Load Specifications
Bullet Manufacturer:Berger
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:1:11.5
Load data in caliber 8.5 x 63 with .338 | 250gr | Berger Hybrid OTM 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% | 54,288 psi | 87% | 2293 fps | 100% |
| Accurate 2460 | <<locked>> | 86% | 56,057 psi | 90% | 2359 fps | 100% |
| Accurate 2495 | <<locked>> | 94% | 54,911 psi | 88% | 2349 fps | 100% |
| Accurate 2520 | <<locked>> | 88% | 53,867 psi | 86% | 2369 fps | 100% |
| Accurate 2700 | <<locked>> | 94% | 55,419 psi | 89% | 2346 fps | 96.4% |
| Accurate 4064 | <<locked>> | 96% | 54,433 psi | 87% | 2385 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 46,296 psi | 74% | 2356 fps | 98.4% |
| Accurate LT-30 | <<locked>> | 82% | 53,867 psi | 86% | 2244 fps | 100% |
| Accurate LT-32 | <<locked>> | 82% | 54,288 psi | 87% | 2264 fps | 100% |
| ADI AR 2206H | <<locked>> | 92% | 56,391 psi | 90% | 2418 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 96% | 53,780 psi | 86% | 2369 fps | 99.5% |
| ADI AR 2219 | <<locked>> | 82% | 54,302 psi | 87% | 2349 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 90% | 55,550 psi | 89% | 2375 fps | 100% |
| Alliant AR-Comp | <<locked>> | 90% | 55,695 psi | 89% | 2356 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 84% | 54,027 psi | 87% | 2425 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 94% | 55,680 psi | 89% | 2520 fps | 99.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 98% | 56,318 psi | 90% | 2431 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 84% | 54,288 psi | 87% | 2297 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 94% | 54,099 psi | 87% | 2411 fps | 99.7% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 46,441 psi | 74% | 2365 fps | 98.6% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 53,287 psi | 85% | 2490 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 32,706 psi | 52% | 2136 fps | 96.2% |
| Baschieri & Pellagri 106 | <<locked>> | 84% | 56,391 psi | 90% | 2287 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 92% | 56,028 psi | 90% | 2434 fps | 99.6% |
| Bofors RP3 | <<locked>> | 96% | 53,447 psi | 86% | 2405 fps | 100% |
| Bofors RP7ᴾ | <<locked>> | 100% | 54,404 psi | 87% | 2372 fps | 96.6% |
| Hodgdon Benchmark | <<locked>> | 88% | 54,665 psi | 88% | 2326 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 90% | 54,578 psi | 88% | 2408 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 88% | 56,391 psi | 90% | 2490 fps | 99.8% |
| Hodgdon H322 | <<locked>> | 84% | 52,997 psi | 85% | 2333 fps | 100% |
| Hodgdon H335 | <<locked>> | 84% | 53,954 psi | 87% | 2359 fps | 100% |
| Hodgdon H380 | <<locked>> | 96% | 54,824 psi | 88% | 2411 fps | 99.1% |
| Hodgdon H414ᴾ | <<locked>> | 100% | 49,951 psi | 80% | 2402 fps | 96.6% |
| Hodgdon H4350ᴾ | <<locked>> | 100% | 54,911 psi | 88% | 2415 fps | 96% |
| Hodgdon H4895 | <<locked>> | 90% | 53,359 psi | 86% | 2382 fps | 99.9% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 42,395 psi | 68% | 2264 fps | 99% |
| Hodgdon LEVERevolution | <<locked>> | 94% | 55,506 psi | 89% | 2457 fps | 100% |
| Hodgdon Superformanceᴾ | <<locked>> | 100% | 51,271 psi | 82% | 2428 fps | 96% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,751 psi | 56% | 1398 fps | 100% |
| Hodgdon VARGET | <<locked>> | 92% | 54,708 psi | 88% | 2385 fps | 100% |
| IMR 3031 | <<locked>> | 92% | 56,362 psi | 90% | 2411 fps | 100% |
