Load Specifications
Bullet Manufacturer:Hornady
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:1:6.0
Load data in caliber 8.5 x 63 with .338 | 250gr | Hornady InterLock RN bullet and 102 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 Hodgdon Superformance.
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>> | 84% | 54,563 psi | 87% | 2349 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 56,318 psi | 90% | 2415 fps | 100% |
| Accurate 2495 | <<locked>> | 90% | 56,434 psi | 90% | 2411 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 52,939 psi | 85% | 2418 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 52,939 psi | 85% | 2418 fps | 100% |
| Accurate 2700 | <<locked>> | 92% | 52,982 psi | 85% | 2379 fps | 97.2% |
| Accurate 3100ᴾ | <<locked>> | 100% | 39,711 psi | 64% | 2287 fps | 96.2% |
| Accurate 4064 | <<locked>> | 92% | 56,318 psi | 90% | 2454 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 55,825 psi | 90% | 2536 fps | 99.9% |
| ADI AR 2206H | <<locked>> | 86% | 53,388 psi | 86% | 2441 fps | 100% |
| ADI AR 2208 | <<locked>> | 92% | 54,549 psi | 87% | 2444 fps | 99.9% |
| ADI Benchmark 8208 | <<locked>> | 86% | 55,854 psi | 90% | 2438 fps | 100% |
| Alliant AR-Comp | <<locked>> | 84% | 53,156 psi | 85% | 2372 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 88% | 52,837 psi | 85% | 2546 fps | 99.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 54,331 psi | 87% | 2461 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 90% | 54,955 psi | 88% | 2480 fps | 100% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 53,650 psi | 86% | 2539 fps | 99.9% |
| Alliant Reloder-17 | <<locked>> | 96% | 54,708 psi | 88% | 2572 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 38,363 psi | 62% | 2316 fps | 99.1% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 42,511 psi | 68% | 2454 fps | 98.3% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 52,939 psi | 85% | 2457 fps | 99.8% |
| Bofors RP3 | <<locked>> | 92% | 54,752 psi | 88% | 2474 fps | 100% |
| Bofors RP7 | <<locked>> | 96% | 55,071 psi | 88% | 2451 fps | 97.8% |
| Hodgdon Benchmark | <<locked>> | 84% | 54,288 psi | 87% | 2382 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 86% | 55,230 psi | 89% | 2470 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 82% | 53,417 psi | 86% | 2510 fps | 100% |
| Hodgdon H322 | <<locked>> | 84% | 55,927 psi | 90% | 2418 fps | 100% |
| Hodgdon H380 | <<locked>> | 92% | 55,796 psi | 89% | 2487 fps | 99.7% |
| Hodgdon H414 | <<locked>> | 94% | 52,997 psi | 85% | 2507 fps | 98.2% |
| Hodgdon H4350 | <<locked>> | 98% | 54,041 psi | 87% | 2474 fps | 97.1% |
| Hodgdon H4895 | <<locked>> | 86% | 53,896 psi | 86% | 2448 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 49,835 psi | 80% | 2431 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 53,243 psi | 85% | 2480 fps | 100% |
| Hodgdon Superformance | <<locked>> | 98% | 55,912 psi | 90% | 2572 fps | 98.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,578 psi | 57% | 1463 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 54,114 psi | 87% | 2438 fps | 100% |
| IMR 3031 | <<locked>> | 90% | 55,825 psi | 90% | 2454 fps | 100% |
| IMR 4064 | <<locked>> | 94% | 56,275 psi | 90% | 2457 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 94% | 55,970 psi | 90% | 2438 fps | 98.4% |
| IMR 4350ᴾ | <<locked>> | 100% | 55,129 psi | 88% | 2474 fps | 97.9% |
| IMR 4451 Enduron | <<locked>> | 94% | 53,461 psi | 86% | 2431 fps | 98% |
| IMR 4831ᴾ | <<locked>> | 100% | 46,963 psi | 75% | 2402 fps | 99.3% |
| IMR 4895 | <<locked>> | 90% | 56,347 psi | 90% | 2507 fps | 100% |
| IMR 8208 XBR | <<locked>> | 86% | 55,854 psi | 90% | 2438 fps | 100% |
| Lovex D073.5 | <<locked>> | 82% | 56,043 psi | 90% | 2428 fps | 100% |
| Lovex D073.6 | <<locked>> | 86% | 52,939 psi | 85% | 2418 fps | 100% |
| Lovex S060 | <<locked>> | 86% | 53,214 psi | 85% | 2379 fps | 100% |
| Lovex S062 | <<locked>> | 90% | 53,780 psi | 86% | 2425 fps | 100% |
| Lovex S065 | <<locked>> | 98% | 56,173 psi | 90% | 2474 fps | 99.3% |
| Lovex S070 | <<locked>> | 98% | 53,519 psi | 86% | 2457 fps | 98.3% |
| Norma 201 | <<locked>> | 88% | 55,680 psi | 89% | 2438 fps | 100% |
