Load Specifications
Load data in caliber 8.5 x 55 Blaser with .338 | 250gr | Hornady InterLock RN bullet and 100 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% | 55,724 psi | 89% | 2379 fps | 100% |
| Accurate 2495 | <<locked>> | 88% | 54,331 psi | 87% | 2405 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 55,883 psi | 90% | 2461 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 53,403 psi | 86% | 2411 fps | 97.6% |
| Accurate 3100ᴾ | <<locked>> | 100% | 41,075 psi | 66% | 2326 fps | 96.9% |
| Accurate 4064 | <<locked>> | 90% | 54,259 psi | 87% | 2448 fps | 100% |
| Accurate 4350 | <<locked>> | 98% | 53,635 psi | 86% | 2526 fps | 99.9% |
| ADI AR 2206H | <<locked>> | 86% | 54,607 psi | 88% | 2474 fps | 100% |
| ADI AR 2208 | <<locked>> | 92% | 55,608 psi | 89% | 2477 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 84% | 53,780 psi | 86% | 2431 fps | 100% |
| Alliant AR-Comp | <<locked>> | 84% | 54,766 psi | 88% | 2405 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 88% | 54,186 psi | 87% | 2585 fps | 100% |
| Alliant Power Pro Varmintᴾ | <<locked>> | 100% | 48,631 psi | 78% | 2457 fps | 95.8% |
| Alliant Power Pro Varmintᴾ | <<locked>> | 100% | 48,631 psi | 78% | 2457 fps | 95.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 55,492 psi | 89% | 2493 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 90% | 56,115 psi | 90% | 2513 fps | 100% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 54,853 psi | 88% | 2572 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 96% | 56,231 psi | 90% | 2608 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 39,276 psi | 63% | 2352 fps | 99.4% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 43,816 psi | 70% | 2500 fps | 98.9% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 54,288 psi | 87% | 2493 fps | 99.9% |
| Bofors RP3 | <<locked>> | 92% | 56,246 psi | 90% | 2510 fps | 100% |
| Bofors RP7 | <<locked>> | 96% | 56,318 psi | 90% | 2487 fps | 98.3% |
| Hodgdon Benchmark | <<locked>> | 84% | 55,492 psi | 89% | 2411 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 86% | 56,420 psi | 90% | 2503 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 82% | 54,708 psi | 88% | 2546 fps | 100% |
| Hodgdon H380 | <<locked>> | 90% | 53,505 psi | 86% | 2477 fps | 99.7% |
| Hodgdon H414 | <<locked>> | 96% | 52,881 psi | 85% | 2526 fps | 98.4% |
| Hodgdon H4350 | <<locked>> | 94% | 53,940 psi | 86% | 2493 fps | 97.4% |
| Hodgdon H4895 | <<locked>> | 86% | 55,172 psi | 88% | 2484 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 51,155 psi | 82% | 2464 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 88% | 54,447 psi | 87% | 2513 fps | 100% |
| Hodgdon Superformance | <<locked>> | 96% | 53,388 psi | 86% | 2559 fps | 98.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,679 psi | 57% | 1480 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 56,434 psi | 90% | 2484 fps | 100% |
| IMR 3031 | <<locked>> | 86% | 55,259 psi | 89% | 2461 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 55,245 psi | 89% | 2461 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 88% | 55,085 psi | 88% | 2444 fps | 98.5% |
| IMR 4350ᴾ | <<locked>> | 100% | 56,231 psi | 90% | 2510 fps | 98.3% |
| IMR 4451 Enduron | <<locked>> | 94% | 54,694 psi | 88% | 2470 fps | 98.4% |
| IMR 4831ᴾ | <<locked>> | 100% | 54,302 psi | 87% | 2520 fps | 99.9% |
| IMR 4895 | <<locked>> | 88% | 54,244 psi | 87% | 2497 fps | 100% |
| IMR 8208 XBR | <<locked>> | 84% | 53,780 psi | 86% | 2431 fps | 100% |
| Lovex D073.6 | <<locked>> | 86% | 54,476 psi | 87% | 2454 fps | 100% |
| Lovex S060 | <<locked>> | 86% | 54,360 psi | 87% | 2411 fps | 100% |
| Lovex S062 | <<locked>> | 90% | 54,984 psi | 88% | 2454 fps | 100% |
| Lovex S065 | <<locked>> | 96% | 54,143 psi | 87% | 2464 fps | 99.3% |
| Lovex S070 | <<locked>> | 98% | 54,969 psi | 88% | 2497 fps | 98.7% |
| Norma 201 | <<locked>> | 86% | 53,330 psi | 86% | 2425 fps | 100% |
| Norma 202 | <<locked>> | 86% | 53,838 psi | 86% | 2425 fps | 100% |
| Norma 203B | <<locked>> | 90% | 55,347 psi | 89% | 2503 fps | 100% |
