Load Specifications
Load data in caliber 8.5 x 63 R with .338 | 250gr | Swift A-Frame bullet and 90 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 Reloder-17 and Hodgdon H414.
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>> | 82% | 49,023 psi | 89% | 2264 fps | 100% |
| Accurate 2495 | <<locked>> | 86% | 46,920 psi | 85% | 2283 fps | 100% |
| Accurate 2520 | <<locked>> | 82% | 48,602 psi | 88% | 2336 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 49,850 psi | 90% | 2316 fps | 96.2% |
| Accurate 4064 | <<locked>> | 88% | 46,905 psi | 85% | 2320 fps | 100% |
| Accurate 4350 | <<locked>> | 98% | 48,936 psi | 89% | 2425 fps | 99.2% |
| ADI AR 2206H | <<locked>> | 84% | 47,848 psi | 87% | 2343 fps | 99.7% |
| ADI AR 2208 | <<locked>> | 90% | 48,936 psi | 89% | 2346 fps | 99.5% |
| ADI Benchmark 8208 | <<locked>> | 82% | 47,311 psi | 86% | 2303 fps | 100% |
| Alliant AR-Comp | <<locked>> | 82% | 47,268 psi | 86% | 2287 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 46,891 psi | 85% | 2434 fps | 99.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 90% | 48,544 psi | 88% | 2365 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 88% | 49,211 psi | 89% | 2382 fps | 99.6% |
| Alliant Reloder-16 | <<locked>> | 98% | 47,877 psi | 87% | 2431 fps | 99.3% |
| Alliant Reloder-17 | <<locked>> | 94% | 48,327 psi | 88% | 2461 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 36,201 psi | 66% | 2251 fps | 98.3% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 39,871 psi | 72% | 2379 fps | 97.2% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 47,065 psi | 85% | 2352 fps | 99.1% |
| Bofors RP3 | <<locked>> | 90% | 48,573 psi | 88% | 2375 fps | 100% |
| Bofors RP7 | <<locked>> | 94% | 49,211 psi | 89% | 2346 fps | 96.4% |
| Hodgdon Benchmark | <<locked>> | 82% | 49,284 psi | 89% | 2293 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 84% | 48,936 psi | 89% | 2372 fps | 100% |
| Hodgdon H380 | <<locked>> | 90% | 49,835 psi | 90% | 2385 fps | 99% |
| Hodgdon H414 | <<locked>> | 96% | 48,805 psi | 89% | 2425 fps | 97.1% |
| Hodgdon H4350 | <<locked>> | 94% | 49,864 psi | 90% | 2392 fps | 95.8% |
| Hodgdon H4895 | <<locked>> | 84% | 48,327 psi | 88% | 2352 fps | 99.9% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 46,949 psi | 85% | 2369 fps | 99.8% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 47,021 psi | 85% | 2379 fps | 99.9% |
| Hodgdon Superformance | <<locked>> | 96% | 49,255 psi | 89% | 2451 fps | 96.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,418 psi | 64% | 1444 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 49,429 psi | 90% | 2352 fps | 99.9% |
| IMR 3031 | <<locked>> | 84% | 48,037 psi | 87% | 2339 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 48,573 psi | 88% | 2333 fps | 99.5% |
| IMR 4166 Enduron | <<locked>> | 86% | 48,631 psi | 88% | 2310 fps | 96.8% |
| IMR 4350 | <<locked>> | 98% | 49,211 psi | 89% | 2369 fps | 96.4% |
| IMR 4451 Enduron | <<locked>> | 92% | 48,037 psi | 87% | 2329 fps | 96.6% |
| IMR 4831ᴾ | <<locked>> | 100% | 49,472 psi | 90% | 2418 fps | 99.3% |
| IMR 4895 | <<locked>> | 86% | 47,253 psi | 86% | 2362 fps | 99.7% |
| IMR 8208 XBR | <<locked>> | 82% | 47,311 psi | 86% | 2303 fps | 100% |
| Lovex D073.6 | <<locked>> | 84% | 46,992 psi | 85% | 2323 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 48,051 psi | 87% | 2283 fps | 99.7% |
| Lovex S062 | <<locked>> | 88% | 48,283 psi | 88% | 2329 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 47,427 psi | 86% | 2329 fps | 97.9% |
| Lovex S070 | <<locked>> | 96% | 47,790 psi | 87% | 2352 fps | 97% |
| Norma 201 | <<locked>> | 84% | 47,036 psi | 85% | 2300 fps | 100% |
| Norma 202 | <<locked>> | 84% | 47,181 psi | 86% | 2303 fps | 100% |