| IMR 4064 | <<locked>> | 94% | 53,432 psi | 86% | 2359 fps | 99.6% |
| IMR 4166 Enduron | <<locked>> | 92% | 54,201 psi | 87% | 2343 fps | 97.1% |
| IMR 4198 | <<locked>> | 84% | 54,650 psi | 88% | 2260 fps | 100% |
| IMR 4451 Enduronᴾ | <<locked>> | 100% | 56,376 psi | 90% | 2402 fps | 97.4% |
| IMR 4831ᴾ | <<locked>> | 100% | 44,382 psi | 71% | 2310 fps | 98.1% |
| IMR 4895 | <<locked>> | 94% | 55,448 psi | 89% | 2438 fps | 99.9% |
| IMR 8208 XBR | <<locked>> | 90% | 55,550 psi | 89% | 2375 fps | 100% |
| Lovex D073.5 | <<locked>> | 86% | 55,796 psi | 89% | 2369 fps | 100% |
| Lovex D073.6 | <<locked>> | 92% | 55,564 psi | 89% | 2398 fps | 100% |
| Lovex S060 | <<locked>> | 90% | 53,490 psi | 86% | 2320 fps | 99.8% |
| Lovex S062 | <<locked>> | 96% | 56,028 psi | 90% | 2395 fps | 100% |
| Lovex S065ᴾ | <<locked>> | 100% | 51,837 psi | 83% | 2349 fps | 98% |
| Lovex S070ᴾ | <<locked>> | 100% | 49,226 psi | 79% | 2333 fps | 96.5% |
| Norma 201 | <<locked>> | 92% | 54,984 psi | 88% | 2369 fps | 100% |
| Norma 202 | <<locked>> | 92% | 55,463 psi | 89% | 2372 fps | 100% |
| Norma 203B | <<locked>> | 94% | 53,200 psi | 85% | 2398 fps | 99.8% |
| Norma URPᴾ | <<locked>> | 100% | 46,557 psi | 75% | 2352 fps | 98.4% |
| Ramshot Big Game | <<locked>> | 94% | 53,272 psi | 85% | 2421 fps | 99.8% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 45,847 psi | 74% | 2346 fps | 96.5% |
| Ramshot TAC | <<locked>> | 90% | 56,289 psi | 90% | 2398 fps | 98.8% |
| Ramshot Wild Boar | <<locked>> | 90% | 55,259 psi | 89% | 2411 fps | 99.9% |
| Ramshot X-Terminator | <<locked>> | 86% | 53,563 psi | 86% | 2339 fps | 99.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,230 psi | 56% | 1434 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 86% | 55,448 psi | 89% | 2362 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 96% | 55,666 psi | 89% | 2398 fps | 98% |
| ReloadSwiss RS 52 | <<locked>> | 92% | 53,824 psi | 86% | 2464 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 98% | 53,272 psi | 85% | 2493 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 46,224 psi | 74% | 2375 fps | 98.2% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 47,326 psi | 76% | 2395 fps | 97.7% |
| Rottweil R 901 | <<locked>> | 90% | 56,391 psi | 90% | 2356 fps | 100% |
| Rottweil R 902 | <<locked>> | 94% | 55,506 psi | 89% | 2369 fps | 100% |
| Rottweil R 903 | <<locked>> | 98% | 53,011 psi | 85% | 2392 fps | 100% |
| Rottweil R 907ᴾ | <<locked>> | 100% | 54,404 psi | 87% | 2372 fps | 96.6% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 51,837 psi | 83% | 2349 fps | 98% |
| Shooters World Match Rifle | <<locked>> | 92% | 55,564 psi | 89% | 2398 fps | 100% |
| Shooters World Precision | <<locked>> | 96% | 56,028 psi | 90% | 2395 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 49,226 psi | 79% | 2333 fps | 96.5% |
| Shooters World Tactical Rifle | <<locked>> | 84% | 55,477 psi | 89% | 2343 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 82% | 54,737 psi | 88% | 2362 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 98% | 55,013 psi | 88% | 2448 fps | 99.9% |
| SNPE Vectan SP 3 | <<locked>> | 84% | 55,230 psi | 89% | 2313 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 90% | 54,157 psi | 87% | 2375 fps | 98.9% |
| SNPE Vectan SP 9 | <<locked>> | 92% | 54,737 psi | 88% | 2395 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 90% | 54,172 psi | 87% | 2283 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 96% | 53,635 psi | 86% | 2280 fps | 100% |
