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:1:15.5
Load data in caliber 8.5 x 63 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 Alliant Power Pro 2000-MR, 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: 23.62"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 86% | 55,172 psi | 88% | 2336 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 53,650 psi | 86% | 2365 fps | 100% |
| Accurate 2495 | <<locked>> | 90% | 53,287 psi | 85% | 2359 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 55,317 psi | 89% | 2418 fps | 100% |
| Accurate 2700 | <<locked>> | 90% | 53,040 psi | 85% | 2359 fps | 96.8% |
| Accurate 4064 | <<locked>> | 92% | 53,055 psi | 85% | 2398 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 52,141 psi | 84% | 2467 fps | 99.5% |
| ADI AR 2206H | <<locked>> | 88% | 54,317 psi | 87% | 2431 fps | 100% |
| ADI AR 2208 | <<locked>> | 94% | 54,926 psi | 88% | 2425 fps | 99.9% |
| ADI Benchmark 8208 | <<locked>> | 86% | 53,359 psi | 86% | 2385 fps | 100% |
| Alliant AR-Comp | <<locked>> | 86% | 53,853 psi | 86% | 2362 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 55,216 psi | 89% | 2477 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 90% | 53,345 psi | 86% | 2530 fps | 99.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 54,868 psi | 88% | 2448 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 82% | 54,969 psi | 88% | 2339 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 92% | 55,550 psi | 89% | 2467 fps | 99.9% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 50,749 psi | 81% | 2474 fps | 99.6% |
| Alliant Reloder-17 | <<locked>> | 98% | 55,013 psi | 88% | 2552 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 36,100 psi | 58% | 2247 fps | 98.2% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 39,798 psi | 64% | 2375 fps | 97.1% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 53,650 psi | 86% | 2444 fps | 99.7% |
| Bofors RP3 | <<locked>> | 94% | 55,114 psi | 88% | 2461 fps | 100% |
| Bofors RP7 | <<locked>> | 98% | 55,564 psi | 89% | 2431 fps | 97.5% |
| Hodgdon Benchmark | <<locked>> | 86% | 55,448 psi | 89% | 2372 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 88% | 55,898 psi | 90% | 2457 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 84% | 54,012 psi | 87% | 2497 fps | 99.9% |
| Hodgdon H322 | <<locked>> | 82% | 53,925 psi | 86% | 2375 fps | 100% |
| Hodgdon H335 | <<locked>> | 82% | 54,795 psi | 88% | 2402 fps | 100% |
| Hodgdon H380 | <<locked>> | 94% | 56,347 psi | 90% | 2470 fps | 99.6% |
| Hodgdon H414ᴾ | <<locked>> | 100% | 55,274 psi | 89% | 2513 fps | 98.2% |
| Hodgdon H4350 | <<locked>> | 96% | 53,069 psi | 85% | 2434 fps | 96.5% |
| Hodgdon H4895 | <<locked>> | 88% | 54,810 psi | 88% | 2438 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 46,862 psi | 75% | 2365 fps | 99.8% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 53,461 psi | 86% | 2464 fps | 100% |
| Hodgdon Superformance | <<locked>> | 98% | 52,547 psi | 84% | 2497 fps | 97.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,244 psi | 57% | 1440 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 56,101 psi | 90% | 2441 fps | 100% |
| IMR 3031 | <<locked>> | 88% | 54,317 psi | 87% | 2418 fps | 100% |
| IMR 4064 | <<locked>> | 92% | 54,578 psi | 88% | 2411 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 90% | 54,824 psi | 88% | 2395 fps | 97.9% |
| IMR 4198 | <<locked>> | 82% | 55,216 psi | 89% | 2300 fps | 100% |
