Load Specifications
Load data in caliber 8.5 x 55 Blaser with .338 | 225gr | Barnes XLC S bullet and 102 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.
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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>> | 86% | 55,608 psi | 89% | 2470 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 53,925 psi | 86% | 2493 fps | 100% |
| Accurate 2495 | <<locked>> | 90% | 54,462 psi | 87% | 2500 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 55,230 psi | 89% | 2549 fps | 100% |
| Accurate 2700 | <<locked>> | 92% | 56,072 psi | 90% | 2516 fps | 96.2% |
| Accurate 4064 | <<locked>> | 92% | 53,896 psi | 86% | 2536 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 51,837 psi | 83% | 2589 fps | 98.9% |
| ADI AR 2206H | <<locked>> | 88% | 53,853 psi | 86% | 2549 fps | 99.7% |
| ADI AR 2208 | <<locked>> | 94% | 54,317 psi | 87% | 2543 fps | 99.4% |
| ADI Benchmark 8208 | <<locked>> | 88% | 56,115 psi | 90% | 2552 fps | 100% |
| Alliant AR-Comp | <<locked>> | 86% | 53,258 psi | 85% | 2493 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 54,766 psi | 88% | 2602 fps | 99.9% |
| Alliant Power Pro 2000-MR | <<locked>> | 92% | 56,173 psi | 90% | 2700 fps | 99.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 54,389 psi | 87% | 2572 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 82% | 55,056 psi | 88% | 2470 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 92% | 55,042 psi | 88% | 2589 fps | 99.6% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 50,038 psi | 80% | 2585 fps | 98.9% |
| Alliant Reloder-17 | <<locked>> | 98% | 54,172 psi | 87% | 2671 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 36,477 psi | 58% | 2356 fps | 97.1% |
| Baschieri & Pellagri 106 | <<locked>> | 82% | 56,202 psi | 90% | 2451 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 53,200 psi | 85% | 2562 fps | 99.1% |
| Bofors RP3 | <<locked>> | 94% | 55,187 psi | 88% | 2589 fps | 100% |
| Bofors RP7 | <<locked>> | 98% | 55,114 psi | 88% | 2546 fps | 96.3% |
| Hodgdon Benchmark | <<locked>> | 86% | 55,013 psi | 88% | 2493 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 88% | 55,463 psi | 89% | 2585 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 84% | 53,127 psi | 85% | 2618 fps | 99.5% |
| Hodgdon H322 | <<locked>> | 82% | 53,417 psi | 86% | 2503 fps | 100% |
| Hodgdon H335 | <<locked>> | 82% | 54,447 psi | 87% | 2530 fps | 100% |
| Hodgdon H380 | <<locked>> | 94% | 56,188 psi | 90% | 2595 fps | 99% |
| Hodgdon H414ᴾ | <<locked>> | 100% | 54,346 psi | 87% | 2628 fps | 97% |
| Hodgdon H4350 | <<locked>> | 98% | 55,463 psi | 89% | 2589 fps | 95.7% |
| Hodgdon H4895 | <<locked>> | 88% | 54,346 psi | 87% | 2562 fps | 99.9% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 46,615 psi | 75% | 2480 fps | 99.3% |
| Hodgdon LEVERevolution | <<locked>> | 92% | 56,333 psi | 90% | 2635 fps | 100% |
| Hodgdon Superformanceᴾ | <<locked>> | 100% | 55,680 psi | 89% | 2657 fps | 96.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,534 psi | 57% | 1526 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 55,245 psi | 89% | 2559 fps | 99.9% |
| IMR 3031 | <<locked>> | 88% | 53,911 psi | 86% | 2549 fps | 100% |
| IMR 4064 | <<locked>> | 92% | 54,186 psi | 87% | 2533 fps | 99.5% |
| IMR 4166 Enduron | <<locked>> | 90% | 54,447 psi | 87% | 2510 fps | 96.8% |