| Norma 202 | <<locked>> | 88% | 56,217 psi | 90% | 2438 fps | 100% |
| Norma 203B | <<locked>> | 90% | 54,157 psi | 87% | 2470 fps | 100% |
| Norma 204ᴾ | <<locked>> | 100% | 55,738 psi | 89% | 2520 fps | 96.8% |
| Norma URPᴾ | <<locked>> | 100% | 54,694 psi | 88% | 2523 fps | 99.8% |
| Ramshot Big Game | <<locked>> | 90% | 54,549 psi | 87% | 2493 fps | 100% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 53,563 psi | 86% | 2523 fps | 98.9% |
| Ramshot TAC | <<locked>> | 86% | 56,014 psi | 90% | 2464 fps | 99.4% |
| Ramshot Wild Boar | <<locked>> | 86% | 55,622 psi | 89% | 2477 fps | 100% |
| Ramshot X-Terminator | <<locked>> | 82% | 53,374 psi | 86% | 2402 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,042 psi | 58% | 1499 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 55,492 psi | 89% | 2421 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 56,289 psi | 90% | 2477 fps | 98.9% |
| ReloadSwiss RS 52 | <<locked>> | 88% | 55,288 psi | 89% | 2539 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 54,476 psi | 87% | 2569 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 55,288 psi | 89% | 2556 fps | 99.8% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 55,201 psi | 89% | 2585 fps | 99.7% |
| Rottweil R 901 | <<locked>> | 84% | 53,606 psi | 86% | 2379 fps | 100% |
| Rottweil R 902 | <<locked>> | 90% | 56,043 psi | 90% | 2434 fps | 100% |
| Rottweil R 903 | <<locked>> | 94% | 54,621 psi | 88% | 2467 fps | 100% |
| Rottweil R 907 | <<locked>> | 96% | 55,071 psi | 88% | 2451 fps | 97.8% |
| Shooters World Long Rifle | <<locked>> | 98% | 56,173 psi | 90% | 2474 fps | 99.3% |
| Shooters World Match Rifle | <<locked>> | 86% | 52,939 psi | 85% | 2418 fps | 100% |
| Shooters World Precision | <<locked>> | 90% | 53,780 psi | 86% | 2425 fps | 100% |
| Shooters World SW4350 | <<locked>> | 98% | 53,519 psi | 86% | 2457 fps | 98.3% |
| SNPE Vectan SP 11 | <<locked>> | 94% | 56,333 psi | 90% | 2523 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 54,665 psi | 88% | 2444 fps | 99.6% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 55,187 psi | 88% | 2461 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 53,969 psi | 87% | 2339 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 53,809 psi | 86% | 2336 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 53,127 psi | 85% | 2388 fps | 98% |
| Somchem S321 | <<locked>> | 82% | 53,548 psi | 86% | 2428 fps | 100% |
| Somchem S335 | <<locked>> | 86% | 53,258 psi | 85% | 2339 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 54,012 psi | 87% | 2434 fps | 100% |
| Somchem S355 | <<locked>> | 94% | 55,027 psi | 88% | 2467 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 49,255 psi | 79% | 2484 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 45,905 psi | 74% | 2379 fps | 96.1% |
| Unknown powder | <<locked>> | 98% | 56,115 psi | 90% | 2533 fps | 99.7% |
| Vihtavuori N130 | <<locked>> | 82% | 53,867 psi | 86% | 2303 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 54,215 psi | 87% | 2326 fps | 100% |
| Vihtavuori N135 | <<locked>> | 90% | 55,811 psi | 89% | 2398 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 53,330 psi | 86% | 2379 fps | 100% |
| Vihtavuori N150 | <<locked>> | 96% | 56,434 psi | 90% | 2444 fps | 100% |
| Vihtavuori N160 | <<locked>> | 98% | 53,998 psi | 87% | 2477 fps | 99.7% |
| Vihtavuori N530 | <<locked>> | 84% | 53,011 psi | 85% | 2398 fps | 100% |
| Vihtavuori N540 | <<locked>> | 90% | 54,752 psi | 88% | 2418 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 56,304 psi | 90% | 2526 fps | 99.8% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 41,713 psi | 67% | 2382 fps | 99% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 54,099 psi | 87% | 2457 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 53,243 psi | 85% | 2448 fps | 100% |
| Winchester 760 | <<locked>> | 94% | 52,997 psi | 85% | 2507 fps | 98.2% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 34,200 psi | 55% | 2320 fps | 99% |