| IMR 4350ᴾ | <<locked>> | 100% | 52,141 psi | 84% | 2411 fps | 97% |
| IMR 4451 Enduron | <<locked>> | 96% | 54,157 psi | 87% | 2415 fps | 97.7% |
| IMR 4831ᴾ | <<locked>> | 100% | 49,371 psi | 79% | 2415 fps | 99.3% |
| IMR 4895 | <<locked>> | 90% | 53,330 psi | 86% | 2448 fps | 100% |
| IMR 8208 XBR | <<locked>> | 86% | 53,359 psi | 86% | 2385 fps | 100% |
| Lovex D073.5 | <<locked>> | 82% | 53,534 psi | 86% | 2375 fps | 100% |
| Lovex D073.6 | <<locked>> | 88% | 53,548 psi | 86% | 2408 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 54,157 psi | 87% | 2369 fps | 100% |
| Lovex S062 | <<locked>> | 92% | 54,172 psi | 87% | 2408 fps | 100% |
| Lovex S065 | <<locked>> | 98% | 53,200 psi | 85% | 2408 fps | 98.8% |
| Lovex S070ᴾ | <<locked>> | 100% | 53,954 psi | 87% | 2441 fps | 98% |
| Norma 201 | <<locked>> | 90% | 56,333 psi | 90% | 2425 fps | 100% |
| Norma 202 | <<locked>> | 88% | 53,330 psi | 86% | 2382 fps | 100% |
| Norma 203B | <<locked>> | 92% | 54,708 psi | 88% | 2454 fps | 100% |
| Norma URPᴾ | <<locked>> | 100% | 51,561 psi | 83% | 2461 fps | 99.4% |
| Ramshot Big Game | <<locked>> | 92% | 55,129 psi | 88% | 2480 fps | 100% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 50,430 psi | 81% | 2457 fps | 98.1% |
| Ramshot TAC | <<locked>> | 86% | 53,563 psi | 86% | 2405 fps | 98.9% |
| Ramshot Wild Boar | <<locked>> | 86% | 52,910 psi | 85% | 2418 fps | 99.9% |
| Ramshot X-Terminator | <<locked>> | 84% | 54,201 psi | 87% | 2388 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,737 psi | 57% | 1476 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 56,376 psi | 90% | 2411 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 53,272 psi | 85% | 2411 fps | 98.2% |
| ReloadSwiss RS 52 | <<locked>> | 90% | 55,738 psi | 89% | 2523 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 96% | 54,969 psi | 88% | 2552 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 51,692 psi | 83% | 2490 fps | 99.4% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 52,083 psi | 84% | 2513 fps | 99.2% |
| Rottweil R 901 | <<locked>> | 86% | 54,128 psi | 87% | 2362 fps | 100% |
| Rottweil R 902 | <<locked>> | 90% | 53,606 psi | 86% | 2382 fps | 100% |
| Rottweil R 903 | <<locked>> | 96% | 54,969 psi | 88% | 2451 fps | 100% |
| Rottweil R 907 | <<locked>> | 98% | 55,564 psi | 89% | 2431 fps | 97.5% |
| Shooters World Long Rifle | <<locked>> | 98% | 53,200 psi | 85% | 2408 fps | 98.8% |
| Shooters World Match Rifle | <<locked>> | 88% | 53,548 psi | 86% | 2408 fps | 100% |
| Shooters World Precision | <<locked>> | 92% | 54,172 psi | 87% | 2408 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 53,954 psi | 87% | 2441 fps | 98% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 56,115 psi | 90% | 2388 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 94% | 53,127 psi | 85% | 2461 fps | 99.9% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 55,912 psi | 90% | 2356 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 88% | 55,463 psi | 89% | 2431 fps | 99.4% |
| SNPE Vectan SP 9 | <<locked>> | 90% | 55,869 psi | 90% | 2448 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 54,853 psi | 88% | 2329 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 54,708 psi | 88% | 2326 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 53,766 psi | 86% | 2372 fps | 97.7% |
| Somchem S321 | <<locked>> | 84% | 54,549 psi | 87% | 2418 fps | 100% |
