Load Specifications
Bullet Manufacturer:Nosler
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:1:15.5
Load data in caliber .338 Win Mag. with .338 | 250gr | Nosler Partition RN 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, 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% | 56,115 psi | 90% | 2418 fps | 100% |
| Accurate 2495 | <<locked>> | 86% | 55,172 psi | 88% | 2444 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 53,592 psi | 86% | 2461 fps | 98.3% |
| Accurate 3100ᴾ | <<locked>> | 100% | 45,614 psi | 73% | 2438 fps | 98.5% |
| Accurate 4064 | <<locked>> | 88% | 55,463 psi | 89% | 2493 fps | 100% |
| Accurate 4350 | <<locked>> | 96% | 55,317 psi | 89% | 2585 fps | 100% |
| ADI AR 2206H | <<locked>> | 84% | 55,056 psi | 88% | 2520 fps | 100% |
| ADI AR 2208 | <<locked>> | 90% | 56,086 psi | 90% | 2523 fps | 100% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 53,055 psi | 85% | 2569 fps | 97.5% |
| ADI Benchmark 8208 | <<locked>> | 82% | 54,041 psi | 87% | 2474 fps | 100% |
| Alliant AR-Comp | <<locked>> | 82% | 55,448 psi | 89% | 2444 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 54,926 psi | 88% | 2638 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 53,156 psi | 85% | 2503 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 53,505 psi | 86% | 2520 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 98% | 56,173 psi | 90% | 2635 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 92% | 53,708 psi | 86% | 2615 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 52,127 psi | 84% | 2559 fps | 97.5% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 45,701 psi | 73% | 2507 fps | 96.3% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 43,091 psi | 69% | 2461 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 37,884 psi | 61% | 2379 fps | 97.3% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 48,602 psi | 78% | 2621 fps | 99.8% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 54,926 psi | 88% | 2543 fps | 100% |
| Bofors RP3 | <<locked>> | 88% | 53,650 psi | 86% | 2516 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 45,701 psi | 73% | 2507 fps | 96.3% |
| Bofors RP7 | <<locked>> | 92% | 53,490 psi | 86% | 2497 fps | 98.5% |
| Hodgdon Benchmark | <<locked>> | 82% | 55,405 psi | 89% | 2451 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 82% | 53,476 psi | 86% | 2503 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 54,462 psi | 87% | 2530 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 94% | 54,273 psi | 87% | 2585 fps | 99.1% |
| Hodgdon H4350 | <<locked>> | 92% | 54,839 psi | 88% | 2552 fps | 98.2% |
| Hodgdon H4895 | <<locked>> | 84% | 55,622 psi | 89% | 2526 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 56,275 psi | 90% | 2562 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 55,419 psi | 89% | 2562 fps | 100% |
| Hodgdon Superformance | <<locked>> | 94% | 54,491 psi | 87% | 2625 fps | 98.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,897 psi | 58% | 1519 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 53,490 psi | 86% | 2487 fps | 100% |
| IMR 3031 | <<locked>> | 84% | 56,057 psi | 90% | 2503 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 55,666 psi | 89% | 2507 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 86% | 55,347 psi | 89% | 2497 fps | 99.1% |
| IMR 4350 | <<locked>> | 96% | 53,809 psi | 86% | 2523 fps | 98.5% |
| IMR 4451 Enduron | <<locked>> | 92% | 55,216 psi | 89% | 2523 fps | 99% |
| IMR 4831 | <<locked>> | 98% | 55,666 psi | 89% | 2579 fps | 100% |
| IMR 4895 | <<locked>> | 86% | 54,897 psi | 88% | 2546 fps | 100% |
| IMR 8208 XBR | <<locked>> | 82% | 54,041 psi | 87% | 2474 fps | 100% |
| Lovex D073.6 | <<locked>> | 84% | 55,201 psi | 89% | 2497 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 54,418 psi | 87% | 2454 fps | 100% |
| Lovex S062 | <<locked>> | 88% | 55,579 psi | 89% | 2500 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 54,781 psi | 88% | 2516 fps | 99.7% |
| Lovex S070 | <<locked>> | 96% | 55,985 psi | 90% | 2556 fps | 99.3% |
| Lovex S071ᴾ | <<locked>> | 100% | 37,956 psi | 61% | 2306 fps | 96.8% |
| Norma 201 | <<locked>> | 84% | 53,896 psi | 86% | 2470 fps | 100% |
| Norma 202 | <<locked>> | 84% | 54,462 psi | 87% | 2467 fps | 100% |
| Norma 203B | <<locked>> | 88% | 56,289 psi | 90% | 2552 fps | 100% |