| SNPE Vectan Tubal 7000ᴾ | <<locked>> | 100% | 52,344 psi | 84% | 2313 fps | 96.8% |
| Somchem S321 | <<locked>> | 86% | 53,403 psi | 86% | 2369 fps | 100% |
| Somchem S335 | <<locked>> | 92% | 56,115 psi | 90% | 2316 fps | 100% |
| Somchem S341 | <<locked>> | 90% | 53,722 psi | 86% | 2372 fps | 99.8% |
| Somchem S355 | <<locked>> | 98% | 53,896 psi | 86% | 2395 fps | 99.9% |
| Somchem S365ᴾ | <<locked>> | 100% | 41,495 psi | 67% | 2313 fps | 99.7% |
| Vihtavuori N130 | <<locked>> | 86% | 54,114 psi | 87% | 2254 fps | 100% |
| Vihtavuori N133 | <<locked>> | 90% | 54,114 psi | 87% | 2270 fps | 100% |
| Vihtavuori N135 | <<locked>> | 94% | 54,766 psi | 88% | 2339 fps | 100% |
| Vihtavuori N140 | <<locked>> | 94% | 55,869 psi | 90% | 2352 fps | 100% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 55,390 psi | 89% | 2379 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 48,820 psi | 78% | 2349 fps | 98.6% |
| Vihtavuori N530 | <<locked>> | 88% | 52,837 psi | 85% | 2336 fps | 100% |
| Vihtavuori N540 | <<locked>> | 94% | 53,867 psi | 86% | 2356 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 47,921 psi | 77% | 2356 fps | 98.3% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 34,490 psi | 55% | 2198 fps | 96.2% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 50,024 psi | 80% | 2343 fps | 99.8% |
| Winchester 748 | <<locked>> | 90% | 55,622 psi | 89% | 2421 fps | 100% |
| Winchester 760ᴾ | <<locked>> | 100% | 50,285 psi | 81% | 2405 fps | 96.6% |
| Winchester StaBALL Match | <<locked>> | 92% | 54,491 psi | 87% | 2405 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% | 42,395 psi | 68% | 2142 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 46,064 psi | 74% | 2234 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 34,824 psi | 56% | 2077 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 41,249 psi | 66% | 2198 fps | 99.9% |
| Accurate 2700 | <<locked>> | 90% | 48,776 psi | 78% | 2257 fps | 95.1% |
| Accurate 4064 | <<locked>> | 80% | 32,924 psi | 53% | 2064 fps | 99.6% |
| Accurate 4350 | <<locked>> | 92% | 35,259 psi | 57% | 2169 fps | 95.8% |
| Accurate LT-30 | <<locked>> | 80% | 50,792 psi | 81% | 2208 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 51,184 psi | 82% | 2228 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 39,001 psi | 63% | 2159 fps | 98% |
| ADI AR 2208 | <<locked>> | 80% | 33,170 psi | 53% | 2034 fps | 95.5% |
| ADI AR 2219 | <<locked>> | 80% | 50,807 psi | 81% | 2306 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 80% | 41,017 psi | 66% | 2172 fps | 99.2% |
| Alliant AR-Comp | <<locked>> | 80% | 40,161 psi | 64% | 2165 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 47,558 psi | 76% | 2336 fps | 99.7% |
| Alliant Power Pro 2000-MR | 45.1 gr | 80% | 34,940 psi | 56% | 2165 fps | 95.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 32,329 psi | 52% | 2054 fps | 97.1% |
| Alliant Reloder-10x | <<locked>> | 80% | 48,095 psi | 77% | 2221 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 34,896 psi | 56% | 2103 fps | 96.4% |
| Alliant Reloder-16 | <<locked>> | 90% | 34,345 psi | 55% | 2136 fps | 95.1% |
| Alliant Reloder-17 | <<locked>> | 82% | 29,660 psi | 48% | 2057 fps | 95% |
| Alliant Reloder-23 | <<locked>> | 98% | 30,893 psi | 50% | 2093 fps | 95.3% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 49,661 psi | 80% | 2208 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 37,739 psi | 61% | 2159 fps | 96.6% |
