Load Specifications
Load data in caliber 8.5 x 63 R with .338 | 275gr | Alaska Bullet Works Kodiak SP SPBC 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 70, 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.
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Max Load - Barrel Length: 23.62"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2495 | <<locked>> | 86% | 49,313 psi | 89% | 2182 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 48,776 psi | 89% | 2185 fps | 96.9% |
| Accurate 3100ᴾ | <<locked>> | 100% | 39,320 psi | 71% | 2149 fps | 96.7% |
| Accurate 4064 | <<locked>> | 88% | 49,371 psi | 90% | 2224 fps | 100% |
| Accurate 4350 | <<locked>> | 96% | 48,370 psi | 88% | 2293 fps | 99.6% |
| ADI AR 2206H | <<locked>> | 82% | 47,007 psi | 85% | 2205 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 88% | 47,892 psi | 87% | 2208 fps | 99.7% |
| ADI Benchmark 8208 | <<locked>> | 82% | 49,182 psi | 89% | 2205 fps | 100% |
| Alliant AR-Comp | <<locked>> | 82% | 49,632 psi | 90% | 2182 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 48,994 psi | 89% | 2339 fps | 99.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 47,790 psi | 87% | 2228 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 48,356 psi | 88% | 2244 fps | 99.8% |
| Alliant Reloder-16 | <<locked>> | 96% | 47,224 psi | 86% | 2300 fps | 99.7% |
| Alliant Reloder-17 | <<locked>> | 92% | 47,688 psi | 87% | 2326 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 38,000 psi | 69% | 2175 fps | 99.4% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 42,003 psi | 76% | 2306 fps | 98.7% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 49,298 psi | 89% | 2260 fps | 99.7% |
| Bofors RP3 | <<locked>> | 88% | 47,732 psi | 87% | 2238 fps | 100% |
| Bofors RP7 | <<locked>> | 92% | 48,414 psi | 88% | 2215 fps | 97.1% |
| Hodgdon BL-C2 | <<locked>> | 82% | 47,979 psi | 87% | 2231 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 48,863 psi | 89% | 2247 fps | 99.4% |
| Hodgdon H414 | <<locked>> | 94% | 47,935 psi | 87% | 2290 fps | 97.8% |
| Hodgdon H4350 | <<locked>> | 92% | 49,139 psi | 89% | 2260 fps | 96.6% |
| Hodgdon H4895 | <<locked>> | 82% | 47,427 psi | 86% | 2211 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 49,530 psi | 90% | 2280 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 49,414 psi | 90% | 2283 fps | 100% |
| Hodgdon Superformance | <<locked>> | 94% | 48,124 psi | 87% | 2316 fps | 97.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,621 psi | 65% | 1362 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 48,544 psi | 88% | 2215 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 47,340 psi | 86% | 2198 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 47,659 psi | 86% | 2195 fps | 99.8% |
| IMR 4166 Enduron | <<locked>> | 84% | 47,456 psi | 86% | 2175 fps | 97.5% |
| IMR 4350 | <<locked>> | 96% | 48,370 psi | 88% | 2238 fps | 97.2% |
| IMR 4451 Enduron | <<locked>> | 90% | 47,239 psi | 86% | 2198 fps | 97.3% |
| IMR 4831 | <<locked>> | 98% | 48,950 psi | 89% | 2287 fps | 99.7% |
| IMR 4895 | <<locked>> | 86% | 49,516 psi | 90% | 2267 fps | 100% |
| IMR 8208 XBR | <<locked>> | 82% | 49,182 psi | 89% | 2205 fps | 100% |
| Lovex D073.6 | <<locked>> | 84% | 49,400 psi | 90% | 2228 fps | 100% |
| Lovex S060 | <<locked>> | 82% | 47,137 psi | 86% | 2149 fps | 99.9% |
| Lovex S062 | <<locked>> | 86% | 47,500 psi | 86% | 2195 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 49,458 psi | 90% | 2238 fps | 98.9% |
| Lovex S070 | <<locked>> | 94% | 47,152 psi | 86% | 2224 fps | 97.7% |
| Norma 201 | <<locked>> | 84% | 48,950 psi | 89% | 2201 fps | 100% |
| Norma 202 | <<locked>> | 84% | 49,429 psi | 90% | 2205 fps | 100% |
| Norma 203B | <<locked>> | 86% | 47,587 psi | 86% | 2234 fps | 99.9% |
| Norma 204 | <<locked>> | 96% | 48,298 psi | 88% | 2270 fps | 95.8% |