| Norma 204 | <<locked>> | 96% | 54,389 psi | 87% | 2569 fps | 97.6% |
| Norma MRPᴾ | <<locked>> | 100% | 48,124 psi | 77% | 2579 fps | 98.2% |
| Norma URP | <<locked>> | 96% | 54,230 psi | 87% | 2575 fps | 100% |
| Ramshot Big Game | <<locked>> | 86% | 53,171 psi | 85% | 2533 fps | 100% |
| Ramshot Hunter | <<locked>> | 98% | 56,376 psi | 90% | 2621 fps | 99.7% |
| Ramshot TAC | <<locked>> | 82% | 53,925 psi | 86% | 2497 fps | 99.7% |
| Ramshot Wild Boar | <<locked>> | 82% | 53,896 psi | 86% | 2510 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,579 psi | 59% | 1558 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 54,621 psi | 88% | 2516 fps | 99.4% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 54,056 psi | 87% | 2579 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 53,490 psi | 86% | 2612 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 54,897 psi | 88% | 2608 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 53,896 psi | 86% | 2635 fps | 99.9% |
| Rottweil R 901 | <<locked>> | 82% | 54,926 psi | 88% | 2448 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 54,491 psi | 87% | 2470 fps | 100% |
| Rottweil R 903 | <<locked>> | 90% | 53,780 psi | 86% | 2510 fps | 100% |
| Rottweil R 904ᴾ | <<locked>> | 100% | 54,868 psi | 88% | 2543 fps | 96.7% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 51,068 psi | 82% | 2546 fps | 97.5% |
| Rottweil R 907 | <<locked>> | 92% | 53,490 psi | 86% | 2497 fps | 98.5% |
| Shooters World Long Rifle | <<locked>> | 94% | 54,781 psi | 88% | 2516 fps | 99.7% |
| Shooters World Match Rifle | <<locked>> | 84% | 55,201 psi | 89% | 2497 fps | 100% |
| Shooters World Precision | <<locked>> | 88% | 55,579 psi | 89% | 2500 fps | 100% |
| Shooters World SW4350 | <<locked>> | 96% | 55,985 psi | 90% | 2556 fps | 99.3% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 55,172 psi | 88% | 2562 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 56,362 psi | 90% | 2530 fps | 99.9% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 53,505 psi | 86% | 2497 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 55,288 psi | 89% | 2408 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 55,564 psi | 89% | 2411 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 55,042 psi | 88% | 2480 fps | 99% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 50,589 psi | 81% | 2543 fps | 97.3% |
| Somchem S335 | <<locked>> | 84% | 54,621 psi | 88% | 2408 fps | 100% |
| Somchem S341 | <<locked>> | 84% | 55,956 psi | 90% | 2516 fps | 100% |
| Somchem S355 | <<locked>> | 90% | 53,882 psi | 86% | 2507 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 56,072 psi | 90% | 2618 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 51,677 psi | 83% | 2526 fps | 98.2% |
| Vihtavuori N133 | <<locked>> | 84% | 55,680 psi | 89% | 2392 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 54,433 psi | 87% | 2431 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 55,129 psi | 88% | 2451 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 55,187 psi | 88% | 2487 fps | 100% |
| Vihtavuori N160 | <<locked>> | 94% | 52,997 psi | 85% | 2523 fps | 99.9% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 44,643 psi | 72% | 2405 fps | 96.4% |
| Vihtavuori N530 | <<locked>> | 82% | 54,418 psi | 87% | 2470 fps | 100% |
| Vihtavuori N540 | <<locked>> | 86% | 53,200 psi | 85% | 2451 fps | 100% |
| Vihtavuori N550 | <<locked>> | 96% | 55,564 psi | 89% | 2575 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 48,051 psi | 77% | 2530 fps | 99.9% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 56,333 psi | 90% | 2543 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 54,650 psi | 88% | 2516 fps | 100% |
| Winchester 760 | <<locked>> | 94% | 54,505 psi | 87% | 2589 fps | 99.1% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 38,638 psi | 62% | 2493 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 84% | 53,316 psi | 85% | 2503 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 48,399 psi | 78% | 2467 fps | 96.5% |
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% | 52,794 psi | 85% | 2375 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 45,687 psi | 73% | 2323 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 44,193 psi | 71% | 2316 fps | 96.4% |
