Load Specifications
Bullet Manufacturer:Alaska Bullet Works
Bullet Weight:275 gr
Bullet Diameter:0.338"
Bullet Length:<<locked>>
Caliber:8.5 x 55 Blaser load data
Case Length (l3):2.15"
Cartridge Length (C.O.L.):<<locked>>
Case Capacity:77 Grains of Water
Primer Size:Large Rifle (LR)
Barrel Length:23.62"
Max. allowed Pressure:62,366 psi
Recommended Twist Rate:1:15.0
Load data in caliber 8.5 x 55 Blaser with .338 | 275gr | Alaska Bullet Works Kodiak SP SPBC bullet and 104 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.
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% | 55,521 psi | 89% | 2224 fps | 100% |
| Accurate 2495 | <<locked>> | 88% | 54,027 psi | 87% | 2251 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 55,666 psi | 89% | 2306 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 53,098 psi | 85% | 2264 fps | 98% |
| Accurate 3100ᴾ | <<locked>> | 100% | 40,785 psi | 65% | 2188 fps | 97.4% |
| Accurate 4064 | <<locked>> | 90% | 53,983 psi | 87% | 2293 fps | 100% |
| Accurate 4350 | <<locked>> | 98% | 53,519 psi | 86% | 2375 fps | 100% |
| ADI AR 2206H | <<locked>> | 86% | 54,665 psi | 88% | 2323 fps | 100% |
| ADI AR 2208 | <<locked>> | 92% | 55,579 psi | 89% | 2326 fps | 100% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 48,776 psi | 78% | 2313 fps | 96.3% |
| ADI Benchmark 8208 | <<locked>> | 84% | 53,548 psi | 86% | 2277 fps | 100% |
| Alliant AR-Comp | <<locked>> | 84% | 54,404 psi | 87% | 2247 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 88% | 53,867 psi | 86% | 2428 fps | 100% |
| Alliant Power Pro Varmintᴾ | <<locked>> | 100% | 48,327 psi | 77% | 2313 fps | 96.4% |
| Alliant Power Pro Varmintᴾ | <<locked>> | 100% | 48,327 psi | 77% | 2313 fps | 96.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 55,303 psi | 89% | 2339 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 90% | 56,173 psi | 90% | 2362 fps | 100% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 54,723 psi | 88% | 2421 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 96% | 55,956 psi | 90% | 2451 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 47,616 psi | 76% | 2303 fps | 96.3% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 39,189 psi | 63% | 2218 fps | 99.7% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 43,395 psi | 70% | 2352 fps | 99.2% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 54,070 psi | 87% | 2339 fps | 100% |
| Bofors RP3 | <<locked>> | 92% | 56,057 psi | 90% | 2356 fps | 100% |
| Bofors RP7 | <<locked>> | 96% | 56,057 psi | 90% | 2336 fps | 98.6% |
| Hodgdon Benchmark | <<locked>> | 84% | 55,390 psi | 89% | 2260 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 86% | 56,362 psi | 90% | 2349 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 82% | 54,621 psi | 88% | 2388 fps | 100% |
| Hodgdon H380 | <<locked>> | 90% | 53,461 psi | 86% | 2326 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 98% | 56,217 psi | 90% | 2418 fps | 99.2% |
| Hodgdon H4350 | <<locked>> | 94% | 53,519 psi | 86% | 2339 fps | 97.8% |
| Hodgdon H4895 | <<locked>> | 86% | 55,187 psi | 88% | 2333 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 50,923 psi | 82% | 2313 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 88% | 54,404 psi | 87% | 2362 fps | 100% |
| Hodgdon Superformance | <<locked>> | 96% | 53,055 psi | 85% | 2408 fps | 98.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,723 psi | 57% | 1378 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 56,101 psi | 90% | 2329 fps | 100% |
