Load Specifications
Load data in caliber 8.5 x 55 Blaser with .338 | 250gr | Nosler Partition Gold 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, 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.
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% | 56,057 psi | 90% | 2356 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 54,157 psi | 87% | 2382 fps | 100% |
| Accurate 2495 | <<locked>> | 90% | 54,172 psi | 87% | 2382 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 56,086 psi | 90% | 2441 fps | 100% |
| Accurate 2700 | <<locked>> | 90% | 53,621 psi | 86% | 2382 fps | 97.1% |
| Accurate 4064 | <<locked>> | 92% | 53,896 psi | 86% | 2421 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 53,142 psi | 85% | 2497 fps | 99.7% |
| ADI AR 2206H | <<locked>> | 88% | 54,723 psi | 88% | 2451 fps | 100% |
| ADI AR 2208 | <<locked>> | 94% | 55,608 psi | 89% | 2448 fps | 99.9% |
| ADI Benchmark 8208 | <<locked>> | 86% | 54,128 psi | 87% | 2408 fps | 100% |
| Alliant AR-Comp | <<locked>> | 86% | 54,520 psi | 87% | 2382 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 55,840 psi | 90% | 2497 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 90% | 54,302 psi | 87% | 2559 fps | 99.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 55,579 psi | 89% | 2470 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 82% | 55,637 psi | 89% | 2356 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 92% | 56,202 psi | 90% | 2490 fps | 100% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 51,314 psi | 82% | 2497 fps | 99.7% |
| Alliant Reloder-17 | <<locked>> | 98% | 55,927 psi | 90% | 2579 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 36,579 psi | 59% | 2274 fps | 98.6% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 40,422 psi | 65% | 2405 fps | 97.6% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 54,563 psi | 87% | 2467 fps | 99.8% |
| Bofors RP3 | <<locked>> | 94% | 56,159 psi | 90% | 2487 fps | 100% |
| Bofors RP7 | <<locked>> | 98% | 56,202 psi | 90% | 2454 fps | 97.8% |
| Hodgdon Benchmark | <<locked>> | 86% | 55,927 psi | 90% | 2392 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 86% | 53,113 psi | 85% | 2438 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 84% | 54,810 psi | 88% | 2520 fps | 100% |
| Hodgdon H322 | <<locked>> | 82% | 54,795 psi | 88% | 2398 fps | 100% |
| Hodgdon H335 | <<locked>> | 82% | 55,579 psi | 89% | 2425 fps | 100% |
| Hodgdon H380 | <<locked>> | 92% | 53,766 psi | 86% | 2451 fps | 99.5% |
| Hodgdon H414ᴾ | <<locked>> | 100% | 56,202 psi | 90% | 2543 fps | 98.5% |
| Hodgdon H4350 | <<locked>> | 96% | 53,693 psi | 86% | 2461 fps | 96.8% |
| Hodgdon H4895 | <<locked>> | 88% | 55,303 psi | 89% | 2457 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 47,718 psi | 77% | 2392 fps | 99.9% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 54,476 psi | 87% | 2490 fps | 100% |
| Hodgdon Superformance | <<locked>> | 98% | 53,505 psi | 86% | 2526 fps | 97.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,404 psi | 57% | 1450 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 53,316 psi | 85% | 2418 fps | 100% |
| IMR 3031 | <<locked>> | 88% | 55,187 psi | 88% | 2441 fps | 100% |
| IMR 4064 | <<locked>> | 92% | 55,274 psi | 89% | 2434 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 90% | 55,448 psi | 89% | 2418 fps | 98.2% |
| IMR 4198 | <<locked>> | 82% | 55,593 psi | 89% | 2316 fps | 100% |