| Somchem S335 | <<locked>> | 88% | 54,099 psi | 87% | 2329 fps | 100% |
| Somchem S341 | <<locked>> | 88% | 54,781 psi | 88% | 2421 fps | 100% |
| Somchem S355 | <<locked>> | 96% | 55,448 psi | 89% | 2451 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 45,992 psi | 74% | 2418 fps | 100% |
| Vihtavuori N130 | <<locked>> | 84% | 54,679 psi | 88% | 2293 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 54,984 psi | 88% | 2313 fps | 100% |
| Vihtavuori N135 | <<locked>> | 92% | 56,347 psi | 90% | 2385 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 54,012 psi | 87% | 2365 fps | 100% |
| Vihtavuori N150 | <<locked>> | 96% | 53,432 psi | 86% | 2388 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 54,128 psi | 87% | 2457 fps | 99.6% |
| Vihtavuori N530 | <<locked>> | 86% | 53,954 psi | 87% | 2388 fps | 100% |
| Vihtavuori N540 | <<locked>> | 92% | 55,259 psi | 89% | 2405 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 53,185 psi | 85% | 2464 fps | 99.4% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 38,798 psi | 62% | 2313 fps | 98.1% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 54,723 psi | 88% | 2441 fps | 100% |
| Winchester 748 | <<locked>> | 86% | 53,243 psi | 85% | 2428 fps | 100% |
| Winchester 760ᴾ | <<locked>> | 100% | 55,593 psi | 89% | 2520 fps | 98.2% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 32,097 psi | 51% | 2234 fps | 97.6% |
| Winchester StaBALL Match | <<locked>> | 90% | 55,898 psi | 90% | 2461 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% | 45,977 psi | 74% | 2221 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 50,270 psi | 81% | 2323 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 38,551 psi | 62% | 2162 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 45,324 psi | 73% | 2290 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 46,659 psi | 75% | 2267 fps | 95.4% |
| Accurate 4064 | <<locked>> | 80% | 36,448 psi | 58% | 2156 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 32,285 psi | 52% | 2136 fps | 95.4% |
| ADI AR 2206H | <<locked>> | 80% | 42,177 psi | 68% | 2251 fps | 99% |
| ADI AR 2208 | <<locked>> | 80% | 36,056 psi | 58% | 2126 fps | 97.1% |
| ADI Benchmark 8208 | <<locked>> | 80% | 44,251 psi | 71% | 2257 fps | 99.8% |
| Alliant AR-Comp | <<locked>> | 80% | 44,179 psi | 71% | 2244 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 51,648 psi | 83% | 2428 fps | 100% |
| Alliant Power Pro 2000-MR | 49.4 gr | 80% | 38,290 psi | 61% | 2277 fps | 97.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 35,476 psi | 57% | 2146 fps | 98.5% |
| Alliant Reloder-10x | <<locked>> | 80% | 51,764 psi | 83% | 2300 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 38,000 psi | 61% | 2195 fps | 97.8% |
| Alliant Reloder-16 | <<locked>> | 86% | 33,214 psi | 53% | 2149 fps | 95.6% |
| Alliant Reloder-17 | 48.6 gr | 80% | 30,501 psi | 49% | 2113 fps | 96.3% |
| Alliant Reloder-23 | <<locked>> | 92% | 28,384 psi | 46% | 2064 fps | 95% |
| Alliant Reloder-26 | <<locked>> | 96% | 34,722 psi | 56% | 2267 fps | 95.1% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 41,321 psi | 66% | 2257 fps | 98.1% |
| Bofors RP3 | <<locked>> | 80% | 34,795 psi | 56% | 2146 fps | 98.4% |
| Bofors RP7 | <<locked>> | 90% | 43,598 psi | 70% | 2254 fps | 95% |
| Hodgdon Benchmark | <<locked>> | 80% | 46,108 psi | 74% | 2247 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 42,902 psi | 69% | 2280 fps | 99.9% |
