Load Specifications
Load data in caliber 8.5 x 55 Blaser with .338 | 200gr | CutEdge ESP Raptor bullet and 98 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 52 and Hodgdon CFE223.
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>> | 90% | 53,519 psi | 86% | 2641 fps | 100% |
| Accurate 2200 | <<locked>> | 82% | 54,157 psi | 87% | 2730 fps | 98.7% |
| Accurate 2230 | <<locked>> | 82% | 54,752 psi | 88% | 2740 fps | 99% |
| Accurate 2460 | <<locked>> | 88% | 55,434 psi | 89% | 2710 fps | 100% |
| Accurate 2495 | <<locked>> | 96% | 53,258 psi | 85% | 2690 fps | 100% |
| Accurate 2520 | <<locked>> | 90% | 53,229 psi | 85% | 2717 fps | 100% |
| Accurate 4064 | <<locked>> | 98% | 52,997 psi | 85% | 2726 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 42,018 psi | 67% | 2615 fps | 96% |
| Accurate LT-30 | <<locked>> | 84% | 53,998 psi | 87% | 2595 fps | 100% |
| Accurate LT-32 | <<locked>> | 84% | 54,447 psi | 87% | 2615 fps | 100% |
| ADI AR 2206H | <<locked>> | 94% | 56,086 psi | 90% | 2769 fps | 99.4% |
| ADI AR 2207 | <<locked>> | 82% | 55,521 psi | 89% | 2612 fps | 100% |
| ADI AR 2208 | <<locked>> | 98% | 53,693 psi | 86% | 2717 fps | 98.7% |
| ADI AR 2219 | <<locked>> | 84% | 54,346 psi | 87% | 2707 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 92% | 55,550 psi | 89% | 2733 fps | 99.9% |
| Alliant AR-Comp | <<locked>> | 92% | 55,056 psi | 88% | 2717 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 86% | 53,287 psi | 85% | 2779 fps | 99.5% |
| Alliant Power Pro 2000-MR | <<locked>> | 96% | 55,680 psi | 89% | 2874 fps | 99% |
| Alliant Reloder- TS 15.5ᴾ | <<locked>> | 100% | 56,057 psi | 90% | 2782 fps | 99.8% |
| Alliant Reloder-10x | <<locked>> | 86% | 53,650 psi | 86% | 2651 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 96% | 53,432 psi | 86% | 2753 fps | 98.9% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 43,221 psi | 69% | 2631 fps | 96.2% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 49,617 psi | 80% | 2782 fps | 99.1% |
| Alliant Reloder-7 | <<locked>> | 82% | 56,376 psi | 90% | 2631 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 84% | 53,055 psi | 85% | 2592 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 94% | 55,854 psi | 90% | 2782 fps | 98.7% |
| Bofors RP3ᴾ | <<locked>> | 100% | 56,289 psi | 90% | 2795 fps | 99.8% |
| Hodgdon Benchmark | <<locked>> | 90% | 54,404 psi | 87% | 2671 fps | 99.9% |
| Hodgdon BL-C2 | <<locked>> | 92% | 53,983 psi | 87% | 2756 fps | 99.9% |
| Hodgdon CFE223 | <<locked>> | 90% | 56,144 psi | 90% | 2851 fps | 99.2% |
| Hodgdon H322 | <<locked>> | 88% | 56,434 psi | 90% | 2736 fps | 100% |
| Hodgdon H335 | <<locked>> | 86% | 53,853 psi | 86% | 2713 fps | 100% |
| Hodgdon H380 | <<locked>> | 98% | 54,476 psi | 87% | 2753 fps | 98% |
| Hodgdon H4198 | <<locked>> | 82% | 56,202 psi | 90% | 2641 fps | 100% |
| Hodgdon H4895 | <<locked>> | 92% | 53,098 psi | 85% | 2733 fps | 99.5% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 39,247 psi | 63% | 2523 fps | 96.9% |
| Hodgdon LEVERevolution | <<locked>> | 96% | 55,071 psi | 88% | 2808 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,272 psi | 55% | 1627 fps | 100% |
| Hodgdon VARGET | <<locked>> | 94% | 54,694 psi | 88% | 2736 fps | 99.5% |
