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:1:12.5
Load data in caliber 8.5 x 63 with .338 | 250gr | Nosler AccuBond bullet and 106 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, ReloadSwiss RS 52 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>> | 88% | 54,592 psi | 88% | 2300 fps | 100% |
| Accurate 2460 | <<locked>> | 84% | 53,026 psi | 85% | 2326 fps | 100% |
| Accurate 2495 | <<locked>> | 94% | 55,492 psi | 89% | 2359 fps | 100% |
| Accurate 2520 | <<locked>> | 88% | 54,389 psi | 87% | 2379 fps | 100% |
| Accurate 2700 | <<locked>> | 94% | 56,173 psi | 90% | 2359 fps | 96.6% |
| Accurate 4064 | <<locked>> | 96% | 54,998 psi | 88% | 2395 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 47,036 psi | 75% | 2369 fps | 98.6% |
| Accurate LT-30 | <<locked>> | 82% | 54,143 psi | 87% | 2251 fps | 100% |
| Accurate LT-32 | <<locked>> | 82% | 54,563 psi | 87% | 2274 fps | 100% |
| ADI AR 2206H | <<locked>> | 90% | 53,432 psi | 86% | 2385 fps | 99.8% |
| ADI AR 2208 | <<locked>> | 96% | 54,549 psi | 87% | 2385 fps | 99.6% |
| ADI AR 2219 | <<locked>> | 82% | 54,969 psi | 88% | 2359 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 90% | 56,072 psi | 90% | 2388 fps | 100% |
| Alliant AR-Comp | <<locked>> | 90% | 56,362 psi | 90% | 2365 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 84% | 54,389 psi | 87% | 2434 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 92% | 52,562 psi | 84% | 2480 fps | 99.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 96% | 53,606 psi | 86% | 2402 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 84% | 54,607 psi | 88% | 2306 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 94% | 54,592 psi | 88% | 2421 fps | 99.7% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 46,833 psi | 75% | 2375 fps | 98.7% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 53,911 psi | 86% | 2503 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 33,011 psi | 53% | 2146 fps | 96.4% |
| Baschieri & Pellagri 106 | <<locked>> | 82% | 53,229 psi | 85% | 2254 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 90% | 53,026 psi | 85% | 2398 fps | 99.4% |
| Bofors RP3 | <<locked>> | 96% | 53,969 psi | 87% | 2415 fps | 100% |
| Bofors RP7ᴾ | <<locked>> | 100% | 54,810 psi | 88% | 2382 fps | 96.7% |
| Hodgdon Benchmark | <<locked>> | 88% | 55,143 psi | 88% | 2336 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 90% | 55,056 psi | 88% | 2418 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 86% | 53,345 psi | 86% | 2454 fps | 99.7% |
| Hodgdon H322 | <<locked>> | 84% | 53,664 psi | 86% | 2343 fps | 100% |
| Hodgdon H335 | <<locked>> | 84% | 54,505 psi | 87% | 2369 fps | 100% |
| Hodgdon H380 | <<locked>> | 96% | 55,608 psi | 89% | 2428 fps | 99.2% |
| Hodgdon H414ᴾ | <<locked>> | 100% | 50,676 psi | 81% | 2415 fps | 96.8% |
| Hodgdon H4350ᴾ | <<locked>> | 100% | 55,593 psi | 89% | 2431 fps | 96.2% |
| Hodgdon H4895 | <<locked>> | 90% | 53,882 psi | 86% | 2395 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 43,105 psi | 69% | 2277 fps | 99.2% |
| Hodgdon LEVERevolution | <<locked>> | 94% | 56,014 psi | 90% | 2464 fps | 100% |
| Hodgdon Superformanceᴾ | <<locked>> | 100% | 51,779 psi | 83% | 2441 fps | 96.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,824 psi | 56% | 1401 fps | 100% |
| Hodgdon VARGET | <<locked>> | 92% | 55,535 psi | 89% | 2398 fps | 100% |
| IMR 3031 | <<locked>> | 90% | 53,330 psi | 86% | 2379 fps | 100% |
| IMR 4064 | <<locked>> | 94% | 53,925 psi | 86% | 2369 fps | 99.7% |