| Hodgdon CFE223 | <<locked>> | 80% | 47,050 psi | 75% | 2398 fps | 99.4% |
| Hodgdon H322 | <<locked>> | 80% | 50,705 psi | 81% | 2336 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 51,387 psi | 82% | 2359 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 35,723 psi | 57% | 2146 fps | 95.9% |
| Hodgdon H414 | <<locked>> | 92% | 42,728 psi | 69% | 2326 fps | 95.6% |
| Hodgdon H4350 | <<locked>> | 92% | 46,920 psi | 75% | 2346 fps | 95% |
| Hodgdon H4895 | <<locked>> | 80% | 42,569 psi | 68% | 2260 fps | 99.4% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 28,601 psi | 46% | 2021 fps | 95.6% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 38,450 psi | 62% | 2238 fps | 99.2% |
| Hodgdon Superformance | <<locked>> | 94% | 45,847 psi | 74% | 2395 fps | 95.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,237 psi | 42% | 1283 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 41,002 psi | 66% | 2221 fps | 99.2% |
| IMR 3031 | <<locked>> | 80% | 42,177 psi | 68% | 2257 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 37,855 psi | 61% | 2156 fps | 97.8% |
| IMR 4166 Enduron | <<locked>> | 82% | 42,989 psi | 69% | 2218 fps | 95.4% |
| IMR 4198 | <<locked>> | 80% | 51,938 psi | 83% | 2260 fps | 100% |
| IMR 4350 | <<locked>> | 96% | 46,093 psi | 74% | 2320 fps | 95.7% |
| IMR 4451 Enduron | <<locked>> | 88% | 42,743 psi | 69% | 2241 fps | 95.3% |
| IMR 4831 | <<locked>> | 86% | 31,575 psi | 51% | 2103 fps | 95.1% |
| IMR 4895 | <<locked>> | 80% | 38,914 psi | 62% | 2221 fps | 98.6% |
| IMR 8208 XBR | <<locked>> | 80% | 44,251 psi | 71% | 2257 fps | 99.8% |
| Lovex D073.5 | <<locked>> | 80% | 49,908 psi | 80% | 2329 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 40,973 psi | 66% | 2234 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 42,685 psi | 68% | 2198 fps | 99.1% |
| Lovex S062 | <<locked>> | 80% | 37,695 psi | 60% | 2159 fps | 99.2% |
| Lovex S065 | <<locked>> | 86% | 37,057 psi | 59% | 2149 fps | 95.3% |
| Lovex S070 | <<locked>> | 92% | 42,177 psi | 68% | 2260 fps | 95.6% |
| Norma 201 | <<locked>> | 80% | 41,423 psi | 66% | 2211 fps | 99.6% |
| Norma 202 | <<locked>> | 80% | 41,698 psi | 67% | 2221 fps | 100% |
| Norma 203B | <<locked>> | 80% | 37,391 psi | 60% | 2185 fps | 98.2% |
| Norma URP | <<locked>> | 86% | 33,054 psi | 53% | 2142 fps | 95.4% |
| Ramshot Big Game | <<locked>> | 80% | 36,883 psi | 59% | 2198 fps | 97.9% |
| Ramshot Hunter | <<locked>> | 92% | 39,088 psi | 63% | 2267 fps | 95.4% |
| Ramshot TAC | <<locked>> | 80% | 44,208 psi | 71% | 2267 fps | 97.4% |
| Ramshot Wild Boar | <<locked>> | 80% | 43,439 psi | 70% | 2280 fps | 99.2% |
| Ramshot X-Terminator | <<locked>> | 80% | 47,906 psi | 77% | 2303 fps | 99.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,556 psi | 43% | 1316 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 49,545 psi | 79% | 2323 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 41,307 psi | 66% | 2228 fps | 95.7% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 39,537 psi | 63% | 2280 fps | 98.2% |
| ReloadSwiss RS 60 | 48.6 gr | 80% | 32,445 psi | 52% | 2172 fps | 99.2% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 34,461 psi | 55% | 2201 fps | 95.7% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 37,275 psi | 60% | 2257 fps | 95.6% |
| Rottweil R 901 | <<locked>> | 80% | 45,382 psi | 73% | 2244 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 39,537 psi | 63% | 2172 fps | 99.4% |
