Load Specifications
Bullet:.338 | 250gr | Lapua Scenar
Bullet Manufacturer:Lapua
Bullet Weight:250 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:1:12.5
Load data in caliber 8.5 x 55 Blaser with .338 | 250gr | Lapua Scenar bullet and 106 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 Power Pro 2000-MR and ReloadSwiss RS 52.
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>> | 86% | 53,534 psi | 86% | 2313 fps | 100% |
| Accurate 2460 | <<locked>> | 84% | 55,201 psi | 89% | 2379 fps | 100% |
| Accurate 2495 | <<locked>> | 92% | 54,520 psi | 87% | 2372 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 53,330 psi | 86% | 2392 fps | 100% |
| Accurate 2700 | <<locked>> | 92% | 54,752 psi | 88% | 2372 fps | 96.9% |
| Accurate 4064 | <<locked>> | 94% | 54,288 psi | 87% | 2411 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 49,777 psi | 80% | 2434 fps | 99.2% |
| Accurate LT-30 | <<locked>> | 82% | 56,202 psi | 90% | 2300 fps | 100% |
| ADI AR 2206H | <<locked>> | 90% | 55,709 psi | 89% | 2441 fps | 100% |
| ADI AR 2208 | <<locked>> | 94% | 53,214 psi | 85% | 2398 fps | 99.7% |
| ADI Benchmark 8208 | <<locked>> | 88% | 54,955 psi | 88% | 2402 fps | 100% |
| Alliant AR-Comp | <<locked>> | 88% | 55,245 psi | 89% | 2375 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 53,490 psi | 86% | 2448 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 92% | 55,042 psi | 88% | 2546 fps | 99.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 96% | 56,072 psi | 90% | 2457 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 82% | 53,490 psi | 86% | 2316 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 92% | 53,693 psi | 86% | 2438 fps | 99.8% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 49,008 psi | 79% | 2441 fps | 99.4% |
| Alliant Reloder-17 | <<locked>> | 98% | 53,055 psi | 85% | 2520 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 34,650 psi | 56% | 2211 fps | 97.6% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 38,014 psi | 61% | 2333 fps | 96.3% |
| Baschieri & Pellagri 106 | <<locked>> | 82% | 55,332 psi | 89% | 2303 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 90% | 55,521 psi | 89% | 2461 fps | 99.7% |
| Bofors RP3 | <<locked>> | 94% | 53,287 psi | 85% | 2431 fps | 100% |
| Bofors RP7 | <<locked>> | 98% | 53,751 psi | 86% | 2402 fps | 97.1% |
| Hodgdon Benchmark | <<locked>> | 86% | 53,824 psi | 86% | 2346 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 88% | 53,809 psi | 86% | 2428 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 86% | 56,028 psi | 90% | 2516 fps | 99.9% |
| Hodgdon H322 | <<locked>> | 84% | 55,695 psi | 89% | 2392 fps | 100% |
| Hodgdon H335 | <<locked>> | 82% | 53,156 psi | 85% | 2375 fps | 100% |
| Hodgdon H380 | <<locked>> | 94% | 54,360 psi | 87% | 2441 fps | 99.3% |
| Hodgdon H414ᴾ | <<locked>> | 100% | 53,243 psi | 85% | 2480 fps | 97.7% |
| Hodgdon H4350 | <<locked>> | 98% | 54,520 psi | 87% | 2448 fps | 96.5% |
| Hodgdon H4895 | <<locked>> | 90% | 56,202 psi | 90% | 2451 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 45,034 psi | 72% | 2336 fps | 99.6% |
| Hodgdon LEVERevolution | <<locked>> | 92% | 55,274 psi | 89% | 2484 fps | 100% |
| Hodgdon Superformanceᴾ | <<locked>> | 100% | 54,317 psi | 87% | 2513 fps | 97.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,244 psi | 57% | 1430 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 54,317 psi | 87% | 2411 fps | 100% |
| IMR 3031 | <<locked>> | 90% | 56,144 psi | 90% | 2434 fps | 100% |