| Norma 203B | <<locked>> | 88% | 48,428 psi | 88% | 2372 fps | 99.7% |
| Norma URP | <<locked>> | 98% | 48,312 psi | 88% | 2415 fps | 99.1% |
| Ramshot Big Game | <<locked>> | 88% | 48,225 psi | 88% | 2388 fps | 99.7% |
| Ramshot Hunter | <<locked>> | 98% | 47,340 psi | 86% | 2411 fps | 97.6% |
| Ramshot TAC | <<locked>> | 82% | 47,166 psi | 86% | 2313 fps | 98% |
| Ramshot Wild Boar | <<locked>> | 84% | 49,763 psi | 90% | 2379 fps | 99.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,650 psi | 65% | 1473 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 47,021 psi | 85% | 2323 fps | 97.2% |
| ReloadSwiss RS 52 | <<locked>> | 86% | 48,762 psi | 88% | 2431 fps | 99.6% |
| ReloadSwiss RS 60 | <<locked>> | 92% | 48,283 psi | 88% | 2464 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 48,399 psi | 88% | 2444 fps | 99% |
| ReloadSwiss RS 70 | <<locked>> | 98% | 48,849 psi | 89% | 2467 fps | 98.7% |
| Rottweil R 901 | <<locked>> | 82% | 48,269 psi | 88% | 2287 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 47,456 psi | 86% | 2300 fps | 100% |
| Rottweil R 903 | <<locked>> | 92% | 48,472 psi | 88% | 2369 fps | 99.9% |
| Rottweil R 907 | <<locked>> | 94% | 49,211 psi | 89% | 2346 fps | 96.4% |
| Shooters World Long Rifle | <<locked>> | 94% | 47,427 psi | 86% | 2329 fps | 97.9% |
| Shooters World Match Rifle | <<locked>> | 84% | 46,992 psi | 85% | 2323 fps | 100% |
| Shooters World Precision | <<locked>> | 88% | 48,283 psi | 88% | 2329 fps | 100% |
| Shooters World SW4350 | <<locked>> | 96% | 47,790 psi | 87% | 2352 fps | 97% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 46,760 psi | 85% | 2375 fps | 99.6% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 48,515 psi | 88% | 2339 fps | 98.7% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 49,327 psi | 90% | 2362 fps | 99.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 48,660 psi | 88% | 2251 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 48,544 psi | 88% | 2254 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 47,297 psi | 86% | 2283 fps | 96.5% |
| Somchem S335 | <<locked>> | 84% | 48,066 psi | 87% | 2254 fps | 100% |
| Somchem S341 | <<locked>> | 84% | 48,022 psi | 87% | 2333 fps | 99.6% |
| Somchem S355 | <<locked>> | 92% | 49,081 psi | 89% | 2365 fps | 99.9% |
| Somchem S365ᴾ | <<locked>> | 100% | 46,079 psi | 84% | 2418 fps | 100% |
| Vihtavuori N133 | <<locked>> | 84% | 48,878 psi | 89% | 2244 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 46,934 psi | 85% | 2274 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 47,776 psi | 87% | 2290 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 47,181 psi | 86% | 2310 fps | 100% |
| Vihtavuori N160 | <<locked>> | 96% | 47,703 psi | 87% | 2369 fps | 98.9% |
| Vihtavuori N530 | <<locked>> | 82% | 47,398 psi | 86% | 2300 fps | 100% |
| Vihtavuori N540 | <<locked>> | 88% | 48,979 psi | 89% | 2326 fps | 100% |
| Vihtavuori N550 | <<locked>> | 98% | 49,864 psi | 90% | 2421 fps | 99.1% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 38,885 psi | 71% | 2316 fps | 98.2% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 47,921 psi | 87% | 2356 fps | 99.9% |
| Winchester 748 | <<locked>> | 82% | 46,760 psi | 85% | 2339 fps | 100% |
| Winchester 760 | <<locked>> | 96% | 48,805 psi | 89% | 2425 fps | 97.1% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 32,198 psi | 58% | 2238 fps | 97.6% |
| Winchester StaBALL Match | <<locked>> | 86% | 48,950 psi | 89% | 2369 fps | 99.9% |
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% | 46,137 psi | 84% | 2224 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 38,638 psi | 70% | 2162 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 45,223 psi | 82% | 2287 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 46,760 psi | 85% | 2270 fps | 95.5% |