| Norma MRPᴾ | <<locked>> | 100% | 42,366 psi | 77% | 2274 fps | 96.2% |
| Norma URP | <<locked>> | 96% | 47,906 psi | 87% | 2283 fps | 99.5% |
| Ramshot Big Game | <<locked>> | 86% | 47,340 psi | 86% | 2251 fps | 99.9% |
| Ramshot Hunter | <<locked>> | 98% | 49,850 psi | 90% | 2326 fps | 98.8% |
| Ramshot TAC | <<locked>> | 82% | 49,037 psi | 89% | 2221 fps | 99% |
| Ramshot Wild Boar | <<locked>> | 82% | 48,704 psi | 88% | 2238 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,940 psi | 65% | 1394 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 49,240 psi | 89% | 2234 fps | 98.3% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 48,109 psi | 87% | 2293 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 47,485 psi | 86% | 2323 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 47,645 psi | 86% | 2310 fps | 99.4% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 47,877 psi | 87% | 2333 fps | 99.2% |
| Rottweil R 902 | <<locked>> | 86% | 49,429 psi | 90% | 2201 fps | 100% |
| Rottweil R 903 | <<locked>> | 90% | 47,892 psi | 87% | 2234 fps | 100% |
| Rottweil R 907 | <<locked>> | 92% | 48,414 psi | 88% | 2215 fps | 97.1% |
| Shooters World Long Rifle | <<locked>> | 94% | 49,458 psi | 90% | 2238 fps | 98.9% |
| Shooters World Match Rifle | <<locked>> | 84% | 49,400 psi | 90% | 2228 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 47,500 psi | 86% | 2195 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 47,152 psi | 86% | 2224 fps | 97.7% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 49,284 psi | 89% | 2283 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 47,500 psi | 86% | 2201 fps | 99.1% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 48,486 psi | 88% | 2228 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 47,500 psi | 86% | 2113 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 47,543 psi | 86% | 2119 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 49,487 psi | 90% | 2198 fps | 97.8% |
| Somchem S335 | <<locked>> | 82% | 47,007 psi | 85% | 2116 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 47,065 psi | 85% | 2198 fps | 99.9% |
| Somchem S355 | <<locked>> | 90% | 48,370 psi | 88% | 2231 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 48,718 psi | 88% | 2326 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 45,353 psi | 82% | 2231 fps | 96.5% |
| Vihtavuori N133 | <<locked>> | 82% | 47,834 psi | 87% | 2103 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 49,269 psi | 89% | 2175 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 46,717 psi | 85% | 2149 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 49,501 psi | 90% | 2215 fps | 100% |
| Vihtavuori N160 | <<locked>> | 94% | 47,181 psi | 86% | 2241 fps | 99.4% |
| Vihtavuori N530 | <<locked>> | 82% | 49,356 psi | 90% | 2205 fps | 100% |
| Vihtavuori N540 | <<locked>> | 86% | 47,950 psi | 87% | 2188 fps | 100% |
| Vihtavuori N550 | <<locked>> | 96% | 49,081 psi | 89% | 2287 fps | 99.5% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 41,321 psi | 75% | 2238 fps | 99.3% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 47,152 psi | 86% | 2224 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 49,139 psi | 89% | 2244 fps | 100% |
| Winchester 760 | <<locked>> | 94% | 48,182 psi | 87% | 2293 fps | 97.8% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 33,808 psi | 61% | 2182 fps | 99.4% |
| Winchester StaBALL Match | <<locked>> | 84% | 48,008 psi | 87% | 2231 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 2495 | <<locked>> | 80% | 40,640 psi | 74% | 2070 fps | 100% |
| Accurate 2700 | <<locked>> | 82% | 42,757 psi | 78% | 2096 fps | 95.5% |
| Accurate 3100 | <<locked>> | 96% | 34,403 psi | 62% | 2064 fps | 95.2% |