| IMR 4064 | <<locked>> | 94% | 56,115 psi | 90% | 2425 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 90% | 53,243 psi | 85% | 2365 fps | 97.5% |
| IMR 4198 | <<locked>> | 82% | 53,635 psi | 86% | 2277 fps | 100% |
| IMR 4350ᴾ | <<locked>> | 100% | 50,198 psi | 80% | 2375 fps | 96.4% |
| IMR 4451 Enduron | <<locked>> | 98% | 55,927 psi | 90% | 2431 fps | 97.9% |
| IMR 4831ᴾ | <<locked>> | 100% | 47,543 psi | 76% | 2385 fps | 99% |
| IMR 4895 | <<locked>> | 92% | 55,013 psi | 88% | 2464 fps | 100% |
| IMR 8208 XBR | <<locked>> | 88% | 54,955 psi | 88% | 2402 fps | 100% |
| Lovex D073.5 | <<locked>> | 84% | 55,187 psi | 88% | 2388 fps | 100% |
| Lovex D073.6 | <<locked>> | 90% | 55,259 psi | 89% | 2425 fps | 100% |
| Lovex S060 | <<locked>> | 90% | 55,840 psi | 90% | 2382 fps | 100% |
| Lovex S062 | <<locked>> | 94% | 55,927 psi | 90% | 2425 fps | 100% |
| Lovex S065ᴾ | <<locked>> | 100% | 54,621 psi | 88% | 2421 fps | 98.8% |
| Lovex S070ᴾ | <<locked>> | 100% | 51,953 psi | 83% | 2405 fps | 97.6% |
| Norma 201 | <<locked>> | 90% | 54,723 psi | 88% | 2398 fps | 100% |
| Norma 202 | <<locked>> | 90% | 54,926 psi | 88% | 2395 fps | 100% |
| Norma 203B | <<locked>> | 94% | 56,217 psi | 90% | 2470 fps | 100% |
| Norma URPᴾ | <<locked>> | 100% | 49,356 psi | 79% | 2425 fps | 99.1% |
| Ramshot Big Game | <<locked>> | 92% | 52,895 psi | 85% | 2448 fps | 99.9% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 48,660 psi | 78% | 2425 fps | 97.7% |
| Ramshot TAC | <<locked>> | 88% | 55,477 psi | 89% | 2425 fps | 99% |
| Ramshot Wild Boar | <<locked>> | 88% | 54,650 psi | 88% | 2438 fps | 100% |
| Ramshot X-Terminator | <<locked>> | 86% | 56,347 psi | 90% | 2408 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,491 psi | 57% | 1463 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 54,665 psi | 88% | 2385 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 94% | 54,984 psi | 88% | 2428 fps | 98.3% |
| ReloadSwiss RS 52 | <<locked>> | 90% | 53,664 psi | 86% | 2493 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 96% | 52,866 psi | 85% | 2520 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 49,356 psi | 79% | 2454 fps | 99% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 50,154 psi | 80% | 2477 fps | 98.8% |
| Rottweil R 901 | <<locked>> | 88% | 55,840 psi | 90% | 2379 fps | 100% |
| Rottweil R 902 | <<locked>> | 92% | 54,926 psi | 88% | 2392 fps | 100% |
| Rottweil R 903 | <<locked>> | 98% | 56,333 psi | 90% | 2461 fps | 100% |
| Rottweil R 907 | <<locked>> | 98% | 53,751 psi | 86% | 2402 fps | 97.1% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 54,621 psi | 88% | 2421 fps | 98.8% |
| Shooters World Match Rifle | <<locked>> | 90% | 55,259 psi | 89% | 2425 fps | 100% |
| Shooters World Precision | <<locked>> | 94% | 55,927 psi | 90% | 2425 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 51,953 psi | 83% | 2405 fps | 97.6% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 54,476 psi | 87% | 2362 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 96% | 54,781 psi | 88% | 2477 fps | 100% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 54,389 psi | 87% | 2333 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 88% | 53,476 psi | 86% | 2398 fps | 99.1% |
| SNPE Vectan SP 9 | <<locked>> | 90% | 54,172 psi | 87% | 2421 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 53,374 psi | 86% | 2303 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 96% | 56,275 psi | 90% | 2339 fps | 100% |
| SNPE Vectan Tubal 7000ᴾ | <<locked>> | 100% | 55,448 psi | 89% | 2385 fps | 97.8% |