| Accurate 4064 | <<locked>> | 80% | 36,564 psi | 66% | 2159 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 32,387 psi | 59% | 2139 fps | 95.4% |
| ADI AR 2206H | <<locked>> | 80% | 42,308 psi | 77% | 2254 fps | 99.1% |
| ADI AR 2208 | <<locked>> | 80% | 36,158 psi | 66% | 2129 fps | 97.2% |
| ADI Benchmark 8208 | <<locked>> | 80% | 44,353 psi | 80% | 2260 fps | 99.8% |
| Alliant AR-Comp | <<locked>> | 80% | 44,280 psi | 80% | 2247 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 38,159 psi | 69% | 2274 fps | 97.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 35,578 psi | 65% | 2149 fps | 98.5% |
| Alliant Reloder-15 | <<locked>> | 80% | 38,116 psi | 69% | 2198 fps | 97.9% |
| Alliant Reloder-16 | <<locked>> | 86% | 33,286 psi | 60% | 2152 fps | 95.6% |
| Alliant Reloder-17 | 48.7 gr | 80% | 30,589 psi | 56% | 2116 fps | 96.4% |
| Alliant Reloder-23 | <<locked>> | 92% | 28,442 psi | 52% | 2067 fps | 95% |
| Alliant Reloder-26 | <<locked>> | 96% | 34,766 psi | 63% | 2267 fps | 95.2% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 41,205 psi | 75% | 2254 fps | 98.1% |
| Bofors RP3 | <<locked>> | 80% | 34,896 psi | 63% | 2149 fps | 98.5% |
| Bofors RP7 | <<locked>> | 90% | 43,700 psi | 79% | 2257 fps | 95% |
| Hodgdon Benchmark | <<locked>> | 80% | 46,238 psi | 84% | 2251 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 42,743 psi | 78% | 2277 fps | 99.9% |
| Hodgdon H380 | <<locked>> | 80% | 35,810 psi | 65% | 2149 fps | 95.9% |
| Hodgdon H414 | 54.8 gr | 92% | 42,815 psi | 78% | 2329 fps | 95.6% |
| Hodgdon H4350 | <<locked>> | 92% | 47,021 psi | 85% | 2349 fps | 95.1% |
| Hodgdon H4895 | <<locked>> | 80% | 42,670 psi | 77% | 2264 fps | 99.4% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 28,529 psi | 52% | 2018 fps | 95.6% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 38,566 psi | 70% | 2241 fps | 99.2% |
| Hodgdon Superformance | <<locked>> | 94% | 45,905 psi | 83% | 2395 fps | 95.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,194 psi | 48% | 1283 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 41,089 psi | 75% | 2224 fps | 99.2% |
| IMR 3031 | <<locked>> | 80% | 42,279 psi | 77% | 2257 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 37,942 psi | 69% | 2156 fps | 97.9% |
| IMR 4166 Enduron | <<locked>> | 82% | 42,844 psi | 78% | 2215 fps | 95.4% |
| IMR 4350 | <<locked>> | 96% | 46,180 psi | 84% | 2323 fps | 95.7% |
| IMR 4451 Enduron | <<locked>> | 88% | 42,598 psi | 77% | 2241 fps | 95.2% |
| IMR 4831 | <<locked>> | 86% | 31,633 psi | 57% | 2106 fps | 95.1% |
| IMR 4895 | <<locked>> | 80% | 39,044 psi | 71% | 2224 fps | 98.6% |
| IMR 8208 XBR | <<locked>> | 80% | 44,353 psi | 80% | 2260 fps | 99.8% |
| Lovex D073.6 | <<locked>> | 80% | 41,104 psi | 75% | 2234 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 42,757 psi | 78% | 2201 fps | 99.1% |
| Lovex S062 | <<locked>> | 80% | 37,797 psi | 69% | 2162 fps | 99.2% |
| Lovex S065 | <<locked>> | 86% | 37,159 psi | 67% | 2152 fps | 95.3% |
| Lovex S070 | <<locked>> | 92% | 42,264 psi | 77% | 2264 fps | 95.6% |
| Norma 201 | <<locked>> | 80% | 41,495 psi | 75% | 2215 fps | 99.6% |
| Norma 202 | <<locked>> | 80% | 41,829 psi | 76% | 2221 fps | 100% |
| Norma 203B | <<locked>> | 80% | 37,507 psi | 68% | 2188 fps | 98.2% |
| Norma URP | <<locked>> | 86% | 33,156 psi | 60% | 2146 fps | 95.4% |
| Ramshot Big Game | <<locked>> | 80% | 36,796 psi | 67% | 2198 fps | 97.9% |
| Ramshot Hunter | <<locked>> | 92% | 39,175 psi | 71% | 2267 fps | 95.4% |
| Ramshot TAC | <<locked>> | 80% | 44,324 psi | 80% | 2267 fps | 97.4% |
