | 74% | 2385 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 48,153 psi | 77% | 2310 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 40,292 psi | 65% | 2198 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 36,666 psi | 59% | 2175 fps | 95.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 43,337 psi | 69% | 2415 fps | 95.5% |
| Somchem S335 | <<locked>> | 80% | 47,688 psi | 76% | 2310 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 47,979 psi | 77% | 2402 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 38,754 psi | 62% | 2264 fps | 99.5% |
| Somchem S361 | <<locked>> | 98% | 52,170 psi | 84% | 2467 fps | 95% |
| Somchem S365 | <<locked>> | 80% | 28,413 psi | 46% | 2133 fps | 98.3% |
| Somchem S385 | <<locked>> | 92% | 39,044 psi | 63% | 2310 fps | 95.1% |
| Vihtavuori N133 | <<locked>> | 80% | 48,559 psi | 78% | 2300 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 44,512 psi | 71% | 2297 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 44,846 psi | 72% | 2306 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 36,912 psi | 59% | 2205 fps | 99.8% |
| Vihtavuori N160 | <<locked>> | 80% | 32,996 psi | 53% | 2172 fps | 96.6% |
| Vihtavuori N165 | <<locked>> | 98% | 40,828 psi | 65% | 2333 fps | 95.1% |
| Vihtavuori N530 | <<locked>> | 80% | 50,009 psi | 80% | 2405 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 43,120 psi | 69% | 2303 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 32,401 psi | 52% | 2172 fps | 96.2% |
| Vihtavuori N555 | <<locked>> | 84% | 27,702 psi | 44% | 2126 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 32,489 psi | 52% | 2152 fps | 98.5% |
| Winchester 748 | <<locked>> | 80% | 50,241 psi | 81% | 2451 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 38,247 psi | 61% | 2313 fps | 95.7% |
| Winchester StaBALL HD | <<locked>> | 88% | 25,773 psi | 41% | 2129 fps | 95.7% |
| Winchester StaBALL Match | <<locked>> | 80% | 46,021 psi | 74% | 2392 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 44,251 psi | 71% | 2392 fps | 95.3% |
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 118 powders for .338 Win Mag. loaded with the .338 | 250gr | Barnes Banded Solid. Alliant Reloder-17 delivers the highest muzzle velocity at 2,641 fps; across all powders the maximum-charge window runs from 1,512 fps to 2,641 fps. Accurate 3100 gives the best case fill at 100 %, and 118 of the 118 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 1:14.5 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, Hodgdon Superformance, Alliant Reloder-17 rank at the top here: for .338 Win Mag. with the .338 | 250gr | Barnes Banded Solid they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate MAGPRO, ADI AR 2213, 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.