Load Specifications
Bullet Manufacturer:Woodleigh
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:1:16.5
Load data in caliber .338 Win Mag. with .338 | 250gr | Woodleigh PP SN bullet and 105 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 60, ReloadSwiss RS 70 and Alliant Reloder-16.
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 2495 | <<locked>> | 86% | 56,318 psi | 90% | 2464 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 54,375 psi | 87% | 2480 fps | 98.5% |
| Accurate 3100ᴾ | <<locked>> | 100% | 46,615 psi | 75% | 2457 fps | 98.7% |
| Accurate 4064 | <<locked>> | 88% | 56,275 psi | 90% | 2510 fps | 100% |
| Accurate 4350 | <<locked>> | 96% | 56,275 psi | 90% | 2605 fps | 100% |
| ADI AR 2206H | <<locked>> | 84% | 56,043 psi | 90% | 2539 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 53,519 psi | 86% | 2497 fps | 100% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 54,012 psi | 87% | 2592 fps | 97.8% |
| ADI Benchmark 8208 | <<locked>> | 82% | 54,795 psi | 88% | 2490 fps | 100% |
| Alliant AR-Comp | <<locked>> | 82% | 56,159 psi | 90% | 2454 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 55,811 psi | 89% | 2654 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 53,882 psi | 86% | 2516 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 54,230 psi | 87% | 2536 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 96% | 53,664 psi | 86% | 2605 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 92% | 54,853 psi | 88% | 2635 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 53,069 psi | 85% | 2582 fps | 97.8% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 46,572 psi | 75% | 2526 fps | 96.6% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 44,005 psi | 71% | 2480 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 38,624 psi | 62% | 2402 fps | 97.7% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 49,501 psi | 79% | 2641 fps | 99.9% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 55,782 psi | 89% | 2559 fps | 100% |
| Bofors RP3 | <<locked>> | 88% | 54,607 psi | 88% | 2533 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 46,572 psi | 75% | 2526 fps | 96.6% |
| Bofors RP7 | <<locked>> | 92% | 54,331 psi | 87% | 2513 fps | 98.7% |
| Hodgdon Benchmark | <<locked>> | 82% | 56,173 psi | 90% | 2467 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 82% | 54,389 psi | 87% | 2520 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 55,129 psi | 88% | 2546 fps | 100% |
| Hodgdon H414 | <<locked>> | 94% | 55,114 psi | 88% | 2605 fps | 99.2% |
| Hodgdon H4350 | <<locked>> | 92% | 55,651 psi | 89% | 2569 fps | 98.4% |
| Hodgdon H4895 | <<locked>> | 82% | 53,171 psi | 85% | 2500 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 53,693 psi | 86% | 2536 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 56,420 psi | 90% | 2582 fps | 100% |
| Hodgdon Superformance | <<locked>> | 94% | 55,405 psi | 89% | 2641 fps | 99.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,027 psi | 58% | 1529 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 54,201 psi | 87% | 2503 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 53,563 psi | 86% | 2480 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 56,405 psi | 90% | 2523 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 86% | 55,970 psi | 90% | 2513 fps | 99.2% |
| IMR 4350 | <<locked>> | 96% | 54,839 psi | 88% | 2543 fps | 98.8% |
| IMR 4451 Enduron | <<locked>> | 92% | 56,028 psi | 90% | 2539 fps | 99.2% |
| IMR 4831 | <<locked>> | 96% | 53,214 psi | 85% | 2549 fps | 100% |
| IMR 4895 | <<locked>> | 86% | 55,637 psi | 89% | 2559 fps | 100% |
| IMR 4955 Enduronᴾ | <<locked>> | 100% | 53,766 psi | 86% | 2530 fps | 96% |
| IMR 8208 XBR | <<locked>> | 82% | 54,795 psi | 88% | 2490 fps | 100% |
| Lovex D073.6 | <<locked>> | 84% | 55,985 psi | 90% | 2513 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 55,129 psi | 88% | 2470 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 53,113 psi | 85% | 2477 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 55,608 psi | 89% | 2533 fps | 99.8% |
| Lovex S070 | <<locked>> | 94% | 53,301 psi | 85% | 2526 fps | 99.1% |
| Lovex S071ᴾ | <<locked>> | 100% | 38,696 psi | 62% | 2323 fps | 97.1% |
| Norma 201 | <<locked>> | 84% | 54,679 psi | 88% | 2484 fps | 100% |
| Norma 202 | <<locked>> | 84% | 55,245 psi | 89% | 2484 fps | 100% |