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% | 48,124 psi | 77% | 2267 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 52,663 psi | 84% | 2372 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 40,857 psi | 66% | 2211 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 46,151 psi | 74% | 2329 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 46,151 psi | 74% | 2329 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 43,743 psi | 70% | 2241 fps | 95.1% |
| Accurate 3100 | <<locked>> | 98% | 37,130 psi | 60% | 2241 fps | 95.4% |
| Accurate 4064 | <<locked>> | 80% | 38,667 psi | 62% | 2208 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 32,285 psi | 52% | 2152 fps | 95.8% |
| ADI AR 2206H | <<locked>> | 80% | 44,469 psi | 71% | 2306 fps | 99.5% |
| ADI AR 2208 | <<locked>> | 80% | 37,710 psi | 60% | 2178 fps | 97.9% |
| ADI Benchmark 8208 | <<locked>> | 80% | 46,499 psi | 75% | 2313 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 46,833 psi | 75% | 2293 fps | 100% |
| Alliant Power Pro 2000-MR | 52.1 gr | 80% | 40,335 psi | 65% | 2339 fps | 98.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 37,434 psi | 60% | 2201 fps | 99.1% |
| Alliant Reloder-15 | <<locked>> | 80% | 40,161 psi | 64% | 2254 fps | 98.6% |
| Alliant Reloder-16 | <<locked>> | 82% | 30,995 psi | 50% | 2116 fps | 95% |
| Alliant Reloder-17 | <<locked>> | 80% | 32,242 psi | 52% | 2178 fps | 97.5% |
| Alliant Reloder-23 | <<locked>> | 90% | 28,355 psi | 45% | 2083 fps | 95.5% |
| Alliant Reloder-26 | <<locked>> | 94% | 34,490 psi | 55% | 2287 fps | 95.7% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 43,482 psi | 70% | 2313 fps | 98.8% |
| Bofors RP3 | <<locked>> | 80% | 36,927 psi | 59% | 2205 fps | 99.1% |
| Bofors RP7 | <<locked>> | 88% | 43,105 psi | 69% | 2270 fps | 95.3% |
| Hodgdon Benchmark | <<locked>> | 80% | 48,109 psi | 77% | 2297 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 45,266 psi | 73% | 2336 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 80% | 49,908 psi | 80% | 2461 fps | 99.8% |
| Hodgdon H322 | <<locked>> | 80% | 49,255 psi | 79% | 2336 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 37,739 psi | 61% | 2205 fps | 96.9% |
| Hodgdon H414 | <<locked>> | 86% | 40,669 psi | 65% | 2310 fps | 95.4% |
| Hodgdon H4350 | <<locked>> | 92% | 45,005 psi | 72% | 2336 fps | 95% |
| Hodgdon H4895 | <<locked>> | 80% | 44,860 psi | 72% | 2316 fps | 99.8% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 26,672 psi | 43% | 1988 fps | 95% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 38,305 psi | 61% | 2251 fps | 99.3% |
| Hodgdon Superformance | 61 gr | 90% | 42,264 psi | 68% | 2359 fps | 95.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,542 psi | 43% | 1306 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 39,929 psi | 64% | 2221 fps | 99.2% |
| IMR 3031 | <<locked>> | 80% | 40,872 psi | 66% | 2251 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 37,159 psi | 60% | 2159 fps | 98% |
| IMR 4166 Enduron | <<locked>> | 84% | 41,582 psi | 67% | 2215 fps | 95.5% |
| IMR 4350 | <<locked>> | 92% | 42,989 psi | 69% | 2293 fps | 95.3% |
| IMR 4451 Enduron | <<locked>> | 86% | 42,047 psi | 67% | 2254 fps | 95.5% |
| IMR 4831 | <<locked>> | 86% | 30,342 psi | 49% | 2090 fps | 95% |
| IMR 4895 | <<locked>> | 80% | 41,147 psi | 66% | 2280 fps | 99.2% |
| IMR 8208 XBR | <<locked>> | 80% | 46,499 psi | 75% | 2313 fps | 100% |
| Lovex D073.5 | <<locked>> | 80% | 52,446 psi | 84% | 2382 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 43,555 psi | 70% | 2290 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 44,396 psi | 71% | 2247 fps | 99.5% |
| Lovex S062 | <<locked>> | 80% | 39,494 psi | 63% | 2208 fps | 99.6% |
| Lovex S065 | <<locked>> | 84% | 36,738 psi | 59% | 2162 fps | 95.6% |
| Lovex S070 | <<locked>> | 88% | 39,421 psi | 63% | 2234 fps | 95.2% |
| Norma 201 | <<locked>> | 80% | 43,497 psi | 70% | 2264 fps | 99.9% |
| Norma 202 | <<locked>> | 80% | 43,845 psi | 70% | 2270 fps | 100% |
| Norma 203B | <<locked>> | 80% | 39,552 psi | 63% | 2244 fps | 98.9% |
| Norma 204 | <<locked>> | 96% | 48,791 psi | 78% | 2421 fps | 95.3% |
| Norma URP | <<locked>> | 84% | 32,880 psi | 53% | 2156 fps | 95.8% |
| Ramshot Big Game | <<locked>> | 80% | 38,986 psi | 63% | 2257 fps | 98.7% |
| Ramshot Hunter | <<locked>> | 90% | 38,914 psi | 62% | 2283 fps | 95.8% |
| Ramshot TAC | <<locked>> | 80% | 46,267 psi | 74% | 2323 fps | 98.2% |
