Load Specifications
Bullet Manufacturer:Nosler
Bullet Weight:250 gr
Bullet Diameter:0.338"
Bullet Length:<<locked>>
Caliber:8.5 x 63 load data
Case Length (l3):2.48"
Cartridge Length (C.O.L.):<<locked>>
Case Capacity:75.5 Grains of Water
Primer Size:Large Rifle (LR)
Barrel Length:23.62"
Max. allowed Pressure:62,366 psi
Recommended Twist Rate:1:15.0
Load data in caliber 8.5 x 63 with .338 | 250gr | Nosler Partition Gold 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, Alliant Power Pro 2000-MR 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: 23.62"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 86% | 54,549 psi | 87% | 2326 fps | 100% |
| Accurate 2460 | <<locked>> | 84% | 56,391 psi | 90% | 2392 fps | 100% |
| Accurate 2495 | <<locked>> | 92% | 56,130 psi | 90% | 2388 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 54,781 psi | 88% | 2408 fps | 100% |
| Accurate 2700 | <<locked>> | 92% | 55,898 psi | 90% | 2392 fps | 97.2% |
| Accurate 4064 | <<locked>> | 94% | 55,782 psi | 89% | 2428 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 51,358 psi | 82% | 2454 fps | 99.4% |
| ADI AR 2206H | <<locked>> | 88% | 53,490 psi | 86% | 2415 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 94% | 54,491 psi | 87% | 2415 fps | 99.8% |
| ADI Benchmark 8208 | <<locked>> | 88% | 56,057 psi | 90% | 2415 fps | 100% |
| Alliant AR-Comp | <<locked>> | 86% | 53,171 psi | 85% | 2352 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 54,549 psi | 87% | 2464 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 92% | 56,318 psi | 90% | 2566 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 54,143 psi | 87% | 2434 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 82% | 54,302 psi | 87% | 2326 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 92% | 54,752 psi | 88% | 2451 fps | 99.9% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 50,067 psi | 80% | 2457 fps | 99.5% |
| Alliant Reloder-17 | <<locked>> | 98% | 54,389 psi | 87% | 2539 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 35,476 psi | 57% | 2231 fps | 98% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 39,160 psi | 63% | 2356 fps | 96.8% |
| Baschieri & Pellagri 106 | <<locked>> | 82% | 56,260 psi | 90% | 2316 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 53,243 psi | 85% | 2431 fps | 99.6% |
| Bofors RP3 | <<locked>> | 94% | 54,317 psi | 87% | 2444 fps | 100% |
| Bofors RP7 | <<locked>> | 98% | 54,911 psi | 88% | 2418 fps | 97.3% |
| Hodgdon Benchmark | <<locked>> | 86% | 54,665 psi | 88% | 2359 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 88% | 55,114 psi | 88% | 2444 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 84% | 53,461 psi | 86% | 2484 fps | 99.9% |
| Hodgdon H322 | <<locked>> | 82% | 53,301 psi | 85% | 2365 fps | 100% |
| Hodgdon H335 | <<locked>> | 82% | 54,288 psi | 87% | 2392 fps | 100% |
| Hodgdon H380 | <<locked>> | 94% | 55,637 psi | 89% | 2457 fps | 99.5% |
| Hodgdon H414ᴾ | <<locked>> | 100% | 54,607 psi | 88% | 2500 fps | 98% |
| Hodgdon H4350 | <<locked>> | 98% | 55,970 psi | 90% | 2467 fps | 96.9% |
| Hodgdon H4895 | <<locked>> | 88% | 53,969 psi | 87% | 2425 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 46,151 psi | 74% | 2352 fps | 99.7% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 52,997 psi | 85% | 2454 fps | 100% |
| Hodgdon Superformanceᴾ | <<locked>> | 100% | 55,753 psi | 89% | 2533 fps | 97.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,288 psi | 57% | 1434 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 55,347 psi | 89% | 2428 fps | 100% |