| Norma 204 | <<locked>> | 98% | 53,330 psi | 86% | 2507 fps | 96.7% |
| Norma MRPᴾ | <<locked>> | 100% | 43,801 psi | 70% | 2457 fps | 96.4% |
| Norma URPᴾ | <<locked>> | 100% | 56,289 psi | 90% | 2562 fps | 99.9% |
| Ramshot Big Game | <<locked>> | 90% | 55,927 psi | 90% | 2530 fps | 100% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 54,926 psi | 88% | 2562 fps | 99.2% |
| Ramshot TAC | <<locked>> | 84% | 53,838 psi | 86% | 2451 fps | 99.4% |
| Ramshot Wild Boar | <<locked>> | 84% | 53,505 psi | 86% | 2467 fps | 100% |
| Ramshot X-Terminator | <<locked>> | 82% | 54,447 psi | 87% | 2434 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,172 psi | 58% | 1516 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 53,911 psi | 86% | 2464 fps | 98.8% |
| ReloadSwiss RS 52 | <<locked>> | 86% | 53,171 psi | 85% | 2530 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 56,043 psi | 90% | 2605 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 53,345 psi | 86% | 2549 fps | 99.8% |
| ReloadSwiss RS 70 | <<locked>> | 98% | 52,823 psi | 85% | 2572 fps | 99.7% |
| Rottweil R 901 | <<locked>> | 84% | 54,447 psi | 87% | 2405 fps | 100% |
| Rottweil R 902 | <<locked>> | 88% | 54,012 psi | 87% | 2425 fps | 100% |
| Rottweil R 903 | <<locked>> | 94% | 56,086 psi | 90% | 2503 fps | 100% |
| Rottweil R 907 | <<locked>> | 96% | 56,318 psi | 90% | 2487 fps | 98.3% |
| Shooters World Long Rifle | <<locked>> | 96% | 54,143 psi | 87% | 2464 fps | 99.3% |
| Shooters World Match Rifle | <<locked>> | 86% | 54,476 psi | 87% | 2454 fps | 100% |
| Shooters World Precision | <<locked>> | 90% | 54,984 psi | 88% | 2454 fps | 100% |
| Shooters World SW4350 | <<locked>> | 98% | 54,969 psi | 88% | 2497 fps | 98.7% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 54,041 psi | 87% | 2513 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 55,724 psi | 89% | 2477 fps | 99.7% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 53,098 psi | 85% | 2451 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 54,984 psi | 88% | 2369 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 54,969 psi | 88% | 2365 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 54,302 psi | 87% | 2421 fps | 98.4% |
| Somchem S321 | <<locked>> | 82% | 54,694 psi | 88% | 2457 fps | 100% |
| Somchem S335 | <<locked>> | 86% | 54,201 psi | 87% | 2365 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 55,332 psi | 89% | 2467 fps | 100% |
| Somchem S355 | <<locked>> | 94% | 56,173 psi | 90% | 2497 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 50,546 psi | 81% | 2516 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 47,210 psi | 76% | 2418 fps | 96.7% |
| Vihtavuori N130 | <<locked>> | 82% | 54,737 psi | 88% | 2329 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 55,259 psi | 89% | 2352 fps | 100% |
| Vihtavuori N135 | <<locked>> | 88% | 53,780 psi | 86% | 2392 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 54,549 psi | 87% | 2408 fps | 100% |
| Vihtavuori N150 | <<locked>> | 94% | 54,331 psi | 87% | 2438 fps | 100% |
| Vihtavuori N160 | <<locked>> | 98% | 55,274 psi | 89% | 2510 fps | 99.9% |
| Vihtavuori N530 | <<locked>> | 84% | 53,983 psi | 87% | 2428 fps | 100% |
| Vihtavuori N540 | <<locked>> | 90% | 55,825 psi | 90% | 2448 fps | 100% |
| Vihtavuori N550 | <<locked>> | 98% | 54,375 psi | 87% | 2520 fps | 99.8% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 43,163 psi | 69% | 2421 fps | 99.3% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 55,521 psi | 89% | 2493 fps | 100% |
| Winchester 748 | <<locked>> | 84% | 53,940 psi | 86% | 2470 fps | 100% |
| Winchester 760 | <<locked>> | 96% | 53,171 psi | 85% | 2530 fps | 98.5% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 35,114 psi | 56% | 2362 fps | 99.5% |
| Winchester StaBALL Match | <<locked>> | 86% | 52,692 psi | 84% | 2457 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% | 49,298 psi | 79% | 2300 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 42,047 psi | 67% | 2244 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 48,979 psi | 79% | 2375 fps | 100% |
| Accurate 2700 | <<locked>> | 82% | 43,830 psi | 70% | 2267 fps | 95.5% |