| IMR 3031 | <<locked>> | 94% | 55,608 psi | 89% | 2769 fps | 100% |
| IMR 4064 | <<locked>> | 96% | 53,098 psi | 85% | 2700 fps | 98.8% |
| IMR 4198 | <<locked>> | 86% | 54,273 psi | 87% | 2615 fps | 100% |
| IMR 4895 | <<locked>> | 96% | 54,766 psi | 88% | 2785 fps | 99.4% |
| IMR 8208 XBR | <<locked>> | 92% | 55,550 psi | 89% | 2733 fps | 99.9% |
| Lovex D073.4 | <<locked>> | 82% | 55,550 psi | 89% | 2720 fps | 100% |
| Lovex D073.5 | <<locked>> | 88% | 55,434 psi | 89% | 2720 fps | 100% |
| Lovex D073.6 | <<locked>> | 94% | 54,737 psi | 88% | 2749 fps | 100% |
| Lovex S060 | <<locked>> | 94% | 56,420 psi | 90% | 2703 fps | 99.4% |
| Lovex S062 | <<locked>> | 98% | 55,535 psi | 89% | 2743 fps | 99.9% |
| Lovex S065ᴾ | <<locked>> | 100% | 48,066 psi | 77% | 2625 fps | 95.8% |
| Norma 200 | <<locked>> | 82% | 53,243 psi | 85% | 2621 fps | 100% |
| Norma 201 | <<locked>> | 94% | 54,665 psi | 88% | 2720 fps | 99.8% |
| Norma 202 | <<locked>> | 94% | 55,114 psi | 88% | 2730 fps | 100% |
| Norma 203B | <<locked>> | 98% | 55,956 psi | 90% | 2792 fps | 99.5% |
| Norma URPᴾ | <<locked>> | 100% | 42,902 psi | 69% | 2621 fps | 96% |
| Ramshot Big Game | <<locked>> | 96% | 52,968 psi | 85% | 2766 fps | 99% |
| Ramshot TAC | <<locked>> | 90% | 52,620 psi | 84% | 2687 fps | 97% |
| Ramshot Wild Boar | <<locked>> | 92% | 55,143 psi | 88% | 2762 fps | 99.3% |
| Ramshot X-Terminator | <<locked>> | 88% | 53,664 psi | 86% | 2687 fps | 99% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,490 psi | 55% | 1667 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 88% | 55,419 psi | 89% | 2720 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 98% | 55,317 psi | 89% | 2736 fps | 96.5% |
| ReloadSwiss RS 52 | <<locked>> | 94% | 53,301 psi | 85% | 2818 fps | 98.9% |
| ReloadSwiss RS 60ᴾ | <<locked>> | 100% | 53,098 psi | 85% | 2848 fps | 100% |
| Rottweil R 901 | <<locked>> | 92% | 55,477 psi | 89% | 2707 fps | 100% |
| Rottweil R 902 | <<locked>> | 96% | 54,795 psi | 88% | 2713 fps | 99.8% |
| Rottweil R 903ᴾ | <<locked>> | 100% | 52,214 psi | 84% | 2733 fps | 99.5% |
| Shooters World AR Plus | <<locked>> | 82% | 55,550 psi | 89% | 2720 fps | 100% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 48,066 psi | 77% | 2625 fps | 95.8% |
| Shooters World Match Rifle | <<locked>> | 94% | 54,737 psi | 88% | 2749 fps | 100% |
| Shooters World Precision | <<locked>> | 98% | 55,535 psi | 89% | 2743 fps | 99.9% |
| Shooters World Tactical Rifle | <<locked>> | 86% | 55,390 psi | 89% | 2690 fps | 99.7% |
| SNPE Vectan BA6 1/2 | <<locked>> | 82% | 54,853 psi | 88% | 2365 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 84% | 54,578 psi | 88% | 2717 fps | 100% |
| SNPE Vectan SP 11ᴾ | <<locked>> | 100% | 54,433 psi | 87% | 2795 fps | 99.3% |
| SNPE Vectan SP 3 | <<locked>> | 86% | 54,781 psi | 88% | 2671 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 92% | 54,157 psi | 87% | 2717 fps | 97.8% |
| SNPE Vectan SP 9 | <<locked>> | 94% | 54,607 psi | 88% | 2746 fps | 99.3% |
| SNPE Vectan Tubal 3000 | <<locked>> | 92% | 53,693 psi | 86% | 2625 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 98% | 53,200 psi | 85% | 2621 fps | 100% |
| Somchem S321 | <<locked>> | 88% | 53,113 psi | 85% | 2717 fps | 99.8% |