| Somchem S321 | <<locked>> | 86% | 56,347 psi | 90% | 2434 fps | 100% |
| Somchem S335 | <<locked>> | 90% | 55,767 psi | 89% | 2343 fps | 100% |
| Somchem S341 | <<locked>> | 88% | 53,113 psi | 85% | 2395 fps | 99.9% |
| Somchem S355 | <<locked>> | 96% | 53,359 psi | 86% | 2418 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 44,034 psi | 71% | 2385 fps | 100% |
| Vihtavuori N130 | <<locked>> | 86% | 56,434 psi | 90% | 2306 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 53,534 psi | 86% | 2293 fps | 100% |
| Vihtavuori N135 | <<locked>> | 92% | 54,433 psi | 87% | 2362 fps | 100% |
| Vihtavuori N140 | <<locked>> | 92% | 55,448 psi | 89% | 2375 fps | 100% |
| Vihtavuori N150 | <<locked>> | 98% | 54,882 psi | 88% | 2402 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 51,967 psi | 83% | 2421 fps | 99.3% |
| Vihtavuori N530 | <<locked>> | 88% | 55,709 psi | 89% | 2405 fps | 100% |
| Vihtavuori N540 | <<locked>> | 92% | 53,563 psi | 86% | 2379 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 51,126 psi | 82% | 2431 fps | 99.1% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 36,927 psi | 59% | 2274 fps | 97.6% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 52,866 psi | 85% | 2411 fps | 100% |
| Winchester 748 | <<locked>> | 88% | 54,911 psi | 88% | 2441 fps | 100% |
| Winchester 760ᴾ | <<locked>> | 100% | 53,476 psi | 86% | 2484 fps | 97.8% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 30,966 psi | 50% | 2195 fps | 96.7% |
| Winchester StaBALL Match | <<locked>> | 90% | 53,867 psi | 86% | 2428 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% | 44,614 psi | 72% | 2198 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 48,501 psi | 78% | 2297 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 37,188 psi | 60% | 2136 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 43,642 psi | 70% | 2264 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 48,240 psi | 77% | 2283 fps | 95.6% |
| Accurate 4064 | <<locked>> | 80% | 35,172 psi | 56% | 2133 fps | 99.9% |
| Accurate 4350 | <<locked>> | 88% | 33,025 psi | 53% | 2152 fps | 95.6% |
| Accurate LT-30 | <<locked>> | 80% | 52,823 psi | 85% | 2260 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 41,046 psi | 66% | 2224 fps | 98.8% |
| ADI AR 2208 | <<locked>> | 80% | 34,809 psi | 56% | 2096 fps | 96.6% |
| ADI Benchmark 8208 | <<locked>> | 80% | 43,076 psi | 69% | 2234 fps | 99.7% |
| Alliant AR-Comp | <<locked>> | 80% | 42,612 psi | 68% | 2221 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 50,183 psi | 80% | 2405 fps | 100% |
| Alliant Power Pro 2000-MR | 47.7 gr | 80% | 36,956 psi | 59% | 2244 fps | 97% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 34,127 psi | 55% | 2116 fps | 98.1% |
| Alliant Reloder-10x | <<locked>> | 80% | 50,227 psi | 81% | 2277 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 36,898 psi | 59% | 2172 fps | 97.5% |
| Alliant Reloder-16 | <<locked>> | 88% | 34,055 psi | 55% | 2162 fps | 95.7% |
| Alliant Reloder-17 | <<locked>> | 80% | 29,356 psi | 47% | 2080 fps | 95.6% |
| Alliant Reloder-23 | <<locked>> | 94% | 28,993 psi | 46% | 2077 fps | 95.1% |
| Alliant Reloder-26 | <<locked>> | 98% | 35,505 psi | 57% | 2280 fps | 95.3% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 51,938 psi | 83% | 2264 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 39,914 psi | 64% | 2228 fps | 97.6% |
| Bofors RP3 | <<locked>> | 80% | 33,460 psi | 54% | 2116 fps | 98% |
| Bofors RP7 | <<locked>> | 92% | 44,715 psi | 72% | 2267 fps | 95.1% |
| Hodgdon Benchmark | <<locked>> | 80% | 45,005 psi | 72% | 2224 fps | 99.9% |
