Load Specifications
Load data in caliber 8.5 x 55 Blaser with .338 | 250gr | Nosler Partition RN bullet and 102 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-17, ReloadSwiss RS 60 and Alliant Power Pro 2000-MR.
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% | 53,113 psi | 85% | 2329 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 54,694 psi | 88% | 2395 fps | 100% |
| Accurate 2495 | <<locked>> | 90% | 54,708 psi | 88% | 2392 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 53,084 psi | 85% | 2408 fps | 100% |
| Accurate 2700 | <<locked>> | 90% | 54,288 psi | 87% | 2398 fps | 97.3% |
| Accurate 4064 | <<locked>> | 92% | 54,708 psi | 88% | 2434 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 53,911 psi | 86% | 2510 fps | 99.8% |
| ADI AR 2206H | <<locked>> | 88% | 55,550 psi | 89% | 2464 fps | 100% |
| ADI AR 2208 | <<locked>> | 94% | 56,362 psi | 90% | 2464 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 86% | 54,607 psi | 88% | 2421 fps | 100% |
| Alliant AR-Comp | <<locked>> | 86% | 55,187 psi | 88% | 2392 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 90% | 54,998 psi | 88% | 2572 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 56,072 psi | 90% | 2480 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 82% | 56,333 psi | 90% | 2369 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 90% | 53,563 psi | 86% | 2461 fps | 99.9% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 52,214 psi | 84% | 2516 fps | 99.8% |
| Alliant Reloder-17 | <<locked>> | 96% | 53,011 psi | 85% | 2546 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 37,043 psi | 59% | 2287 fps | 98.8% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 41,060 psi | 66% | 2425 fps | 97.9% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 55,274 psi | 89% | 2484 fps | 99.9% |
| Bofors RP3 | <<locked>> | 92% | 53,055 psi | 85% | 2451 fps | 100% |
| Bofors RP7 | <<locked>> | 96% | 53,650 psi | 86% | 2428 fps | 97.5% |
| Hodgdon Benchmark | <<locked>> | 86% | 56,405 psi | 90% | 2402 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 86% | 53,592 psi | 86% | 2448 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 84% | 55,622 psi | 89% | 2536 fps | 100% |
| Hodgdon H322 | <<locked>> | 82% | 55,405 psi | 89% | 2411 fps | 100% |
| Hodgdon H335 | <<locked>> | 82% | 56,072 psi | 90% | 2434 fps | 100% |
| Hodgdon H380 | <<locked>> | 92% | 54,172 psi | 87% | 2464 fps | 99.5% |
| Hodgdon H414 | <<locked>> | 98% | 53,287 psi | 85% | 2507 fps | 98.2% |
| Hodgdon H4350 | <<locked>> | 96% | 54,331 psi | 87% | 2474 fps | 97% |
| Hodgdon H4895 | <<locked>> | 88% | 56,072 psi | 90% | 2474 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 48,356 psi | 78% | 2408 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 54,940 psi | 88% | 2503 fps | 100% |
| Hodgdon Superformance | <<locked>> | 98% | 53,969 psi | 87% | 2539 fps | 97.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,360 psi | 57% | 1453 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 53,824 psi | 86% | 2431 fps | 100% |
| IMR 3031 | <<locked>> | 88% | 55,869 psi | 90% | 2451 fps | 100% |
| IMR 4064 | <<locked>> | 92% | 55,782 psi | 89% | 2448 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 90% | 56,130 psi | 90% | 2434 fps | 98.3% |
| IMR 4198 | <<locked>> | 82% | 56,304 psi | 90% | 2329 fps | 100% |
| IMR 4350ᴾ | <<locked>> | 100% | 53,519 psi | 86% | 2448 fps | 97.5% |
| IMR 4451 Enduron | <<locked>> | 96% | 55,376 psi | 89% | 2454 fps | 98.2% |
| IMR 4831ᴾ | <<locked>> | 100% | 50,981 psi | 82% | 2457 fps | 99.6% |
| IMR 4895 | <<locked>> | 90% | 54,911 psi | 88% | 2487 fps | 100% |
| IMR 8208 XBR | <<locked>> | 86% | 54,607 psi | 88% | 2421 fps | 100% |
| Lovex D073.5 | <<locked>> | 82% | 54,839 psi | 88% | 2408 fps | 100% |
| Lovex D073.6 | <<locked>> | 88% | 55,114 psi | 88% | 2444 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 55,347 psi | 89% | 2402 fps | 100% |
| Lovex S062 | <<locked>> | 92% | 55,680 psi | 89% | 2444 fps | 100% |
| Lovex S065 | <<locked>> | 98% | 54,737 psi | 88% | 2451 fps | 99.1% |
| Lovex S070ᴾ | <<locked>> | 100% | 55,506 psi | 89% | 2480 fps | 98.5% |
| Norma 201 | <<locked>> | 88% | 54,128 psi | 87% | 2415 fps | 100% |
