Load Specifications
Bullet Manufacturer:Rhino Bullets
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:1:13.0
Load data in caliber .338 Win Mag. with .338 | 250gr | Rhino Penetrator bullet and 102 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 Winchester 760.
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% | 53,316 psi | 85% | 2365 fps | 100% |
| Accurate 2495 | <<locked>> | 88% | 55,448 psi | 89% | 2431 fps | 100% |
| Accurate 2520 | <<locked>> | 82% | 53,606 psi | 86% | 2451 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 54,389 psi | 87% | 2444 fps | 98% |
| Accurate 3100ᴾ | <<locked>> | 100% | 42,424 psi | 68% | 2369 fps | 97.5% |
| Accurate 4064 | <<locked>> | 90% | 55,579 psi | 89% | 2477 fps | 100% |
| Accurate 4350 | <<locked>> | 98% | 55,303 psi | 89% | 2566 fps | 100% |
| ADI AR 2206H | <<locked>> | 86% | 55,854 psi | 90% | 2510 fps | 100% |
| ADI AR 2208 | <<locked>> | 90% | 53,548 psi | 86% | 2467 fps | 100% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 50,111 psi | 80% | 2497 fps | 96.4% |
| ADI Benchmark 8208 | <<locked>> | 84% | 54,737 psi | 88% | 2461 fps | 100% |
| Alliant AR-Comp | <<locked>> | 84% | 56,028 psi | 90% | 2431 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 88% | 55,274 psi | 89% | 2618 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 90% | 53,476 psi | 86% | 2484 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 88% | 54,070 psi | 87% | 2507 fps | 100% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 56,318 psi | 90% | 2615 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 94% | 54,114 psi | 87% | 2598 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 49,168 psi | 79% | 2490 fps | 96.4% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 40,466 psi | 65% | 2395 fps | 99.7% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 45,136 psi | 72% | 2543 fps | 99.3% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 55,564 psi | 89% | 2526 fps | 100% |
| Bofors RP3 | <<locked>> | 90% | 54,041 psi | 87% | 2500 fps | 100% |
| Bofors RP7 | <<locked>> | 94% | 54,027 psi | 87% | 2477 fps | 98.2% |
| Hodgdon Benchmark | <<locked>> | 82% | 53,084 psi | 85% | 2402 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 84% | 54,012 psi | 87% | 2490 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 82% | 56,246 psi | 90% | 2582 fps | 100% |
| Hodgdon H380 | <<locked>> | 90% | 54,839 psi | 88% | 2513 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 96% | 54,375 psi | 87% | 2566 fps | 98.8% |
| Hodgdon H4350 | <<locked>> | 94% | 55,187 psi | 88% | 2530 fps | 97.8% |
| Hodgdon H4895 | <<locked>> | 86% | 56,405 psi | 90% | 2516 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 52,721 psi | 85% | 2503 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 88% | 55,912 psi | 90% | 2549 fps | 100% |
| Hodgdon Superformance | <<locked>> | 96% | 54,882 psi | 88% | 2602 fps | 98.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,781 psi | 57% | 1496 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 54,085 psi | 87% | 2474 fps | 100% |
| IMR 3031 | <<locked>> | 84% | 53,127 psi | 85% | 2451 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 56,434 psi | 90% | 2493 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 88% | 56,086 psi | 90% | 2480 fps | 98.9% |
| IMR 4350 | <<locked>> | 98% | 54,114 psi | 87% | 2503 fps | 98.2% |
| IMR 4451 Enduron | <<locked>> | 94% | 55,883 psi | 90% | 2503 fps | 98.8% |
| IMR 4831ᴾ | <<locked>> | 100% | 55,550 psi | 89% | 2556 fps | 100% |
| IMR 4895 | <<locked>> | 88% | 55,463 psi | 89% | 2530 fps | 100% |
| IMR 8208 XBR | <<locked>> | 84% | 54,737 psi | 88% | 2461 fps | 100% |
| Lovex D073.6 | <<locked>> | 86% | 55,753 psi | 89% | 2487 fps | 100% |
| Lovex S060 | <<locked>> | 86% | 55,245 psi | 89% | 2441 fps | 100% |
| Lovex S062 | <<locked>> | 90% | 56,188 psi | 90% | 2490 fps | 100% |
| Lovex S065 | <<locked>> | 96% | 55,390 psi | 89% | 2500 fps | 99.5% |
| Lovex S070 | <<locked>> | 98% | 56,202 psi | 90% | 2533 fps | 99.1% |
| Norma 201 | <<locked>> | 86% | 54,592 psi | 88% | 2457 fps | 100% |
| Norma 202 | <<locked>> | 86% | 55,143 psi | 88% | 2457 fps | 100% |
| Norma 203B | <<locked>> | 88% | 53,287 psi | 85% | 2493 fps | 100% |