| Somchem S335 | <<locked>> | 94% | 56,028 psi | 90% | 2671 fps | 100% |
| Somchem S341 | <<locked>> | 92% | 53,432 psi | 86% | 2710 fps | 99.1% |
| Somchem S355ᴾ | <<locked>> | 100% | 52,968 psi | 85% | 2733 fps | 99.4% |
| Somchem S365ᴾ | <<locked>> | 100% | 37,927 psi | 61% | 2562 fps | 98% |
| Vihtavuori N120 | <<locked>> | 82% | 55,419 psi | 89% | 2562 fps | 100% |
| Vihtavuori N130 | <<locked>> | 88% | 53,563 psi | 86% | 2598 fps | 100% |
| Vihtavuori N133 | <<locked>> | 92% | 53,563 psi | 86% | 2615 fps | 100% |
| Vihtavuori N135 | <<locked>> | 96% | 53,693 psi | 86% | 2687 fps | 100% |
| Vihtavuori N140 | <<locked>> | 96% | 55,637 psi | 89% | 2707 fps | 100% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 51,372 psi | 82% | 2671 fps | 99.8% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 45,208 psi | 72% | 2621 fps | 96.5% |
| Vihtavuori N530 | <<locked>> | 92% | 56,246 psi | 90% | 2733 fps | 99.9% |
| Vihtavuori N540 | <<locked>> | 96% | 53,780 psi | 86% | 2703 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 44,237 psi | 71% | 2625 fps | 96.1% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 46,818 psi | 75% | 2618 fps | 98.6% |
| Winchester 748 | <<locked>> | 92% | 55,201 psi | 89% | 2776 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 94% | 54,041 psi | 87% | 2749 fps | 99.5% |
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% | 39,044 psi | 63% | 2418 fps | 100% |
| Accurate 2200 | <<locked>> | 80% | 50,459 psi | 81% | 2674 fps | 98.1% |
| Accurate 2230 | <<locked>> | 80% | 50,995 psi | 82% | 2684 fps | 98.5% |
| Accurate 2460 | <<locked>> | 80% | 42,177 psi | 68% | 2510 fps | 99.7% |
| Accurate 2495 | <<locked>> | 80% | 30,951 psi | 50% | 2313 fps | 99.7% |
| Accurate 2520 | <<locked>> | 80% | 37,463 psi | 60% | 2457 fps | 98.9% |
| Accurate 4064 | <<locked>> | 80% | 29,356 psi | 47% | 2293 fps | 97.7% |
| Accurate 4350 | <<locked>> | 98% | 39,131 psi | 63% | 2559 fps | 95.1% |
| Accurate LT-30 | <<locked>> | 80% | 47,863 psi | 77% | 2507 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 48,225 psi | 77% | 2526 fps | 99.9% |
| ADI AR 2206H | <<locked>> | 80% | 35,868 psi | 58% | 2411 fps | 95.5% |
| ADI AR 2207 | <<locked>> | 80% | 52,040 psi | 83% | 2569 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 39,378 psi | 63% | 2470 fps | 95.7% |
| ADI AR 2219 | <<locked>> | 80% | 47,398 psi | 76% | 2608 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 80% | 37,927 psi | 61% | 2431 fps | 97.4% |
| Alliant AR-Comp | <<locked>> | 80% | 36,506 psi | 59% | 2441 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 43,729 psi | 70% | 2618 fps | 98.3% |
| Alliant Power Pro 2000-MR | 55.6 gr | 86% | 39,508 psi | 63% | 2575 fps | 95.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 33,446 psi | 54% | 2385 fps | 95.8% |
| Alliant Reloder-10x | <<locked>> | 80% | 44,367 psi | 71% | 2516 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 36,260 psi | 58% | 2441 fps | 95% |
| Alliant Reloder-16 | <<locked>> | 98% | 40,582 psi | 65% | 2579 fps | 95.3% |
| Alliant Reloder-17 | <<locked>> | 90% | 35,389 psi | 57% | 2493 fps | 95.4% |
| Alliant Reloder-7 | <<locked>> | 80% | 52,953 psi | 85% | 2585 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 46,644 psi | 75% | 2500 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 39,856 psi | 64% | 2513 fps | 95.4% |