| IMR 3031 | <<locked>> | 86% | 55,201 psi | 89% | 2306 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 54,853 psi | 88% | 2306 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 88% | 54,926 psi | 88% | 2297 fps | 98.8% |
| IMR 4350ᴾ | <<locked>> | 100% | 56,072 psi | 90% | 2359 fps | 98.7% |
| IMR 4451 Enduron | <<locked>> | 94% | 54,505 psi | 87% | 2320 fps | 98.8% |
| IMR 4831ᴾ | <<locked>> | 100% | 53,824 psi | 86% | 2365 fps | 100% |
| IMR 4895 | <<locked>> | 88% | 53,969 psi | 87% | 2343 fps | 100% |
| IMR 8208 XBR | <<locked>> | 84% | 53,548 psi | 86% | 2277 fps | 100% |
| Lovex D073.6 | <<locked>> | 86% | 54,288 psi | 87% | 2303 fps | 100% |
| Lovex S060 | <<locked>> | 86% | 54,128 psi | 87% | 2260 fps | 100% |
| Lovex S062 | <<locked>> | 90% | 54,665 psi | 88% | 2300 fps | 100% |
| Lovex S065 | <<locked>> | 96% | 53,867 psi | 86% | 2313 fps | 99.5% |
| Lovex S070 | <<locked>> | 98% | 54,491 psi | 87% | 2343 fps | 99% |
| Norma 201 | <<locked>> | 86% | 53,388 psi | 86% | 2274 fps | 100% |
| Norma 202 | <<locked>> | 86% | 53,693 psi | 86% | 2270 fps | 100% |
| Norma 203B | <<locked>> | 90% | 55,332 psi | 89% | 2352 fps | 100% |
| Norma 204 | <<locked>> | 98% | 53,113 psi | 85% | 2359 fps | 97.2% |
| Norma MRPᴾ | <<locked>> | 100% | 43,540 psi | 70% | 2316 fps | 96.9% |
| Norma URPᴾ | <<locked>> | 100% | 56,072 psi | 90% | 2408 fps | 100% |
| Ramshot Big Game | <<locked>> | 90% | 55,564 psi | 89% | 2372 fps | 100% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 54,737 psi | 88% | 2408 fps | 99.5% |
| Ramshot TAC | <<locked>> | 84% | 53,650 psi | 86% | 2303 fps | 99.6% |
| Ramshot Wild Boar | <<locked>> | 84% | 53,214 psi | 85% | 2313 fps | 100% |
| Ramshot X-Terminator | <<locked>> | 82% | 54,172 psi | 87% | 2280 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,303 psi | 58% | 1411 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 53,606 psi | 86% | 2313 fps | 99.1% |
| ReloadSwiss RS 52 | <<locked>> | 86% | 53,026 psi | 85% | 2375 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 55,767 psi | 89% | 2444 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 52,736 psi | 85% | 2392 fps | 99.9% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 56,434 psi | 90% | 2470 fps | 100% |
| Rottweil R 901 | <<locked>> | 84% | 54,534 psi | 87% | 2254 fps | 100% |
| Rottweil R 902 | <<locked>> | 88% | 53,896 psi | 86% | 2274 fps | 100% |
| Rottweil R 903 | <<locked>> | 94% | 55,941 psi | 90% | 2349 fps | 100% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 46,325 psi | 74% | 2290 fps | 96.2% |
| Rottweil R 907 | <<locked>> | 96% | 56,057 psi | 90% | 2336 fps | 98.6% |
| Shooters World Long Rifle | <<locked>> | 96% | 53,867 psi | 86% | 2313 fps | 99.5% |
| Shooters World Match Rifle | <<locked>> | 86% | 54,288 psi | 87% | 2303 fps | 100% |
| Shooters World Precision | <<locked>> | 90% | 54,665 psi | 88% | 2300 fps | 100% |
| Shooters World SW4350 | <<locked>> | 98% | 54,491 psi | 87% | 2343 fps | 99% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 53,867 psi | 86% | 2359 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 55,767 psi | 89% | 2329 fps | 99.9% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 56,405 psi | 90% | 2343 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 54,984 psi | 88% | 2218 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 54,824 psi | 88% | 2218 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 53,969 psi | 87% | 2274 fps | 98.7% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 45,919 psi | 74% | 2287 fps | 96.1% |