| IMR 3031 | <<locked>> | 88% | 53,664 psi | 86% | 2405 fps | 100% |
| IMR 4064 | <<locked>> | 92% | 54,099 psi | 87% | 2402 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 90% | 54,433 psi | 87% | 2385 fps | 97.8% |
| IMR 4198 | <<locked>> | 82% | 54,810 psi | 88% | 2290 fps | 100% |
| IMR 4350ᴾ | <<locked>> | 100% | 51,517 psi | 83% | 2395 fps | 96.7% |
| IMR 4451 Enduron | <<locked>> | 96% | 53,519 psi | 86% | 2402 fps | 97.5% |
| IMR 4831ᴾ | <<locked>> | 100% | 48,747 psi | 78% | 2402 fps | 99.2% |
| IMR 4895 | <<locked>> | 92% | 56,115 psi | 90% | 2477 fps | 100% |
| IMR 8208 XBR | <<locked>> | 88% | 56,057 psi | 90% | 2415 fps | 100% |
| Lovex D073.5 | <<locked>> | 84% | 56,318 psi | 90% | 2405 fps | 100% |
| Lovex D073.6 | <<locked>> | 90% | 56,347 psi | 90% | 2434 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 53,679 psi | 86% | 2356 fps | 99.9% |
| Lovex S062 | <<locked>> | 92% | 53,708 psi | 86% | 2395 fps | 100% |
| Lovex S065ᴾ | <<locked>> | 100% | 55,753 psi | 89% | 2438 fps | 99% |
| Lovex S070ᴾ | <<locked>> | 100% | 53,359 psi | 86% | 2425 fps | 97.9% |
| Norma 201 | <<locked>> | 90% | 55,535 psi | 89% | 2408 fps | 100% |
| Norma 202 | <<locked>> | 90% | 56,086 psi | 90% | 2408 fps | 100% |
| Norma 203B | <<locked>> | 92% | 53,896 psi | 86% | 2441 fps | 100% |
| Norma URPᴾ | <<locked>> | 100% | 50,894 psi | 82% | 2444 fps | 99.3% |
| Ramshot Big Game | <<locked>> | 92% | 54,143 psi | 87% | 2464 fps | 99.9% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 49,908 psi | 80% | 2441 fps | 98% |
| Ramshot TAC | <<locked>> | 86% | 52,910 psi | 85% | 2388 fps | 98.8% |
| Ramshot Wild Boar | <<locked>> | 88% | 55,956 psi | 90% | 2454 fps | 100% |
| Ramshot X-Terminator | <<locked>> | 84% | 53,795 psi | 86% | 2379 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,549 psi | 57% | 1467 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 55,840 psi | 90% | 2398 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 94% | 56,144 psi | 90% | 2441 fps | 98.5% |
| ReloadSwiss RS 52 | <<locked>> | 90% | 54,853 psi | 88% | 2507 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 96% | 54,317 psi | 87% | 2539 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 50,749 psi | 81% | 2474 fps | 99.2% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 51,285 psi | 82% | 2497 fps | 99% |
| Rottweil R 901 | <<locked>> | 86% | 53,519 psi | 86% | 2352 fps | 100% |
| Rottweil R 902 | <<locked>> | 92% | 56,028 psi | 90% | 2405 fps | 100% |
| Rottweil R 903 | <<locked>> | 96% | 54,186 psi | 87% | 2438 fps | 100% |
| Rottweil R 907 | <<locked>> | 98% | 54,911 psi | 88% | 2418 fps | 97.3% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 55,753 psi | 89% | 2438 fps | 99% |
| Shooters World Match Rifle | <<locked>> | 90% | 56,347 psi | 90% | 2434 fps | 100% |
| Shooters World Precision | <<locked>> | 92% | 53,708 psi | 86% | 2395 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 53,359 psi | 86% | 2425 fps | 97.9% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 55,593 psi | 89% | 2375 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 96% | 56,043 psi | 90% | 2493 fps | 100% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 55,230 psi | 89% | 2343 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 88% | 54,766 psi | 88% | 2418 fps | 99.3% |
| SNPE Vectan SP 9 | <<locked>> | 90% | 55,114 psi | 88% | 2434 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 54,273 psi | 87% | 2316 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 53,911 psi | 86% | 2313 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 53,098 psi | 85% | 2356 fps | 97.5% |