| IMR 4350ᴾ | <<locked>> | 100% | 52,953 psi | 85% | 2434 fps | 97.3% |
| IMR 4451 Enduron | <<locked>> | 96% | 55,027 psi | 88% | 2441 fps | 98.1% |
| IMR 4831ᴾ | <<locked>> | 100% | 50,270 psi | 81% | 2441 fps | 99.5% |
| IMR 4895 | <<locked>> | 90% | 54,099 psi | 87% | 2470 fps | 100% |
| IMR 8208 XBR | <<locked>> | 86% | 54,128 psi | 87% | 2408 fps | 100% |
| Lovex D073.5 | <<locked>> | 82% | 54,012 psi | 87% | 2395 fps | 100% |
| Lovex D073.6 | <<locked>> | 88% | 54,273 psi | 87% | 2428 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 54,607 psi | 88% | 2385 fps | 100% |
| Lovex S062 | <<locked>> | 92% | 54,940 psi | 88% | 2431 fps | 100% |
| Lovex S065 | <<locked>> | 98% | 54,085 psi | 87% | 2434 fps | 99% |
| Lovex S070ᴾ | <<locked>> | 100% | 54,592 psi | 88% | 2464 fps | 98.3% |
| Norma 201 | <<locked>> | 88% | 53,621 psi | 86% | 2402 fps | 100% |
| Norma 202 | <<locked>> | 88% | 54,128 psi | 87% | 2405 fps | 100% |
| Norma 203B | <<locked>> | 92% | 55,361 psi | 89% | 2477 fps | 100% |
| Norma 204ᴾ | <<locked>> | 100% | 53,388 psi | 86% | 2477 fps | 96.1% |
| Norma URPᴾ | <<locked>> | 100% | 52,170 psi | 84% | 2484 fps | 99.6% |
| Ramshot Big Game | <<locked>> | 92% | 55,811 psi | 89% | 2503 fps | 100% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 51,227 psi | 82% | 2480 fps | 98.4% |
| Ramshot TAC | <<locked>> | 86% | 54,172 psi | 87% | 2428 fps | 99.1% |
| Ramshot Wild Boar | <<locked>> | 86% | 53,592 psi | 86% | 2444 fps | 100% |
| Ramshot X-Terminator | <<locked>> | 84% | 54,897 psi | 88% | 2411 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,911 psi | 58% | 1486 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 53,664 psi | 86% | 2392 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 54,143 psi | 87% | 2438 fps | 98.5% |
| ReloadSwiss RS 52 | <<locked>> | 88% | 52,881 psi | 85% | 2500 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 96% | 55,883 psi | 90% | 2579 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 52,605 psi | 84% | 2516 fps | 99.6% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 52,794 psi | 85% | 2539 fps | 99.4% |
| Rottweil R 901 | <<locked>> | 86% | 54,679 psi | 88% | 2382 fps | 100% |
| Rottweil R 902 | <<locked>> | 90% | 54,027 psi | 87% | 2398 fps | 100% |
| Rottweil R 903 | <<locked>> | 96% | 55,709 psi | 89% | 2474 fps | 100% |
| Rottweil R 907 | <<locked>> | 98% | 56,202 psi | 90% | 2454 fps | 97.8% |
| Shooters World Long Rifle | <<locked>> | 98% | 54,085 psi | 87% | 2434 fps | 99% |
| Shooters World Match Rifle | <<locked>> | 88% | 54,273 psi | 87% | 2428 fps | 100% |
| Shooters World Precision | <<locked>> | 92% | 54,940 psi | 88% | 2431 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 54,592 psi | 88% | 2464 fps | 98.3% |
| SNPE Vectan SP 11 | <<locked>> | 94% | 54,114 psi | 87% | 2487 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 88% | 56,144 psi | 90% | 2454 fps | 99.6% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 53,127 psi | 85% | 2428 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 55,317 psi | 89% | 2346 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 55,390 psi | 89% | 2346 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 54,302 psi | 87% | 2392 fps | 98% |
| Somchem S321 | <<locked>> | 84% | 54,969 psi | 88% | 2438 fps | 100% |
| Somchem S335 | <<locked>> | 88% | 54,592 psi | 88% | 2346 fps | 100% |
