Load Specifications
Bullet Manufacturer:Prvi Partizan
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:1:12.5
Load data in caliber .338 Win Mag. with .338 | 250gr | Prvi Partizan HPBT 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% | 54,128 psi | 87% | 2382 fps | 100% |
| Accurate 2495 | <<locked>> | 86% | 52,968 psi | 85% | 2408 fps | 100% |
| Accurate 2520 | <<locked>> | 82% | 54,288 psi | 87% | 2467 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 55,172 psi | 88% | 2464 fps | 98.2% |
| Accurate 3100ᴾ | <<locked>> | 100% | 43,120 psi | 69% | 2385 fps | 97.8% |
| Accurate 4064 | <<locked>> | 88% | 53,142 psi | 85% | 2454 fps | 100% |
| Accurate 4350 | <<locked>> | 98% | 56,217 psi | 90% | 2585 fps | 100% |
| ADI AR 2206H | <<locked>> | 84% | 53,098 psi | 85% | 2480 fps | 100% |
| ADI AR 2208 | <<locked>> | 90% | 54,143 psi | 87% | 2484 fps | 100% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 50,981 psi | 82% | 2520 fps | 96.7% |
| ADI Benchmark 8208 | <<locked>> | 84% | 55,448 psi | 89% | 2477 fps | 100% |
| Alliant AR-Comp | <<locked>> | 82% | 53,214 psi | 85% | 2405 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 88% | 56,405 psi | 90% | 2641 fps | 100% |
| Alliant Power Pro Varmintᴾ | <<locked>> | 100% | 50,502 psi | 81% | 2516 fps | 96.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 90% | 54,375 psi | 87% | 2503 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 88% | 54,679 psi | 88% | 2523 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 98% | 53,867 psi | 86% | 2589 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 94% | 54,853 psi | 88% | 2618 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 49,821 psi | 80% | 2510 fps | 96.7% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 41,060 psi | 66% | 2411 fps | 99.8% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 36,318 psi | 58% | 2326 fps | 96.3% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 45,992 psi | 74% | 2566 fps | 99.5% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 56,376 psi | 90% | 2546 fps | 100% |
| Bofors RP3 | <<locked>> | 90% | 54,940 psi | 88% | 2516 fps | 100% |
| Bofors RP7 | <<locked>> | 94% | 54,795 psi | 88% | 2497 fps | 98.4% |
| Hodgdon Benchmark | <<locked>> | 82% | 53,722 psi | 86% | 2415 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 84% | 54,940 psi | 88% | 2507 fps | 100% |
| Hodgdon H380 | <<locked>> | 90% | 55,695 psi | 89% | 2533 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 96% | 55,419 psi | 89% | 2585 fps | 99% |
| Hodgdon H4350 | <<locked>> | 94% | 55,927 psi | 90% | 2549 fps | 98.1% |
| Hodgdon H4895 | <<locked>> | 84% | 53,679 psi | 86% | 2487 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 53,548 psi | 86% | 2516 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 53,040 psi | 85% | 2520 fps | 100% |
| Hodgdon Superformance | <<locked>> | 96% | 55,680 psi | 89% | 2621 fps | 98.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,781 psi | 57% | 1503 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 54,694 psi | 88% | 2487 fps | 100% |
| IMR 3031 | <<locked>> | 84% | 53,969 psi | 87% | 2467 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 53,592 psi | 86% | 2464 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 86% | 53,505 psi | 86% | 2451 fps | 98.6% |
| IMR 4350 | <<locked>> | 98% | 55,056 psi | 88% | 2523 fps | 98.5% |
| IMR 4451 Enduron | <<locked>> | 92% | 53,287 psi | 85% | 2477 fps | 98.5% |
| IMR 4831 | <<locked>> | 98% | 53,084 psi | 85% | 2530 fps | 99.9% |
| IMR 4895 | <<locked>> | 88% | 56,086 psi | 90% | 2546 fps | 100% |
| IMR 8208 XBR | <<locked>> | 84% | 55,448 psi | 89% | 2477 fps | 100% |
| Lovex D073.6 | <<locked>> | 86% | 56,434 psi | 90% | 2500 fps | 100% |
| Lovex S060 | <<locked>> | 86% | 55,898 psi | 90% | 2457 fps | 100% |
| Lovex S062 | <<locked>> | 88% | 53,708 psi | 86% | 2464 fps | 100% |
| Lovex S065 | <<locked>> | 96% | 56,144 psi | 90% | 2516 fps | 99.6% |
| Lovex S070 | <<locked>> | 96% | 53,519 psi | 86% | 2503 fps | 98.8% |
| Lovex S071ᴾ | <<locked>> | 100% | 35,926 psi | 58% | 2257 fps | 95.9% |
| Norma 201 | <<locked>> | 86% | 55,288 psi | 89% | 2474 fps | 100% |
| Norma 202 | <<locked>> | 86% | 55,854 psi | 90% | 2470 fps | 100% |