| Norma 202 | <<locked>> | 88% | 54,650 psi | 88% | 2415 fps | 100% |
| Norma 203B | <<locked>> | 92% | 56,144 psi | 90% | 2493 fps | 100% |
| Norma 204ᴾ | <<locked>> | 100% | 53,896 psi | 86% | 2490 fps | 96.3% |
| Norma URPᴾ | <<locked>> | 100% | 53,214 psi | 85% | 2500 fps | 99.7% |
| Ramshot Big Game | <<locked>> | 90% | 53,011 psi | 85% | 2474 fps | 100% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 51,793 psi | 83% | 2497 fps | 98.6% |
| Ramshot TAC | <<locked>> | 86% | 54,853 psi | 88% | 2441 fps | 99.2% |
| Ramshot Wild Boar | <<locked>> | 86% | 54,273 psi | 87% | 2457 fps | 100% |
| Ramshot X-Terminator | <<locked>> | 84% | 55,622 psi | 89% | 2425 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,853 psi | 57% | 1490 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 54,186 psi | 87% | 2402 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 54,795 psi | 88% | 2451 fps | 98.7% |
| ReloadSwiss RS 52 | <<locked>> | 88% | 53,722 psi | 86% | 2516 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 52,968 psi | 85% | 2546 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 53,200 psi | 85% | 2530 fps | 99.6% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 53,519 psi | 86% | 2556 fps | 99.5% |
| Rottweil R 901 | <<locked>> | 86% | 55,274 psi | 89% | 2395 fps | 100% |
| Rottweil R 902 | <<locked>> | 90% | 54,563 psi | 87% | 2411 fps | 100% |
| Rottweil R 903 | <<locked>> | 94% | 52,924 psi | 85% | 2444 fps | 100% |
| Rottweil R 907 | <<locked>> | 96% | 53,650 psi | 86% | 2428 fps | 97.5% |
| Shooters World Long Rifle | <<locked>> | 98% | 54,737 psi | 88% | 2451 fps | 99.1% |
| Shooters World Match Rifle | <<locked>> | 88% | 55,114 psi | 88% | 2444 fps | 100% |
| Shooters World Precision | <<locked>> | 92% | 55,680 psi | 89% | 2444 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 55,506 psi | 89% | 2480 fps | 98.5% |
| SNPE Vectan SP 11 | <<locked>> | 94% | 54,795 psi | 88% | 2500 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 53,098 psi | 85% | 2421 fps | 99.4% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 53,824 psi | 86% | 2441 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 55,883 psi | 90% | 2356 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 55,854 psi | 90% | 2359 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 54,911 psi | 88% | 2405 fps | 98.1% |
| Somchem S321 | <<locked>> | 84% | 55,738 psi | 89% | 2451 fps | 100% |
| Somchem S335 | <<locked>> | 88% | 55,114 psi | 88% | 2356 fps | 100% |
| Somchem S341 | <<locked>> | 88% | 56,434 psi | 90% | 2461 fps | 100% |
| Somchem S355 | <<locked>> | 94% | 53,417 psi | 86% | 2441 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 47,529 psi | 76% | 2457 fps | 100% |
| Vihtavuori N130 | <<locked>> | 84% | 55,840 psi | 90% | 2323 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 56,072 psi | 90% | 2343 fps | 100% |
| Vihtavuori N135 | <<locked>> | 90% | 54,418 psi | 87% | 2382 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 55,201 psi | 89% | 2398 fps | 100% |
| Vihtavuori N150 | <<locked>> | 96% | 54,868 psi | 88% | 2425 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 55,738 psi | 89% | 2497 fps | 99.8% |
| Vihtavuori N530 | <<locked>> | 86% | 54,940 psi | 88% | 2418 fps | 100% |
| Vihtavuori N540 | <<locked>> | 90% | 53,185 psi | 85% | 2395 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 54,636 psi | 88% | 2503 fps | 99.7% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 40,030 psi | 64% | 2352 fps | 98.6% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 56,188 psi | 90% | 2480 fps | 100% |
| Winchester 748 | <<locked>> | 86% | 54,853 psi | 88% | 2464 fps | 100% |
| Winchester 760 | <<locked>> | 98% | 53,519 psi | 86% | 2510 fps | 98.2% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 32,996 psi | 53% | 2283 fps | 98.4% |
| Winchester StaBALL Match | <<locked>> | 88% | 53,519 psi | 86% | 2448 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% | 47,195 psi | 76% | 2254 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 51,372 psi | 82% | 2352 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 39,697 psi | 64% | 2192 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 46,398 psi | 74% | 2323 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 44,759 psi | 72% | 2257 fps | 95.3% |