| Somchem S321 | <<locked>> | 82% | 54,462 psi | 87% | 2306 fps | 100% |
| Somchem S335 | <<locked>> | 86% | 54,244 psi | 87% | 2218 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 55,143 psi | 88% | 2316 fps | 100% |
| Somchem S355 | <<locked>> | 94% | 56,130 psi | 90% | 2346 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 50,372 psi | 81% | 2365 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 46,775 psi | 75% | 2274 fps | 97.2% |
| Vihtavuori N130 | <<locked>> | 82% | 54,723 psi | 88% | 2182 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 55,259 psi | 89% | 2205 fps | 100% |
| Vihtavuori N135 | <<locked>> | 88% | 53,751 psi | 86% | 2241 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 54,404 psi | 87% | 2257 fps | 100% |
| Vihtavuori N150 | <<locked>> | 94% | 54,157 psi | 87% | 2287 fps | 100% |
| Vihtavuori N160 | <<locked>> | 98% | 55,201 psi | 89% | 2362 fps | 100% |
| Vihtavuori N530 | <<locked>> | 84% | 53,867 psi | 86% | 2277 fps | 100% |
| Vihtavuori N540 | <<locked>> | 90% | 55,782 psi | 89% | 2297 fps | 100% |
| Vihtavuori N550 | <<locked>> | 98% | 54,041 psi | 87% | 2369 fps | 99.9% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 42,873 psi | 69% | 2277 fps | 99.6% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 55,056 psi | 88% | 2339 fps | 100% |
| Winchester 748 | <<locked>> | 84% | 53,925 psi | 86% | 2320 fps | 100% |
| Winchester 760 | <<locked>> | 96% | 52,910 psi | 85% | 2375 fps | 98.8% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 34,969 psi | 56% | 2231 fps | 99.8% |
| Winchester StaBALL Match | <<locked>> | 88% | 56,289 psi | 90% | 2352 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% | 49,211 psi | 79% | 2152 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 41,858 psi | 67% | 2103 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 48,791 psi | 78% | 2228 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 41,046 psi | 66% | 2087 fps | 95.4% |
| Accurate 3100 | <<locked>> | 94% | 33,388 psi | 54% | 2057 fps | 95.2% |
| Accurate 4064 | <<locked>> | 80% | 39,624 psi | 64% | 2103 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 28,950 psi | 46% | 1972 fps | 95.5% |
| ADI AR 2206H | <<locked>> | 80% | 45,281 psi | 73% | 2198 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 80% | 38,638 psi | 62% | 2080 fps | 98.8% |
| ADI AR 2209 | <<locked>> | 98% | 45,629 psi | 73% | 2264 fps | 95.5% |
| ADI Benchmark 8208 | <<locked>> | 80% | 47,340 psi | 76% | 2198 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 47,834 psi | 77% | 2175 fps | 100% |
| Alliant Power Pro 2000-MR | 49 gr | 80% | 41,089 psi | 66% | 2234 fps | 99.2% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 45,542 psi | 73% | 2267 fps | 95.7% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 45,542 psi | 73% | 2267 fps | 95.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 38,334 psi | 61% | 2100 fps | 99.6% |
| Alliant Reloder-15 | <<locked>> | 80% | 40,973 psi | 66% | 2149 fps | 99.3% |
| Alliant Reloder-16 | <<locked>> | 80% | 29,747 psi | 48% | 1982 fps | 95.6% |
| Alliant Reloder-17 | 48.3 gr | 80% | 32,982 psi | 53% | 2087 fps | 98.6% |
| Alliant Reloder-19 | <<locked>> | 98% | 44,904 psi | 72% | 2260 fps | 95.6% |
| Alliant Reloder-23 | <<locked>> | 86% | 25,759 psi | 41% | 1916 fps | 95.3% |
| Alliant Reloder-26 | <<locked>> | 90% | 30,850 psi | 49% | 2096 fps | 95.2% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 44,338 psi | 71% | 2205 fps | 99.4% |
