Load Specifications
Load data in caliber 8.5 x 63 with .338 | 275gr | Alaska Bullet Works Kodiak SP SPBC bullet and 101 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-17, ReloadSwiss RS 60 and Alliant Power Pro 2000-MR.
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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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% | 54,331 psi | 87% | 2198 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 55,941 psi | 90% | 2260 fps | 100% |
| Accurate 2495 | <<locked>> | 90% | 56,028 psi | 90% | 2257 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 54,317 psi | 87% | 2277 fps | 100% |
| Accurate 2700 | <<locked>> | 90% | 55,317 psi | 89% | 2270 fps | 98% |
| Accurate 3100ᴾ | <<locked>> | 100% | 39,320 psi | 63% | 2149 fps | 96.7% |
| Accurate 4064 | <<locked>> | 92% | 55,898 psi | 90% | 2300 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 55,317 psi | 89% | 2379 fps | 100% |
| ADI AR 2206H | <<locked>> | 86% | 53,316 psi | 85% | 2290 fps | 100% |
| ADI AR 2208 | <<locked>> | 92% | 54,041 psi | 87% | 2290 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 86% | 55,782 psi | 89% | 2287 fps | 100% |
| Alliant AR-Comp | <<locked>> | 84% | 53,026 psi | 85% | 2218 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 90% | 56,130 psi | 90% | 2434 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 53,998 psi | 87% | 2306 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 90% | 54,563 psi | 87% | 2326 fps | 100% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 53,417 psi | 86% | 2382 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 96% | 54,331 psi | 87% | 2411 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 38,000 psi | 61% | 2175 fps | 99.4% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 42,003 psi | 67% | 2306 fps | 98.7% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 56,202 psi | 90% | 2346 fps | 100% |
| Bofors RP3 | <<locked>> | 92% | 54,447 psi | 87% | 2320 fps | 100% |
| Bofors RP7 | <<locked>> | 96% | 54,737 psi | 88% | 2300 fps | 98.2% |
| Hodgdon Benchmark | <<locked>> | 84% | 54,085 psi | 87% | 2228 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 86% | 54,810 psi | 88% | 2316 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 82% | 53,214 psi | 85% | 2356 fps | 100% |
| Hodgdon H380 | <<locked>> | 92% | 55,666 psi | 89% | 2336 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 98% | 54,621 psi | 88% | 2379 fps | 98.8% |
| Hodgdon H4350 | <<locked>> | 96% | 55,782 psi | 89% | 2349 fps | 97.8% |
| Hodgdon H4895 | <<locked>> | 86% | 53,882 psi | 86% | 2297 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 49,530 psi | 79% | 2280 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 88% | 52,866 psi | 85% | 2326 fps | 100% |
| Hodgdon Superformance | <<locked>> | 98% | 55,506 psi | 89% | 2418 fps | 98.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,621 psi | 57% | 1362 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 54,839 psi | 88% | 2297 fps | 100% |
| IMR 3031 | <<locked>> | 86% | 53,911 psi | 86% | 2277 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 53,592 psi | 86% | 2274 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 88% | 53,824 psi | 86% | 2260 fps | 98.5% |
| IMR 4350ᴾ | <<locked>> | 100% | 54,636 psi | 88% | 2320 fps | 98.2% |
| IMR 4451 Enduron | <<locked>> | 94% | 53,229 psi | 85% | 2283 fps | 98.4% |
| IMR 4831ᴾ | <<locked>> | 100% | 52,460 psi | 84% | 2329 fps | 99.9% |
| IMR 4895 | <<locked>> | 90% | 55,956 psi | 90% | 2349 fps | 100% |
| IMR 8208 XBR | <<locked>> | 86% | 55,782 psi | 89% | 2287 fps | 100% |
| Lovex D073.5 | <<locked>> | 82% | 55,941 psi | 90% | 2274 fps | 100% |
| Lovex D073.6 | <<locked>> | 88% | 56,333 psi | 90% | 2306 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 56,391 psi | 90% | 2267 fps | 100% |
| Lovex S062 | <<locked>> | 90% | 53,374 psi | 86% | 2270 fps | 100% |
| Lovex S065 | <<locked>> | 98% | 55,753 psi | 89% | 2316 fps | 99.5% |
| Lovex S070 | <<locked>> | 98% | 53,214 psi | 85% | 2306 fps | 98.7% |
| Norma 201 | <<locked>> | 88% | 55,317 psi | 89% | 2280 fps | 100% |
| Norma 202 | <<locked>> | 88% | 55,941 psi | 90% | 2280 fps | 100% |
