Load Specifications
Bullet Manufacturer:Impala Bullets
Bullet Weight:210 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:1:15.0
Load data in caliber 8.5 x 55 Blaser with .338 | 210gr | Impala RNFP KO bullet and 99 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, ReloadSwiss RS 60 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% | 53,998 psi | 87% | 2552 fps | 100% |
| Accurate 2460 | <<locked>> | 84% | 55,898 psi | 90% | 2618 fps | 100% |
| Accurate 2495 | <<locked>> | 92% | 55,927 psi | 90% | 2621 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 53,679 psi | 86% | 2628 fps | 100% |
| Accurate 4064 | <<locked>> | 94% | 55,172 psi | 88% | 2657 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 49,893 psi | 80% | 2657 fps | 98.1% |
| Accurate LT-30 | <<locked>> | 82% | 55,695 psi | 89% | 2530 fps | 100% |
| Accurate LT-32 | <<locked>> | 82% | 56,101 psi | 90% | 2552 fps | 100% |
| ADI AR 2206H | <<locked>> | 90% | 55,753 psi | 89% | 2677 fps | 99.6% |
| ADI AR 2208 | <<locked>> | 96% | 56,217 psi | 90% | 2667 fps | 99.3% |
| ADI Benchmark 8208 | <<locked>> | 88% | 54,940 psi | 88% | 2635 fps | 99.9% |
| Alliant AR-Comp | <<locked>> | 88% | 54,839 psi | 88% | 2615 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 84% | 56,434 psi | 90% | 2730 fps | 99.9% |
| Alliant Power Pro 2000-MR | <<locked>> | 92% | 54,592 psi | 88% | 2776 fps | 99.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 96% | 55,796 psi | 89% | 2690 fps | 99.9% |
| Alliant Reloder-10x | <<locked>> | 82% | 53,519 psi | 86% | 2552 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 92% | 53,505 psi | 86% | 2667 fps | 99.2% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 48,704 psi | 78% | 2654 fps | 98.1% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 56,217 psi | 90% | 2799 fps | 99.9% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 35,447 psi | 57% | 2411 fps | 95.8% |
| Baschieri & Pellagri 106 | <<locked>> | 82% | 54,868 psi | 88% | 2530 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 90% | 54,940 psi | 88% | 2687 fps | 98.9% |
| Bofors RP3 | <<locked>> | 94% | 53,287 psi | 85% | 2664 fps | 99.8% |
| Hodgdon Benchmark | <<locked>> | 86% | 53,766 psi | 86% | 2575 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 88% | 53,737 psi | 86% | 2664 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 86% | 54,998 psi | 88% | 2746 fps | 99.4% |
| Hodgdon H322 | <<locked>> | 84% | 55,434 psi | 89% | 2631 fps | 100% |
| Hodgdon H335 | <<locked>> | 82% | 52,968 psi | 85% | 2612 fps | 100% |
| Hodgdon H380 | <<locked>> | 94% | 54,375 psi | 87% | 2667 fps | 98.3% |
| Hodgdon H414ᴾ | <<locked>> | 100% | 52,765 psi | 85% | 2697 fps | 96% |
| Hodgdon H4895 | <<locked>> | 90% | 56,260 psi | 90% | 2687 fps | 99.8% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 45,034 psi | 72% | 2546 fps | 98.7% |
| Hodgdon LEVERevolution | <<locked>> | 92% | 54,650 psi | 88% | 2713 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,491 psi | 57% | 1591 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 53,882 psi | 86% | 2638 fps | 99.7% |
| IMR 3031 | <<locked>> | 90% | 55,434 psi | 89% | 2674 fps | 100% |
| IMR 4064 | <<locked>> | 94% | 55,796 psi | 89% | 2651 fps | 99.4% |
| IMR 4166 Enduron | <<locked>> | 92% | 56,376 psi | 90% | 2628 fps | 96.5% |