| IMR 4166 Enduron | <<locked>> | 92% | 54,621 psi | 88% | 2352 fps | 97.3% |
| IMR 4198 | <<locked>> | 84% | 55,013 psi | 88% | 2267 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 98% | 53,606 psi | 86% | 2369 fps | 97% |
| IMR 4831ᴾ | <<locked>> | 100% | 44,846 psi | 72% | 2320 fps | 98.3% |
| IMR 4895 | <<locked>> | 94% | 55,927 psi | 90% | 2448 fps | 100% |
| IMR 8208 XBR | <<locked>> | 90% | 56,072 psi | 90% | 2388 fps | 100% |
| Lovex D073.5 | <<locked>> | 84% | 52,852 psi | 85% | 2336 fps | 100% |
| Lovex D073.6 | <<locked>> | 92% | 56,101 psi | 90% | 2408 fps | 100% |
| Lovex S060 | <<locked>> | 90% | 53,693 psi | 86% | 2323 fps | 99.8% |
| Lovex S062 | <<locked>> | 94% | 53,388 psi | 86% | 2365 fps | 100% |
| Lovex S065ᴾ | <<locked>> | 100% | 52,214 psi | 84% | 2359 fps | 98.1% |
| Lovex S070ᴾ | <<locked>> | 100% | 49,574 psi | 79% | 2343 fps | 96.7% |
| Norma 201 | <<locked>> | 92% | 55,521 psi | 89% | 2379 fps | 100% |
| Norma 202 | <<locked>> | 92% | 56,014 psi | 90% | 2382 fps | 100% |
| Norma 203B | <<locked>> | 94% | 53,737 psi | 86% | 2411 fps | 99.9% |
| Norma URPᴾ | <<locked>> | 100% | 46,949 psi | 75% | 2362 fps | 98.5% |
| Ramshot Big Game | <<locked>> | 94% | 54,041 psi | 87% | 2434 fps | 99.8% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 46,180 psi | 74% | 2356 fps | 96.6% |
| Ramshot TAC | <<locked>> | 88% | 53,301 psi | 85% | 2365 fps | 98.5% |
| Ramshot Wild Boar | <<locked>> | 90% | 55,709 psi | 89% | 2421 fps | 99.9% |
| Ramshot X-Terminator | <<locked>> | 86% | 54,012 psi | 87% | 2352 fps | 99.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,331 psi | 57% | 1437 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 86% | 56,014 psi | 90% | 2375 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 96% | 56,072 psi | 90% | 2408 fps | 98.1% |
| ReloadSwiss RS 52 | <<locked>> | 92% | 54,447 psi | 87% | 2477 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 98% | 53,998 psi | 87% | 2507 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 46,818 psi | 75% | 2388 fps | 98.3% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 47,805 psi | 77% | 2408 fps | 97.9% |
| Rottweil R 901 | <<locked>> | 88% | 53,534 psi | 86% | 2326 fps | 100% |
| Rottweil R 902 | <<locked>> | 94% | 56,072 psi | 90% | 2379 fps | 100% |
| Rottweil R 903 | <<locked>> | 98% | 53,824 psi | 86% | 2405 fps | 100% |
| Rottweil R 907ᴾ | <<locked>> | 100% | 54,810 psi | 88% | 2382 fps | 96.7% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 52,214 psi | 84% | 2359 fps | 98.1% |
| Shooters World Match Rifle | <<locked>> | 92% | 56,101 psi | 90% | 2408 fps | 100% |
| Shooters World Precision | <<locked>> | 94% | 53,388 psi | 86% | 2365 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 49,574 psi | 79% | 2343 fps | 96.7% |
| Shooters World Tactical Rifle | <<locked>> | 84% | 55,999 psi | 90% | 2352 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 82% | 55,317 psi | 89% | 2372 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 98% | 55,390 psi | 89% | 2457 fps | 99.9% |
| SNPE Vectan SP 3 | <<locked>> | 84% | 55,579 psi | 89% | 2323 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 90% | 54,940 psi | 88% | 2388 fps | 99% |
| SNPE Vectan SP 9 | <<locked>> | 92% | 55,201 psi | 89% | 2405 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 90% | 54,404 psi | 87% | 2290 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 96% | 54,114 psi | 87% | 2290 fps | 100% |
| SNPE Vectan Tubal 7000ᴾ | <<locked>> | 100% | 52,721 psi | 85% | 2320 fps | 96.9% |