| Somchem S341 | <<locked>> | 88% | 55,724 psi | 89% | 2448 fps | 100% |
| Somchem S355 | <<locked>> | 96% | 56,130 psi | 90% | 2470 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 46,876 psi | 75% | 2444 fps | 100% |
| Vihtavuori N130 | <<locked>> | 84% | 55,245 psi | 89% | 2313 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 55,463 psi | 89% | 2333 fps | 100% |
| Vihtavuori N135 | <<locked>> | 90% | 53,519 psi | 86% | 2365 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 54,433 psi | 87% | 2382 fps | 100% |
| Vihtavuori N150 | <<locked>> | 96% | 54,143 psi | 87% | 2411 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 55,027 psi | 88% | 2480 fps | 99.7% |
| Vihtavuori N530 | <<locked>> | 86% | 54,447 psi | 87% | 2408 fps | 100% |
| Vihtavuori N540 | <<locked>> | 92% | 56,144 psi | 90% | 2428 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 53,766 psi | 86% | 2487 fps | 99.6% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 39,421 psi | 63% | 2336 fps | 98.5% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 55,405 psi | 89% | 2464 fps | 100% |
| Winchester 748 | <<locked>> | 86% | 54,027 psi | 87% | 2448 fps | 100% |
| Winchester 760 | <<locked>> | 98% | 52,924 psi | 85% | 2497 fps | 98% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 32,634 psi | 52% | 2267 fps | 98.1% |
| Winchester StaBALL Match | <<locked>> | 88% | 52,765 psi | 85% | 2434 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% | 46,601 psi | 75% | 2241 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 50,778 psi | 81% | 2343 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 39,131 psi | 63% | 2182 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 45,876 psi | 74% | 2310 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 44,135 psi | 71% | 2241 fps | 95% |
| Accurate 4064 | <<locked>> | 80% | 37,014 psi | 59% | 2175 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 30,719 psi | 49% | 2116 fps | 95% |
| ADI AR 2206H | <<locked>> | 80% | 42,728 psi | 69% | 2274 fps | 99.2% |
| ADI AR 2208 | <<locked>> | 80% | 36,521 psi | 59% | 2149 fps | 97.4% |
| ADI Benchmark 8208 | <<locked>> | 80% | 44,744 psi | 72% | 2277 fps | 99.9% |
| Alliant AR-Comp | <<locked>> | 80% | 44,846 psi | 72% | 2264 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 52,272 psi | 84% | 2451 fps | 100% |
| Alliant Power Pro 2000-MR | 50 gr | 80% | 38,667 psi | 62% | 2300 fps | 97.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 35,940 psi | 58% | 2169 fps | 98.7% |
| Alliant Reloder-10x | <<locked>> | 80% | 52,417 psi | 84% | 2320 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 38,479 psi | 62% | 2218 fps | 98.1% |
| Alliant Reloder-16 | <<locked>> | 84% | 31,676 psi | 51% | 2126 fps | 95.1% |
| Alliant Reloder-17 | 49.2 gr | 80% | 30,821 psi | 49% | 2136 fps | 96.8% |
| Alliant Reloder-23 | <<locked>> | 92% | 28,790 psi | 46% | 2090 fps | 95.6% |
| Alliant Reloder-26 | <<locked>> | 96% | 35,288 psi | 57% | 2297 fps | 95.7% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 41,771 psi | 67% | 2277 fps | 98.3% |
| Bofors RP3 | <<locked>> | 80% | 35,259 psi | 57% | 2165 fps | 98.7% |
| Bofors RP7 | <<locked>> | 90% | 43,976 psi | 71% | 2277 fps | 95.3% |
| Hodgdon Benchmark | <<locked>> | 80% | 46,601 psi | 75% | 2267 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 43,337 psi | 69% | 2300 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 80% | 47,805 psi | 77% | 2421 fps | 99.6% |