| IMR 4198 | <<locked>> | 84% | 56,391 psi | 90% | 2549 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 98% | 55,434 psi | 89% | 2648 fps | 96.3% |
| IMR 4831ᴾ | <<locked>> | 100% | 47,413 psi | 76% | 2602 fps | 97.8% |
| IMR 4895 | <<locked>> | 92% | 54,795 psi | 88% | 2697 fps | 99.6% |
| IMR 8208 XBR | <<locked>> | 88% | 54,940 psi | 88% | 2635 fps | 99.9% |
| Lovex D073.5 | <<locked>> | 84% | 55,535 psi | 89% | 2625 fps | 100% |
| Lovex D073.6 | <<locked>> | 90% | 55,187 psi | 88% | 2657 fps | 100% |
| Lovex S060 | <<locked>> | 90% | 55,579 psi | 89% | 2605 fps | 99.6% |
| Lovex S062 | <<locked>> | 94% | 55,680 psi | 89% | 2654 fps | 100% |
| Lovex S065ᴾ | <<locked>> | 100% | 54,752 psi | 88% | 2644 fps | 97.6% |
| Lovex S070ᴾ | <<locked>> | 100% | 52,286 psi | 84% | 2628 fps | 96% |
| Norma 201 | <<locked>> | 90% | 55,027 psi | 88% | 2631 fps | 99.9% |
| Norma 202 | <<locked>> | 90% | 54,940 psi | 88% | 2635 fps | 100% |
| Norma 203B | <<locked>> | 94% | 55,956 psi | 90% | 2703 fps | 99.7% |
| Norma URPᴾ | <<locked>> | 100% | 49,342 psi | 79% | 2648 fps | 98% |
| Ramshot Big Game | <<locked>> | 94% | 56,014 psi | 90% | 2723 fps | 99.6% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 48,544 psi | 78% | 2635 fps | 95.9% |
| Ramshot TAC | <<locked>> | 88% | 55,158 psi | 88% | 2644 fps | 97.9% |
| Ramshot Wild Boar | <<locked>> | 88% | 54,375 psi | 87% | 2664 fps | 99.5% |
| Ramshot X-Terminator | <<locked>> | 86% | 56,159 psi | 90% | 2638 fps | 99.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,752 psi | 57% | 1627 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 54,447 psi | 87% | 2618 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 94% | 54,926 psi | 88% | 2648 fps | 96.9% |
| ReloadSwiss RS 52 | <<locked>> | 90% | 52,881 psi | 85% | 2720 fps | 99.1% |
| ReloadSwiss RS 60 | <<locked>> | 98% | 55,985 psi | 90% | 2802 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 49,240 psi | 79% | 2674 fps | 97.8% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 49,821 psi | 80% | 2684 fps | 97.1% |
| Rottweil R 901 | <<locked>> | 86% | 53,722 psi | 86% | 2582 fps | 100% |
| Rottweil R 902 | <<locked>> | 92% | 55,361 psi | 89% | 2628 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 96% | 53,171 psi | 85% | 2654 fps | 99.7% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 54,752 psi | 88% | 2644 fps | 97.6% |
| Shooters World Match Rifle | <<locked>> | 90% | 55,187 psi | 88% | 2657 fps | 100% |
| Shooters World Precision | <<locked>> | 94% | 55,680 psi | 89% | 2654 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 52,286 psi | 84% | 2628 fps | 96% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 54,346 psi | 87% | 2589 fps | 99.8% |
| SNPE Vectan SP 11 | <<locked>> | 96% | 54,114 psi | 87% | 2703 fps | 99.5% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 53,867 psi | 86% | 2566 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 88% | 53,548 psi | 86% | 2621 fps | 98.1% |
| SNPE Vectan SP 9 | <<locked>> | 90% | 53,766 psi | 86% | 2648 fps | 99.4% |
| SNPE Vectan Tubal 3000 | <<locked>> | 90% | 56,434 psi | 90% | 2572 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 96% | 55,811 psi | 89% | 2569 fps | 100% |
| SNPE Vectan Tubal 7000ᴾ | <<locked>> | 100% | 54,984 psi | 88% | 2595 fps | 96.2% |
| Somchem S321 | <<locked>> | 86% | 56,144 psi | 90% | 2667 fps | 100% |