| Bofors RP3 | <<locked>> | 80% | 37,811 psi | 61% | 2103 fps | 99.7% |
| Bofors RP7 | <<locked>> | 84% | 38,783 psi | 62% | 2080 fps | 95% |
| Hodgdon Benchmark | <<locked>> | 80% | 49,052 psi | 79% | 2182 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 46,108 psi | 74% | 2221 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 80% | 51,126 psi | 82% | 2346 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 38,638 psi | 62% | 2106 fps | 97.9% |
| Hodgdon H414 | <<locked>> | 86% | 38,000 psi | 61% | 2146 fps | 95.6% |
| Hodgdon H4350 | <<locked>> | 86% | 41,742 psi | 67% | 2165 fps | 95.1% |
| Hodgdon H4895 | <<locked>> | 80% | 45,672 psi | 73% | 2205 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 27,253 psi | 44% | 1903 fps | 96.5% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 41,771 psi | 67% | 2192 fps | 99.9% |
| Hodgdon Superformance | 56.1 gr | 88% | 40,161 psi | 64% | 2205 fps | 95.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,585 psi | 43% | 1227 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 43,947 psi | 70% | 2169 fps | 99.9% |
| IMR 3031 | <<locked>> | 80% | 45,643 psi | 73% | 2192 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 40,582 psi | 65% | 2106 fps | 99.2% |
| IMR 4166 Enduron | <<locked>> | 80% | 42,989 psi | 69% | 2123 fps | 96.8% |
| IMR 4350 | <<locked>> | 88% | 38,740 psi | 62% | 2103 fps | 95% |
| IMR 4451 Enduron | <<locked>> | 82% | 37,985 psi | 61% | 2067 fps | 95.3% |
| IMR 4831 | <<locked>> | 80% | 28,311 psi | 45% | 1939 fps | 95.2% |
| IMR 4895 | <<locked>> | 80% | 41,959 psi | 67% | 2172 fps | 99.7% |
| IMR 8208 XBR | <<locked>> | 80% | 47,340 psi | 76% | 2198 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 44,469 psi | 71% | 2178 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 45,368 psi | 73% | 2142 fps | 99.9% |
| Lovex S062 | <<locked>> | 80% | 40,538 psi | 65% | 2110 fps | 99.9% |
| Lovex S065 | <<locked>> | 80% | 33,228 psi | 53% | 1982 fps | 95.4% |
| Lovex S070 | <<locked>> | 84% | 35,607 psi | 57% | 2047 fps | 95% |
| Norma 201 | <<locked>> | 80% | 44,367 psi | 71% | 2156 fps | 100% |
| Norma 202 | <<locked>> | 80% | 44,802 psi | 72% | 2159 fps | 100% |
| Norma 203B | <<locked>> | 80% | 40,335 psi | 65% | 2139 fps | 99.5% |
| Norma 204 | <<locked>> | 94% | 46,514 psi | 75% | 2264 fps | 95.7% |
| Norma MRP | <<locked>> | 96% | 38,189 psi | 61% | 2218 fps | 95.2% |
| Norma URP | <<locked>> | 80% | 29,573 psi | 47% | 1975 fps | 95.5% |
| Ramshot Big Game | <<locked>> | 80% | 39,813 psi | 64% | 2152 fps | 99.3% |
| Ramshot Hunter | <<locked>> | 86% | 35,027 psi | 56% | 2096 fps | 95.5% |
| Ramshot TAC | <<locked>> | 80% | 47,108 psi | 76% | 2211 fps | 98.9% |
| Ramshot Wild Boar | <<locked>> | 80% | 46,804 psi | 75% | 2228 fps | 99.9% |
| Ramshot X-Terminator | <<locked>> | 80% | 50,894 psi | 82% | 2238 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,963 psi | 43% | 1257 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 39,117 psi | 63% | 2096 fps | 96.5% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 43,163 psi | 69% | 2238 fps | 99.6% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 35,128 psi | 56% | 2136 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 30,763 psi | 49% | 2031 fps | 95.7% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 33,141 psi | 53% | 2083 fps | 95.7% |