| IMR 4198 | <<locked>> | 82% | 54,520 psi | 87% | 2425 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 96% | 53,795 psi | 86% | 2530 fps | 96.6% |
| IMR 4831ᴾ | <<locked>> | 100% | 49,008 psi | 79% | 2533 fps | 98.6% |
| IMR 4895 | <<locked>> | 92% | 56,391 psi | 90% | 2618 fps | 99.9% |
| IMR 8208 XBR | <<locked>> | 88% | 56,115 psi | 90% | 2552 fps | 100% |
| Lovex D073.5 | <<locked>> | 82% | 53,693 psi | 86% | 2500 fps | 100% |
| Lovex D073.6 | <<locked>> | 88% | 53,476 psi | 86% | 2536 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 53,693 psi | 86% | 2484 fps | 99.7% |
| Lovex S062 | <<locked>> | 92% | 54,186 psi | 87% | 2533 fps | 100% |
| Lovex S065ᴾ | <<locked>> | 100% | 56,260 psi | 90% | 2572 fps | 98.4% |
| Lovex S070ᴾ | <<locked>> | 100% | 53,563 psi | 86% | 2552 fps | 96.9% |
| Norma 201 | <<locked>> | 88% | 53,243 psi | 85% | 2507 fps | 100% |
| Norma 202 | <<locked>> | 90% | 56,347 psi | 90% | 2549 fps | 100% |
| Norma 203B | <<locked>> | 92% | 54,288 psi | 87% | 2579 fps | 99.8% |
| Norma URPᴾ | <<locked>> | 100% | 50,691 psi | 81% | 2572 fps | 98.7% |
| Ramshot Big Game | <<locked>> | 92% | 54,099 psi | 87% | 2598 fps | 99.7% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 49,922 psi | 80% | 2566 fps | 97% |
| Ramshot TAC | <<locked>> | 86% | 53,229 psi | 85% | 2520 fps | 98.1% |
| Ramshot Wild Boar | <<locked>> | 88% | 55,941 psi | 90% | 2589 fps | 99.8% |
| Ramshot X-Terminator | <<locked>> | 84% | 53,969 psi | 87% | 2510 fps | 99.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,085 psi | 58% | 1565 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 55,840 psi | 90% | 2536 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 94% | 56,420 psi | 90% | 2575 fps | 97.8% |
| ReloadSwiss RS 52 | <<locked>> | 90% | 54,766 psi | 88% | 2644 fps | 99.6% |
| ReloadSwiss RS 60 | <<locked>> | 96% | 54,157 psi | 87% | 2677 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 50,850 psi | 82% | 2605 fps | 98.6% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 51,372 psi | 82% | 2621 fps | 98.1% |
| Rottweil R 901 | <<locked>> | 86% | 54,868 psi | 88% | 2497 fps | 100% |
| Rottweil R 902 | <<locked>> | 90% | 53,693 psi | 86% | 2507 fps | 100% |
| Rottweil R 903 | <<locked>> | 96% | 54,752 psi | 88% | 2575 fps | 99.9% |
| Rottweil R 907 | <<locked>> | 98% | 55,114 psi | 88% | 2546 fps | 96.3% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 56,260 psi | 90% | 2572 fps | 98.4% |
| Shooters World Match Rifle | <<locked>> | 88% | 53,476 psi | 86% | 2536 fps | 100% |
| Shooters World Precision | <<locked>> | 92% | 54,186 psi | 87% | 2533 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 53,563 psi | 86% | 2552 fps | 96.9% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 55,535 psi | 89% | 2507 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 96% | 55,869 psi | 90% | 2628 fps | 99.8% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 55,492 psi | 89% | 2484 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 88% | 55,158 psi | 88% | 2549 fps | 98.7% |
| SNPE Vectan SP 9 | <<locked>> | 90% | 55,303 psi | 89% | 2569 fps | 99.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 54,607 psi | 88% | 2451 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 53,940 psi | 86% | 2448 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 53,258 psi | 85% | 2480 fps | 96.5% |