| Accurate 4064 | <<locked>> | 80% | 37,536 psi | 60% | 2192 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 31,154 psi | 50% | 2129 fps | 95.3% |
| ADI AR 2206H | <<locked>> | 80% | 43,207 psi | 69% | 2287 fps | 99.3% |
| ADI AR 2208 | <<locked>> | 80% | 36,796 psi | 59% | 2159 fps | 97.6% |
| ADI Benchmark 8208 | <<locked>> | 80% | 45,266 psi | 73% | 2290 fps | 99.9% |
| Alliant AR-Comp | <<locked>> | 80% | 45,513 psi | 73% | 2277 fps | 100% |
| Alliant Power Pro 2000-MR | 50.6 gr | 80% | 39,059 psi | 63% | 2313 fps | 98.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 36,245 psi | 58% | 2178 fps | 98.8% |
| Alliant Reloder-10x | <<locked>> | 80% | 52,779 psi | 85% | 2329 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 39,001 psi | 63% | 2231 fps | 98.3% |
| Alliant Reloder-16 | <<locked>> | 84% | 32,053 psi | 51% | 2142 fps | 95.4% |
| Alliant Reloder-17 | 49.8 gr | 80% | 31,227 psi | 50% | 2149 fps | 97% |
| Alliant Reloder-23 | <<locked>> | 92% | 29,240 psi | 47% | 2106 fps | 95.9% |
| Alliant Reloder-26 | <<locked>> | 94% | 33,344 psi | 53% | 2257 fps | 95% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 42,192 psi | 68% | 2290 fps | 98.5% |
| Bofors RP3 | <<locked>> | 80% | 35,781 psi | 57% | 2182 fps | 98.9% |
| Bofors RP7 | <<locked>> | 90% | 44,599 psi | 72% | 2293 fps | 95.6% |
| Hodgdon Benchmark | <<locked>> | 80% | 47,152 psi | 76% | 2280 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 43,874 psi | 70% | 2313 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 80% | 48,385 psi | 78% | 2438 fps | 99.7% |
| Hodgdon H322 | <<locked>> | 80% | 51,909 psi | 83% | 2369 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 52,707 psi | 85% | 2395 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 36,840 psi | 59% | 2185 fps | 96.5% |
| Hodgdon H414 | <<locked>> | 90% | 41,220 psi | 66% | 2320 fps | 95.5% |
| Hodgdon H4350 | <<locked>> | 92% | 47,935 psi | 77% | 2382 fps | 95.7% |
| Hodgdon H4895 | <<locked>> | 80% | 43,613 psi | 70% | 2297 fps | 99.6% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 27,514 psi | 44% | 2008 fps | 95.4% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 39,407 psi | 63% | 2270 fps | 99.5% |
| Hodgdon Superformance | <<locked>> | 92% | 43,845 psi | 70% | 2382 fps | 95.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,339 psi | 42% | 1296 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 41,959 psi | 67% | 2254 fps | 99.4% |
| IMR 3031 | <<locked>> | 80% | 43,149 psi | 69% | 2287 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 38,609 psi | 62% | 2185 fps | 98.3% |
| IMR 4166 Enduron | <<locked>> | 80% | 41,191 psi | 66% | 2205 fps | 95.3% |
| IMR 4198 | <<locked>> | 80% | 53,055 psi | 85% | 2290 fps | 100% |
| IMR 4350 | <<locked>> | 94% | 44,382 psi | 71% | 2313 fps | 95.6% |
| IMR 4451 Enduron | <<locked>> | 86% | 41,089 psi | 66% | 2231 fps | 95.1% |
| IMR 4831 | <<locked>> | 84% | 30,487 psi | 49% | 2096 fps | 95% |
| IMR 4895 | <<locked>> | 80% | 39,943 psi | 64% | 2257 fps | 99% |
| IMR 8208 XBR | <<locked>> | 80% | 45,266 psi | 73% | 2290 fps | 99.9% |
| Lovex D073.5 | <<locked>> | 80% | 51,169 psi | 82% | 2362 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 42,293 psi | 68% | 2270 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 43,395 psi | 70% | 2228 fps | 99.3% |
| Lovex S062 | <<locked>> | 80% | 38,493 psi | 62% | 2192 fps | 99.4% |
| Lovex S065 | <<locked>> | 84% | 35,766 psi | 57% | 2142 fps | 95.2% |
| Lovex S070 | <<locked>> | 90% | 40,741 psi | 65% | 2254 fps | 95.5% |
| Norma 201 | <<locked>> | 80% | 42,467 psi | 68% | 2244 fps | 99.8% |
| Norma 202 | <<locked>> | 80% | 42,540 psi | 68% | 2251 fps | 100% |
| Norma 203B | <<locked>> | 80% | 38,377 psi | 62% | 2221 fps | 98.6% |
| Norma 204 | <<locked>> | 98% | 50,517 psi | 81% | 2441 fps | 95.6% |
| Norma URP | <<locked>> | 84% | 31,894 psi | 51% | 2133 fps | 95.3% |
| Ramshot Big Game | <<locked>> | 80% | 37,739 psi | 61% | 2234 fps | 98.3% |
| Ramshot Hunter | <<locked>> | 90% | 37,710 psi | 60% | 2257 fps | 95.3% |
| Ramshot TAC | <<locked>> | 80% | 45,020 psi | 72% | 2297 fps | 97.8% |