| Bofors RP3 | <<locked>> | 84% | 32,576 psi | 52% | 2379 fps | 95.6% |
| Hodgdon Benchmark | <<locked>> | 80% | 40,161 psi | 64% | 2438 fps | 98.5% |
| Hodgdon BL-C2 | <<locked>> | 80% | 35,766 psi | 57% | 2441 fps | 97.5% |
| Hodgdon CFE223 | 53 gr | 80% | 39,436 psi | 63% | 2559 fps | 96% |
| Hodgdon H322 | <<locked>> | 80% | 43,178 psi | 69% | 2539 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 43,816 psi | 70% | 2559 fps | 99.9% |
| Hodgdon H380 | <<locked>> | 90% | 41,742 psi | 67% | 2543 fps | 95.2% |
| Hodgdon H4198 | <<locked>> | 80% | 52,736 psi | 85% | 2595 fps | 100% |
| Hodgdon H4895 | <<locked>> | 80% | 36,071 psi | 58% | 2425 fps | 96.2% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 34,505 psi | 55% | 2418 fps | 95.2% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 32,227 psi | 52% | 2382 fps | 95.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,353 psi | 41% | 1453 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 34,824 psi | 56% | 2382 fps | 95.7% |
| IMR 3031 | <<locked>> | 80% | 34,896 psi | 56% | 2438 fps | 99.8% |
| IMR 4064 | <<locked>> | 84% | 36,347 psi | 58% | 2402 fps | 95% |
| IMR 4198 | <<locked>> | 80% | 45,571 psi | 73% | 2490 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 34,737 psi | 56% | 2421 fps | 95.2% |
| IMR 8208 XBR | <<locked>> | 80% | 37,927 psi | 61% | 2431 fps | 97.4% |
| Lovex D073.4 | <<locked>> | 80% | 51,706 psi | 83% | 2667 fps | 100% |
| Lovex D073.5 | <<locked>> | 80% | 41,945 psi | 67% | 2510 fps | 99% |
| Lovex D073.6 | <<locked>> | 80% | 33,837 psi | 54% | 2392 fps | 98% |
| Lovex S060 | <<locked>> | 80% | 36,956 psi | 59% | 2369 fps | 95.8% |
| Lovex S062 | <<locked>> | 80% | 31,517 psi | 51% | 2306 fps | 95.5% |
| Lovex S065 | <<locked>> | 98% | 45,150 psi | 72% | 2575 fps | 95.1% |
| Norma 200 | <<locked>> | 80% | 49,937 psi | 80% | 2575 fps | 100% |
| Norma 201 | <<locked>> | 80% | 34,925 psi | 56% | 2372 fps | 96.7% |
| Norma 202 | <<locked>> | 80% | 35,085 psi | 56% | 2392 fps | 98.8% |
| Norma 203B | <<locked>> | 84% | 35,592 psi | 57% | 2431 fps | 95.4% |
| Norma URP | <<locked>> | 98% | 40,190 psi | 64% | 2566 fps | 95.2% |
| Ramshot Big Game | <<locked>> | 86% | 37,652 psi | 60% | 2493 fps | 95.8% |
| Ramshot TAC | <<locked>> | 86% | 46,122 psi | 74% | 2582 fps | 95.5% |
| Ramshot Wild Boar | <<locked>> | 80% | 36,709 psi | 59% | 2441 fps | 95.7% |
| Ramshot X-Terminator | <<locked>> | 80% | 41,249 psi | 66% | 2480 fps | 96.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,440 psi | 41% | 1486 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 42,554 psi | 68% | 2520 fps | 99.4% |
| ReloadSwiss RS 50 | <<locked>> | 94% | 48,544 psi | 78% | 2631 fps | 95% |
| ReloadSwiss RS 52 | 52.7 gr | 84% | 37,565 psi | 60% | 2533 fps | 95.4% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 29,022 psi | 47% | 2333 fps | 95.1% |
| Rottweil R 901 | <<locked>> | 80% | 38,580 psi | 62% | 2428 fps | 99.2% |
| Rottweil R 902 | <<locked>> | 80% | 33,156 psi | 53% | 2323 fps | 96.1% |
| Rottweil R 903 | <<locked>> | 86% | 32,692 psi | 52% | 2372 fps | 95.2% |