| Norma 203B | <<locked>> | 88% | 53,925 psi | 86% | 2510 fps | 100% |
| Norma 204 | <<locked>> | 98% | 55,637 psi | 89% | 2569 fps | 97.5% |
| Norma MRPᴾ | <<locked>> | 100% | 45,963 psi | 74% | 2526 fps | 97.5% |
| Norma URP | <<locked>> | 98% | 55,056 psi | 88% | 2572 fps | 100% |
| Ramshot Big Game | <<locked>> | 88% | 54,563 psi | 87% | 2536 fps | 100% |
| Ramshot Hunter | <<locked>> | 98% | 53,780 psi | 86% | 2572 fps | 99.4% |
| Ramshot TAC | <<locked>> | 84% | 55,579 psi | 89% | 2503 fps | 99.7% |
| Ramshot Wild Boar | <<locked>> | 84% | 55,448 psi | 89% | 2516 fps | 100% |
| Ramshot X-Terminator | <<locked>> | 82% | 56,130 psi | 90% | 2480 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,260 psi | 58% | 1535 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 55,912 psi | 90% | 2516 fps | 99.3% |
| ReloadSwiss RS 52 | <<locked>> | 86% | 55,216 psi | 89% | 2582 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 92% | 54,810 psi | 88% | 2615 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 55,927 psi | 90% | 2608 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 98% | 55,230 psi | 89% | 2635 fps | 99.9% |
| Rottweil R 901 | <<locked>> | 84% | 56,376 psi | 90% | 2451 fps | 100% |
| Rottweil R 902 | <<locked>> | 88% | 55,883 psi | 90% | 2474 fps | 100% |
| Rottweil R 903 | <<locked>> | 92% | 54,824 psi | 88% | 2513 fps | 100% |
| Rottweil R 904ᴾ | <<locked>> | 100% | 52,649 psi | 84% | 2493 fps | 95.9% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 48,472 psi | 78% | 2490 fps | 96.6% |
| Rottweil R 907 | <<locked>> | 94% | 54,795 psi | 88% | 2497 fps | 98.4% |
| Shooters World Long Rifle | <<locked>> | 96% | 56,144 psi | 90% | 2516 fps | 99.6% |
| Shooters World Match Rifle | <<locked>> | 86% | 56,434 psi | 90% | 2500 fps | 100% |
| Shooters World Precision | <<locked>> | 88% | 53,708 psi | 86% | 2464 fps | 100% |
| Shooters World SW4350 | <<locked>> | 96% | 53,519 psi | 86% | 2503 fps | 98.8% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 52,765 psi | 85% | 2520 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 54,172 psi | 87% | 2484 fps | 99.8% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 54,810 psi | 88% | 2500 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 53,490 psi | 86% | 2372 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 53,476 psi | 86% | 2372 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 52,895 psi | 85% | 2431 fps | 98.5% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 48,037 psi | 77% | 2487 fps | 96.5% |
| Somchem S335 | <<locked>> | 86% | 56,028 psi | 90% | 2411 fps | 100% |
| Somchem S341 | <<locked>> | 84% | 53,795 psi | 86% | 2474 fps | 100% |
| Somchem S355 | <<locked>> | 92% | 54,969 psi | 88% | 2507 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 53,272 psi | 85% | 2575 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 49,211 psi | 79% | 2474 fps | 97.5% |
| Vihtavuori N130 | <<locked>> | 82% | 56,376 psi | 90% | 2372 fps | 100% |
| Vihtavuori N133 | <<locked>> | 84% | 53,838 psi | 86% | 2359 fps | 100% |
| Vihtavuori N135 | <<locked>> | 88% | 55,724 psi | 89% | 2434 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 56,362 psi | 90% | 2451 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 52,982 psi | 85% | 2444 fps | 100% |
| Vihtavuori N160 | <<locked>> | 96% | 54,027 psi | 87% | 2520 fps | 99.9% |
| Vihtavuori N530 | <<locked>> | 84% | 55,927 psi | 90% | 2477 fps | 100% |
| Vihtavuori N540 | <<locked>> | 88% | 54,520 psi | 87% | 2454 fps | 100% |
| Vihtavuori N550 | <<locked>> | 96% | 53,113 psi | 85% | 2530 fps | 99.8% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 45,513 psi | 73% | 2480 fps | 99.8% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 54,070 psi | 87% | 2503 fps | 100% |
| Winchester 748 | <<locked>> | 84% | 56,159 psi | 90% | 2523 fps | 100% |
| Winchester 760 | <<locked>> | 96% | 55,419 psi | 89% | 2585 fps | 99% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 36,695 psi | 59% | 2431 fps | 99.9% |
| Winchester StaBALL Match | <<locked>> | 86% | 54,911 psi | 88% | 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% | 51,010 psi | 82% | 2343 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 43,729 psi | 70% | 2287 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 50,937 psi | 82% | 2421 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 42,627 psi | 68% | 2274 fps | 95.7% |