| Somchem S335 | <<locked>> | 90% | 55,825 psi | 90% | 2575 fps | 100% |
| Somchem S341 | <<locked>> | 90% | 56,246 psi | 90% | 2667 fps | 99.6% |
| Somchem S355 | <<locked>> | 96% | 53,476 psi | 86% | 2648 fps | 99.6% |
| Somchem S365ᴾ | <<locked>> | 100% | 44,338 psi | 71% | 2605 fps | 99.6% |
| Vihtavuori N130 | <<locked>> | 86% | 56,289 psi | 90% | 2543 fps | 100% |
| Vihtavuori N133 | <<locked>> | 90% | 56,202 psi | 90% | 2559 fps | 100% |
| Vihtavuori N135 | <<locked>> | 92% | 54,360 psi | 87% | 2598 fps | 100% |
| Vihtavuori N140 | <<locked>> | 92% | 55,245 psi | 89% | 2612 fps | 100% |
| Vihtavuori N150 | <<locked>> | 98% | 54,824 psi | 88% | 2631 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 51,648 psi | 83% | 2641 fps | 98.2% |
| Vihtavuori N530 | <<locked>> | 88% | 55,259 psi | 89% | 2631 fps | 100% |
| Vihtavuori N540 | <<locked>> | 92% | 53,461 psi | 86% | 2612 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 50,836 psi | 82% | 2651 fps | 98% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 37,652 psi | 60% | 2487 fps | 95.9% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 52,547 psi | 84% | 2628 fps | 99.6% |
| Winchester 748 | <<locked>> | 88% | 54,433 psi | 87% | 2674 fps | 100% |
| Winchester 760ᴾ | <<locked>> | 100% | 52,765 psi | 85% | 2697 fps | 96% |
| Winchester StaBALL Match | <<locked>> | 90% | 53,476 psi | 86% | 2654 fps | 99.7% |
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% | 45,310 psi | 73% | 2428 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 49,110 psi | 79% | 2526 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 39,160 psi | 63% | 2369 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 44,396 psi | 71% | 2490 fps | 99.9% |
| Accurate 4064 | <<locked>> | 80% | 36,898 psi | 59% | 2356 fps | 99.6% |
| Accurate 4350 | <<locked>> | 92% | 38,696 psi | 62% | 2461 fps | 95.5% |
| Accurate LT-30 | <<locked>> | 80% | 52,504 psi | 84% | 2487 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 52,823 psi | 85% | 2507 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 41,437 psi | 66% | 2438 fps | 97.6% |
| ADI AR 2208 | <<locked>> | 80% | 35,462 psi | 57% | 2300 fps | 95% |
| ADI Benchmark 8208 | <<locked>> | 80% | 43,192 psi | 69% | 2448 fps | 98.9% |
| Alliant AR-Comp | <<locked>> | 80% | 42,670 psi | 68% | 2448 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 49,908 psi | 80% | 2631 fps | 99.4% |
| Alliant Power Pro 2000-MR | 51.5 gr | 80% | 37,405 psi | 60% | 2444 fps | 95.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 34,882 psi | 56% | 2323 fps | 96.8% |
| Alliant Reloder-10x | <<locked>> | 80% | 50,676 psi | 81% | 2513 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 37,434 psi | 60% | 2375 fps | 95.9% |
| Alliant Reloder-16 | <<locked>> | 92% | 38,841 psi | 62% | 2457 fps | 95.4% |
| Alliant Reloder-17 | <<locked>> | 84% | 34,200 psi | 55% | 2382 fps | 95.6% |
| Alliant Reloder-23 | <<locked>> | 98% | 33,547 psi | 54% | 2365 fps | 95% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 51,648 psi | 83% | 2490 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 40,103 psi | 64% | 2434 fps | 96.1% |
| Bofors RP3 | <<locked>> | 80% | 34,780 psi | 56% | 2333 fps | 96.9% |
| Hodgdon Benchmark | <<locked>> | 80% | 45,223 psi | 73% | 2441 fps | 99.5% |