| Somchem S321 | <<locked>> | 86% | 53,867 psi | 86% | 2379 fps | 100% |
| Somchem S335 | <<locked>> | 90% | 53,490 psi | 86% | 2290 fps | 100% |
| Somchem S341 | <<locked>> | 90% | 54,157 psi | 87% | 2379 fps | 99.8% |
| Somchem S355 | <<locked>> | 98% | 54,375 psi | 87% | 2405 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 41,814 psi | 67% | 2320 fps | 99.8% |
| Vihtavuori N130 | <<locked>> | 86% | 54,375 psi | 87% | 2260 fps | 100% |
| Vihtavuori N133 | <<locked>> | 90% | 54,389 psi | 87% | 2277 fps | 100% |
| Vihtavuori N135 | <<locked>> | 94% | 55,347 psi | 89% | 2349 fps | 100% |
| Vihtavuori N140 | <<locked>> | 94% | 56,362 psi | 90% | 2362 fps | 100% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 55,840 psi | 90% | 2385 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 49,559 psi | 79% | 2362 fps | 98.7% |
| Vihtavuori N530 | <<locked>> | 88% | 53,388 psi | 86% | 2349 fps | 100% |
| Vihtavuori N540 | <<locked>> | 94% | 54,607 psi | 88% | 2365 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 48,573 psi | 78% | 2369 fps | 98.5% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 35,056 psi | 56% | 2211 fps | 96.5% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 50,560 psi | 81% | 2352 fps | 99.9% |
| Winchester 748 | <<locked>> | 90% | 56,115 psi | 90% | 2431 fps | 100% |
| Winchester 760ᴾ | <<locked>> | 100% | 50,923 psi | 82% | 2418 fps | 96.8% |
| Winchester StaBALL Match | <<locked>> | 92% | 54,940 psi | 88% | 2415 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% | 42,728 psi | 69% | 2152 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 46,340 psi | 74% | 2241 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 35,360 psi | 57% | 2087 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 41,582 psi | 67% | 2205 fps | 100% |
| Accurate 2700 | <<locked>> | 90% | 49,168 psi | 79% | 2267 fps | 95.2% |
| Accurate 4064 | <<locked>> | 80% | 33,475 psi | 54% | 2077 fps | 99.7% |
| Accurate 4350 | <<locked>> | 90% | 33,286 psi | 53% | 2133 fps | 95.1% |
| Accurate LT-30 | <<locked>> | 80% | 51,097 psi | 82% | 2215 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 51,488 psi | 83% | 2234 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 39,276 psi | 63% | 2169 fps | 98.1% |
| ADI AR 2208 | <<locked>> | 80% | 33,402 psi | 54% | 2044 fps | 95.6% |
| ADI AR 2219 | <<locked>> | 80% | 51,445 psi | 82% | 2316 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 80% | 41,321 psi | 66% | 2178 fps | 99.3% |
| Alliant AR-Comp | <<locked>> | 80% | 40,538 psi | 65% | 2172 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 47,892 psi | 77% | 2343 fps | 99.7% |
| Alliant Power Pro 2000-MR | 45.6 gr | 80% | 35,346 psi | 57% | 2178 fps | 95.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 32,605 psi | 52% | 2060 fps | 97.3% |
| Alliant Reloder-10x | <<locked>> | 80% | 48,443 psi | 78% | 2231 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 35,186 psi | 56% | 2113 fps | 96.5% |
| Alliant Reloder-16 | <<locked>> | 90% | 34,737 psi | 56% | 2149 fps | 95.4% |
| Alliant Reloder-17 | <<locked>> | 82% | 30,023 psi | 48% | 2070 fps | 95.3% |
| Alliant Reloder-23 | <<locked>> | 98% | 31,183 psi | 50% | 2103 fps | 95.6% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 50,125 psi | 80% | 2218 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 38,189 psi | 61% | 2169 fps | 96.8% |
| Bofors RP3 | <<locked>> | 80% | 31,981 psi | 51% | 2064 fps | 97.2% |