| Shooters World AR Plus | <<locked>> | 80% | 51,706 psi | 83% | 2667 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 98% | 45,150 psi | 72% | 2575 fps | 95.1% |
| Shooters World Match Rifle | <<locked>> | 80% | 33,837 psi | 54% | 2392 fps | 98% |
| Shooters World Precision | <<locked>> | 80% | 31,517 psi | 51% | 2306 fps | 95.5% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 45,237 psi | 73% | 2536 fps | 98.6% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 52,040 psi | 83% | 2329 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 47,659 psi | 76% | 2615 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 36,738 psi | 59% | 2480 fps | 95.5% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 45,455 psi | 73% | 2536 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 43,685 psi | 70% | 2549 fps | 95.5% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 36,753 psi | 59% | 2431 fps | 95.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 36,985 psi | 59% | 2352 fps | 99.1% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 30,153 psi | 48% | 2221 fps | 98.5% |
| Somchem S321 | <<locked>> | 80% | 40,466 psi | 65% | 2503 fps | 98.3% |
| Somchem S335 | <<locked>> | 80% | 36,201 psi | 58% | 2352 fps | 99.5% |
| Somchem S341 | <<locked>> | 80% | 35,346 psi | 57% | 2392 fps | 95.1% |
| Somchem S355 | <<locked>> | 86% | 33,924 psi | 54% | 2385 fps | 95.4% |
| Somchem S365 | <<locked>> | 94% | 31,328 psi | 50% | 2402 fps | 95.5% |
| Vihtavuori N120 | <<locked>> | 80% | 51,967 psi | 83% | 2520 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 42,119 psi | 68% | 2431 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 37,144 psi | 60% | 2359 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 32,126 psi | 52% | 2329 fps | 99.8% |
| Vihtavuori N140 | <<locked>> | 80% | 33,185 psi | 53% | 2333 fps | 98.7% |
| Vihtavuori N150 | <<locked>> | 84% | 30,269 psi | 49% | 2280 fps | 95.6% |
| Vihtavuori N160 | <<locked>> | 98% | 42,366 psi | 68% | 2569 fps | 95.7% |
| Vihtavuori N530 | <<locked>> | 80% | 37,652 psi | 60% | 2425 fps | 97.5% |
| Vihtavuori N540 | <<locked>> | 80% | 31,676 psi | 51% | 2313 fps | 97.9% |
| Vihtavuori N550 | <<locked>> | 98% | 41,292 psi | 66% | 2572 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 35,679 psi | 57% | 2402 fps | 95.6% |
| Winchester 748 | <<locked>> | 80% | 36,564 psi | 59% | 2461 fps | 98% |
| Winchester StaBALL Match | <<locked>> | 80% | 33,417 psi | 54% | 2379 fps | 95.3% |
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 98 powders for 8.5 x 55 Blaser loaded with the .338 | 200gr | CutEdge ESP Raptor. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,874 fps; across all powders the maximum-charge window runs from 1,627 fps to 2,874 fps. Accurate 4350 gives the best case fill at 100 %, and 98 of the 98 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (430 MPa), the top charges use 55–90 %, leaving at least 10 % headroom. The 200.0 gr projectile in 0.338" calls for a 1:15.0 twist; slower twists will usually not stabilise this weight. Accurate 4350, Alliant Reloder- TS 15.5, Alliant Reloder-16 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 52, Hodgdon CFE223 rank at the top here: for 8.5 x 55 Blaser with the .338 | 200gr | CutEdge ESP Raptor 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.