| Ramshot Wild Boar | <<locked>> | 80% | 44,614 psi | 72% | 2316 fps | 99.5% |
| Ramshot X-Terminator | <<locked>> | 80% | 48,791 psi | 78% | 2333 fps | 99.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,643 psi | 43% | 1329 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 50,894 psi | 82% | 2359 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 39,755 psi | 64% | 2218 fps | 95.6% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 40,843 psi | 65% | 2323 fps | 98.7% |
| ReloadSwiss RS 60 | 49.8 gr | 80% | 33,214 psi | 53% | 2208 fps | 99.6% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 33,170 psi | 53% | 2192 fps | 95.5% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 35,897 psi | 58% | 2247 fps | 95.5% |
| Rottweil R 901 | <<locked>> | 80% | 46,311 psi | 74% | 2274 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 40,379 psi | 65% | 2205 fps | 99.6% |
| Rottweil R 903 | <<locked>> | 80% | 33,736 psi | 54% | 2136 fps | 98.2% |
| Rottweil R 907 | <<locked>> | 90% | 44,599 psi | 72% | 2293 fps | 95.6% |
| Shooters World Long Rifle | <<locked>> | 84% | 35,766 psi | 57% | 2142 fps | 95.2% |
| Shooters World Match Rifle | <<locked>> | 80% | 42,293 psi | 68% | 2270 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 38,493 psi | 62% | 2192 fps | 99.4% |
| Shooters World SW4350 | <<locked>> | 90% | 40,741 psi | 65% | 2254 fps | 95.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 34,722 psi | 56% | 2178 fps | 97.7% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 43,395 psi | 70% | 2277 fps | 98% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 41,785 psi | 67% | 2260 fps | 99.1% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 43,772 psi | 70% | 2198 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 36,347 psi | 58% | 2090 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 39,813 psi | 64% | 2185 fps | 95% |
| Somchem S321 | <<locked>> | 80% | 48,733 psi | 78% | 2359 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 43,482 psi | 70% | 2205 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 43,004 psi | 69% | 2274 fps | 99.2% |
| Somchem S355 | <<locked>> | 80% | 34,708 psi | 56% | 2139 fps | 98.2% |
| Somchem S365 | <<locked>> | 80% | 25,179 psi | 40% | 1998 fps | 95.8% |
| Vihtavuori N130 | <<locked>> | 80% | 49,472 psi | 79% | 2247 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 44,077 psi | 71% | 2195 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 39,711 psi | 64% | 2185 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 40,350 psi | 65% | 2195 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 32,938 psi | 53% | 2087 fps | 98.8% |
| Vihtavuori N160 | <<locked>> | 84% | 33,286 psi | 53% | 2133 fps | 95.7% |
| Vihtavuori N530 | <<locked>> | 80% | 45,252 psi | 73% | 2287 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 38,914 psi | 62% | 2192 fps | 100% |
| Vihtavuori N550 | <<locked>> | 84% | 32,663 psi | 52% | 2136 fps | 95.3% |
| Vihtavuori N555 | <<locked>> | 90% | 29,167 psi | 47% | 2123 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 29,167 psi | 47% | 2021 fps | 96.2% |
| Winchester 748 | <<locked>> | 80% | 44,744 psi | 72% | 2326 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 41,220 psi | 66% | 2320 fps | 95.5% |
| Winchester StaBALL HD | <<locked>> | 94% | 27,485 psi | 44% | 2123 fps | 95.2% |
| Winchester StaBALL Match | <<locked>> | 80% | 41,060 psi | 66% | 2264 fps | 99.4% |
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 118 powders for 8.5 x 55 Blaser loaded with the .338 | 250gr | Nosler Partition RN. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,572 fps; across all powders the maximum-charge window runs from 1,453 fps to 2,572 fps. Accurate 3100 gives the best case fill at 100 %, and 118 of the 118 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (430 MPa), the top charges use 51–90 %, leaving at least 10 % headroom. The 250.0 gr projectile in 0.338" calls for a 1:15.5 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 Reloder-17, ReloadSwiss RS 60, Alliant Power Pro 2000-MR rank at the top here: for 8.5 x 55 Blaser with the .338 | 250gr | Nosler Partition RN 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.