| Bofors RP7 | <<locked>> | 96% | 48,428 psi | 78% | 2293 fps | 95.4% |
| Hodgdon Benchmark | <<locked>> | 80% | 43,221 psi | 69% | 2172 fps | 99.7% |
| Hodgdon BL-C2 | <<locked>> | 80% | 39,436 psi | 63% | 2195 fps | 99.4% |
| Hodgdon CFE223 | <<locked>> | 80% | 43,323 psi | 69% | 2310 fps | 98.5% |
| Hodgdon H322 | <<locked>> | 80% | 47,224 psi | 76% | 2260 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 47,645 psi | 76% | 2280 fps | 100% |
| Hodgdon H380 | <<locked>> | 82% | 35,172 psi | 56% | 2106 fps | 95% |
| Hodgdon H414 | <<locked>> | 96% | 44,483 psi | 71% | 2320 fps | 95.3% |
| Hodgdon H4350 | <<locked>> | 98% | 52,185 psi | 84% | 2382 fps | 95.5% |
| Hodgdon H4895 | <<locked>> | 80% | 39,566 psi | 63% | 2178 fps | 98.6% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 29,675 psi | 48% | 2018 fps | 95.3% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 35,375 psi | 57% | 2149 fps | 98.1% |
| Hodgdon Superformance | <<locked>> | 98% | 48,211 psi | 77% | 2388 fps | 95.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,904 psi | 42% | 1250 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 38,189 psi | 61% | 2142 fps | 98.3% |
| IMR 3031 | <<locked>> | 80% | 38,754 psi | 62% | 2178 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 35,027 psi | 56% | 2070 fps | 96.5% |
| IMR 4166 Enduron | <<locked>> | 86% | 45,498 psi | 73% | 2221 fps | 95.4% |
| IMR 4198 | <<locked>> | 80% | 49,037 psi | 79% | 2198 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 92% | 44,657 psi | 72% | 2238 fps | 95% |
| IMR 4831 | <<locked>> | 92% | 34,809 psi | 56% | 2146 fps | 95.7% |
| IMR 4895 | <<locked>> | 80% | 35,984 psi | 58% | 2139 fps | 97.4% |
| IMR 8208 XBR | <<locked>> | 80% | 41,321 psi | 66% | 2178 fps | 99.3% |
| Lovex D073.5 | <<locked>> | 80% | 46,166 psi | 74% | 2247 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 37,724 psi | 60% | 2152 fps | 99.7% |
| Lovex S060 | <<locked>> | 80% | 39,885 psi | 64% | 2119 fps | 98.2% |
| Lovex S062 | <<locked>> | 80% | 34,766 psi | 56% | 2077 fps | 98.2% |
| Lovex S065 | <<locked>> | 90% | 38,740 psi | 62% | 2149 fps | 95.1% |
| Lovex S070 | <<locked>> | 96% | 43,888 psi | 70% | 2257 fps | 95.3% |
| Norma 201 | <<locked>> | 80% | 38,638 psi | 62% | 2133 fps | 99% |
| Norma 202 | <<locked>> | 80% | 38,624 psi | 62% | 2142 fps | 100% |
| Norma 203B | <<locked>> | 80% | 34,563 psi | 55% | 2103 fps | 97% |
| Norma URP | <<locked>> | 90% | 34,301 psi | 55% | 2139 fps | 95.2% |
| Ramshot Big Game | <<locked>> | 80% | 33,939 psi | 54% | 2110 fps | 96.4% |
| Ramshot Hunter | <<locked>> | 96% | 40,698 psi | 65% | 2260 fps | 95.1% |
| Ramshot TAC | <<locked>> | 80% | 40,973 psi | 66% | 2175 fps | 96% |
| Ramshot Wild Boar | <<locked>> | 80% | 40,161 psi | 64% | 2195 fps | 98.2% |
| Ramshot X-Terminator | <<locked>> | 80% | 44,643 psi | 72% | 2218 fps | 98.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,208 psi | 42% | 1283 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 46,209 psi | 74% | 2247 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 43,569 psi | 70% | 2231 fps | 95.7% |
| ReloadSwiss RS 52 | 44.2 gr | 80% | 36,274 psi | 58% | 2192 fps | 96.9% |
| ReloadSwiss RS 60 | 44.9 gr | 80% | 30,023 psi | 48% | 2080 fps | 98% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 35,853 psi | 57% | 2198 fps | 95.5% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 39,276 psi | 63% | 2254 fps | 95.4% |
| Rottweil R 901 | <<locked>> | 80% | 42,482 psi | 68% | 2172 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 36,782 psi | 59% | 2093 fps | 98.6% |