| Norma 203B | <<locked>> | 90% | 53,809 psi | 86% | 2316 fps | 100% |
| Norma 204ᴾ | <<locked>> | 100% | 55,100 psi | 88% | 2362 fps | 97.2% |
| Norma MRPᴾ | <<locked>> | 100% | 42,366 psi | 68% | 2274 fps | 96.2% |
| Norma URPᴾ | <<locked>> | 100% | 54,360 psi | 87% | 2369 fps | 99.9% |
| Ramshot Big Game | <<locked>> | 90% | 54,128 psi | 87% | 2339 fps | 100% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 52,997 psi | 85% | 2369 fps | 99.2% |
| Ramshot TAC | <<locked>> | 86% | 55,738 psi | 89% | 2310 fps | 99.6% |
| Ramshot Wild Boar | <<locked>> | 86% | 55,506 psi | 89% | 2323 fps | 100% |
| Ramshot X-Terminator | <<locked>> | 82% | 53,011 psi | 85% | 2247 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,940 psi | 58% | 1394 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 55,100 psi | 88% | 2264 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 55,811 psi | 89% | 2320 fps | 99.2% |
| ReloadSwiss RS 52 | <<locked>> | 88% | 55,027 psi | 88% | 2382 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 54,085 psi | 87% | 2408 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 54,824 psi | 88% | 2402 fps | 99.9% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 54,781 psi | 88% | 2428 fps | 99.8% |
| Rottweil R 901 | <<locked>> | 84% | 53,301 psi | 85% | 2224 fps | 100% |
| Rottweil R 902 | <<locked>> | 90% | 55,811 psi | 89% | 2280 fps | 100% |
| Rottweil R 903 | <<locked>> | 94% | 54,331 psi | 87% | 2313 fps | 100% |
| Rottweil R 907 | <<locked>> | 96% | 54,737 psi | 88% | 2300 fps | 98.2% |
| Shooters World Long Rifle | <<locked>> | 98% | 55,753 psi | 89% | 2316 fps | 99.5% |
| Shooters World Match Rifle | <<locked>> | 88% | 56,333 psi | 90% | 2306 fps | 100% |
| Shooters World Precision | <<locked>> | 90% | 53,374 psi | 86% | 2270 fps | 100% |
| Shooters World SW4350 | <<locked>> | 98% | 53,214 psi | 85% | 2306 fps | 98.7% |
| SNPE Vectan SP 11 | <<locked>> | 94% | 56,028 psi | 90% | 2369 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 54,302 psi | 87% | 2293 fps | 99.7% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 54,940 psi | 88% | 2310 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 53,867 psi | 86% | 2188 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 53,548 psi | 86% | 2188 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 56,202 psi | 90% | 2280 fps | 98.7% |
| Somchem S321 | <<locked>> | 82% | 53,185 psi | 85% | 2274 fps | 100% |
| Somchem S335 | <<locked>> | 88% | 56,188 psi | 90% | 2224 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 53,679 psi | 86% | 2280 fps | 100% |
| Somchem S355 | <<locked>> | 94% | 54,650 psi | 88% | 2310 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 48,718 psi | 78% | 2326 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 45,353 psi | 73% | 2231 fps | 96.5% |
| Vihtavuori N130 | <<locked>> | 82% | 53,505 psi | 86% | 2152 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 54,099 psi | 87% | 2175 fps | 100% |
| Vihtavuori N135 | <<locked>> | 90% | 55,637 psi | 89% | 2244 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 53,098 psi | 85% | 2228 fps | 100% |
| Vihtavuori N150 | <<locked>> | 96% | 56,101 psi | 90% | 2290 fps | 100% |
| Vihtavuori N160 | <<locked>> | 98% | 53,548 psi | 86% | 2323 fps | 99.8% |
| Vihtavuori N530 | <<locked>> | 86% | 56,246 psi | 90% | 2287 fps | 100% |
| Vihtavuori N540 | <<locked>> | 90% | 54,375 psi | 87% | 2264 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 55,796 psi | 89% | 2369 fps | 99.9% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 41,321 psi | 66% | 2238 fps | 99.3% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 53,809 psi | 86% | 2306 fps | 100% |
| Winchester 748 | <<locked>> | 86% | 55,927 psi | 90% | 2326 fps | 100% |
| Winchester 760 | <<locked>> | 98% | 54,882 psi | 88% | 2382 fps | 98.8% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 33,808 psi | 54% | 2182 fps | 99.4% |
| Winchester StaBALL Match | <<locked>> | 88% | 54,824 psi | 88% | 2316 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% | 48,196 psi | 77% | 2126 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 52,620 psi | 84% | 2224 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 40,640 psi | 65% | 2070 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 47,398 psi | 76% | 2192 fps | 100% |
