Load Specifications
Load data in caliber 8.5 x 55 Blaser with .338 | 220gr | Peregrine Glider GRM 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 LEVERevolution.
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>> | 92% | 55,767 psi | 89% | 2503 fps | 100% |
| Accurate 2200 | <<locked>> | 82% | 53,113 psi | 85% | 2546 fps | 98.8% |
| Accurate 2230 | <<locked>> | 82% | 53,606 psi | 86% | 2556 fps | 99.1% |
| Accurate 2460 | <<locked>> | 88% | 54,230 psi | 87% | 2530 fps | 100% |
| Accurate 2495 | <<locked>> | 98% | 55,463 psi | 89% | 2552 fps | 100% |
| Accurate 2520 | <<locked>> | 92% | 55,593 psi | 89% | 2582 fps | 100% |
| Accurate 4064ᴾ | <<locked>> | 100% | 55,129 psi | 88% | 2592 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 40,814 psi | 65% | 2444 fps | 96.1% |
| Accurate LT-30 | <<locked>> | 84% | 53,287 psi | 85% | 2418 fps | 100% |
| Accurate LT-32 | <<locked>> | 84% | 53,708 psi | 86% | 2441 fps | 100% |
| ADI AR 2206H | <<locked>> | 94% | 54,853 psi | 88% | 2585 fps | 99.5% |
| ADI AR 2207 | <<locked>> | 82% | 54,273 psi | 87% | 2431 fps | 100% |
| ADI AR 2208ᴾ | <<locked>> | 100% | 55,564 psi | 89% | 2575 fps | 99.1% |
| ADI AR 2219 | <<locked>> | 84% | 53,185 psi | 85% | 2526 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 92% | 54,389 psi | 87% | 2549 fps | 99.9% |
| Alliant AR-Comp | <<locked>> | 92% | 53,417 psi | 86% | 2526 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 88% | 55,840 psi | 90% | 2644 fps | 99.8% |
| Alliant Power Pro 2000-MR | <<locked>> | 96% | 54,302 psi | 87% | 2684 fps | 99% |
| Alliant Reloder- TS 15.5ᴾ | <<locked>> | 100% | 54,578 psi | 88% | 2595 fps | 99.8% |
| Alliant Reloder-10x | <<locked>> | 88% | 55,695 psi | 89% | 2507 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 98% | 55,680 psi | 89% | 2618 fps | 99.3% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 41,974 psi | 67% | 2454 fps | 96.3% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 48,138 psi | 77% | 2595 fps | 99.2% |
| Alliant Reloder-7 | <<locked>> | 82% | 55,303 psi | 89% | 2451 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 86% | 55,564 psi | 89% | 2461 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 94% | 54,549 psi | 87% | 2598 fps | 98.8% |
| Bofors RP3ᴾ | <<locked>> | 100% | 54,433 psi | 87% | 2605 fps | 99.8% |
| Hodgdon Benchmark | <<locked>> | 90% | 53,359 psi | 86% | 2493 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 94% | 56,246 psi | 90% | 2621 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 90% | 54,520 psi | 87% | 2657 fps | 99.2% |
| Hodgdon H322 | <<locked>> | 88% | 55,085 psi | 88% | 2549 fps | 100% |
| Hodgdon H335 | <<locked>> | 88% | 56,376 psi | 90% | 2579 fps | 100% |
| Hodgdon H380 | <<locked>> | 98% | 52,953 psi | 85% | 2569 fps | 98% |
| Hodgdon H4198 | <<locked>> | 82% | 55,143 psi | 88% | 2457 fps | 100% |
| Hodgdon H4895 | <<locked>> | 94% | 55,288 psi | 89% | 2598 fps | 99.8% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 38,203 psi | 61% | 2352 fps | 97% |
| Hodgdon LEVERevolution | <<locked>> | 96% | 53,548 psi | 86% | 2621 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,171 psi | 55% | 1506 fps | 100% |
| Hodgdon VARGET | <<locked>> | 94% | 53,461 psi | 86% | 2552 fps | 99.6% |
| IMR 3031 | <<locked>> | 94% | 54,012 psi | 87% | 2582 fps | 100% |
| IMR 4064 | <<locked>> | 98% | 55,259 psi | 89% | 2562 fps | 99.2% |