| Hodgdon BL-C2 | <<locked>> | 80% | 41,829 psi | 67% | 2470 fps | 99.1% |
| Hodgdon CFE223 | <<locked>> | 80% | 45,237 psi | 73% | 2585 fps | 98% |
| Hodgdon H322 | <<locked>> | 80% | 49,081 psi | 79% | 2543 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 49,661 psi | 80% | 2562 fps | 100% |
| Hodgdon H380 | <<locked>> | 84% | 40,001 psi | 64% | 2421 fps | 95.2% |
| Hodgdon H414 | <<locked>> | 98% | 49,443 psi | 79% | 2644 fps | 95.2% |
| Hodgdon H4895 | <<locked>> | 80% | 41,713 psi | 67% | 2448 fps | 98.1% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 33,866 psi | 54% | 2320 fps | 95.6% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 37,565 psi | 60% | 2418 fps | 97.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,542 psi | 43% | 1421 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 40,074 psi | 64% | 2405 fps | 97.7% |
| IMR 3031 | <<locked>> | 80% | 40,857 psi | 66% | 2454 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 37,144 psi | 60% | 2329 fps | 95.9% |
| IMR 4166 Enduron | <<locked>> | 88% | 50,198 psi | 80% | 2536 fps | 95.2% |
| IMR 4198 | <<locked>> | 80% | 50,343 psi | 81% | 2470 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 96% | 52,286 psi | 84% | 2602 fps | 95.6% |
| IMR 4831 | <<locked>> | 92% | 37,260 psi | 60% | 2415 fps | 95.1% |
| IMR 4895 | <<locked>> | 80% | 38,218 psi | 61% | 2405 fps | 96.9% |
| IMR 8208 XBR | <<locked>> | 80% | 43,192 psi | 69% | 2448 fps | 98.9% |
| Lovex D073.5 | <<locked>> | 80% | 48,907 psi | 78% | 2530 fps | 99.9% |
| Lovex D073.6 | <<locked>> | 80% | 40,466 psi | 65% | 2428 fps | 99.5% |
| Lovex S060 | <<locked>> | 80% | 41,771 psi | 67% | 2382 fps | 97.7% |
| Lovex S062 | <<locked>> | 80% | 37,304 psi | 60% | 2343 fps | 97.9% |
| Lovex S065 | <<locked>> | 92% | 43,642 psi | 70% | 2464 fps | 95.2% |
| Lovex S070 | <<locked>> | 98% | 49,313 psi | 79% | 2582 fps | 95.4% |
| Norma 201 | <<locked>> | 80% | 41,220 psi | 66% | 2405 fps | 98.6% |
| Norma 202 | <<locked>> | 80% | 40,799 psi | 65% | 2411 fps | 99.8% |
| Norma 203B | <<locked>> | 80% | 36,840 psi | 59% | 2369 fps | 96.4% |
| Norma URP | <<locked>> | 92% | 38,870 psi | 62% | 2454 fps | 95.3% |
| Ramshot Big Game | <<locked>> | 80% | 36,100 psi | 58% | 2372 fps | 95.8% |
| Ramshot Hunter | <<locked>> | 98% | 45,513 psi | 73% | 2582 fps | 95.1% |
| Ramshot TAC | <<locked>> | 80% | 43,163 psi | 69% | 2444 fps | 95.3% |
| Ramshot Wild Boar | <<locked>> | 80% | 42,221 psi | 68% | 2464 fps | 97.7% |
| Ramshot X-Terminator | <<locked>> | 80% | 46,673 psi | 75% | 2490 fps | 98.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,847 psi | 43% | 1453 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 48,298 psi | 77% | 2526 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 48,588 psi | 78% | 2549 fps | 95.6% |
| ReloadSwiss RS 52 | 49.9 gr | 80% | 38,450 psi | 62% | 2464 fps | 96.2% |
| ReloadSwiss RS 60 | 50.7 gr | 80% | 32,213 psi | 52% | 2343 fps | 97.4% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 40,756 psi | 65% | 2520 fps | 95.6% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 44,063 psi | 71% | 2579 fps | 95.5% |
| Rottweil R 901 | <<locked>> | 80% | 45,324 psi | 73% | 2451 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 39,349 psi | 63% | 2362 fps | 98.3% |
| Rottweil R 903 | <<locked>> | 80% | 32,808 psi | 53% | 2280 fps | 95.8% |