| Accurate 2700 | <<locked>> | 82% | 42,757 psi | 69% | 2096 fps | 95.5% |
| Accurate 3100 | <<locked>> | 96% | 34,403 psi | 55% | 2064 fps | 95.2% |
| Accurate 4064 | <<locked>> | 80% | 38,479 psi | 62% | 2070 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 29,979 psi | 48% | 1978 fps | 95.6% |
| ADI AR 2206H | <<locked>> | 80% | 44,193 psi | 71% | 2162 fps | 99.7% |
| ADI AR 2208 | <<locked>> | 80% | 37,681 psi | 60% | 2047 fps | 98.4% |
| ADI Benchmark 8208 | <<locked>> | 80% | 46,253 psi | 74% | 2165 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 46,760 psi | 75% | 2149 fps | 100% |
| Alliant Power Pro 2000-MR | 47.7 gr | 80% | 39,987 psi | 64% | 2195 fps | 98.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 37,275 psi | 60% | 2067 fps | 99.4% |
| Alliant Reloder-15 | <<locked>> | 80% | 39,958 psi | 64% | 2116 fps | 98.9% |
| Alliant Reloder-16 | <<locked>> | 82% | 30,792 psi | 49% | 1988 fps | 95.7% |
| Alliant Reloder-17 | 47 gr | 80% | 32,024 psi | 51% | 2047 fps | 98.1% |
| Alliant Reloder-23 | <<locked>> | 88% | 26,513 psi | 43% | 1919 fps | 95.3% |
| Alliant Reloder-26 | <<locked>> | 92% | 32,053 psi | 51% | 2103 fps | 95.4% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 43,221 psi | 69% | 2172 fps | 99.1% |
| Bofors RP3 | <<locked>> | 80% | 36,782 psi | 59% | 2070 fps | 99.4% |
| Bofors RP7 | <<locked>> | 86% | 40,306 psi | 65% | 2087 fps | 95.1% |
| Hodgdon Benchmark | <<locked>> | 80% | 48,008 psi | 77% | 2152 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 44,860 psi | 72% | 2188 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 80% | 49,734 psi | 80% | 2310 fps | 99.9% |
| Hodgdon H380 | <<locked>> | 80% | 37,652 psi | 60% | 2073 fps | 97.4% |
| Hodgdon H414 | <<locked>> | 88% | 39,552 psi | 63% | 2156 fps | 95.8% |
| Hodgdon H4350 | <<locked>> | 88% | 43,250 psi | 69% | 2169 fps | 95.2% |
| Hodgdon H4895 | <<locked>> | 80% | 44,570 psi | 71% | 2172 fps | 99.9% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 26,629 psi | 43% | 1870 fps | 95.8% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 40,466 psi | 65% | 2152 fps | 99.8% |
| Hodgdon Superformance | <<locked>> | 90% | 41,872 psi | 67% | 2215 fps | 95.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,498 psi | 42% | 1214 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 42,888 psi | 69% | 2136 fps | 99.8% |
| IMR 3031 | <<locked>> | 80% | 44,338 psi | 71% | 2162 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 39,566 psi | 63% | 2070 fps | 98.9% |
| IMR 4166 Enduron | <<locked>> | 80% | 42,090 psi | 67% | 2090 fps | 96.2% |
| IMR 4350 | <<locked>> | 90% | 40,118 psi | 64% | 2110 fps | 95.1% |
| IMR 4451 Enduron | <<locked>> | 84% | 39,465 psi | 63% | 2073 fps | 95.4% |
| IMR 4831 | <<locked>> | 82% | 29,283 psi | 47% | 1946 fps | 95.3% |
| IMR 4895 | <<locked>> | 80% | 40,872 psi | 66% | 2139 fps | 99.4% |
| IMR 8208 XBR | <<locked>> | 80% | 46,253 psi | 74% | 2165 fps | 100% |
| Lovex D073.5 | <<locked>> | 80% | 52,344 psi | 84% | 2234 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 43,337 psi | 69% | 2146 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 44,338 psi | 71% | 2110 fps | 99.7% |
| Lovex S062 | <<locked>> | 80% | 39,494 psi | 63% | 2073 fps | 99.8% |
| Lovex S065 | <<locked>> | 82% | 34,389 psi | 55% | 1991 fps | 95.5% |
| Lovex S070 | <<locked>> | 86% | 36,970 psi | 59% | 2057 fps | 95.1% |
| Norma 201 | <<locked>> | 80% | 43,294 psi | 69% | 2123 fps | 100% |
| Norma 202 | <<locked>> | 80% | 43,671 psi | 70% | 2126 fps | 100% |
| Norma 203B | <<locked>> | 80% | 39,334 psi | 63% | 2106 fps | 99.2% |
| Norma 204 | <<locked>> | 94% | 45,411 psi | 73% | 2228 fps | 95% |
| Norma MRP | <<locked>> | 98% | 39,610 psi | 64% | 2224 fps | 95.3% |
| Norma URP | <<locked>> | 82% | 30,603 psi | 49% | 1982 fps | 95.6% |
| Ramshot Big Game | <<locked>> | 80% | 38,682 psi | 62% | 2119 fps | 99% |
| Ramshot Hunter | <<locked>> | 88% | 36,245 psi | 58% | 2103 fps | 95.6% |
| Ramshot TAC | <<locked>> | 80% | 45,992 psi | 74% | 2178 fps | 98.5% |