| Hodgdon BL-C2 | <<locked>> | 80% | 41,336 psi | 66% | 2251 fps | 99.8% |
| Hodgdon CFE223 | <<locked>> | 80% | 45,339 psi | 73% | 2369 fps | 99.1% |
| Hodgdon H322 | <<locked>> | 80% | 49,066 psi | 79% | 2310 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 49,734 psi | 80% | 2333 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 34,519 psi | 55% | 2119 fps | 95.3% |
| Hodgdon H414 | <<locked>> | 94% | 43,932 psi | 70% | 2339 fps | 95.7% |
| Hodgdon H4350 | <<locked>> | 94% | 48,240 psi | 77% | 2359 fps | 95.2% |
| Hodgdon H4895 | <<locked>> | 80% | 41,408 psi | 66% | 2238 fps | 99.2% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 29,240 psi | 47% | 2031 fps | 95.7% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 36,999 psi | 59% | 2205 fps | 98.8% |
| Hodgdon Superformance | <<locked>> | 96% | 47,123 psi | 76% | 2405 fps | 95.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,179 psi | 42% | 1273 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 39,682 psi | 64% | 2195 fps | 98.9% |
| IMR 3031 | <<locked>> | 80% | 40,466 psi | 65% | 2228 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 36,521 psi | 59% | 2123 fps | 97.4% |
| IMR 4166 Enduron | <<locked>> | 84% | 44,469 psi | 71% | 2234 fps | 95.6% |
| IMR 4198 | <<locked>> | 80% | 50,604 psi | 81% | 2241 fps | 100% |
| IMR 4350 | <<locked>> | 96% | 44,469 psi | 71% | 2287 fps | 95% |
| IMR 4451 Enduron | <<locked>> | 90% | 43,758 psi | 70% | 2254 fps | 95.4% |
| IMR 4831 | <<locked>> | 88% | 32,271 psi | 52% | 2116 fps | 95.3% |
| IMR 4895 | <<locked>> | 80% | 37,724 psi | 60% | 2195 fps | 98.2% |
| IMR 8208 XBR | <<locked>> | 80% | 43,076 psi | 69% | 2234 fps | 99.7% |
| Lovex D073.5 | <<locked>> | 80% | 48,240 psi | 77% | 2303 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 39,552 psi | 63% | 2208 fps | 99.9% |
| Lovex S060 | <<locked>> | 80% | 41,365 psi | 66% | 2172 fps | 98.8% |
| Lovex S062 | <<locked>> | 80% | 36,303 psi | 58% | 2129 fps | 98.9% |
| Lovex S065 | <<locked>> | 88% | 38,159 psi | 61% | 2165 fps | 95.5% |
| Lovex S070 | <<locked>> | 92% | 40,669 psi | 65% | 2231 fps | 95% |
| Norma 201 | <<locked>> | 80% | 40,234 psi | 65% | 2185 fps | 99.4% |
| Norma 202 | <<locked>> | 80% | 40,263 psi | 65% | 2195 fps | 100% |
| Norma 203B | <<locked>> | 80% | 36,289 psi | 58% | 2162 fps | 97.8% |
| Norma URP | <<locked>> | 88% | 33,866 psi | 54% | 2156 fps | 95.6% |
| Ramshot Big Game | <<locked>> | 80% | 35,578 psi | 57% | 2169 fps | 97.4% |
| Ramshot Hunter | <<locked>> | 94% | 40,147 psi | 64% | 2280 fps | 95.5% |
| Ramshot TAC | <<locked>> | 80% | 42,888 psi | 69% | 2238 fps | 97% |
| Ramshot Wild Boar | <<locked>> | 80% | 42,003 psi | 67% | 2254 fps | 98.9% |
| Ramshot X-Terminator | <<locked>> | 80% | 46,456 psi | 74% | 2274 fps | 99.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,484 psi | 42% | 1306 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 48,095 psi | 77% | 2300 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 39,972 psi | 64% | 2198 fps | 95.2% |
| ReloadSwiss RS 52 | 46.2 gr | 80% | 38,072 psi | 61% | 2251 fps | 97.8% |
| ReloadSwiss RS 60 | 46.9 gr | 80% | 31,285 psi | 50% | 2139 fps | 98.8% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 33,098 psi | 53% | 2169 fps | 95% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 38,392 psi | 62% | 2270 fps | 95.8% |
| Rottweil R 901 | <<locked>> | 80% | 44,048 psi | 71% | 2221 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 38,159 psi | 61% | 2142 fps | 99.1% |
