Load Specifications
Load data in caliber 8.5 x 55 Blaser with .338 | 280gr | Rhino Solid Shank bullet and 103 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, Hodgdon Superformance and Alliant Reloder-17.
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% | 54,897 psi | 88% | 2185 fps | 100% |
| Accurate 2495 | <<locked>> | 88% | 53,272 psi | 85% | 2211 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 55,013 psi | 88% | 2267 fps | 100% |
| Accurate 2700 | <<locked>> | 90% | 55,999 psi | 90% | 2264 fps | 98.4% |
| Accurate 3100ᴾ | <<locked>> | 100% | 40,045 psi | 64% | 2149 fps | 97.3% |
| Accurate 4064 | <<locked>> | 90% | 53,272 psi | 85% | 2254 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 56,246 psi | 90% | 2375 fps | 100% |
| ADI AR 2206H | <<locked>> | 86% | 53,925 psi | 86% | 2283 fps | 100% |
| ADI AR 2208 | <<locked>> | 92% | 54,723 psi | 88% | 2280 fps | 100% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 48,080 psi | 77% | 2270 fps | 96.1% |
| ADI Benchmark 8208 | <<locked>> | 86% | 56,376 psi | 90% | 2277 fps | 100% |
| Alliant AR-Comp | <<locked>> | 84% | 53,693 psi | 86% | 2211 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 88% | 53,127 psi | 85% | 2382 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 54,723 psi | 88% | 2300 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 90% | 55,245 psi | 89% | 2320 fps | 100% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 54,157 psi | 87% | 2379 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 96% | 55,158 psi | 88% | 2408 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 46,949 psi | 75% | 2260 fps | 96.1% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 38,566 psi | 62% | 2175 fps | 99.6% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 42,728 psi | 69% | 2310 fps | 99.1% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 53,287 psi | 85% | 2297 fps | 100% |
| Bofors RP3 | <<locked>> | 92% | 55,245 psi | 89% | 2313 fps | 100% |
| Bofors RP7 | <<locked>> | 96% | 55,405 psi | 89% | 2297 fps | 98.5% |
| Hodgdon Benchmark | <<locked>> | 84% | 54,911 psi | 88% | 2224 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 86% | 55,521 psi | 89% | 2306 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 82% | 54,012 psi | 87% | 2349 fps | 100% |
| Hodgdon H380 | <<locked>> | 92% | 56,391 psi | 90% | 2329 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 98% | 55,448 psi | 89% | 2375 fps | 99.1% |
| Hodgdon H4350 | <<locked>> | 94% | 52,895 psi | 85% | 2300 fps | 97.6% |
| Hodgdon H4895 | <<locked>> | 86% | 54,505 psi | 87% | 2290 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 50,285 psi | 81% | 2274 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 88% | 53,606 psi | 86% | 2320 fps | 100% |
| Hodgdon Superformance | <<locked>> | 98% | 56,289 psi | 90% | 2415 fps | 98.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,505 psi | 57% | 1352 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 55,463 psi | 89% | 2290 fps | 100% |
| IMR 3031 | <<locked>> | 86% | 54,592 psi | 88% | 2267 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 54,259 psi | 87% | 2267 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 88% | 54,389 psi | 87% | 2254 fps | 98.8% |
| IMR 4350ᴾ | <<locked>> | 100% | 55,361 psi | 89% | 2316 fps | 98.6% |
| IMR 4451 Enduron | <<locked>> | 94% | 53,838 psi | 86% | 2277 fps | 98.7% |
| IMR 4831ᴾ | <<locked>> | 100% | 53,287 psi | 85% | 2326 fps | 100% |
| IMR 4895 | <<locked>> | 88% | 53,330 psi | 86% | 2303 fps | 100% |
| IMR 8208 XBR | <<locked>> | 86% | 56,376 psi | 90% | 2277 fps | 100% |
| Lovex D073.6 | <<locked>> | 86% | 53,650 psi | 86% | 2260 fps | 100% |
| Lovex S060 | <<locked>> | 86% | 53,650 psi | 86% | 2221 fps | 100% |
| Lovex S062 | <<locked>> | 90% | 54,317 psi | 87% | 2264 fps | 100% |
| Lovex S065 | <<locked>> | 96% | 53,185 psi | 85% | 2274 fps | 99.5% |
| Lovex S070 | <<locked>> | 98% | 53,940 psi | 86% | 2303 fps | 98.9% |
| Norma 201 | <<locked>> | 88% | 55,941 psi | 90% | 2270 fps | 100% |
| Norma 202 | <<locked>> | 86% | 53,214 psi | 85% | 2234 fps | 100% |
| Norma 203B | <<locked>> | 90% | 54,476 psi | 87% | 2310 fps | 100% |
| Norma 204ᴾ | <<locked>> | 100% | 55,898 psi | 90% | 2362 fps | 97.6% |
| Norma MRPᴾ | <<locked>> | 100% | 42,801 psi | 69% | 2270 fps | 96.8% |