| Hodgdon H322 | <<locked>> | 80% | 51,271 psi | 82% | 2356 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 52,156 psi | 84% | 2382 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 36,361 psi | 58% | 2172 fps | 96.3% |
| Hodgdon H414 | <<locked>> | 90% | 40,582 psi | 65% | 2300 fps | 95.2% |
| Hodgdon H4350 | <<locked>> | 92% | 47,529 psi | 76% | 2369 fps | 95.4% |
| Hodgdon H4895 | <<locked>> | 80% | 43,062 psi | 69% | 2280 fps | 99.6% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 27,122 psi | 43% | 1995 fps | 95.1% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 38,928 psi | 62% | 2257 fps | 99.3% |
| Hodgdon Superformance | <<locked>> | 92% | 43,149 psi | 69% | 2362 fps | 95.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,281 psi | 42% | 1293 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 41,466 psi | 66% | 2241 fps | 99.3% |
| IMR 3031 | <<locked>> | 80% | 42,757 psi | 69% | 2277 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 38,319 psi | 61% | 2175 fps | 98.1% |
| IMR 4166 Enduron | <<locked>> | 80% | 40,741 psi | 65% | 2192 fps | 95% |
| IMR 4198 | <<locked>> | 80% | 52,605 psi | 84% | 2280 fps | 100% |
| IMR 4350 | <<locked>> | 94% | 44,034 psi | 71% | 2300 fps | 95.3% |
| IMR 4451 Enduron | <<locked>> | 88% | 43,076 psi | 69% | 2260 fps | 95.6% |
| IMR 4831 | <<locked>> | 86% | 31,937 psi | 51% | 2126 fps | 95.5% |
| IMR 4895 | <<locked>> | 80% | 39,407 psi | 63% | 2244 fps | 98.8% |
| IMR 8208 XBR | <<locked>> | 80% | 44,744 psi | 72% | 2277 fps | 99.9% |
| Lovex D073.5 | <<locked>> | 80% | 50,647 psi | 81% | 2352 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 41,756 psi | 67% | 2257 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 43,120 psi | 69% | 2221 fps | 99.3% |
| Lovex S062 | <<locked>> | 80% | 38,174 psi | 61% | 2178 fps | 99.4% |
| Lovex S065 | <<locked>> | 86% | 37,652 psi | 60% | 2175 fps | 95.7% |
| Lovex S070 | <<locked>> | 90% | 40,132 psi | 64% | 2241 fps | 95.2% |
| Norma 201 | <<locked>> | 80% | 41,945 psi | 67% | 2231 fps | 99.7% |
| Norma 202 | <<locked>> | 80% | 42,221 psi | 68% | 2241 fps | 100% |
| Norma 203B | <<locked>> | 80% | 37,855 psi | 61% | 2208 fps | 98.5% |
| Norma 204 | <<locked>> | 98% | 49,951 psi | 80% | 2428 fps | 95.3% |
| Norma URP | <<locked>> | 84% | 31,502 psi | 51% | 2119 fps | 95% |
| Ramshot Big Game | <<locked>> | 80% | 37,289 psi | 60% | 2221 fps | 98.2% |
| Ramshot Hunter | <<locked>> | 92% | 39,566 psi | 63% | 2290 fps | 95.8% |
| Ramshot TAC | <<locked>> | 80% | 44,599 psi | 72% | 2287 fps | 97.7% |
| Ramshot Wild Boar | <<locked>> | 80% | 44,135 psi | 71% | 2306 fps | 99.4% |
| Ramshot X-Terminator | <<locked>> | 80% | 48,298 psi | 77% | 2323 fps | 99.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,600 psi | 43% | 1322 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 50,343 psi | 81% | 2349 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 39,146 psi | 63% | 2201 fps | 95.3% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 40,248 psi | 65% | 2306 fps | 98.5% |
| ReloadSwiss RS 60 | 49.2 gr | 80% | 32,822 psi | 53% | 2195 fps | 99.4% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 32,808 psi | 53% | 2178 fps | 95.3% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 35,433 psi | 57% | 2231 fps | 95.2% |