| Norma 203B | <<locked>> | 86% | 53,505 psi | 86% | 2523 fps | 100% |
| Norma 204 | <<locked>> | 96% | 55,390 psi | 89% | 2592 fps | 97.9% |
| Norma MRPᴾ | <<locked>> | 100% | 49,240 psi | 79% | 2602 fps | 98.5% |
| Norma URP | <<locked>> | 96% | 55,100 psi | 88% | 2592 fps | 100% |
| Ramshot Big Game | <<locked>> | 86% | 54,027 psi | 87% | 2549 fps | 100% |
| Ramshot Hunter | <<locked>> | 96% | 53,853 psi | 86% | 2595 fps | 99.6% |
| Ramshot TAC | <<locked>> | 82% | 54,766 psi | 88% | 2516 fps | 99.8% |
| Ramshot Wild Boar | <<locked>> | 82% | 54,810 psi | 88% | 2530 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,724 psi | 59% | 1565 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 55,390 psi | 89% | 2536 fps | 99.5% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 54,882 psi | 88% | 2595 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 54,418 psi | 87% | 2628 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 56,014 psi | 90% | 2628 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 54,824 psi | 88% | 2654 fps | 100% |
| Rottweil R 901 | <<locked>> | 82% | 55,796 psi | 89% | 2464 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 55,245 psi | 89% | 2484 fps | 100% |
| Rottweil R 903 | <<locked>> | 90% | 54,462 psi | 87% | 2526 fps | 100% |
| Rottweil R 904ᴾ | <<locked>> | 100% | 55,840 psi | 90% | 2566 fps | 97% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 52,127 psi | 84% | 2569 fps | 97.8% |
| Rottweil R 907 | <<locked>> | 92% | 54,331 psi | 87% | 2513 fps | 98.7% |
| Shooters World Long Rifle | <<locked>> | 94% | 55,608 psi | 89% | 2533 fps | 99.8% |
| Shooters World Match Rifle | <<locked>> | 84% | 55,985 psi | 90% | 2513 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 53,113 psi | 85% | 2477 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 53,301 psi | 85% | 2526 fps | 99.1% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 56,072 psi | 90% | 2582 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 53,432 psi | 86% | 2497 fps | 99.9% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 54,201 psi | 87% | 2513 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 55,854 psi | 90% | 2421 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 56,260 psi | 90% | 2425 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 55,796 psi | 89% | 2497 fps | 99.2% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 51,634 psi | 83% | 2566 fps | 97.7% |
| Somchem S335 | <<locked>> | 84% | 55,361 psi | 89% | 2421 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 53,127 psi | 85% | 2487 fps | 100% |
| Somchem S355 | <<locked>> | 90% | 54,578 psi | 88% | 2520 fps | 100% |
| Somchem S361 | <<locked>> | 98% | 54,041 psi | 87% | 2513 fps | 95.7% |
| Somchem S365 | <<locked>> | 98% | 53,461 psi | 86% | 2589 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 52,634 psi | 84% | 2546 fps | 98.5% |
| Vihtavuori N133 | <<locked>> | 84% | 56,260 psi | 90% | 2405 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 55,317 psi | 89% | 2448 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 55,825 psi | 90% | 2464 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 56,086 psi | 90% | 2500 fps | 100% |
| Vihtavuori N160 | <<locked>> | 94% | 54,099 psi | 87% | 2543 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 45,469 psi | 73% | 2425 fps | 96.7% |
| Vihtavuori N530 | <<locked>> | 82% | 55,172 psi | 88% | 2487 fps | 100% |
| Vihtavuori N540 | <<locked>> | 86% | 53,853 psi | 86% | 2464 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 53,098 psi | 85% | 2549 fps | 99.9% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 48,921 psi | 78% | 2546 fps | 100% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 53,708 psi | 86% | 2516 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 55,448 psi | 89% | 2533 fps | 100% |
| Winchester 760 | <<locked>> | 94% | 55,376 psi | 89% | 2608 fps | 99.3% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 39,392 psi | 63% | 2513 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 84% | 54,215 psi | 87% | 2520 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 49,501 psi | 79% | 2493 fps | 96.9% |
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 2495 | <<locked>> | 80% | 46,325 psi | 74% | 2339 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 44,788 psi | 72% | 2333 fps | 96.7% |