| Norma 204 | <<locked>> | 98% | 54,679 psi | 88% | 2549 fps | 97.2% |
| Norma MRPᴾ | <<locked>> | 100% | 44,933 psi | 72% | 2500 fps | 97.1% |
| Norma URP | <<locked>> | 98% | 54,215 psi | 87% | 2552 fps | 99.9% |
| Ramshot Big Game | <<locked>> | 88% | 53,476 psi | 86% | 2516 fps | 100% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 56,362 psi | 90% | 2598 fps | 99.5% |
| Ramshot TAC | <<locked>> | 84% | 54,853 psi | 88% | 2484 fps | 99.6% |
| Ramshot Wild Boar | <<locked>> | 84% | 54,578 psi | 88% | 2497 fps | 100% |
| Ramshot X-Terminator | <<locked>> | 82% | 55,535 psi | 89% | 2464 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,260 psi | 58% | 1529 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 55,158 psi | 88% | 2500 fps | 99.2% |
| ReloadSwiss RS 52 | <<locked>> | 86% | 54,505 psi | 87% | 2562 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 92% | 53,679 psi | 86% | 2595 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 54,882 psi | 88% | 2589 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 98% | 54,360 psi | 87% | 2615 fps | 99.9% |
| Rottweil R 901 | <<locked>> | 84% | 55,593 psi | 89% | 2434 fps | 100% |
| Rottweil R 902 | <<locked>> | 88% | 55,245 psi | 89% | 2457 fps | 100% |
| Rottweil R 903 | <<locked>> | 92% | 53,896 psi | 86% | 2493 fps | 100% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 47,819 psi | 77% | 2474 fps | 96.3% |
| Rottweil R 907 | <<locked>> | 94% | 54,027 psi | 87% | 2477 fps | 98.2% |
| Shooters World Long Rifle | <<locked>> | 96% | 55,390 psi | 89% | 2500 fps | 99.5% |
| Shooters World Match Rifle | <<locked>> | 86% | 55,753 psi | 89% | 2487 fps | 100% |
| Shooters World Precision | <<locked>> | 90% | 56,188 psi | 90% | 2490 fps | 100% |
| Shooters World SW4350 | <<locked>> | 98% | 56,202 psi | 90% | 2533 fps | 99.1% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 55,637 psi | 89% | 2549 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 53,301 psi | 85% | 2464 fps | 99.7% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 54,186 psi | 87% | 2484 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 56,028 psi | 90% | 2398 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 56,115 psi | 90% | 2395 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 55,390 psi | 89% | 2457 fps | 98.7% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 47,369 psi | 76% | 2470 fps | 96.2% |
| Somchem S321 | <<locked>> | 82% | 55,854 psi | 90% | 2490 fps | 100% |
| Somchem S335 | <<locked>> | 86% | 55,405 psi | 89% | 2398 fps | 100% |
| Somchem S341 | <<locked>> | 84% | 52,982 psi | 85% | 2457 fps | 100% |
| Somchem S355 | <<locked>> | 92% | 54,346 psi | 87% | 2490 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 52,112 psi | 84% | 2552 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 48,544 psi | 78% | 2457 fps | 97.3% |
| Vihtavuori N130 | <<locked>> | 82% | 55,869 psi | 90% | 2359 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 56,304 psi | 90% | 2382 fps | 100% |
| Vihtavuori N135 | <<locked>> | 88% | 54,926 psi | 88% | 2418 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 55,695 psi | 89% | 2438 fps | 100% |
| Vihtavuori N150 | <<locked>> | 94% | 55,666 psi | 89% | 2470 fps | 100% |
| Vihtavuori N160 | <<locked>> | 96% | 53,243 psi | 85% | 2503 fps | 99.9% |
| Vihtavuori N530 | <<locked>> | 84% | 55,216 psi | 89% | 2461 fps | 100% |
| Vihtavuori N540 | <<locked>> | 88% | 53,722 psi | 86% | 2438 fps | 100% |
| Vihtavuori N550 | <<locked>> | 98% | 55,550 psi | 89% | 2556 fps | 99.9% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 44,454 psi | 71% | 2457 fps | 99.6% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 53,229 psi | 85% | 2484 fps | 100% |
| Winchester 748 | <<locked>> | 84% | 55,187 psi | 88% | 2503 fps | 100% |
| Winchester 760 | <<locked>> | 96% | 54,650 psi | 88% | 2569 fps | 98.9% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 36,042 psi | 58% | 2408 fps | 99.8% |
| Winchester StaBALL Match | <<locked>> | 86% | 54,027 psi | 87% | 2493 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% | 50,227 psi | 81% | 2326 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 42,931 psi | 69% | 2270 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 50,024 psi | 80% | 2405 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 42,061 psi | 67% | 2254 fps | 95.4% |