| Accurate 3100 | <<locked>> | 92% | 34,882 psi | 56% | 2244 fps | 95.8% |
| Accurate 4064 | <<locked>> | 80% | 43,250 psi | 69% | 2329 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 32,024 psi | 51% | 2192 fps | 96.7% |
| ADI AR 2206H | <<locked>> | 80% | 48,602 psi | 78% | 2428 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 41,336 psi | 66% | 2300 fps | 99.3% |
| ADI AR 2209 | <<locked>> | 94% | 43,947 psi | 70% | 2421 fps | 95.3% |
| ADI Benchmark 8208 | <<locked>> | 80% | 50,705 psi | 81% | 2428 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 52,011 psi | 83% | 2402 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 44,730 psi | 72% | 2480 fps | 99.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 41,510 psi | 67% | 2323 fps | 99.9% |
| Alliant Reloder-15 | <<locked>> | 80% | 44,237 psi | 71% | 2379 fps | 99.7% |
| Alliant Reloder-16 | <<locked>> | 80% | 32,126 psi | 52% | 2201 fps | 96.8% |
| Alliant Reloder-17 | 56.9 gr | 80% | 35,897 psi | 58% | 2316 fps | 99.3% |
| Alliant Reloder-19 | <<locked>> | 94% | 43,149 psi | 69% | 2415 fps | 95.3% |
| Alliant Reloder-22 | <<locked>> | 98% | 42,946 psi | 69% | 2454 fps | 95.4% |
| Alliant Reloder-23 | <<locked>> | 84% | 26,382 psi | 42% | 2083 fps | 95.8% |
| Alliant Reloder-25 | <<locked>> | 96% | 33,547 psi | 54% | 2277 fps | 95.5% |
| Alliant Reloder-26 | <<locked>> | 88% | 31,908 psi | 51% | 2283 fps | 95.9% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 48,124 psi | 77% | 2444 fps | 99.8% |
| Bofors RP3 | <<locked>> | 80% | 41,249 psi | 66% | 2329 fps | 99.9% |
| Bofors RP5 | <<locked>> | 98% | 42,946 psi | 69% | 2454 fps | 95.4% |
| Bofors RP7 | <<locked>> | 82% | 39,378 psi | 63% | 2260 fps | 95.4% |
| Hodgdon Benchmark | <<locked>> | 80% | 52,257 psi | 84% | 2411 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 50,096 psi | 80% | 2457 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 41,887 psi | 67% | 2336 fps | 98.7% |
| Hodgdon H414 | <<locked>> | 82% | 36,506 psi | 59% | 2283 fps | 95.2% |
| Hodgdon H4350 | <<locked>> | 84% | 42,554 psi | 68% | 2356 fps | 95.5% |
| Hodgdon H4895 | <<locked>> | 80% | 49,124 psi | 79% | 2438 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 29,675 psi | 48% | 2116 fps | 97.6% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 45,513 psi | 73% | 2425 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 38,174 psi | 61% | 2343 fps | 95.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,905 psi | 43% | 1358 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 47,195 psi | 76% | 2395 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 49,385 psi | 79% | 2421 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 43,453 psi | 70% | 2329 fps | 99.6% |
| IMR 4166 Enduron | <<locked>> | 80% | 45,919 psi | 74% | 2352 fps | 97.6% |
| IMR 4350 | <<locked>> | 86% | 39,595 psi | 63% | 2290 fps | 95.5% |
| IMR 4451 Enduron | <<locked>> | 80% | 38,406 psi | 62% | 2244 fps | 95.6% |
| IMR 4831 | <<locked>> | 80% | 31,183 psi | 50% | 2159 fps | 96.4% |
| IMR 4895 | <<locked>> | 80% | 45,368 psi | 73% | 2405 fps | 99.9% |
| IMR 8208 XBR | <<locked>> | 80% | 50,705 psi | 81% | 2428 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 48,356 psi | 78% | 2408 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 48,370 psi | 78% | 2369 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 43,700 psi | 70% | 2333 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 35,955 psi | 58% | 2201 fps | 96.4% |
| Lovex S070 | <<locked>> | 82% | 36,332 psi | 58% | 2228 fps | 95.3% |
| Lovex S071 | <<locked>> | 96% | 33,359 psi | 53% | 2215 fps | 95.2% |
| Norma 201 | <<locked>> | 80% | 47,819 psi | 77% | 2385 fps | 100% |
| Norma 202 | <<locked>> | 80% | 48,269 psi | 77% | 2385 fps | 100% |
| Norma 203B | <<locked>> | 80% | 43,627 psi | 70% | 2369 fps | 99.8% |
| Norma 204 | <<locked>> | 90% | 44,541 psi | 71% | 2415 fps | 95.5% |
| Norma MRP | <<locked>> | 92% | 36,999 psi | 59% | 2365 fps | 95% |
| Norma URP | <<locked>> | 80% | 32,271 psi | 52% | 2192 fps | 96.6% |
| Ramshot Big Game | <<locked>> | 80% | 43,511 psi | 70% | 2388 fps | 99.8% |
| Ramshot Hunter | <<locked>> | 82% | 33,547 psi | 54% | 2228 fps | 95% |
| Ramshot TAC | <<locked>> | 80% | 50,691 psi | 81% | 2451 fps | 99.4% |