| Accurate 3100 | <<locked>> | 94% | 35,186 psi | 56% | 2241 fps | 95.6% |
| Accurate 4064 | <<locked>> | 80% | 41,394 psi | 66% | 2290 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 30,443 psi | 49% | 2146 fps | 95.8% |
| ADI AR 2206H | <<locked>> | 80% | 46,876 psi | 75% | 2388 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 80% | 39,958 psi | 64% | 2260 fps | 98.9% |
| ADI AR 2209 | <<locked>> | 96% | 44,846 psi | 72% | 2418 fps | 95.2% |
| ADI Benchmark 8208 | <<locked>> | 80% | 48,950 psi | 78% | 2388 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 49,777 psi | 80% | 2365 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 42,786 psi | 69% | 2431 fps | 99.4% |
| Alliant Power Pro Varmint | <<locked>> | 96% | 44,556 psi | 71% | 2418 fps | 95.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 39,827 psi | 64% | 2283 fps | 99.7% |
| Alliant Reloder-15 | <<locked>> | 80% | 42,569 psi | 68% | 2339 fps | 99.4% |
| Alliant Reloder-16 | <<locked>> | 80% | 30,951 psi | 50% | 2159 fps | 96% |
| Alliant Reloder-17 | 54.6 gr | 80% | 34,374 psi | 55% | 2270 fps | 98.8% |
| Alliant Reloder-19 | <<locked>> | 96% | 43,961 psi | 70% | 2411 fps | 95.2% |
| Alliant Reloder-23 | <<locked>> | 86% | 26,832 psi | 43% | 2083 fps | 95.7% |
| Alliant Reloder-25 | <<locked>> | 98% | 34,156 psi | 55% | 2274 fps | 95.4% |
| Alliant Reloder-26 | <<locked>> | 90% | 32,518 psi | 52% | 2287 fps | 95.8% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 46,224 psi | 74% | 2398 fps | 99.5% |
| Bofors RP3 | <<locked>> | 80% | 39,552 psi | 63% | 2290 fps | 99.8% |
| Bofors RP7 | <<locked>> | 84% | 40,263 psi | 65% | 2264 fps | 95.3% |
| Hodgdon Benchmark | <<locked>> | 80% | 50,531 psi | 81% | 2372 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 48,051 psi | 77% | 2415 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 40,321 psi | 65% | 2297 fps | 98.2% |
| Hodgdon H414 | <<locked>> | 84% | 37,231 psi | 60% | 2287 fps | 95.2% |
| Hodgdon H4350 | <<locked>> | 86% | 43,381 psi | 70% | 2356 fps | 95.4% |
| Hodgdon H4895 | <<locked>> | 80% | 47,369 psi | 76% | 2398 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 28,340 psi | 45% | 2070 fps | 96.8% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 43,395 psi | 70% | 2379 fps | 100% |
| Hodgdon Superformance | 62 gr | 86% | 39,218 psi | 63% | 2349 fps | 95.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,643 psi | 43% | 1339 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 45,527 psi | 73% | 2356 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 47,500 psi | 76% | 2385 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 41,945 psi | 67% | 2290 fps | 99.3% |
| IMR 4166 Enduron | <<locked>> | 80% | 44,266 psi | 71% | 2310 fps | 97% |
| IMR 4350 | <<locked>> | 88% | 40,408 psi | 65% | 2290 fps | 95.4% |
| IMR 4451 Enduron | <<locked>> | 82% | 39,378 psi | 63% | 2247 fps | 95.6% |
| IMR 4831 | <<locked>> | 80% | 29,718 psi | 48% | 2113 fps | 95.5% |
| IMR 4895 | <<locked>> | 80% | 43,642 psi | 70% | 2365 fps | 99.8% |
| IMR 8208 XBR | <<locked>> | 80% | 48,950 psi | 78% | 2388 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 46,369 psi | 74% | 2369 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 46,702 psi | 75% | 2326 fps | 99.9% |
| Lovex S062 | <<locked>> | 80% | 41,959 psi | 67% | 2290 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 34,519 psi | 55% | 2159 fps | 95.6% |
| Lovex S070 | <<locked>> | 84% | 36,999 psi | 59% | 2228 fps | 95.2% |
| Lovex S071 | <<locked>> | 98% | 33,736 psi | 54% | 2211 fps | 95.1% |
| Norma 201 | <<locked>> | 80% | 46,021 psi | 74% | 2343 fps | 100% |
| Norma 202 | <<locked>> | 80% | 46,427 psi | 74% | 2346 fps | 100% |
| Norma 203B | <<locked>> | 80% | 41,945 psi | 67% | 2326 fps | 99.6% |
| Norma 204 | <<locked>> | 92% | 45,600 psi | 73% | 2418 fps | 95.4% |
| Norma MRP | <<locked>> | 96% | 40,089 psi | 64% | 2418 fps | 95.8% |
| Norma URP | <<locked>> | 80% | 30,966 psi | 50% | 2152 fps | 95.8% |
| Ramshot Big Game | <<locked>> | 80% | 41,553 psi | 67% | 2343 fps | 99.5% |
| Ramshot Hunter | <<locked>> | 84% | 34,243 psi | 55% | 2231 fps | 95% |