| Bofors RP3 | <<locked>> | 80% | 31,502 psi | 51% | 2051 fps | 97% |
| Bofors RP7 | <<locked>> | 96% | 48,037 psi | 77% | 2283 fps | 95.2% |
| Hodgdon Benchmark | <<locked>> | 80% | 42,931 psi | 69% | 2162 fps | 99.7% |
| Hodgdon BL-C2 | <<locked>> | 80% | 38,957 psi | 62% | 2185 fps | 99.3% |
| Hodgdon CFE223 | <<locked>> | 80% | 42,830 psi | 69% | 2297 fps | 98.4% |
| Hodgdon H322 | <<locked>> | 80% | 46,630 psi | 75% | 2251 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 47,384 psi | 76% | 2274 fps | 100% |
| Hodgdon H380 | <<locked>> | 84% | 37,115 psi | 60% | 2139 fps | 95.6% |
| Hodgdon H414 | <<locked>> | 96% | 44,135 psi | 71% | 2310 fps | 95.1% |
| Hodgdon H4350 | <<locked>> | 98% | 51,474 psi | 83% | 2369 fps | 95.3% |
| Hodgdon H4895 | <<locked>> | 80% | 39,262 psi | 63% | 2169 fps | 98.5% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 29,472 psi | 47% | 2008 fps | 95.1% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 34,940 psi | 56% | 2139 fps | 98% |
| Hodgdon Superformance | <<locked>> | 98% | 47,688 psi | 76% | 2375 fps | 95.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,976 psi | 42% | 1250 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 37,695 psi | 60% | 2129 fps | 98.1% |
| IMR 3031 | <<locked>> | 80% | 38,189 psi | 61% | 2169 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 34,766 psi | 56% | 2060 fps | 96.3% |
| IMR 4166 Enduron | <<locked>> | 86% | 45,063 psi | 72% | 2208 fps | 95.1% |
| IMR 4198 | <<locked>> | 80% | 48,631 psi | 78% | 2188 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 94% | 47,123 psi | 76% | 2274 fps | 95.6% |
| IMR 4831 | <<locked>> | 92% | 34,418 psi | 55% | 2136 fps | 95.5% |
| IMR 4895 | <<locked>> | 80% | 35,679 psi | 57% | 2129 fps | 97.3% |
| IMR 8208 XBR | <<locked>> | 80% | 41,017 psi | 66% | 2172 fps | 99.2% |
| Lovex D073.5 | <<locked>> | 80% | 45,614 psi | 73% | 2238 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 37,159 psi | 60% | 2139 fps | 99.6% |
| Lovex S060 | <<locked>> | 80% | 39,610 psi | 64% | 2110 fps | 98.1% |
| Lovex S062 | <<locked>> | 80% | 34,505 psi | 55% | 2067 fps | 98.1% |
| Lovex S065 | <<locked>> | 92% | 40,596 psi | 65% | 2178 fps | 95.6% |
| Lovex S070 | <<locked>> | 96% | 43,482 psi | 70% | 2247 fps | 95.1% |
| Norma 201 | <<locked>> | 80% | 38,087 psi | 61% | 2119 fps | 98.8% |
| Norma 202 | <<locked>> | 80% | 38,319 psi | 61% | 2136 fps | 99.9% |
| Norma 203B | <<locked>> | 80% | 34,316 psi | 55% | 2096 fps | 96.8% |
| Norma URP | <<locked>> | 92% | 36,158 psi | 58% | 2175 fps | 95.8% |
| Ramshot Big Game | <<locked>> | 80% | 33,533 psi | 54% | 2100 fps | 96.2% |
| Ramshot Hunter | <<locked>> | 98% | 43,018 psi | 69% | 2297 fps | 95.7% |
| Ramshot TAC | <<locked>> | 80% | 40,785 psi | 65% | 2169 fps | 95.8% |
| Ramshot Wild Boar | <<locked>> | 80% | 39,943 psi | 64% | 2188 fps | 98.1% |
| Ramshot X-Terminator | <<locked>> | 80% | 44,164 psi | 71% | 2208 fps | 98.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,049 psi | 42% | 1276 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 45,919 psi | 74% | 2241 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 43,105 psi | 69% | 2221 fps | 95.4% |
| ReloadSwiss RS 52 | 43.7 gr | 80% | 35,737 psi | 57% | 2175 fps | 96.6% |
| ReloadSwiss RS 60 | 44.4 gr | 80% | 29,660 psi | 48% | 2067 fps | 97.7% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 35,317 psi | 57% | 2185 fps | 95.2% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 38,725 psi | 62% | 2241 fps | 95.1% |