| Somchem S321 | <<locked>> | 84% | 53,780 psi | 86% | 2405 fps | 100% |
| Somchem S335 | <<locked>> | 88% | 53,316 psi | 85% | 2313 fps | 100% |
| Somchem S341 | <<locked>> | 88% | 54,375 psi | 87% | 2411 fps | 99.9% |
| Somchem S355 | <<locked>> | 96% | 54,679 psi | 88% | 2434 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 45,368 psi | 73% | 2405 fps | 100% |
| Vihtavuori N130 | <<locked>> | 84% | 54,056 psi | 87% | 2283 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 54,389 psi | 87% | 2303 fps | 100% |
| Vihtavuori N135 | <<locked>> | 92% | 55,738 psi | 89% | 2375 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 53,229 psi | 85% | 2352 fps | 100% |
| Vihtavuori N150 | <<locked>> | 98% | 56,130 psi | 90% | 2415 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 53,490 psi | 86% | 2441 fps | 99.5% |
| Vihtavuori N530 | <<locked>> | 86% | 53,156 psi | 85% | 2372 fps | 100% |
| Vihtavuori N540 | <<locked>> | 92% | 54,810 psi | 88% | 2395 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 52,243 psi | 84% | 2448 fps | 99.3% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 38,218 psi | 61% | 2297 fps | 97.9% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 53,954 psi | 87% | 2428 fps | 100% |
| Winchester 748 | <<locked>> | 88% | 56,333 psi | 90% | 2457 fps | 100% |
| Winchester 760ᴾ | <<locked>> | 100% | 54,607 psi | 88% | 2500 fps | 98% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 31,778 psi | 51% | 2218 fps | 97.2% |
| Winchester StaBALL Match | <<locked>> | 90% | 55,158 psi | 88% | 2444 fps | 100% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 23.62"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 80% | 45,614 psi | 73% | 2215 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 49,429 psi | 79% | 2306 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 38,174 psi | 61% | 2152 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 44,556 psi | 71% | 2274 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 45,992 psi | 74% | 2254 fps | 95.1% |
| Accurate 4064 | <<locked>> | 80% | 36,114 psi | 58% | 2146 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 31,821 psi | 51% | 2123 fps | 95.1% |
| ADI AR 2206H | <<locked>> | 80% | 41,684 psi | 67% | 2238 fps | 98.9% |
| ADI AR 2208 | <<locked>> | 80% | 35,592 psi | 57% | 2113 fps | 96.9% |
| ADI Benchmark 8208 | <<locked>> | 80% | 43,700 psi | 70% | 2244 fps | 99.8% |
| Alliant AR-Comp | <<locked>> | 80% | 43,758 psi | 70% | 2234 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 50,952 psi | 82% | 2415 fps | 100% |
| Alliant Power Pro 2000-MR | 48.7 gr | 80% | 37,652 psi | 60% | 2257 fps | 97.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 34,940 psi | 56% | 2129 fps | 98.3% |
| Alliant Reloder-10x | <<locked>> | 80% | 51,343 psi | 82% | 2290 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 37,521 psi | 60% | 2182 fps | 97.6% |
| Alliant Reloder-16 | <<locked>> | 86% | 32,822 psi | 53% | 2136 fps | 95.2% |
| Alliant Reloder-17 | 48 gr | 80% | 30,153 psi | 48% | 2100 fps | 96.1% |
| Alliant Reloder-23 | <<locked>> | 94% | 29,762 psi | 48% | 2096 fps | 95.6% |
| Alliant Reloder-26 | <<locked>> | 98% | 36,419 psi | 58% | 2300 fps | 95.7% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 52,663 psi | 84% | 2274 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 40,654 psi | 65% | 2241 fps | 97.9% |
| Bofors RP3 | <<locked>> | 80% | 34,272 psi | 55% | 2133 fps | 98.3% |
| Bofors RP7 | <<locked>> | 92% | 45,614 psi | 73% | 2283 fps | 95.4% |