| Accurate 3100 | <<locked>> | 94% | 34,519 psi | 55% | 2221 fps | 95.2% |
| Accurate 4064 | <<locked>> | 80% | 40,611 psi | 65% | 2270 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 29,820 psi | 48% | 2126 fps | 95.4% |
| ADI AR 2206H | <<locked>> | 80% | 46,224 psi | 74% | 2372 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 80% | 39,320 psi | 63% | 2241 fps | 98.7% |
| ADI AR 2209 | <<locked>> | 98% | 46,949 psi | 75% | 2448 fps | 95.6% |
| ADI Benchmark 8208 | <<locked>> | 80% | 48,269 psi | 77% | 2372 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 49,168 psi | 79% | 2352 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 42,221 psi | 68% | 2415 fps | 99.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 39,175 psi | 63% | 2264 fps | 99.6% |
| Alliant Reloder-15 | <<locked>> | 80% | 41,887 psi | 67% | 2320 fps | 99.2% |
| Alliant Reloder-16 | <<locked>> | 80% | 30,458 psi | 49% | 2139 fps | 95.6% |
| Alliant Reloder-17 | 53.8 gr | 80% | 33,881 psi | 54% | 2251 fps | 98.6% |
| Alliant Reloder-19 | <<locked>> | 98% | 46,151 psi | 74% | 2441 fps | 95.7% |
| Alliant Reloder-23 | <<locked>> | 86% | 26,426 psi | 42% | 2067 fps | 95.3% |
| Alliant Reloder-26 | <<locked>> | 90% | 31,966 psi | 51% | 2264 fps | 95.4% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 45,397 psi | 73% | 2379 fps | 99.4% |
| Bofors RP3 | <<locked>> | 80% | 38,870 psi | 62% | 2270 fps | 99.6% |
| Bofors RP7 | <<locked>> | 84% | 39,711 psi | 64% | 2247 fps | 95% |
| Hodgdon Benchmark | <<locked>> | 80% | 50,125 psi | 80% | 2359 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 47,369 psi | 76% | 2398 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 80% | 52,489 psi | 84% | 2533 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 39,697 psi | 64% | 2277 fps | 97.9% |
| Hodgdon H414 | <<locked>> | 86% | 39,175 psi | 63% | 2320 fps | 95.7% |
| Hodgdon H4350 | <<locked>> | 86% | 42,844 psi | 69% | 2339 fps | 95.1% |
| Hodgdon H4895 | <<locked>> | 80% | 46,659 psi | 75% | 2379 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 27,992 psi | 45% | 2057 fps | 96.5% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 42,743 psi | 69% | 2362 fps | 99.9% |
| Hodgdon Superformance | <<locked>> | 88% | 41,379 psi | 66% | 2382 fps | 95.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,716 psi | 43% | 1335 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 44,860 psi | 72% | 2339 fps | 99.9% |
| IMR 3031 | <<locked>> | 80% | 46,630 psi | 75% | 2365 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 41,307 psi | 66% | 2270 fps | 99.2% |
| IMR 4166 Enduron | <<locked>> | 80% | 43,714 psi | 70% | 2290 fps | 96.7% |
| IMR 4350 | <<locked>> | 88% | 39,900 psi | 64% | 2274 fps | 95.1% |
| IMR 4451 Enduron | <<locked>> | 82% | 38,812 psi | 62% | 2231 fps | 95.2% |
| IMR 4831 | <<locked>> | 80% | 29,167 psi | 47% | 2093 fps | 95.1% |
| IMR 4895 | <<locked>> | 80% | 42,931 psi | 69% | 2346 fps | 99.7% |
| IMR 8208 XBR | <<locked>> | 80% | 48,269 psi | 77% | 2372 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 45,658 psi | 73% | 2352 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 46,253 psi | 74% | 2313 fps | 99.9% |
| Lovex S062 | <<locked>> | 80% | 41,481 psi | 67% | 2277 fps | 99.9% |
| Lovex S065 | <<locked>> | 80% | 33,968 psi | 54% | 2139 fps | 95.3% |
| Lovex S070 | <<locked>> | 86% | 38,870 psi | 62% | 2257 fps | 95.7% |
| Norma 201 | <<locked>> | 80% | 45,324 psi | 73% | 2326 fps | 100% |
| Norma 202 | <<locked>> | 80% | 45,716 psi | 73% | 2329 fps | 100% |
| Norma 203B | <<locked>> | 80% | 41,292 psi | 66% | 2310 fps | 99.5% |
| Norma 204 | <<locked>> | 92% | 44,962 psi | 72% | 2398 fps | 95% |
| Norma MRP | <<locked>> | 96% | 39,523 psi | 63% | 2398 fps | 95.4% |
| Norma URP | <<locked>> | 80% | 30,414 psi | 49% | 2133 fps | 95.4% |
| Ramshot Big Game | <<locked>> | 80% | 40,944 psi | 66% | 2326 fps | 99.3% |
| Ramshot Hunter | <<locked>> | 86% | 35,998 psi | 58% | 2260 fps | 95.5% |
| Ramshot TAC | <<locked>> | 80% | 48,298 psi | 77% | 2388 fps | 98.9% |