| Shooters World Long Rifle | <<locked>> | 92% | 43,642 psi | 70% | 2464 fps | 95.2% |
| Shooters World Match Rifle | <<locked>> | 80% | 40,466 psi | 65% | 2428 fps | 99.5% |
| Shooters World Precision | <<locked>> | 80% | 37,304 psi | 60% | 2343 fps | 97.9% |
| Shooters World SW4350 | <<locked>> | 98% | 49,313 psi | 79% | 2582 fps | 95.4% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 50,894 psi | 82% | 2539 fps | 99.6% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 35,288 psi | 57% | 2362 fps | 95.6% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 50,923 psi | 82% | 2526 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 41,481 psi | 67% | 2421 fps | 95.5% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 39,813 psi | 64% | 2408 fps | 97.1% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 42,293 psi | 68% | 2362 fps | 99.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 35,070 psi | 56% | 2241 fps | 99.7% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 51,692 psi | 83% | 2549 fps | 95.6% |
| Somchem S321 | <<locked>> | 80% | 46,499 psi | 75% | 2523 fps | 99.5% |
| Somchem S335 | <<locked>> | 80% | 42,047 psi | 67% | 2369 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 40,901 psi | 66% | 2421 fps | 97.3% |
| Somchem S355 | <<locked>> | 80% | 33,707 psi | 54% | 2287 fps | 95.9% |
| Somchem S365 | <<locked>> | 86% | 29,559 psi | 47% | 2267 fps | 95.3% |
| Vihtavuori N130 | <<locked>> | 80% | 47,514 psi | 76% | 2425 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 42,279 psi | 68% | 2362 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 38,116 psi | 61% | 2352 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 38,667 psi | 62% | 2352 fps | 99.8% |
| Vihtavuori N150 | <<locked>> | 80% | 31,894 psi | 51% | 2231 fps | 96.8% |
| Vihtavuori N160 | <<locked>> | 90% | 38,348 psi | 61% | 2408 fps | 95% |
| Vihtavuori N530 | <<locked>> | 80% | 43,439 psi | 70% | 2448 fps | 99% |
| Vihtavuori N540 | <<locked>> | 80% | 37,391 psi | 60% | 2346 fps | 99.4% |
| Vihtavuori N550 | <<locked>> | 92% | 39,914 psi | 64% | 2457 fps | 95.4% |
| Vihtavuori N555 | <<locked>> | 98% | 35,505 psi | 57% | 2438 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 34,171 psi | 55% | 2290 fps | 95.7% |
| Winchester 748 | <<locked>> | 80% | 42,380 psi | 68% | 2487 fps | 99.4% |
| Winchester 760 | <<locked>> | 98% | 49,719 psi | 80% | 2648 fps | 95.3% |
| Winchester StaBALL Match | <<locked>> | 80% | 39,160 psi | 63% | 2415 fps | 97.6% |
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 99 powders for 8.5 x 55 Blaser loaded with the .338 | 210gr | Impala RNFP KO. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,802 fps; across all powders the maximum-charge window runs from 1,591 fps to 2,802 fps. Accurate 4350 gives the best case fill at 100 %, and 99 of the 99 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (430 MPa), the top charges use 57–90 %, leaving at least 10 % headroom. The 210.0 gr projectile in 0.338" calls for a 1:15.0 twist; slower twists will usually not stabilise this weight. Accurate 4350, Alliant Reloder-16, Alliant Reloder-17 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, ReloadSwiss RS 60, ReloadSwiss RS 52 rank at the top here: for 8.5 x 55 Blaser with the .338 | 210gr | Impala RNFP KO 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.