| Accurate 3100 | <<locked>> | 96% | 35,839 psi | 57% | 2231 fps | 95.3% |
| Accurate 4064 | <<locked>> | 80% | 39,769 psi | 64% | 2241 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 31,096 psi | 50% | 2142 fps | 95.6% |
| ADI AR 2206H | <<locked>> | 80% | 45,426 psi | 73% | 2343 fps | 99.7% |
| ADI AR 2208 | <<locked>> | 80% | 38,638 psi | 62% | 2211 fps | 98.3% |
| ADI Benchmark 8208 | <<locked>> | 80% | 47,514 psi | 76% | 2343 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 47,877 psi | 77% | 2320 fps | 100% |
| Alliant Power Pro 2000-MR | 53.3 gr | 80% | 41,191 psi | 66% | 2375 fps | 98.9% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 45,556 psi | 73% | 2408 fps | 95% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 45,556 psi | 73% | 2408 fps | 95% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 38,203 psi | 61% | 2231 fps | 99.4% |
| Alliant Reloder-15 | <<locked>> | 80% | 41,147 psi | 66% | 2290 fps | 99% |
| Alliant Reloder-16 | <<locked>> | 82% | 31,720 psi | 51% | 2156 fps | 95.8% |
| Alliant Reloder-17 | 52.5 gr | 80% | 32,967 psi | 53% | 2211 fps | 98.1% |
| Alliant Reloder-23 | <<locked>> | 88% | 27,398 psi | 44% | 2077 fps | 95.4% |
| Alliant Reloder-26 | <<locked>> | 92% | 33,257 psi | 53% | 2277 fps | 95.6% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 44,570 psi | 71% | 2349 fps | 99.1% |
| Bofors RP3 | <<locked>> | 80% | 37,898 psi | 61% | 2238 fps | 99.4% |
| Bofors RP7 | <<locked>> | 86% | 41,292 psi | 66% | 2257 fps | 95.1% |
| Hodgdon Benchmark | <<locked>> | 80% | 49,139 psi | 79% | 2329 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 46,209 psi | 74% | 2365 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 80% | 51,198 psi | 82% | 2497 fps | 99.9% |
| Hodgdon H380 | <<locked>> | 80% | 38,827 psi | 62% | 2244 fps | 97.5% |
| Hodgdon H414 | <<locked>> | 86% | 38,159 psi | 61% | 2280 fps | 95% |
| Hodgdon H4350 | <<locked>> | 88% | 44,657 psi | 72% | 2349 fps | 95.3% |
| Hodgdon H4895 | <<locked>> | 80% | 45,890 psi | 74% | 2349 fps | 99.9% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 27,253 psi | 44% | 2018 fps | 95.7% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 41,771 psi | 67% | 2329 fps | 99.8% |
| Hodgdon Superformance | 62.4 gr | 90% | 43,163 psi | 69% | 2395 fps | 95.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,629 psi | 43% | 1319 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 43,888 psi | 70% | 2306 fps | 99.8% |
| IMR 3031 | <<locked>> | 80% | 45,687 psi | 73% | 2339 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 40,538 psi | 65% | 2241 fps | 98.9% |
| IMR 4166 Enduron | <<locked>> | 80% | 43,062 psi | 69% | 2260 fps | 96.2% |
| IMR 4350 | <<locked>> | 90% | 41,394 psi | 66% | 2283 fps | 95.2% |
| IMR 4451 Enduron | <<locked>> | 84% | 40,350 psi | 65% | 2241 fps | 95.4% |
| IMR 4831 | <<locked>> | 82% | 30,356 psi | 49% | 2106 fps | 95.3% |
| IMR 4895 | <<locked>> | 80% | 42,163 psi | 68% | 2316 fps | 99.5% |
| IMR 8208 XBR | <<locked>> | 80% | 47,514 psi | 76% | 2343 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 44,585 psi | 71% | 2323 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 45,339 psi | 73% | 2280 fps | 99.7% |
| Lovex S062 | <<locked>> | 80% | 40,509 psi | 65% | 2244 fps | 99.8% |
| Lovex S065 | <<locked>> | 82% | 35,375 psi | 57% | 2152 fps | 95.5% |
| Lovex S070 | <<locked>> | 86% | 37,869 psi | 61% | 2221 fps | 95% |
| Norma 201 | <<locked>> | 80% | 44,527 psi | 71% | 2297 fps | 100% |
| Norma 202 | <<locked>> | 80% | 44,657 psi | 72% | 2300 fps | 100% |
| Norma 203B | <<locked>> | 80% | 40,524 psi | 65% | 2280 fps | 99.2% |
| Norma 204 | <<locked>> | 94% | 46,644 psi | 75% | 2408 fps | 95.1% |
| Norma MRP | <<locked>> | 98% | 41,017 psi | 66% | 2405 fps | 95.5% |
| Norma URP | <<locked>> | 82% | 31,691 psi | 51% | 2146 fps | 95.6% |
| Ramshot Big Game | <<locked>> | 80% | 39,856 psi | 64% | 2290 fps | 99% |
| Ramshot Hunter | <<locked>> | 88% | 37,449 psi | 60% | 2274 fps | 95.7% |
| Ramshot TAC | <<locked>> | 80% | 47,253 psi | 76% | 2356 fps | 98.6% |