| Rottweil R 903 | <<locked>> | 80% | 32,779 psi | 53% | 2096 fps | 97.6% |
| Rottweil R 907 | <<locked>> | 90% | 43,598 psi | 70% | 2254 fps | 95% |
| Shooters World Long Rifle | <<locked>> | 86% | 37,057 psi | 59% | 2149 fps | 95.3% |
| Shooters World Match Rifle | <<locked>> | 80% | 40,973 psi | 66% | 2234 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 37,695 psi | 60% | 2159 fps | 99.2% |
| Shooters World SW4350 | <<locked>> | 92% | 42,177 psi | 68% | 2260 fps | 95.6% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 52,533 psi | 84% | 2346 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 33,692 psi | 54% | 2139 fps | 97% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 52,576 psi | 84% | 2316 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 42,279 psi | 68% | 2241 fps | 97.5% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 40,640 psi | 65% | 2224 fps | 98.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 42,946 psi | 69% | 2169 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 35,563 psi | 57% | 2060 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 41,234 psi | 66% | 2188 fps | 95% |
| Somchem S321 | <<locked>> | 80% | 47,790 psi | 77% | 2329 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 42,453 psi | 68% | 2172 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 42,076 psi | 67% | 2241 fps | 98.9% |
| Somchem S355 | <<locked>> | 80% | 33,765 psi | 54% | 2106 fps | 97.7% |
| Somchem S365 | <<locked>> | 82% | 25,976 psi | 42% | 2005 fps | 95.9% |
| Vihtavuori N130 | <<locked>> | 80% | 48,544 psi | 78% | 2221 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 43,207 psi | 69% | 2165 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 38,740 psi | 62% | 2156 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 39,363 psi | 63% | 2162 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 32,010 psi | 51% | 2051 fps | 98.4% |
| Vihtavuori N160 | <<locked>> | 84% | 32,474 psi | 52% | 2100 fps | 95% |
| Vihtavuori N530 | <<locked>> | 80% | 44,237 psi | 71% | 2254 fps | 99.8% |
| Vihtavuori N540 | <<locked>> | 80% | 37,782 psi | 61% | 2156 fps | 100% |
| Vihtavuori N550 | <<locked>> | 86% | 33,866 psi | 54% | 2146 fps | 95.4% |
| Vihtavuori N555 | <<locked>> | 92% | 30,081 psi | 48% | 2129 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 28,587 psi | 46% | 1988 fps | 95.6% |
| Winchester 748 | <<locked>> | 80% | 43,671 psi | 70% | 2293 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 42,728 psi | 69% | 2326 fps | 95.6% |
| Winchester StaBALL HD | <<locked>> | 96% | 28,369 psi | 45% | 2126 fps | 95.2% |
| Winchester StaBALL Match | <<locked>> | 80% | 40,176 psi | 64% | 2231 fps | 99.1% |
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 121 powders for 8.5 x 63 loaded with the .338 | 250gr | Nosler Partition RN. Alliant Reloder-17 delivers the highest muzzle velocity at 2,552 fps; across all powders the maximum-charge window runs from 1,440 fps to 2,552 fps. Accurate 3100 gives the best case fill at 100 %, and 121 of the 121 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (430 MPa), the top charges use 49–90 %, 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 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. Alliant Power Pro 2000-MR, Alliant Reloder-17, ReloadSwiss RS 60 rank at the top here: for 8.5 x 63 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 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.