| Ramshot Wild Boar | <<locked>> | 80% | 50,560 psi | 81% | 2467 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,224 psi | 44% | 1388 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 42,119 psi | 68% | 2320 fps | 97.4% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 47,210 psi | 76% | 2480 fps | 99.9% |
| ReloadSwiss RS 60 | 56.9 gr | 80% | 38,174 psi | 61% | 2369 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 31,691 psi | 51% | 2208 fps | 96.1% |
| ReloadSwiss RS 70 | 57.8 gr | 80% | 31,560 psi | 51% | 2208 fps | 95.1% |
| Rottweil R 901 | <<locked>> | 80% | 51,764 psi | 83% | 2405 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 45,484 psi | 73% | 2343 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 38,798 psi | 62% | 2280 fps | 99.7% |
| Rottweil R 904 | <<locked>> | 96% | 48,544 psi | 78% | 2451 fps | 95.3% |
| Rottweil R 905 | <<locked>> | 94% | 41,872 psi | 67% | 2395 fps | 95.2% |
| Rottweil R 907 | <<locked>> | 82% | 39,378 psi | 63% | 2260 fps | 95.4% |
| Shooters World Long Rifle | <<locked>> | 80% | 35,955 psi | 58% | 2201 fps | 96.4% |
| Shooters World Match Rifle | <<locked>> | 80% | 48,356 psi | 78% | 2408 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 43,700 psi | 70% | 2333 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 36,332 psi | 58% | 2228 fps | 95.3% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 39,798 psi | 64% | 2329 fps | 99.4% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 49,226 psi | 79% | 2428 fps | 99.5% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 47,137 psi | 76% | 2405 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 48,878 psi | 78% | 2326 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 40,959 psi | 66% | 2215 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 37,362 psi | 60% | 2195 fps | 95.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 41,481 psi | 67% | 2392 fps | 95.1% |
| Somchem S335 | <<locked>> | 80% | 48,588 psi | 78% | 2329 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 49,023 psi | 79% | 2421 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 39,639 psi | 64% | 2287 fps | 99.6% |
| Somchem S365 | <<locked>> | 80% | 28,964 psi | 46% | 2152 fps | 98.6% |
| Somchem S385 | <<locked>> | 92% | 40,045 psi | 64% | 2336 fps | 95.6% |
| Vihtavuori N133 | <<locked>> | 80% | 49,313 psi | 79% | 2316 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 45,324 psi | 73% | 2313 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 45,527 psi | 73% | 2326 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 37,550 psi | 60% | 2224 fps | 99.9% |
| Vihtavuori N160 | <<locked>> | 80% | 33,605 psi | 54% | 2192 fps | 97% |
| Vihtavuori N165 | <<locked>> | 98% | 41,756 psi | 67% | 2356 fps | 95.6% |
| Vihtavuori N530 | <<locked>> | 80% | 50,952 psi | 82% | 2428 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 43,918 psi | 70% | 2320 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 33,141 psi | 53% | 2195 fps | 96.6% |
| Vihtavuori N555 | <<locked>> | 82% | 26,658 psi | 43% | 2100 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 33,214 psi | 53% | 2175 fps | 98.8% |
| Winchester 748 | <<locked>> | 80% | 51,227 psi | 82% | 2474 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 36,666 psi | 59% | 2287 fps | 95.3% |
| Winchester StaBALL HD | <<locked>> | 86% | 24,772 psi | 40% | 2100 fps | 95.1% |
| Winchester StaBALL Match | <<locked>> | 80% | 46,847 psi | 75% | 2411 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 45,368 psi | 73% | 2418 fps | 95.8% |
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 119 powders for .338 Win Mag. loaded with the .338 | 250gr | Nosler Partition RN. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,638 fps; across all powders the maximum-charge window runs from 1,519 fps to 2,638 fps. Accurate 3100 gives the best case fill at 100 %, and 119 of the 119 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (430 MPa), the top charges use 58–90 %, leaving at least 10 % headroom. The 250.0 gr projectile in 0.338" calls for a 1:15.5 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, Alliant Reloder-17, ReloadSwiss RS 60 rank at the top here: for .338 Win Mag. with the .338 | 250gr | Nosler Partition RN they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate MAGPRO, ADI AR 2213, Hodgdon H1000 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.