| Hodgdon Benchmark | <<locked>> | 80% | 45,832 psi | 73% | 2238 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 42,163 psi | 68% | 2264 fps | 99.9% |
| Hodgdon CFE223 | <<locked>> | 80% | 46,485 psi | 75% | 2385 fps | 99.3% |
| Hodgdon H322 | <<locked>> | 80% | 50,082 psi | 80% | 2323 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 50,879 psi | 82% | 2349 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 35,244 psi | 57% | 2133 fps | 95.6% |
| Hodgdon H414 | <<locked>> | 92% | 42,105 psi | 68% | 2310 fps | 95.3% |
| Hodgdon H4350 | <<locked>> | 94% | 49,110 psi | 79% | 2372 fps | 95.5% |
| Hodgdon H4895 | <<locked>> | 80% | 42,018 psi | 67% | 2244 fps | 99.3% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 28,224 psi | 45% | 2005 fps | 95.3% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 37,971 psi | 61% | 2224 fps | 99% |
| Hodgdon Superformance | <<locked>> | 94% | 45,121 psi | 72% | 2375 fps | 95.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,194 psi | 42% | 1276 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 40,466 psi | 65% | 2208 fps | 99% |
| IMR 3031 | <<locked>> | 80% | 41,510 psi | 67% | 2244 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 37,347 psi | 60% | 2139 fps | 97.6% |
| IMR 4166 Enduron | <<locked>> | 82% | 42,554 psi | 68% | 2205 fps | 95.2% |
| IMR 4198 | <<locked>> | 80% | 51,503 psi | 83% | 2251 fps | 100% |
| IMR 4350 | <<locked>> | 96% | 45,513 psi | 73% | 2306 fps | 95.4% |
| IMR 4451 Enduron | <<locked>> | 90% | 44,875 psi | 72% | 2274 fps | 95.7% |
| IMR 4831 | <<locked>> | 88% | 33,127 psi | 53% | 2133 fps | 95.6% |
| IMR 4895 | <<locked>> | 80% | 38,392 psi | 62% | 2208 fps | 98.4% |
| IMR 8208 XBR | <<locked>> | 80% | 43,700 psi | 70% | 2244 fps | 99.8% |
| Lovex D073.5 | <<locked>> | 80% | 49,342 psi | 79% | 2316 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 40,437 psi | 65% | 2221 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 42,163 psi | 68% | 2185 fps | 99% |
| Lovex S062 | <<locked>> | 80% | 37,173 psi | 60% | 2146 fps | 99% |
| Lovex S065 | <<locked>> | 86% | 36,651 psi | 59% | 2136 fps | 95% |
| Lovex S070 | <<locked>> | 92% | 41,553 psi | 67% | 2244 fps | 95.3% |
| Norma 201 | <<locked>> | 80% | 41,133 psi | 66% | 2201 fps | 99.6% |
| Norma 202 | <<locked>> | 80% | 41,162 psi | 66% | 2208 fps | 100% |
| Norma 203B | <<locked>> | 80% | 36,883 psi | 59% | 2172 fps | 98% |
| Norma URP | <<locked>> | 86% | 32,503 psi | 52% | 2126 fps | 95% |
| Ramshot Big Game | <<locked>> | 80% | 36,230 psi | 58% | 2182 fps | 97.6% |
| Ramshot Hunter | <<locked>> | 92% | 38,551 psi | 62% | 2251 fps | 95% |
| Ramshot TAC | <<locked>> | 80% | 43,569 psi | 70% | 2251 fps | 97.2% |
| Ramshot Wild Boar | <<locked>> | 80% | 42,989 psi | 69% | 2267 fps | 99.1% |
| Ramshot X-Terminator | <<locked>> | 80% | 47,195 psi | 76% | 2287 fps | 99.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,498 psi | 42% | 1309 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 48,979 psi | 79% | 2313 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 40,872 psi | 66% | 2215 fps | 95.5% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 38,986 psi | 63% | 2267 fps | 98% |
| ReloadSwiss RS 60 | 48 gr | 80% | 32,082 psi | 51% | 2156 fps | 99.1% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 33,895 psi | 54% | 2185 fps | 95.3% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 36,796 psi | 59% | 2238 fps | 95.3% |
| Rottweil R 901 | <<locked>> | 80% | 45,034 psi | 72% | 2234 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 39,030 psi | 63% | 2159 fps | 99.3% |