| Ramshot TAC | <<locked>> | 80% | 48,863 psi | 78% | 2405 fps | 99.1% |
| Ramshot Wild Boar | <<locked>> | 80% | 48,559 psi | 78% | 2421 fps | 100% |
| Ramshot X-Terminator | <<locked>> | 80% | 52,649 psi | 84% | 2434 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,166 psi | 44% | 1375 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 40,524 psi | 65% | 2277 fps | 96.7% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 45,107 psi | 72% | 2434 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 36,579 psi | 59% | 2323 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 30,182 psi | 48% | 2159 fps | 95.2% |
| ReloadSwiss RS 70 | 56.8 gr | 82% | 32,285 psi | 52% | 2211 fps | 95.1% |
| Rottweil R 901 | <<locked>> | 80% | 50,038 psi | 80% | 2369 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 43,918 psi | 70% | 2303 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 37,289 psi | 60% | 2241 fps | 99.4% |
| Rottweil R 904 | <<locked>> | 98% | 49,385 psi | 79% | 2448 fps | 95.2% |
| Rottweil R 905 | <<locked>> | 96% | 42,772 psi | 69% | 2398 fps | 95.1% |
| Rottweil R 907 | <<locked>> | 84% | 40,263 psi | 65% | 2264 fps | 95.3% |
| Shooters World Long Rifle | <<locked>> | 80% | 34,519 psi | 55% | 2159 fps | 95.6% |
| Shooters World Match Rifle | <<locked>> | 80% | 46,369 psi | 74% | 2369 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 41,959 psi | 67% | 2290 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 36,999 psi | 59% | 2228 fps | 95.2% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 38,043 psi | 61% | 2283 fps | 99% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 47,268 psi | 76% | 2385 fps | 99.2% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 45,339 psi | 73% | 2362 fps | 99.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 47,268 psi | 76% | 2290 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 39,479 psi | 63% | 2178 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 38,218 psi | 61% | 2198 fps | 95.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 42,395 psi | 68% | 2392 fps | 95% |
| Somchem S335 | <<locked>> | 80% | 46,905 psi | 75% | 2293 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 47,065 psi | 75% | 2379 fps | 99.9% |
| Somchem S355 | <<locked>> | 80% | 37,971 psi | 61% | 2244 fps | 99.3% |
| Somchem S365 | <<locked>> | 80% | 27,644 psi | 44% | 2110 fps | 98% |
| Somchem S385 | <<locked>> | 94% | 40,582 psi | 65% | 2333 fps | 95.5% |
| Vihtavuori N130 | <<locked>> | 80% | 53,171 psi | 85% | 2333 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 47,645 psi | 76% | 2280 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 43,526 psi | 70% | 2277 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 44,048 psi | 71% | 2290 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 36,187 psi | 58% | 2188 fps | 99.7% |
| Vihtavuori N160 | <<locked>> | 80% | 32,155 psi | 52% | 2149 fps | 96.2% |
| Vihtavuori N530 | <<locked>> | 80% | 49,240 psi | 79% | 2388 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 42,395 psi | 68% | 2287 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 31,763 psi | 51% | 2152 fps | 95.8% |
| Vihtavuori N555 | <<locked>> | 86% | 28,776 psi | 46% | 2149 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 31,865 psi | 51% | 2129 fps | 98.2% |
| Winchester 748 | <<locked>> | 80% | 49,182 psi | 79% | 2431 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 37,420 psi | 60% | 2290 fps | 95.2% |
| Winchester StaBALL HD | <<locked>> | 90% | 26,745 psi | 43% | 2156 fps | 96.2% |
| Winchester StaBALL Match | <<locked>> | 80% | 45,078 psi | 72% | 2372 fps | 100% |
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 104 powders for .338 Win Mag. loaded with the .338 | 250gr | Prvi Partizan HPBT. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,641 fps; across all powders the maximum-charge window runs from 1,503 fps to 2,641 fps. Accurate 3100 gives the best case fill at 100 %, and 104 of the 104 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 1:12.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2209, Alliant Power Pro Varmint 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 | Prvi Partizan HPBT 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.