| Rottweil R 901 | <<locked>> | 80% | 45,963 psi | 74% | 2264 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 40,074 psi | 64% | 2195 fps | 99.6% |
| Rottweil R 903 | <<locked>> | 80% | 33,257 psi | 53% | 2119 fps | 98% |
| Rottweil R 907 | <<locked>> | 90% | 43,976 psi | 71% | 2277 fps | 95.3% |
| Shooters World Long Rifle | <<locked>> | 86% | 37,652 psi | 60% | 2175 fps | 95.7% |
| Shooters World Match Rifle | <<locked>> | 80% | 41,756 psi | 67% | 2257 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 38,174 psi | 61% | 2178 fps | 99.4% |
| Shooters World SW4350 | <<locked>> | 90% | 40,132 psi | 64% | 2241 fps | 95.2% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 34,301 psi | 55% | 2165 fps | 97.4% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 42,917 psi | 69% | 2264 fps | 97.8% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 41,321 psi | 66% | 2247 fps | 99% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 43,482 psi | 70% | 2192 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 36,042 psi | 58% | 2080 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 41,872 psi | 67% | 2215 fps | 95.4% |
| Somchem S321 | <<locked>> | 80% | 48,211 psi | 77% | 2346 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 42,931 psi | 69% | 2192 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 42,525 psi | 68% | 2260 fps | 99.1% |
| Somchem S355 | <<locked>> | 80% | 34,243 psi | 55% | 2126 fps | 98% |
| Somchem S365 | <<locked>> | 80% | 24,845 psi | 40% | 1985 fps | 95.5% |
| Vihtavuori N130 | <<locked>> | 80% | 49,095 psi | 79% | 2238 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 43,743 psi | 70% | 2185 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 39,320 psi | 63% | 2175 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 39,856 psi | 64% | 2182 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 32,445 psi | 52% | 2073 fps | 98.7% |
| Vihtavuori N160 | <<locked>> | 84% | 32,895 psi | 53% | 2119 fps | 95.5% |
| Vihtavuori N530 | <<locked>> | 80% | 44,715 psi | 72% | 2274 fps | 99.9% |
| Vihtavuori N540 | <<locked>> | 80% | 38,450 psi | 62% | 2178 fps | 100% |
| Vihtavuori N550 | <<locked>> | 84% | 32,271 psi | 52% | 2123 fps | 95% |
| Vihtavuori N555 | <<locked>> | 92% | 30,574 psi | 49% | 2152 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 28,863 psi | 46% | 2011 fps | 96% |
| Winchester 748 | <<locked>> | 80% | 44,164 psi | 71% | 2313 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 40,582 psi | 65% | 2300 fps | 95.2% |
| Winchester StaBALL HD | <<locked>> | 96% | 28,834 psi | 46% | 2159 fps | 96% |
| Winchester StaBALL Match | <<locked>> | 80% | 40,596 psi | 65% | 2251 fps | 99.3% |
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 119 powders for 8.5 x 55 Blaser loaded with the .338 | 250gr | Nosler Partition Gold. Alliant Reloder-17 delivers the highest muzzle velocity at 2,579 fps; across all powders the maximum-charge window runs from 1,450 fps to 2,579 fps. Accurate 3100 gives the best case fill at 100 %, and 119 of the 119 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 1:15.0 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 Power Pro 2000-MR, Alliant Reloder-17, ReloadSwiss RS 60 rank at the top here: for 8.5 x 55 Blaser with the .338 | 250gr | Nosler Partition Gold they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AR 2209, Alliant Reloder-19, 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.