| Rottweil R 903 | <<locked>> | 80% | 32,460 psi | 52% | 2087 fps | 97.5% |
| Rottweil R 907 | <<locked>> | 92% | 45,614 psi | 73% | 2283 fps | 95.4% |
| Shooters World Long Rifle | <<locked>> | 86% | 36,651 psi | 59% | 2136 fps | 95% |
| Shooters World Match Rifle | <<locked>> | 80% | 40,437 psi | 65% | 2221 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 37,173 psi | 60% | 2146 fps | 99% |
| Shooters World SW4350 | <<locked>> | 92% | 41,553 psi | 67% | 2244 fps | 95.3% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 51,735 psi | 83% | 2329 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 33,272 psi | 53% | 2126 fps | 96.8% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 52,170 psi | 84% | 2306 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 41,814 psi | 67% | 2228 fps | 97.3% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 40,176 psi | 64% | 2211 fps | 98.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 42,612 psi | 68% | 2162 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 35,259 psi | 57% | 2051 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 43,468 psi | 70% | 2221 fps | 95.5% |
| Somchem S321 | <<locked>> | 80% | 47,050 psi | 75% | 2313 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 42,134 psi | 68% | 2165 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 41,394 psi | 66% | 2224 fps | 98.8% |
| Somchem S355 | <<locked>> | 80% | 33,446 psi | 54% | 2093 fps | 97.5% |
| Somchem S365 | <<locked>> | 82% | 25,628 psi | 41% | 1988 fps | 95.5% |
| Vihtavuori N130 | <<locked>> | 80% | 48,167 psi | 77% | 2211 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 42,859 psi | 69% | 2156 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 38,348 psi | 61% | 2146 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 39,044 psi | 63% | 2156 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 31,763 psi | 51% | 2041 fps | 98.3% |
| Vihtavuori N160 | <<locked>> | 86% | 34,113 psi | 55% | 2129 fps | 95.6% |
| Vihtavuori N530 | <<locked>> | 80% | 43,685 psi | 70% | 2241 fps | 99.8% |
| Vihtavuori N540 | <<locked>> | 80% | 37,304 psi | 60% | 2142 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 86% | 33,286 psi | 53% | 2129 fps | 95.1% |
| Vihtavuori N555 | <<locked>> | 94% | 31,531 psi | 51% | 2159 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 28,181 psi | 45% | 1975 fps | 95.2% |
| Winchester 748 | <<locked>> | 80% | 43,149 psi | 69% | 2283 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 42,105 psi | 68% | 2310 fps | 95.3% |
| Winchester StaBALL HD | <<locked>> | 98% | 29,805 psi | 48% | 2162 fps | 96% |
| Winchester StaBALL Match | <<locked>> | 80% | 39,450 psi | 63% | 2215 fps | 99% |
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 120 powders for 8.5 x 63 loaded with the .338 | 250gr | Nosler Partition Gold. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,566 fps; across all powders the maximum-charge window runs from 1,434 fps to 2,566 fps. Accurate 3100 gives the best case fill at 100 %, and 120 of the 120 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (430 MPa), the top charges use 48–90 %, leaving at least 10 % headroom. The 250.0 gr projectile in 0.338" calls for a 1:15.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate 4350, 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 60, Alliant Power Pro 2000-MR, Alliant Reloder-17 rank at the top here: for 8.5 x 63 with the .338 | 250gr | Nosler Partition Gold they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 3100, ADI AR 2209, Alliant Reloder-19 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.