| Ramshot Wild Boar | <<locked>> | 80% | 45,730 psi | 73% | 2336 fps | 99.6% |
| Ramshot X-Terminator | <<locked>> | 80% | 50,096 psi | 80% | 2356 fps | 99.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,861 psi | 43% | 1339 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 51,938 psi | 83% | 2375 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 38,130 psi | 61% | 2188 fps | 95.2% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 42,177 psi | 68% | 2346 fps | 99% |
| ReloadSwiss RS 60 | 51.3 gr | 80% | 34,330 psi | 55% | 2234 fps | 99.8% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 32,169 psi | 52% | 2169 fps | 95.2% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 34,635 psi | 56% | 2221 fps | 95.1% |
| Rottweil R 901 | <<locked>> | 80% | 47,456 psi | 76% | 2293 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 41,408 psi | 66% | 2224 fps | 99.7% |
| Rottweil R 903 | <<locked>> | 80% | 34,722 psi | 56% | 2156 fps | 98.4% |
| Rottweil R 907 | <<locked>> | 88% | 43,105 psi | 69% | 2270 fps | 95.3% |
| Shooters World Long Rifle | <<locked>> | 84% | 36,738 psi | 59% | 2162 fps | 95.6% |
| Shooters World Match Rifle | <<locked>> | 80% | 43,555 psi | 70% | 2290 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 39,494 psi | 63% | 2208 fps | 99.6% |
| Shooters World SW4350 | <<locked>> | 88% | 39,421 psi | 63% | 2234 fps | 95.2% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 35,766 psi | 57% | 2201 fps | 98% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 44,512 psi | 71% | 2297 fps | 98.3% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 42,917 psi | 69% | 2283 fps | 99.3% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 44,875 psi | 72% | 2218 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 37,333 psi | 60% | 2110 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 40,973 psi | 66% | 2205 fps | 95.4% |
| Somchem S321 | <<locked>> | 80% | 50,140 psi | 80% | 2382 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 44,454 psi | 71% | 2221 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 44,280 psi | 71% | 2297 fps | 99.4% |
| Somchem S355 | <<locked>> | 80% | 35,636 psi | 57% | 2162 fps | 98.5% |
| Somchem S365 | <<locked>> | 80% | 25,889 psi | 42% | 2018 fps | 96.3% |
| Somchem S385 | <<locked>> | 98% | 42,844 psi | 69% | 2329 fps | 95.2% |
| Unknown powder | <<locked>> | 82% | 33,533 psi | 54% | 2156 fps | 95.2% |
| Vihtavuori N130 | <<locked>> | 80% | 50,633 psi | 81% | 2264 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 45,223 psi | 73% | 2211 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 40,886 psi | 66% | 2205 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 41,365 psi | 66% | 2211 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 33,823 psi | 54% | 2106 fps | 99% |
| Vihtavuori N160 | <<locked>> | 82% | 32,169 psi | 52% | 2110 fps | 95.4% |
| Vihtavuori N530 | <<locked>> | 80% | 46,528 psi | 75% | 2310 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 39,798 psi | 64% | 2208 fps | 100% |
| Vihtavuori N550 | <<locked>> | 84% | 33,634 psi | 54% | 2159 fps | 95.8% |
| Vihtavuori N555 | <<locked>> | 90% | 30,240 psi | 48% | 2149 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 30,037 psi | 48% | 2044 fps | 96.7% |
| Winchester 748 | <<locked>> | 80% | 49,719 psi | 80% | 2398 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 40,669 psi | 65% | 2310 fps | 95.4% |
| Winchester StaBALL HD | <<locked>> | 94% | 28,297 psi | 45% | 2149 fps | 96% |
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 8.5 x 63 loaded with the .338 | 250gr | Hornady InterLock RN. ReloadSwiss RS 70 delivers the highest muzzle velocity at 2,585 fps; across all powders the maximum-charge window runs from 1,463 fps to 2,585 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 55–90 %, leaving at least 10 % headroom. The 250.0 gr projectile in 0.338" calls for a 1:6.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate 4350, 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. ReloadSwiss RS 60, Alliant Power Pro 2000-MR, Hodgdon Superformance rank at the top here: for 8.5 x 63 with the .338 | 250gr | Hornady InterLock RN 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.