| Ramshot Wild Boar | <<locked>> | 80% | 45,600 psi | 73% | 2195 fps | 99.8% |
| Ramshot X-Terminator | <<locked>> | 80% | 49,734 psi | 80% | 2205 fps | 99.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,861 psi | 43% | 1243 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 51,837 psi | 83% | 2228 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 38,043 psi | 61% | 2057 fps | 95.8% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 41,974 psi | 67% | 2201 fps | 99.3% |
| ReloadSwiss RS 60 | 47 gr | 80% | 34,069 psi | 55% | 2096 fps | 99.9% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 31,908 psi | 51% | 2037 fps | 95.9% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 34,345 psi | 55% | 2087 fps | 95.8% |
| Rottweil R 901 | <<locked>> | 80% | 47,456 psi | 76% | 2149 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 41,321 psi | 66% | 2087 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 80% | 34,621 psi | 56% | 2024 fps | 98.8% |
| Rottweil R 907 | <<locked>> | 86% | 40,306 psi | 65% | 2087 fps | 95.1% |
| Shooters World Long Rifle | <<locked>> | 82% | 34,389 psi | 55% | 1991 fps | 95.5% |
| Shooters World Match Rifle | <<locked>> | 80% | 43,337 psi | 69% | 2146 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 39,494 psi | 63% | 2073 fps | 99.8% |
| Shooters World SW4350 | <<locked>> | 86% | 36,970 psi | 59% | 2057 fps | 95.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 35,578 psi | 57% | 2067 fps | 98.4% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 44,411 psi | 71% | 2159 fps | 98.7% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 42,714 psi | 68% | 2142 fps | 99.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 44,817 psi | 72% | 2077 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 37,289 psi | 60% | 1975 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 38,189 psi | 61% | 2031 fps | 95.2% |
| Somchem S321 | <<locked>> | 80% | 49,835 psi | 80% | 2231 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 44,222 psi | 71% | 2080 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 43,990 psi | 71% | 2152 fps | 99.6% |
| Somchem S355 | <<locked>> | 80% | 35,476 psi | 57% | 2028 fps | 98.8% |
| Somchem S365 | <<locked>> | 80% | 25,817 psi | 41% | 1903 fps | 97.1% |
| Somchem S385 | <<locked>> | 96% | 40,001 psi | 64% | 2149 fps | 95.1% |
| Vihtavuori N130 | <<locked>> | 80% | 50,589 psi | 81% | 2119 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 45,179 psi | 72% | 2070 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 40,857 psi | 66% | 2067 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 41,263 psi | 66% | 2073 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 33,692 psi | 54% | 1975 fps | 99.4% |
| Vihtavuori N160 | <<locked>> | 80% | 30,023 psi | 48% | 1939 fps | 95.2% |
| Vihtavuori N530 | <<locked>> | 80% | 46,354 psi | 74% | 2162 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 39,740 psi | 64% | 2070 fps | 100% |
| Vihtavuori N550 | <<locked>> | 82% | 31,357 psi | 50% | 1985 fps | 95.6% |
| Vihtavuori N555 | <<locked>> | 88% | 28,181 psi | 45% | 1978 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 29,849 psi | 48% | 1923 fps | 97.3% |
| Winchester 748 | <<locked>> | 80% | 45,905 psi | 74% | 2201 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 37,202 psi | 60% | 2113 fps | 95% |
| Winchester StaBALL HD | <<locked>> | 92% | 26,426 psi | 42% | 1978 fps | 95.7% |
| Winchester StaBALL Match | <<locked>> | 80% | 41,959 psi | 67% | 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 120 powders for 8.5 x 63 loaded with the .338 | 275gr | Alaska Bullet Works Kodiak SP SPBC. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,434 fps; across all powders the maximum-charge window runs from 1,362 fps to 2,434 fps. Accurate 3100 gives the best case fill at 100 %, and 120 of the 120 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 275.0 gr projectile in 0.338" calls for a 1:15.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate 4350, ADI AR 2209 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 Reloder-17, ReloadSwiss RS 60, Alliant Power Pro 2000-MR rank at the top here: for 8.5 x 63 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.