| Somchem S321 | <<locked>> | 84% | 54,128 psi | 87% | 2543 fps | 100% |
| Somchem S335 | <<locked>> | 88% | 54,056 psi | 87% | 2454 fps | 100% |
| Somchem S341 | <<locked>> | 88% | 54,360 psi | 87% | 2543 fps | 99.7% |
| Somchem S355 | <<locked>> | 96% | 55,143 psi | 88% | 2572 fps | 99.9% |
| Somchem S365ᴾ | <<locked>> | 100% | 45,803 psi | 73% | 2536 fps | 99.9% |
| Vihtavuori N130 | <<locked>> | 84% | 54,592 psi | 88% | 2421 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 54,476 psi | 87% | 2438 fps | 100% |
| Vihtavuori N135 | <<locked>> | 92% | 55,738 psi | 89% | 2513 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 53,403 psi | 86% | 2487 fps | 100% |
| Vihtavuori N150 | <<locked>> | 96% | 52,953 psi | 85% | 2510 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 53,432 psi | 86% | 2572 fps | 98.9% |
| Vihtavuori N530 | <<locked>> | 86% | 53,476 psi | 86% | 2510 fps | 100% |
| Vihtavuori N540 | <<locked>> | 92% | 55,100 psi | 88% | 2533 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 52,605 psi | 84% | 2582 fps | 98.7% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 38,972 psi | 62% | 2425 fps | 97.1% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 54,143 psi | 87% | 2559 fps | 99.9% |
| Winchester 748 | <<locked>> | 88% | 56,072 psi | 90% | 2595 fps | 100% |
| Winchester 760ᴾ | <<locked>> | 100% | 54,665 psi | 88% | 2631 fps | 97.1% |
| Winchester StaBALL Match | <<locked>> | 90% | 55,100 psi | 88% | 2579 fps | 99.9% |
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% | 46,717 psi | 75% | 2352 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 50,691 psi | 81% | 2451 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 40,335 psi | 65% | 2297 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 45,745 psi | 73% | 2415 fps | 100% |
| Accurate 2700 | <<locked>> | 90% | 52,750 psi | 85% | 2470 fps | 95.5% |
| Accurate 4064 | <<locked>> | 80% | 38,116 psi | 61% | 2290 fps | 99.9% |
| Accurate 4350 | <<locked>> | 88% | 35,259 psi | 57% | 2303 fps | 95.1% |
| ADI AR 2206H | <<locked>> | 80% | 42,598 psi | 68% | 2369 fps | 98.3% |
| ADI AR 2208 | <<locked>> | 80% | 36,361 psi | 58% | 2234 fps | 96.1% |
| ADI Benchmark 8208 | <<locked>> | 80% | 44,367 psi | 71% | 2375 fps | 99.4% |
| Alliant AR-Comp | <<locked>> | 80% | 44,237 psi | 71% | 2372 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 51,387 psi | 82% | 2552 fps | 99.8% |
| Alliant Power Pro 2000-MR | 50.1 gr | 80% | 38,421 psi | 62% | 2385 fps | 96.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 36,100 psi | 58% | 2264 fps | 97.7% |
| Alliant Reloder-10x | <<locked>> | 80% | 52,040 psi | 83% | 2431 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 38,551 psi | 62% | 2313 fps | 96.9% |
| Alliant Reloder-16 | <<locked>> | 88% | 35,752 psi | 57% | 2306 fps | 95% |
| Alliant Reloder-17 | <<locked>> | 80% | 31,241 psi | 50% | 2224 fps | 95.1% |
| Alliant Reloder-23 | <<locked>> | 96% | 32,721 psi | 52% | 2267 fps | 95.6% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 52,881 psi | 85% | 2408 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 41,278 psi | 66% | 2369 fps | 97.1% |
| Bofors RP3 | <<locked>> | 80% | 35,781 psi | 57% | 2267 fps | 97.8% |
| Bofors RP7 | <<locked>> | 94% | 49,139 psi | 79% | 2454 fps | 95% |
| Hodgdon Benchmark | <<locked>> | 80% | 46,340 psi | 74% | 2369 fps | 99.8% |