| Accurate 3100 | <<locked>> | 90% | 33,243 psi | 53% | 2215 fps | 95.3% |
| Accurate 4064 | <<locked>> | 80% | 43,874 psi | 70% | 2343 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 32,677 psi | 52% | 2211 fps | 97% |
| ADI AR 2206H | <<locked>> | 80% | 49,385 psi | 79% | 2448 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 42,047 psi | 67% | 2316 fps | 99.4% |
| ADI AR 2209 | <<locked>> | 94% | 44,614 psi | 72% | 2438 fps | 95.7% |
| ADI Benchmark 8208 | <<locked>> | 80% | 51,459 psi | 83% | 2444 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 52,750 psi | 85% | 2415 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 45,411 psi | 73% | 2500 fps | 99.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 42,061 psi | 67% | 2339 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 44,991 psi | 72% | 2398 fps | 99.8% |
| Alliant Reloder-16 | 53.7 gr | 80% | 32,692 psi | 52% | 2224 fps | 97.2% |
| Alliant Reloder-17 | <<locked>> | 80% | 36,477 psi | 58% | 2333 fps | 99.5% |
| Alliant Reloder-19 | <<locked>> | 94% | 44,034 psi | 71% | 2434 fps | 95.7% |
| Alliant Reloder-22 | <<locked>> | 98% | 43,598 psi | 70% | 2474 fps | 95.8% |
| Alliant Reloder-23 | <<locked>> | 82% | 25,324 psi | 41% | 2054 fps | 95.3% |
| Alliant Reloder-25 | <<locked>> | 94% | 32,155 psi | 52% | 2247 fps | 95% |
| Alliant Reloder-26 | <<locked>> | 86% | 30,487 psi | 49% | 2251 fps | 95.3% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 48,776 psi | 78% | 2461 fps | 99.8% |
| Bofors RP3 | <<locked>> | 80% | 41,959 psi | 67% | 2346 fps | 100% |
| Bofors RP5 | <<locked>> | 98% | 43,598 psi | 70% | 2474 fps | 95.8% |
| Bofors RP7 | <<locked>> | 82% | 39,813 psi | 64% | 2277 fps | 95.6% |
| Hodgdon Benchmark | <<locked>> | 80% | 53,011 psi | 85% | 2428 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 50,807 psi | 81% | 2470 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 42,583 psi | 68% | 2352 fps | 98.9% |
| Hodgdon H414 | <<locked>> | 82% | 37,260 psi | 60% | 2306 fps | 95.6% |
| Hodgdon H4350 | <<locked>> | 82% | 40,495 psi | 65% | 2323 fps | 95% |
| Hodgdon H4895 | <<locked>> | 80% | 49,879 psi | 80% | 2454 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 30,139 psi | 48% | 2133 fps | 97.8% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 46,238 psi | 74% | 2441 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 39,001 psi | 63% | 2365 fps | 95.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,963 psi | 43% | 1365 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 47,718 psi | 77% | 2408 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 50,067 psi | 80% | 2434 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 44,164 psi | 71% | 2346 fps | 99.7% |
| IMR 4166 Enduron | <<locked>> | 80% | 46,354 psi | 74% | 2365 fps | 97.8% |
| IMR 4350 | <<locked>> | 84% | 37,710 psi | 60% | 2260 fps | 95% |
| IMR 4451 Enduron | <<locked>> | 80% | 38,812 psi | 62% | 2257 fps | 95.8% |
| IMR 4831 | <<locked>> | 80% | 31,647 psi | 51% | 2172 fps | 96.7% |
| IMR 4895 | <<locked>> | 80% | 46,108 psi | 74% | 2421 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 98% | 50,444 psi | 81% | 2480 fps | 95.3% |
| IMR 8208 XBR | <<locked>> | 80% | 51,459 psi | 83% | 2444 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 49,153 psi | 79% | 2425 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 48,863 psi | 78% | 2382 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 44,237 psi | 71% | 2346 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 36,434 psi | 58% | 2218 fps | 96.7% |
| Lovex S070 | <<locked>> | 82% | 36,912 psi | 59% | 2244 fps | 95.6% |
| Lovex S071 | <<locked>> | 96% | 34,055 psi | 55% | 2234 fps | 95.6% |
| Norma 201 | <<locked>> | 80% | 48,327 psi | 77% | 2398 fps | 100% |
| Norma 202 | <<locked>> | 80% | 48,834 psi | 78% | 2398 fps | 100% |
| Norma 203B | <<locked>> | 80% | 44,338 psi | 71% | 2385 fps | 99.9% |
| Norma 204 | <<locked>> | 88% | 42,409 psi | 68% | 2385 fps | 95% |
| Norma MRP | <<locked>> | 92% | 37,594 psi | 60% | 2385 fps | 95.4% |
| Norma URP | <<locked>> | 80% | 32,880 psi | 53% | 2211 fps | 96.9% |
| Ramshot Big Game | <<locked>> | 80% | 44,164 psi | 71% | 2405 fps | 99.8% |
| Ramshot Hunter | <<locked>> | 82% | 34,069 psi | 55% | 2244 fps | 95.4% |
| Ramshot TAC | <<locked>> | 80% | 51,271 psi | 82% | 2464 fps | 99.5% |