| Rottweil R 901 | <<locked>> | 80% | 48,428 psi | 78% | 2178 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 42,409 psi | 68% | 2119 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 35,636 psi | 57% | 2057 fps | 99.2% |
| Rottweil R 905 | <<locked>> | 98% | 43,279 psi | 69% | 2241 fps | 95.4% |
| Rottweil R 907 | <<locked>> | 84% | 38,783 psi | 62% | 2080 fps | 95% |
| Shooters World Long Rifle | <<locked>> | 80% | 33,228 psi | 53% | 1982 fps | 95.4% |
| Shooters World Match Rifle | <<locked>> | 80% | 44,469 psi | 71% | 2178 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 40,538 psi | 65% | 2110 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 84% | 35,607 psi | 57% | 2047 fps | 95% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 36,492 psi | 59% | 2100 fps | 98.8% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 45,571 psi | 73% | 2195 fps | 99% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 43,714 psi | 70% | 2175 fps | 99.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 45,730 psi | 73% | 2106 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 38,087 psi | 61% | 2005 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 36,724 psi | 59% | 2021 fps | 95.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 42,902 psi | 69% | 2238 fps | 95.3% |
| Somchem S321 | <<locked>> | 80% | 51,068 psi | 82% | 2264 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 45,310 psi | 73% | 2110 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 45,194 psi | 72% | 2188 fps | 99.8% |
| Somchem S355 | <<locked>> | 80% | 36,463 psi | 58% | 2060 fps | 99.2% |
| Somchem S365 | <<locked>> | 80% | 26,571 psi | 43% | 1939 fps | 97.8% |
| Somchem S385 | <<locked>> | 94% | 38,508 psi | 62% | 2139 fps | 95% |
| Vihtavuori N130 | <<locked>> | 80% | 51,590 psi | 83% | 2146 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 46,064 psi | 74% | 2096 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 41,858 psi | 67% | 2093 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 42,308 psi | 68% | 2106 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 34,679 psi | 56% | 2011 fps | 99.6% |
| Vihtavuori N160 | <<locked>> | 80% | 30,879 psi | 50% | 1975 fps | 95.9% |
| Vihtavuori N530 | <<locked>> | 80% | 47,442 psi | 76% | 2195 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 40,698 psi | 65% | 2103 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 30,284 psi | 49% | 1978 fps | 95.5% |
| Vihtavuori N555 | <<locked>> | 86% | 27,398 psi | 44% | 1975 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 30,603 psi | 49% | 1955 fps | 97.9% |
| Winchester 748 | <<locked>> | 80% | 47,239 psi | 76% | 2238 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 38,203 psi | 61% | 2149 fps | 95.7% |
| Winchester StaBALL HD | <<locked>> | 90% | 25,512 psi | 41% | 1972 fps | 95.5% |
| Winchester StaBALL Match | <<locked>> | 80% | 43,134 psi | 69% | 2178 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 104 powders for 8.5 x 55 Blaser loaded with the .338 | 275gr | Alaska Bullet Works Kodiak SP SPBC. ReloadSwiss RS 70 delivers the highest muzzle velocity at 2,470 fps; across all powders the maximum-charge window runs from 1,378 fps to 2,470 fps. Accurate 3100 gives the best case fill at 100 %, and 104 of the 104 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (430 MPa), the top charges use 56–90 %, 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, Alliant Power Pro Varmint 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 | 275gr | Alaska Bullet Works Kodiak SP SPBC 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.