| Hodgdon BL-C2 | <<locked>> | 80% | 43,105 psi | 69% | 2398 fps | 99.6% |
| Hodgdon CFE223 | <<locked>> | 80% | 46,746 psi | 75% | 2516 fps | 98.7% |
| Hodgdon H322 | <<locked>> | 80% | 50,459 psi | 81% | 2464 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 50,995 psi | 82% | 2484 fps | 100% |
| Hodgdon H380 | <<locked>> | 82% | 38,725 psi | 62% | 2310 fps | 95.6% |
| Hodgdon H414 | <<locked>> | 96% | 48,080 psi | 77% | 2530 fps | 95.7% |
| Hodgdon H4350 | <<locked>> | 96% | 52,228 psi | 84% | 2543 fps | 95% |
| Hodgdon H4895 | <<locked>> | 80% | 42,888 psi | 69% | 2379 fps | 98.8% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 31,125 psi | 50% | 2172 fps | 95.3% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 38,595 psi | 62% | 2352 fps | 98.4% |
| Hodgdon Superformance | <<locked>> | 98% | 52,054 psi | 83% | 2605 fps | 95.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,542 psi | 43% | 1362 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 41,176 psi | 66% | 2336 fps | 98.5% |
| IMR 3031 | <<locked>> | 80% | 42,105 psi | 68% | 2379 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 38,159 psi | 61% | 2264 fps | 96.9% |
| IMR 4166 Enduron | <<locked>> | 86% | 48,327 psi | 77% | 2415 fps | 95.5% |
| IMR 4198 | <<locked>> | 80% | 51,735 psi | 83% | 2388 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 92% | 47,790 psi | 77% | 2438 fps | 95.3% |
| IMR 4831 | <<locked>> | 90% | 36,390 psi | 58% | 2310 fps | 95.6% |
| IMR 4895 | <<locked>> | 80% | 39,363 psi | 63% | 2339 fps | 97.8% |
| IMR 8208 XBR | <<locked>> | 80% | 44,367 psi | 71% | 2375 fps | 99.4% |
| Lovex D073.5 | <<locked>> | 80% | 50,270 psi | 81% | 2454 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 41,829 psi | 67% | 2359 fps | 99.9% |
| Lovex S060 | <<locked>> | 80% | 42,743 psi | 69% | 2310 fps | 98.4% |
| Lovex S062 | <<locked>> | 80% | 38,319 psi | 61% | 2274 fps | 98.6% |
| Lovex S065 | <<locked>> | 90% | 42,438 psi | 68% | 2352 fps | 95.6% |
| Lovex S070 | <<locked>> | 94% | 45,252 psi | 73% | 2421 fps | 95.1% |
| Norma 201 | <<locked>> | 80% | 42,322 psi | 68% | 2336 fps | 99.2% |
| Norma 202 | <<locked>> | 80% | 42,177 psi | 68% | 2343 fps | 100% |
| Norma 203B | <<locked>> | 80% | 37,956 psi | 61% | 2303 fps | 97.4% |
| Norma URP | <<locked>> | 88% | 35,708 psi | 57% | 2300 fps | 95% |
| Ramshot Big Game | <<locked>> | 80% | 37,173 psi | 60% | 2310 fps | 96.9% |
| Ramshot Hunter | <<locked>> | 96% | 44,353 psi | 71% | 2474 fps | 95.6% |
| Ramshot TAC | <<locked>> | 80% | 44,309 psi | 71% | 2379 fps | 96.3% |
| Ramshot Wild Boar | <<locked>> | 80% | 43,482 psi | 70% | 2395 fps | 98.5% |
| Ramshot X-Terminator | <<locked>> | 80% | 47,819 psi | 77% | 2418 fps | 99% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,122 psi | 43% | 1398 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 49,400 psi | 79% | 2448 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 44,251 psi | 71% | 2385 fps | 95.2% |
| ReloadSwiss RS 52 | 48.6 gr | 80% | 39,813 psi | 64% | 2398 fps | 97.3% |
| ReloadSwiss RS 60 | 49.3 gr | 80% | 33,054 psi | 53% | 2283 fps | 98.5% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 37,173 psi | 60% | 2359 fps | 95.2% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 40,030 psi | 64% | 2411 fps | 95% |
| Rottweil R 901 | <<locked>> | 80% | 46,644 psi | 75% | 2375 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 40,364 psi | 65% | 2293 fps | 98.9% |