| Ramshot Wild Boar | <<locked>> | 80% | 51,242 psi | 82% | 2480 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,296 psi | 44% | 1394 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 42,728 psi | 69% | 2339 fps | 97.6% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 48,022 psi | 77% | 2497 fps | 99.9% |
| ReloadSwiss RS 60 | 57.8 gr | 80% | 38,783 psi | 62% | 2385 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 32,271 psi | 52% | 2224 fps | 96.5% |
| ReloadSwiss RS 70 | 58.7 gr | 80% | 32,053 psi | 51% | 2228 fps | 95.5% |
| Rottweil R 901 | <<locked>> | 80% | 52,605 psi | 84% | 2421 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 46,021 psi | 74% | 2356 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 39,523 psi | 63% | 2300 fps | 99.8% |
| Rottweil R 904 | <<locked>> | 96% | 49,240 psi | 79% | 2467 fps | 95.7% |
| Rottweil R 905 | <<locked>> | 94% | 42,801 psi | 69% | 2418 fps | 95.6% |
| Rottweil R 907 | <<locked>> | 82% | 39,813 psi | 64% | 2277 fps | 95.6% |
| Shooters World Long Rifle | <<locked>> | 80% | 36,434 psi | 58% | 2218 fps | 96.7% |
| Shooters World Match Rifle | <<locked>> | 80% | 49,153 psi | 79% | 2425 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 44,237 psi | 71% | 2346 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 36,912 psi | 59% | 2244 fps | 95.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 40,466 psi | 65% | 2346 fps | 99.5% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 49,893 psi | 80% | 2444 fps | 99.6% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 47,819 psi | 77% | 2421 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 49,429 psi | 79% | 2339 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 41,510 psi | 67% | 2228 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 37,942 psi | 61% | 2211 fps | 95.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 42,395 psi | 68% | 2415 fps | 95.5% |
| Somchem S335 | <<locked>> | 80% | 49,110 psi | 79% | 2343 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 49,647 psi | 80% | 2438 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 40,118 psi | 64% | 2300 fps | 99.7% |
| Somchem S361 | <<locked>> | 96% | 50,531 psi | 81% | 2461 fps | 95% |
| Somchem S365 | <<locked>> | 80% | 29,530 psi | 47% | 2172 fps | 98.9% |
| Somchem S385 | <<locked>> | 90% | 38,203 psi | 61% | 2306 fps | 95.1% |
| Vihtavuori N133 | <<locked>> | 80% | 49,879 psi | 80% | 2326 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 45,963 psi | 74% | 2326 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 46,267 psi | 74% | 2339 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 38,247 psi | 61% | 2241 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 34,258 psi | 55% | 2211 fps | 97.3% |
| Vihtavuori N165 | <<locked>> | 96% | 39,871 psi | 64% | 2326 fps | 95.1% |
| Vihtavuori N530 | <<locked>> | 80% | 51,721 psi | 83% | 2441 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 44,599 psi | 72% | 2336 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 33,721 psi | 54% | 2211 fps | 96.9% |
| Vihtavuori N555 | <<locked>> | 82% | 27,253 psi | 44% | 2119 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 33,678 psi | 54% | 2188 fps | 99% |
| Winchester 748 | <<locked>> | 80% | 51,982 psi | 83% | 2487 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 37,260 psi | 60% | 2306 fps | 95.6% |
| Winchester StaBALL HD | <<locked>> | 86% | 25,222 psi | 40% | 2123 fps | 95.7% |
| Winchester StaBALL Match | <<locked>> | 80% | 47,514 psi | 76% | 2428 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 43,018 psi | 69% | 2388 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 105 powders for .338 Win Mag. loaded with the .338 | 250gr | Woodleigh PP SN. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,654 fps; across all powders the maximum-charge window runs from 1,529 fps to 2,654 fps. Accurate 3100 gives the best case fill at 100 %, and 105 of the 105 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 1:16.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2209, Alliant Reloder-19 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 60, ReloadSwiss RS 70, Alliant Reloder-16 rank at the top here: for .338 Win Mag. with the .338 | 250gr | Woodleigh PP SN 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.