| Rottweil R 901 | <<locked>> | 80% | 41,930 psi | 67% | 2159 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 36,303 psi | 58% | 2080 fps | 98.5% |
| Rottweil R 903 | <<locked>> | 80% | 29,718 psi | 48% | 2005 fps | 96% |
| Rottweil R 907 | <<locked>> | 96% | 48,037 psi | 77% | 2283 fps | 95.2% |
| Shooters World Long Rifle | <<locked>> | 92% | 40,596 psi | 65% | 2178 fps | 95.6% |
| Shooters World Match Rifle | <<locked>> | 80% | 37,159 psi | 60% | 2139 fps | 99.6% |
| Shooters World Precision | <<locked>> | 80% | 34,505 psi | 55% | 2067 fps | 98.1% |
| Shooters World SW4350 | <<locked>> | 96% | 43,482 psi | 70% | 2247 fps | 95.1% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 48,399 psi | 78% | 2251 fps | 99.8% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 51,358 psi | 82% | 2320 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 30,792 psi | 49% | 2044 fps | 95.2% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 48,863 psi | 78% | 2238 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 38,609 psi | 62% | 2142 fps | 95.9% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 37,318 psi | 60% | 2133 fps | 97.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 39,943 psi | 64% | 2090 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 32,880 psi | 53% | 1982 fps | 99.8% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 45,585 psi | 73% | 2221 fps | 95.4% |
| Somchem S321 | <<locked>> | 80% | 43,816 psi | 70% | 2238 fps | 99.7% |
| Somchem S335 | <<locked>> | 80% | 39,218 psi | 63% | 2093 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 38,464 psi | 62% | 2146 fps | 97.7% |
| Somchem S355 | <<locked>> | 80% | 30,748 psi | 49% | 2011 fps | 96.1% |
| Somchem S365 | <<locked>> | 86% | 26,818 psi | 43% | 1995 fps | 95.5% |
| Vihtavuori N130 | <<locked>> | 80% | 45,295 psi | 73% | 2146 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 40,118 psi | 64% | 2090 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 35,418 psi | 57% | 2077 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 36,143 psi | 58% | 2080 fps | 99.9% |
| Vihtavuori N150 | <<locked>> | 80% | 29,182 psi | 47% | 1965 fps | 97% |
| Vihtavuori N160 | <<locked>> | 90% | 35,578 psi | 57% | 2129 fps | 95.4% |
| Vihtavuori N530 | <<locked>> | 80% | 40,756 psi | 65% | 2165 fps | 99.3% |
| Vihtavuori N540 | <<locked>> | 80% | 34,722 psi | 56% | 2070 fps | 99.6% |
| Vihtavuori N550 | <<locked>> | 90% | 34,809 psi | 56% | 2136 fps | 95% |
| Vihtavuori N555 | <<locked>> | 98% | 32,532 psi | 52% | 2156 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 29,892 psi | 48% | 1985 fps | 95.3% |
| Winchester 748 | <<locked>> | 80% | 39,668 psi | 64% | 2198 fps | 99.6% |
| Winchester 760 | <<locked>> | 96% | 44,135 psi | 71% | 2310 fps | 95.1% |
| Winchester StaBALL Match | <<locked>> | 80% | 36,637 psi | 59% | 2136 fps | 98% |
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 | Berger Hybrid OTM. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,520 fps; across all powders the maximum-charge window runs from 1,398 fps to 2,520 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 52–90 %, leaving at least 10 % headroom. The 250.0 gr projectile in 0.338" calls for a 1:11.5 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 | Berger Hybrid OTM 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.