| Rottweil R 903 | <<locked>> | 80% | 33,837 psi | 54% | 2218 fps | 96.9% |
| Rottweil R 907 | <<locked>> | 94% | 49,139 psi | 79% | 2454 fps | 95% |
| Shooters World Long Rifle | <<locked>> | 90% | 42,438 psi | 68% | 2352 fps | 95.6% |
| Shooters World Match Rifle | <<locked>> | 80% | 41,829 psi | 67% | 2359 fps | 99.9% |
| Shooters World Precision | <<locked>> | 80% | 38,319 psi | 61% | 2274 fps | 98.6% |
| Shooters World SW4350 | <<locked>> | 94% | 45,252 psi | 73% | 2421 fps | 95.1% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 52,272 psi | 84% | 2464 fps | 99.9% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 34,403 psi | 55% | 2257 fps | 96% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 52,388 psi | 84% | 2444 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 42,670 psi | 68% | 2356 fps | 96.5% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 41,075 psi | 66% | 2343 fps | 98% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 43,424 psi | 70% | 2290 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 36,129 psi | 58% | 2175 fps | 99.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 47,108 psi | 76% | 2392 fps | 95.3% |
| Somchem S321 | <<locked>> | 80% | 47,805 psi | 77% | 2448 fps | 99.8% |
| Somchem S335 | <<locked>> | 80% | 43,105 psi | 69% | 2297 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 42,119 psi | 68% | 2352 fps | 98.1% |
| Somchem S355 | <<locked>> | 80% | 34,679 psi | 56% | 2224 fps | 96.9% |
| Somchem S365 | <<locked>> | 84% | 28,732 psi | 46% | 2165 fps | 95.8% |
| Vihtavuori N130 | <<locked>> | 80% | 48,776 psi | 78% | 2346 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 43,482 psi | 70% | 2287 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 39,407 psi | 63% | 2280 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 39,755 psi | 64% | 2283 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 32,851 psi | 53% | 2169 fps | 97.7% |
| Vihtavuori N160 | <<locked>> | 88% | 37,101 psi | 59% | 2297 fps | 95.4% |
| Vihtavuori N530 | <<locked>> | 80% | 44,425 psi | 71% | 2372 fps | 99.5% |
| Vihtavuori N540 | <<locked>> | 80% | 38,319 psi | 61% | 2274 fps | 99.8% |
| Vihtavuori N550 | <<locked>> | 88% | 36,434 psi | 58% | 2300 fps | 95% |
| Vihtavuori N555 | <<locked>> | 96% | 34,751 psi | 56% | 2336 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 31,256 psi | 50% | 2142 fps | 95.3% |
| Winchester 748 | <<locked>> | 80% | 43,584 psi | 70% | 2411 fps | 99.8% |
| Winchester 760 | <<locked>> | 94% | 45,513 psi | 73% | 2487 fps | 95% |
| Winchester StaBALL Match | <<locked>> | 80% | 40,292 psi | 65% | 2346 fps | 98.4% |
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 115 powders for 8.5 x 55 Blaser loaded with the .338 | 225gr | Barnes XLC S. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,700 fps; across all powders the maximum-charge window runs from 1,526 fps to 2,700 fps. Accurate 3100 gives the best case fill at 100 %, and 115 of the 115 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 225.0 gr projectile in 0.338" calls for a 1:14.0 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. 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 | 225gr | Barnes XLC S they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 3100, ADI AR 2209, Alliant Reloder-19 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.