| Accurate 4064 | <<locked>> | 80% | 38,479 psi | 70% | 2070 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 29,979 psi | 54% | 1978 fps | 95.6% |
| ADI AR 2206H | <<locked>> | 80% | 44,193 psi | 80% | 2162 fps | 99.7% |
| ADI AR 2208 | <<locked>> | 80% | 37,681 psi | 68% | 2047 fps | 98.4% |
| ADI Benchmark 8208 | <<locked>> | 80% | 46,253 psi | 84% | 2165 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 46,760 psi | 85% | 2149 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 39,987 psi | 73% | 2195 fps | 98.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 37,275 psi | 68% | 2067 fps | 99.4% |
| Alliant Reloder-15 | <<locked>> | 80% | 39,958 psi | 73% | 2116 fps | 98.9% |
| Alliant Reloder-16 | <<locked>> | 82% | 30,792 psi | 56% | 1988 fps | 95.7% |
| Alliant Reloder-17 | 47 gr | 80% | 32,024 psi | 58% | 2047 fps | 98.1% |
| Alliant Reloder-23 | <<locked>> | 88% | 26,513 psi | 48% | 1919 fps | 95.3% |
| Alliant Reloder-26 | <<locked>> | 92% | 32,053 psi | 58% | 2103 fps | 95.4% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 43,221 psi | 78% | 2172 fps | 99.1% |
| Bofors RP3 | <<locked>> | 80% | 36,782 psi | 67% | 2070 fps | 99.4% |
| Bofors RP7 | <<locked>> | 86% | 40,306 psi | 73% | 2087 fps | 95.1% |
| Hodgdon BL-C2 | <<locked>> | 80% | 44,860 psi | 81% | 2188 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 37,652 psi | 68% | 2073 fps | 97.4% |
| Hodgdon H414 | <<locked>> | 88% | 39,552 psi | 72% | 2156 fps | 95.8% |
| Hodgdon H4350 | <<locked>> | 88% | 43,250 psi | 78% | 2169 fps | 95.2% |
| Hodgdon H4895 | <<locked>> | 80% | 44,570 psi | 81% | 2172 fps | 99.9% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 26,629 psi | 48% | 1870 fps | 95.8% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 40,466 psi | 73% | 2152 fps | 99.8% |
| Hodgdon Superformance | <<locked>> | 90% | 41,872 psi | 76% | 2215 fps | 95.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,498 psi | 48% | 1214 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 42,888 psi | 78% | 2136 fps | 99.8% |
| IMR 3031 | <<locked>> | 80% | 44,338 psi | 80% | 2162 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 39,566 psi | 72% | 2070 fps | 98.9% |
| IMR 4166 Enduron | <<locked>> | 80% | 42,090 psi | 76% | 2090 fps | 96.2% |
| IMR 4350 | <<locked>> | 90% | 40,118 psi | 73% | 2110 fps | 95.1% |
| IMR 4451 Enduron | <<locked>> | 84% | 39,465 psi | 72% | 2073 fps | 95.4% |
| IMR 4831 | <<locked>> | 82% | 29,283 psi | 53% | 1946 fps | 95.3% |
| IMR 4895 | <<locked>> | 80% | 40,872 psi | 74% | 2139 fps | 99.4% |
| IMR 8208 XBR | <<locked>> | 80% | 46,253 psi | 84% | 2165 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 43,337 psi | 79% | 2146 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 44,338 psi | 80% | 2110 fps | 99.7% |
| Lovex S062 | <<locked>> | 80% | 39,494 psi | 72% | 2073 fps | 99.8% |
| Lovex S065 | <<locked>> | 82% | 34,389 psi | 62% | 1991 fps | 95.5% |
| Lovex S070 | <<locked>> | 86% | 36,970 psi | 67% | 2057 fps | 95.1% |
| Norma 201 | <<locked>> | 80% | 43,294 psi | 79% | 2123 fps | 100% |
| Norma 202 | <<locked>> | 80% | 43,671 psi | 79% | 2126 fps | 100% |
| Norma 203B | <<locked>> | 80% | 39,334 psi | 71% | 2106 fps | 99.2% |
| Norma 204 | <<locked>> | 94% | 45,411 psi | 82% | 2228 fps | 95% |
| Norma MRP | <<locked>> | 98% | 39,610 psi | 72% | 2224 fps | 95.3% |
| Norma URP | <<locked>> | 82% | 30,603 psi | 56% | 1982 fps | 95.6% |
| Ramshot Big Game | <<locked>> | 80% | 38,682 psi | 70% | 2119 fps | 99% |
| Ramshot Hunter | <<locked>> | 88% | 36,245 psi | 66% | 2103 fps | 95.6% |
| Ramshot TAC | <<locked>> | 80% | 45,992 psi | 83% | 2178 fps | 98.5% |
| Ramshot Wild Boar | <<locked>> | 80% | 45,600 psi | 83% | 2195 fps | 99.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,861 psi | 49% | 1243 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 38,043 psi | 69% | 2057 fps | 95.8% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 41,974 psi | 76% | 2201 fps | 99.3% |