| Norma URPᴾ | <<locked>> | 100% | 55,187 psi | 88% | 2362 fps | 100% |
| Ramshot Big Game | <<locked>> | 90% | 54,897 psi | 88% | 2333 fps | 100% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 53,809 psi | 86% | 2365 fps | 99.4% |
| Ramshot TAC | <<locked>> | 84% | 52,895 psi | 85% | 2260 fps | 99.5% |
| Ramshot Wild Boar | <<locked>> | 86% | 56,188 psi | 90% | 2316 fps | 100% |
| Ramshot X-Terminator | <<locked>> | 82% | 53,577 psi | 86% | 2241 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,100 psi | 58% | 1385 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 56,014 psi | 90% | 2260 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 53,200 psi | 85% | 2277 fps | 99.1% |
| ReloadSwiss RS 52 | <<locked>> | 88% | 55,811 psi | 89% | 2375 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 54,882 psi | 88% | 2402 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 55,767 psi | 89% | 2398 fps | 100% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 55,608 psi | 89% | 2425 fps | 99.9% |
| Rottweil R 901 | <<locked>> | 84% | 53,867 psi | 86% | 2215 fps | 100% |
| Rottweil R 902 | <<locked>> | 88% | 53,113 psi | 85% | 2231 fps | 100% |
| Rottweil R 903 | <<locked>> | 94% | 55,129 psi | 88% | 2306 fps | 100% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 45,571 psi | 73% | 2247 fps | 96% |
| Rottweil R 907 | <<locked>> | 96% | 55,405 psi | 89% | 2297 fps | 98.5% |
| Shooters World Long Rifle | <<locked>> | 96% | 53,185 psi | 85% | 2274 fps | 99.5% |
| Shooters World Match Rifle | <<locked>> | 86% | 53,650 psi | 86% | 2260 fps | 100% |
| Shooters World Precision | <<locked>> | 90% | 54,317 psi | 87% | 2264 fps | 100% |
| Shooters World SW4350 | <<locked>> | 98% | 53,940 psi | 86% | 2303 fps | 98.9% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 53,200 psi | 85% | 2320 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 54,984 psi | 88% | 2287 fps | 99.8% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 55,593 psi | 89% | 2300 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 54,418 psi | 87% | 2178 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 54,215 psi | 87% | 2178 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 53,388 psi | 86% | 2234 fps | 98.6% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 45,179 psi | 72% | 2241 fps | 95.9% |
| Somchem S321 | <<locked>> | 82% | 53,853 psi | 86% | 2264 fps | 100% |
| Somchem S335 | <<locked>> | 86% | 53,519 psi | 86% | 2178 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 54,360 psi | 87% | 2274 fps | 100% |
| Somchem S355 | <<locked>> | 94% | 55,376 psi | 89% | 2303 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 49,574 psi | 79% | 2323 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 46,093 psi | 74% | 2231 fps | 97% |
| Vihtavuori N130 | <<locked>> | 82% | 54,317 psi | 87% | 2146 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 54,679 psi | 88% | 2165 fps | 100% |
| Vihtavuori N135 | <<locked>> | 90% | 56,318 psi | 90% | 2234 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 53,780 psi | 86% | 2218 fps | 100% |
| Vihtavuori N150 | <<locked>> | 94% | 53,417 psi | 86% | 2247 fps | 100% |
| Vihtavuori N160 | <<locked>> | 98% | 54,375 psi | 87% | 2316 fps | 99.9% |
| Vihtavuori N530 | <<locked>> | 84% | 53,417 psi | 86% | 2238 fps | 100% |
| Vihtavuori N540 | <<locked>> | 90% | 55,027 psi | 88% | 2257 fps | 100% |
| Vihtavuori N550 | <<locked>> | 98% | 53,258 psi | 85% | 2326 fps | 99.9% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 42,076 psi | 67% | 2234 fps | 99.5% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 54,578 psi | 88% | 2303 fps | 100% |
| Winchester 748 | <<locked>> | 84% | 53,258 psi | 85% | 2280 fps | 100% |
| Winchester 760 | <<locked>> | 98% | 55,709 psi | 89% | 2379 fps | 99.1% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 34,360 psi | 55% | 2188 fps | 99.7% |
| Winchester StaBALL Match | <<locked>> | 88% | 55,535 psi | 89% | 2310 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% | 48,704 psi | 78% | 2116 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 41,437 psi | 66% | 2067 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 48,327 psi | 77% | 2188 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 40,669 psi | 65% | 2051 fps | 95.3% |