| Rottweil R 903 | <<locked>> | 80% | 29,979 psi | 48% | 2014 fps | 96.2% |
| Rottweil R 907 | <<locked>> | 96% | 48,428 psi | 78% | 2293 fps | 95.4% |
| Shooters World Long Rifle | <<locked>> | 90% | 38,740 psi | 62% | 2149 fps | 95.1% |
| Shooters World Match Rifle | <<locked>> | 80% | 37,724 psi | 60% | 2152 fps | 99.7% |
| Shooters World Precision | <<locked>> | 80% | 34,766 psi | 56% | 2077 fps | 98.2% |
| Shooters World SW4350 | <<locked>> | 96% | 43,888 psi | 70% | 2257 fps | 95.3% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 48,936 psi | 78% | 2264 fps | 99.8% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 51,619 psi | 83% | 2326 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 31,198 psi | 50% | 2054 fps | 95.4% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 49,226 psi | 79% | 2247 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 39,044 psi | 63% | 2152 fps | 96.1% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 37,768 psi | 61% | 2142 fps | 97.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 40,248 psi | 65% | 2100 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 33,127 psi | 53% | 1991 fps | 99.8% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 46,311 psi | 74% | 2234 fps | 95.6% |
| Somchem S321 | <<locked>> | 80% | 44,338 psi | 71% | 2247 fps | 99.8% |
| Somchem S335 | <<locked>> | 80% | 39,740 psi | 64% | 2103 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 38,885 psi | 62% | 2156 fps | 97.9% |
| Somchem S355 | <<locked>> | 80% | 31,227 psi | 50% | 2024 fps | 96.3% |
| Somchem S365 | <<locked>> | 86% | 27,166 psi | 44% | 2008 fps | 95.8% |
| Vihtavuori N130 | <<locked>> | 80% | 45,629 psi | 73% | 2152 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 40,408 psi | 65% | 2096 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 35,795 psi | 57% | 2087 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 36,419 psi | 58% | 2090 fps | 99.9% |
| Vihtavuori N150 | <<locked>> | 80% | 29,443 psi | 47% | 1972 fps | 97.2% |
| Vihtavuori N160 | <<locked>> | 90% | 35,969 psi | 58% | 2139 fps | 95.6% |
| Vihtavuori N530 | <<locked>> | 80% | 41,292 psi | 66% | 2175 fps | 99.4% |
| Vihtavuori N540 | <<locked>> | 80% | 34,983 psi | 56% | 2080 fps | 99.6% |
| Vihtavuori N550 | <<locked>> | 90% | 35,186 psi | 56% | 2146 fps | 95.2% |
| Vihtavuori N555 | <<locked>> | 98% | 32,866 psi | 53% | 2165 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 30,168 psi | 48% | 1995 fps | 95.5% |
| Winchester 748 | <<locked>> | 80% | 40,205 psi | 64% | 2211 fps | 99.7% |
| Winchester 760 | <<locked>> | 96% | 44,773 psi | 72% | 2323 fps | 95.4% |
| Winchester StaBALL Match | <<locked>> | 80% | 36,869 psi | 59% | 2146 fps | 98.1% |
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 106 powders for 8.5 x 63 loaded with the .338 | 250gr | Nosler AccuBond. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,507 fps; across all powders the maximum-charge window runs from 1,401 fps to 2,507 fps. Accurate 4350 gives the best case fill at 100 %, and 106 of the 106 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (430 MPa), the top charges use 53–90 %, 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 4350, Alliant Reloder-16, Alliant Reloder-17 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, ReloadSwiss RS 52, ReloadSwiss RS 60 rank at the top here: for 8.5 x 63 with the .338 | 250gr | Nosler AccuBond 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.