| Ramshot Wild Boar | <<locked>> | 80% | 46,833 psi | 75% | 2372 fps | 99.8% |
| Ramshot X-Terminator | <<locked>> | 80% | 50,966 psi | 82% | 2385 fps | 99.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,948 psi | 43% | 1352 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 39,131 psi | 63% | 2228 fps | 95.9% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 43,294 psi | 69% | 2379 fps | 99.3% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 35,070 psi | 56% | 2267 fps | 99.9% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 30,966 psi | 50% | 2156 fps | 95% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 35,404 psi | 57% | 2257 fps | 95.9% |
| Rottweil R 901 | <<locked>> | 80% | 48,617 psi | 78% | 2326 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 42,424 psi | 68% | 2257 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 80% | 35,665 psi | 57% | 2188 fps | 98.8% |
| Rottweil R 907 | <<locked>> | 86% | 41,292 psi | 66% | 2257 fps | 95.1% |
| Shooters World Long Rifle | <<locked>> | 82% | 35,375 psi | 57% | 2152 fps | 95.5% |
| Shooters World Match Rifle | <<locked>> | 80% | 44,585 psi | 71% | 2323 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 40,509 psi | 65% | 2244 fps | 99.8% |
| Shooters World SW4350 | <<locked>> | 86% | 37,869 psi | 61% | 2221 fps | 95% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 36,608 psi | 59% | 2234 fps | 98.4% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 45,585 psi | 73% | 2333 fps | 98.7% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 43,845 psi | 70% | 2313 fps | 99.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 45,687 psi | 73% | 2247 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 38,087 psi | 61% | 2136 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 39,247 psi | 63% | 2192 fps | 95.2% |
| Somchem S321 | <<locked>> | 80% | 51,300 psi | 82% | 2415 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 45,440 psi | 73% | 2251 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 45,397 psi | 73% | 2329 fps | 99.7% |
| Somchem S355 | <<locked>> | 80% | 36,593 psi | 59% | 2195 fps | 98.8% |
| Somchem S365 | <<locked>> | 80% | 26,585 psi | 43% | 2054 fps | 97% |
| Somchem S385 | <<locked>> | 96% | 41,321 psi | 66% | 2320 fps | 95.2% |
| Vihtavuori N130 | <<locked>> | 80% | 51,503 psi | 83% | 2290 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 46,050 psi | 74% | 2238 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 41,843 psi | 67% | 2231 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 42,395 psi | 68% | 2244 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 34,708 psi | 56% | 2136 fps | 99.4% |
| Vihtavuori N160 | <<locked>> | 80% | 30,980 psi | 50% | 2100 fps | 95.2% |
| Vihtavuori N530 | <<locked>> | 80% | 47,529 psi | 76% | 2339 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 40,886 psi | 66% | 2241 fps | 100% |
| Vihtavuori N550 | <<locked>> | 82% | 32,387 psi | 52% | 2146 fps | 95.6% |
| Vihtavuori N555 | <<locked>> | 88% | 29,283 psi | 47% | 2139 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 30,748 psi | 49% | 2080 fps | 97.4% |
| Winchester 748 | <<locked>> | 80% | 47,239 psi | 76% | 2382 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 38,392 psi | 62% | 2283 fps | 95% |
| Winchester StaBALL HD | <<locked>> | 92% | 27,267 psi | 44% | 2139 fps | 95.8% |
| Winchester StaBALL Match | <<locked>> | 80% | 43,323 psi | 69% | 2320 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 100 powders for 8.5 x 55 Blaser loaded with the .338 | 250gr | Hornady InterLock RN. Alliant Reloder-17 delivers the highest muzzle velocity at 2,608 fps; across all powders the maximum-charge window runs from 1,480 fps to 2,608 fps. Accurate 3100 gives the best case fill at 100 %, and 100 of the 100 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 250.0 gr projectile in 0.338" calls for a 1:6.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Alliant Power Pro Varmint, 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 | 250gr | Hornady InterLock RN 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.