| Accurate 3100 | <<locked>> | 94% | 32,837 psi | 53% | 2021 fps | 95% |
| Accurate 4064 | <<locked>> | 80% | 39,218 psi | 63% | 2067 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 28,485 psi | 46% | 1936 fps | 95.3% |
| ADI AR 2206H | <<locked>> | 80% | 44,730 psi | 72% | 2159 fps | 99.8% |
| ADI AR 2208 | <<locked>> | 80% | 38,101 psi | 61% | 2041 fps | 98.7% |
| ADI AR 2209 | <<locked>> | 98% | 45,208 psi | 72% | 2224 fps | 95.4% |
| ADI Benchmark 8208 | <<locked>> | 80% | 46,760 psi | 75% | 2159 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 47,369 psi | 76% | 2139 fps | 100% |
| Alliant Power Pro 2000-MR | 47.7 gr | 80% | 40,698 psi | 65% | 2195 fps | 99.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 37,753 psi | 61% | 2060 fps | 99.6% |
| Alliant Reloder-15 | <<locked>> | 80% | 40,422 psi | 65% | 2110 fps | 99.2% |
| Alliant Reloder-16 | <<locked>> | 80% | 29,472 psi | 47% | 1949 fps | 95.6% |
| Alliant Reloder-17 | 46.9 gr | 80% | 32,460 psi | 52% | 2047 fps | 98.5% |
| Alliant Reloder-19 | <<locked>> | 98% | 44,222 psi | 71% | 2221 fps | 95.4% |
| Alliant Reloder-23 | <<locked>> | 86% | 25,338 psi | 41% | 1877 fps | 95.1% |
| Alliant Reloder-26 | <<locked>> | 90% | 30,487 psi | 49% | 2057 fps | 95.1% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 43,758 psi | 70% | 2165 fps | 99.3% |
| Bofors RP3 | <<locked>> | 80% | 37,318 psi | 60% | 2067 fps | 99.6% |
| Bofors RP7 | <<locked>> | 86% | 40,799 psi | 65% | 2087 fps | 95.6% |
| Hodgdon Benchmark | <<locked>> | 80% | 48,689 psi | 78% | 2146 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 45,716 psi | 73% | 2185 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 80% | 50,415 psi | 81% | 2303 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 38,174 psi | 61% | 2070 fps | 97.8% |
| Hodgdon H414 | <<locked>> | 86% | 37,507 psi | 60% | 2106 fps | 95.5% |
| Hodgdon H4350 | <<locked>> | 86% | 41,205 psi | 66% | 2126 fps | 95% |
| Hodgdon H4895 | <<locked>> | 80% | 45,121 psi | 72% | 2165 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 26,948 psi | 43% | 1870 fps | 96.4% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 41,060 psi | 66% | 2149 fps | 99.9% |
| Hodgdon Superformance | 54.6 gr | 88% | 39,740 psi | 64% | 2169 fps | 95.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,600 psi | 43% | 1207 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 43,381 psi | 70% | 2129 fps | 99.9% |
| IMR 3031 | <<locked>> | 80% | 44,904 psi | 72% | 2152 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 39,987 psi | 64% | 2067 fps | 99.2% |
| IMR 4166 Enduron | <<locked>> | 80% | 42,511 psi | 68% | 2087 fps | 96.7% |
| IMR 4350 | <<locked>> | 90% | 40,886 psi | 66% | 2113 fps | 95.7% |
| IMR 4451 Enduron | <<locked>> | 82% | 37,536 psi | 60% | 2028 fps | 95.1% |
| IMR 4831 | <<locked>> | 80% | 27,876 psi | 45% | 1903 fps | 95% |
| IMR 4895 | <<locked>> | 80% | 41,423 psi | 66% | 2133 fps | 99.6% |
| IMR 8208 XBR | <<locked>> | 80% | 46,760 psi | 75% | 2159 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 43,888 psi | 70% | 2139 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 44,788 psi | 72% | 2103 fps | 99.8% |
| Lovex S062 | <<locked>> | 80% | 39,929 psi | 64% | 2070 fps | 99.9% |
| Lovex S065 | <<locked>> | 80% | 32,924 psi | 53% | 1949 fps | 95.3% |
| Lovex S070 | <<locked>> | 86% | 37,434 psi | 60% | 2054 fps | 95.6% |
| Norma 201 | <<locked>> | 80% | 44,034 psi | 71% | 2119 fps | 100% |
| Norma 202 | <<locked>> | 80% | 44,208 psi | 71% | 2119 fps | 100% |
| Norma 203B | <<locked>> | 80% | 39,798 psi | 64% | 2100 fps | 99.4% |
| Norma 204 | <<locked>> | 94% | 46,035 psi | 74% | 2228 fps | 95.6% |
| Norma MRP | <<locked>> | 96% | 37,623 psi | 60% | 2175 fps | 95% |
| Norma URP | <<locked>> | 80% | 29,138 psi | 47% | 1936 fps | 95.3% |
| Ramshot Big Game | <<locked>> | 80% | 39,407 psi | 63% | 2119 fps | 99.3% |
| Ramshot Hunter | <<locked>> | 86% | 34,621 psi | 56% | 2060 fps | 95.4% |
| Ramshot TAC | <<locked>> | 80% | 46,528 psi | 75% | 2172 fps | 98.8% |
| Ramshot Wild Boar | <<locked>> | 80% | 46,137 psi | 74% | 2188 fps | 99.9% |