| ReloadSwiss RS 60 | 47 gr | 80% | 34,069 psi | 62% | 2096 fps | 99.9% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 31,908 psi | 58% | 2037 fps | 95.9% |
| ReloadSwiss RS 70 | 51.3 gr | 86% | 34,345 psi | 62% | 2087 fps | 95.8% |
| Rottweil R 902 | <<locked>> | 80% | 41,321 psi | 75% | 2087 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 80% | 34,621 psi | 63% | 2024 fps | 98.8% |
| Rottweil R 907 | <<locked>> | 86% | 40,306 psi | 73% | 2087 fps | 95.1% |
| Shooters World Long Rifle | <<locked>> | 82% | 34,389 psi | 62% | 1991 fps | 95.5% |
| Shooters World Match Rifle | <<locked>> | 80% | 43,337 psi | 79% | 2146 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 39,494 psi | 72% | 2073 fps | 99.8% |
| Shooters World SW4350 | <<locked>> | 86% | 36,970 psi | 67% | 2057 fps | 95.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 35,578 psi | 65% | 2067 fps | 98.4% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 44,411 psi | 81% | 2159 fps | 98.7% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 42,714 psi | 78% | 2142 fps | 99.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 44,817 psi | 81% | 2077 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 37,289 psi | 68% | 1975 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 38,189 psi | 69% | 2031 fps | 95.2% |
| Somchem S335 | <<locked>> | 80% | 44,222 psi | 80% | 2080 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 43,990 psi | 80% | 2152 fps | 99.6% |
| Somchem S355 | <<locked>> | 80% | 35,476 psi | 64% | 2028 fps | 98.8% |
| Somchem S365 | <<locked>> | 80% | 25,817 psi | 47% | 1903 fps | 97.1% |
| Somchem S385 | <<locked>> | 96% | 40,001 psi | 73% | 2149 fps | 95.1% |
| Vihtavuori N133 | <<locked>> | 80% | 45,179 psi | 82% | 2070 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 40,857 psi | 74% | 2067 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 41,263 psi | 75% | 2073 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 33,692 psi | 61% | 1975 fps | 99.4% |
| Vihtavuori N160 | <<locked>> | 80% | 30,023 psi | 54% | 1939 fps | 95.2% |
| Vihtavuori N530 | <<locked>> | 80% | 46,354 psi | 84% | 2162 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 39,740 psi | 72% | 2070 fps | 100% |
| Vihtavuori N550 | <<locked>> | 82% | 31,357 psi | 57% | 1985 fps | 95.6% |
| Vihtavuori N555 | <<locked>> | 88% | 28,181 psi | 51% | 1978 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 29,849 psi | 54% | 1923 fps | 97.3% |
| Winchester 748 | <<locked>> | 80% | 45,905 psi | 83% | 2201 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 37,202 psi | 68% | 2113 fps | 95% |
| Winchester StaBALL HD | <<locked>> | 92% | 26,426 psi | 48% | 1978 fps | 95.7% |
| Winchester StaBALL Match | <<locked>> | 80% | 41,959 psi | 76% | 2142 fps | 99.8% |
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 109 powders for 8.5 x 63 R loaded with the .338 | 275gr | Alaska Bullet Works Kodiak SP SPBC. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,339 fps; across all powders the maximum-charge window runs from 1,362 fps to 2,339 fps. Accurate 3100 gives the best case fill at 100 %, and 109 of the 109 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (380 MPa), the top charges use 60–90 %, leaving at least 10 % headroom. The 275.0 gr projectile in 0.338" calls for a 1:15.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2209, ADI AR 2213 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 70, Alliant Reloder-17, ReloadSwiss RS 60 rank at the top here: for 8.5 x 63 R with the .338 | 275gr | Alaska Bullet Works Kodiak SP SPBC they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AR 2213, Alliant Reloder-22, Alliant Reloder-25 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.