| Ramshot Wild Boar | <<locked>> | 80% | 47,950 psi | 77% | 2408 fps | 99.9% |
| Ramshot X-Terminator | <<locked>> | 80% | 52,025 psi | 83% | 2418 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,035 psi | 43% | 1365 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 39,943 psi | 64% | 2260 fps | 96.4% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 44,382 psi | 71% | 2415 fps | 99.5% |
| ReloadSwiss RS 60 | 53.8 gr | 80% | 36,056 psi | 58% | 2306 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 31,676 psi | 51% | 2192 fps | 95.7% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 33,939 psi | 54% | 2244 fps | 95.7% |
| Rottweil R 901 | <<locked>> | 80% | 49,530 psi | 79% | 2356 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 43,236 psi | 69% | 2287 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 36,637 psi | 59% | 2224 fps | 99.2% |
| Rottweil R 905 | <<locked>> | 98% | 44,730 psi | 72% | 2425 fps | 95.5% |
| Rottweil R 907 | <<locked>> | 84% | 39,711 psi | 64% | 2247 fps | 95% |
| Shooters World Long Rifle | <<locked>> | 80% | 33,968 psi | 54% | 2139 fps | 95.3% |
| Shooters World Match Rifle | <<locked>> | 80% | 45,658 psi | 73% | 2352 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 41,481 psi | 67% | 2277 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 86% | 38,870 psi | 62% | 2257 fps | 95.7% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 37,449 psi | 60% | 2267 fps | 98.8% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 46,688 psi | 75% | 2369 fps | 99% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 44,715 psi | 72% | 2346 fps | 99.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 46,760 psi | 75% | 2277 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 39,044 psi | 63% | 2165 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 37,666 psi | 60% | 2182 fps | 95.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 44,324 psi | 71% | 2418 fps | 95.4% |
| Somchem S321 | <<locked>> | 80% | 52,214 psi | 84% | 2444 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 46,209 psi | 74% | 2277 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 46,267 psi | 74% | 2362 fps | 99.8% |
| Somchem S355 | <<locked>> | 80% | 37,333 psi | 60% | 2224 fps | 99.2% |
| Somchem S365 | <<locked>> | 80% | 27,282 psi | 44% | 2093 fps | 97.7% |
| Somchem S385 | <<locked>> | 94% | 39,943 psi | 64% | 2316 fps | 95.1% |
| Vihtavuori N130 | <<locked>> | 80% | 52,649 psi | 84% | 2320 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 47,137 psi | 76% | 2267 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 42,960 psi | 69% | 2264 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 43,352 psi | 70% | 2274 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 35,578 psi | 57% | 2169 fps | 99.6% |
| Vihtavuori N160 | <<locked>> | 80% | 31,604 psi | 51% | 2133 fps | 95.8% |
| Vihtavuori N530 | <<locked>> | 80% | 48,530 psi | 78% | 2372 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 41,785 psi | 67% | 2270 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 31,227 psi | 50% | 2136 fps | 95.5% |
| Vihtavuori N555 | <<locked>> | 86% | 28,253 psi | 45% | 2129 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 31,314 psi | 50% | 2110 fps | 97.9% |
| Winchester 748 | <<locked>> | 80% | 48,240 psi | 77% | 2411 fps | 100% |
| Winchester 760 | 56.6 gr | 86% | 39,349 psi | 63% | 2323 fps | 95.7% |
| Winchester StaBALL HD | <<locked>> | 90% | 26,295 psi | 42% | 2129 fps | 95.6% |
| Winchester StaBALL Match | <<locked>> | 80% | 44,237 psi | 71% | 2352 fps | 99.9% |
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 102 powders for .338 Win Mag. loaded with the .338 | 250gr | Rhino Penetrator. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,618 fps; across all powders the maximum-charge window runs from 1,496 fps to 2,618 fps. Accurate 3100 gives the best case fill at 100 %, and 102 of the 102 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 1:13.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2209, 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, Winchester 760 rank at the top here: for .338 Win Mag. with the .338 | 250gr | Rhino Penetrator 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.