| Ramshot X-Terminator | <<locked>> | 80% | 50,256 psi | 81% | 2198 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,992 psi | 43% | 1237 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 52,373 psi | 84% | 2218 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 38,479 psi | 62% | 2054 fps | 96.3% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 42,612 psi | 68% | 2198 fps | 99.5% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 34,548 psi | 55% | 2096 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 30,298 psi | 49% | 1991 fps | 95.6% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 32,619 psi | 52% | 2041 fps | 95.5% |
| Rottweil R 901 | <<locked>> | 80% | 47,979 psi | 77% | 2142 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 41,756 psi | 67% | 2080 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 35,099 psi | 56% | 2021 fps | 99.1% |
| Rottweil R 905 | <<locked>> | 98% | 42,801 psi | 69% | 2205 fps | 95.3% |
| Rottweil R 907 | <<locked>> | 86% | 40,799 psi | 65% | 2087 fps | 95.6% |
| Shooters World Long Rifle | <<locked>> | 80% | 32,924 psi | 53% | 1949 fps | 95.3% |
| Shooters World Match Rifle | <<locked>> | 80% | 43,888 psi | 70% | 2139 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 39,929 psi | 64% | 2070 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 86% | 37,434 psi | 60% | 2054 fps | 95.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 36,071 psi | 58% | 2064 fps | 98.8% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 44,976 psi | 72% | 2156 fps | 99% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 43,207 psi | 69% | 2136 fps | 99.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 45,295 psi | 73% | 2070 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 37,681 psi | 60% | 1969 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 36,303 psi | 58% | 1985 fps | 95% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 42,438 psi | 68% | 2198 fps | 95.1% |
| Somchem S321 | <<locked>> | 80% | 50,415 psi | 81% | 2224 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 44,962 psi | 72% | 2073 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 44,585 psi | 71% | 2149 fps | 99.8% |
| Somchem S355 | <<locked>> | 80% | 36,143 psi | 58% | 2028 fps | 99.2% |
| Somchem S365 | <<locked>> | 80% | 26,194 psi | 42% | 1903 fps | 97.6% |
| Somchem S385 | <<locked>> | 96% | 40,640 psi | 65% | 2149 fps | 95.7% |
| Vihtavuori N130 | <<locked>> | 80% | 51,082 psi | 82% | 2110 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 45,614 psi | 73% | 2060 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 41,365 psi | 66% | 2057 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 41,756 psi | 67% | 2067 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 34,127 psi | 55% | 1972 fps | 99.6% |
| Vihtavuori N160 | <<locked>> | 80% | 30,414 psi | 49% | 1939 fps | 95.8% |
| Vihtavuori N530 | <<locked>> | 80% | 46,891 psi | 75% | 2156 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 40,219 psi | 64% | 2064 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 29,863 psi | 48% | 1942 fps | 95.4% |
| Vihtavuori N555 | <<locked>> | 86% | 26,919 psi | 43% | 1936 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 30,197 psi | 48% | 1923 fps | 97.8% |
| Winchester 748 | <<locked>> | 80% | 46,485 psi | 75% | 2195 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 37,710 psi | 60% | 2110 fps | 95.5% |
| Winchester StaBALL HD | <<locked>> | 90% | 25,280 psi | 41% | 1939 fps | 95.4% |
| Winchester StaBALL Match | <<locked>> | 80% | 42,743 psi | 69% | 2142 fps | 99.9% |
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 121 powders for 8.5 x 55 Blaser loaded with the .338 | 280gr | Rhino Solid Shank. ReloadSwiss RS 70 delivers the highest muzzle velocity at 2,425 fps; across all powders the maximum-charge window runs from 1,352 fps to 2,425 fps. Accurate 3100 gives the best case fill at 100 %, and 121 of the 121 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (430 MPa), the top charges use 54–90 %, leaving at least 10 % headroom. The 280.0 gr projectile in 0.338" calls for a 1:14.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate 4350, Accurate MAGPRO 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, Hodgdon Superformance, Alliant Reloder-17 rank at the top here: for 8.5 x 55 Blaser with the .338 | 280gr | Rhino Solid Shank they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate MAGPRO, ADI AR 2213, Alliant Reloder-22 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.