| Rottweil R 903 | <<locked>> | 80% | 31,676 psi | 51% | 2073 fps | 97.2% |
| Rottweil R 907 | <<locked>> | 92% | 44,715 psi | 72% | 2267 fps | 95.1% |
| Shooters World Long Rifle | <<locked>> | 88% | 38,159 psi | 61% | 2165 fps | 95.5% |
| Shooters World Match Rifle | <<locked>> | 80% | 39,552 psi | 63% | 2208 fps | 99.9% |
| Shooters World Precision | <<locked>> | 80% | 36,303 psi | 58% | 2129 fps | 98.9% |
| Shooters World SW4350 | <<locked>> | 92% | 40,669 psi | 65% | 2231 fps | 95% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 50,894 psi | 82% | 2316 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 32,561 psi | 52% | 2113 fps | 96.5% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 51,039 psi | 82% | 2293 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 40,828 psi | 65% | 2211 fps | 97.1% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 39,407 psi | 63% | 2198 fps | 98.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 41,698 psi | 67% | 2146 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 34,432 psi | 55% | 2037 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 42,569 psi | 68% | 2205 fps | 95.2% |
| Somchem S321 | <<locked>> | 80% | 46,253 psi | 74% | 2303 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 41,278 psi | 66% | 2152 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 40,654 psi | 65% | 2211 fps | 98.6% |
| Somchem S355 | <<locked>> | 80% | 32,663 psi | 52% | 2080 fps | 97.3% |
| Somchem S365 | <<locked>> | 82% | 25,077 psi | 40% | 1975 fps | 95.2% |
| Vihtavuori N130 | <<locked>> | 80% | 47,181 psi | 76% | 2198 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 41,916 psi | 67% | 2142 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 37,347 psi | 60% | 2133 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 38,203 psi | 61% | 2142 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 30,995 psi | 50% | 2028 fps | 98% |
| Vihtavuori N160 | <<locked>> | 86% | 33,286 psi | 53% | 2113 fps | 95.2% |
| Vihtavuori N530 | <<locked>> | 80% | 42,830 psi | 69% | 2228 fps | 99.7% |
| Vihtavuori N540 | <<locked>> | 80% | 36,564 psi | 59% | 2133 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 88% | 34,722 psi | 56% | 2162 fps | 95.6% |
| Vihtavuori N555 | <<locked>> | 94% | 30,792 psi | 49% | 2142 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 29,501 psi | 47% | 2008 fps | 95.8% |
| Winchester 748 | <<locked>> | 80% | 42,047 psi | 67% | 2264 fps | 99.9% |
| Winchester 760 | <<locked>> | 92% | 41,278 psi | 66% | 2293 fps | 95% |
| Winchester StaBALL HD | <<locked>> | 98% | 29,022 psi | 47% | 2139 fps | 95.4% |
| Winchester StaBALL Match | <<locked>> | 80% | 38,682 psi | 62% | 2201 fps | 98.8% |
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 106 powders for 8.5 x 55 Blaser loaded with the .338 | 250gr | Lapua Scenar. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,546 fps; across all powders the maximum-charge window runs from 1,430 fps to 2,546 fps. Accurate 4350 gives the best case fill at 100 %, and 106 of the 106 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (430 MPa), the top charges use 50–90 %, leaving at least 10 % headroom. The 250.0 gr projectile in 0.338" calls for a 1:12.5 twist; slower twists will usually not stabilise this weight. Accurate 4350, Alliant Reloder-16, Alliant Reloder-23 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 Power Pro 2000-MR, ReloadSwiss RS 52 rank at the top here: for 8.5 x 55 Blaser with the .338 | 250gr | Lapua Scenar 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.