| Ramshot Wild Boar | <<locked>> | 80% | 43,540 psi | 79% | 2283 fps | 99.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,498 psi | 48% | 1316 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 38,827 psi | 70% | 2182 fps | 95% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 39,610 psi | 72% | 2283 fps | 98.3% |
| ReloadSwiss RS 60 | 48.7 gr | 80% | 32,547 psi | 59% | 2172 fps | 99.3% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 34,548 psi | 63% | 2201 fps | 95.7% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 37,347 psi | 68% | 2257 fps | 95.7% |
| Rottweil R 901 | <<locked>> | 80% | 45,513 psi | 83% | 2247 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 39,682 psi | 72% | 2175 fps | 99.4% |
| Rottweil R 903 | <<locked>> | 80% | 32,851 psi | 60% | 2100 fps | 97.7% |
| Rottweil R 907 | <<locked>> | 90% | 43,700 psi | 79% | 2257 fps | 95% |
| Shooters World Long Rifle | <<locked>> | 86% | 37,159 psi | 67% | 2152 fps | 95.3% |
| Shooters World Match Rifle | <<locked>> | 80% | 41,104 psi | 75% | 2234 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 37,797 psi | 69% | 2162 fps | 99.2% |
| Shooters World SW4350 | <<locked>> | 92% | 42,264 psi | 77% | 2264 fps | 95.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 33,794 psi | 61% | 2142 fps | 97.1% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 42,380 psi | 77% | 2244 fps | 97.6% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 40,756 psi | 74% | 2228 fps | 98.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 43,062 psi | 78% | 2172 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 35,650 psi | 65% | 2064 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 41,321 psi | 75% | 2192 fps | 95.1% |
| Somchem S335 | <<locked>> | 80% | 42,554 psi | 77% | 2175 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 41,989 psi | 76% | 2241 fps | 98.9% |
| Somchem S355 | <<locked>> | 80% | 33,837 psi | 61% | 2106 fps | 97.7% |
| Somchem S365 | <<locked>> | 80% | 24,555 psi | 45% | 1962 fps | 95% |
| Vihtavuori N133 | <<locked>> | 80% | 43,294 psi | 79% | 2169 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 38,856 psi | 71% | 2159 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 39,436 psi | 72% | 2165 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 32,126 psi | 58% | 2054 fps | 98.4% |
| Vihtavuori N160 | <<locked>> | 84% | 32,401 psi | 59% | 2096 fps | 95% |
| Vihtavuori N530 | <<locked>> | 80% | 44,367 psi | 81% | 2254 fps | 99.9% |
| Vihtavuori N540 | <<locked>> | 80% | 37,898 psi | 69% | 2159 fps | 100% |
| Vihtavuori N550 | <<locked>> | 86% | 33,968 psi | 62% | 2149 fps | 95.5% |
| Vihtavuori N555 | <<locked>> | 92% | 30,110 psi | 55% | 2129 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 28,514 psi | 52% | 1988 fps | 95.5% |
| Winchester 748 | <<locked>> | 80% | 43,801 psi | 79% | 2297 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 42,815 psi | 78% | 2329 fps | 95.6% |
| Winchester StaBALL HD | <<locked>> | 96% | 28,413 psi | 52% | 2129 fps | 95.3% |
| Winchester StaBALL Match | <<locked>> | 80% | 40,030 psi | 73% | 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 90 powders for 8.5 x 63 R loaded with the .338 | 250gr | Swift A-Frame. ReloadSwiss RS 70 delivers the highest muzzle velocity at 2,467 fps; across all powders the maximum-charge window runs from 1,444 fps to 2,467 fps. Alliant Reloder-23 gives the best case fill at 100 %, and 90 of the 90 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (380 MPa), the top charges use 58–90 %, 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. Alliant Reloder-23, Alliant Reloder-26, Hodgdon Hybrid 100V 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 Reloder-17, Hodgdon H414 rank at the top here: for 8.5 x 63 R with the .338 | 250gr | Swift A-Frame 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.