| IMR 4198 | <<locked>> | 86% | 53,432 psi | 86% | 2438 fps | 100% |
| IMR 4895 | <<locked>> | 96% | 53,505 psi | 86% | 2602 fps | 99.4% |
| IMR 8208 XBR | <<locked>> | 92% | 54,389 psi | 87% | 2549 fps | 99.9% |
| Lovex D073.4 | <<locked>> | 82% | 54,201 psi | 87% | 2536 fps | 100% |
| Lovex D073.5 | <<locked>> | 88% | 54,186 psi | 87% | 2536 fps | 100% |
| Lovex D073.6 | <<locked>> | 94% | 53,214 psi | 85% | 2562 fps | 100% |
| Lovex S060 | <<locked>> | 94% | 55,521 psi | 89% | 2523 fps | 99.5% |
| Lovex S062 | <<locked>> | 98% | 54,215 psi | 87% | 2559 fps | 99.9% |
| Lovex S065ᴾ | <<locked>> | 100% | 46,978 psi | 75% | 2454 fps | 95.9% |
| Norma 200 | <<locked>> | 84% | 55,709 psi | 89% | 2484 fps | 100% |
| Norma 201 | <<locked>> | 94% | 53,142 psi | 85% | 2533 fps | 99.8% |
| Norma 202 | <<locked>> | 94% | 53,635 psi | 86% | 2543 fps | 100% |
| Norma 203B | <<locked>> | 98% | 54,679 psi | 88% | 2605 fps | 99.5% |
| Norma URPᴾ | <<locked>> | 100% | 41,727 psi | 67% | 2448 fps | 96.1% |
| Ramshot Big Game | <<locked>> | 98% | 55,259 psi | 89% | 2631 fps | 99.4% |
| Ramshot TAC | <<locked>> | 92% | 54,998 psi | 88% | 2559 fps | 97.7% |
| Ramshot Wild Boar | <<locked>> | 92% | 53,766 psi | 86% | 2575 fps | 99.3% |
| Ramshot X-Terminator | <<locked>> | 90% | 55,883 psi | 90% | 2552 fps | 99.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,214 psi | 55% | 1539 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 88% | 54,143 psi | 87% | 2536 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 98% | 53,896 psi | 86% | 2552 fps | 96.6% |
| ReloadSwiss RS 52 | <<locked>> | 96% | 55,376 psi | 89% | 2677 fps | 99.3% |
| ReloadSwiss RS 60ᴾ | <<locked>> | 100% | 51,532 psi | 83% | 2657 fps | 100% |
| Rottweil R 901 | <<locked>> | 92% | 54,070 psi | 87% | 2520 fps | 100% |
| Rottweil R 902 | <<locked>> | 96% | 53,635 psi | 86% | 2533 fps | 99.9% |
| Rottweil R 903ᴾ | <<locked>> | 100% | 50,792 psi | 81% | 2549 fps | 99.5% |
| Shooters World AR Plus | <<locked>> | 82% | 54,201 psi | 87% | 2536 fps | 100% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 46,978 psi | 75% | 2454 fps | 95.9% |
| Shooters World Match Rifle | <<locked>> | 94% | 53,214 psi | 85% | 2562 fps | 100% |
| Shooters World Precision | <<locked>> | 98% | 54,215 psi | 87% | 2559 fps | 99.9% |
| Shooters World Tactical Rifle | <<locked>> | 86% | 54,172 psi | 87% | 2510 fps | 99.7% |
| SNPE Vectan BA6 1/2 | <<locked>> | 82% | 54,085 psi | 87% | 2198 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 84% | 53,287 psi | 85% | 2533 fps | 100% |
| SNPE Vectan SP 11ᴾ | <<locked>> | 100% | 52,866 psi | 85% | 2608 fps | 99.3% |
| SNPE Vectan SP 3 | <<locked>> | 86% | 53,650 psi | 86% | 2487 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 94% | 56,362 psi | 90% | 2582 fps | 98.3% |
| SNPE Vectan SP 9 | <<locked>> | 94% | 53,011 psi | 85% | 2556 fps | 99.3% |
| SNPE Vectan Tubal 3000 | <<locked>> | 94% | 56,202 psi | 90% | 2490 fps | 100% |
| SNPE Vectan Tubal 5000ᴾ | <<locked>> | 100% | 55,405 psi | 89% | 2484 fps | 100% |
| Somchem S321 | <<locked>> | 90% | 55,448 psi | 89% | 2582 fps | 100% |
| Somchem S335 | <<locked>> | 94% | 54,549 psi | 87% | 2487 fps | 100% |
| Somchem S341 | <<locked>> | 94% | 55,854 psi | 90% | 2582 fps | 99.5% |
| Somchem S355ᴾ | <<locked>> | 100% | 51,764 psi | 83% | 2552 fps | 99.5% |
| Somchem S365ᴾ | <<locked>> | 100% | 36,999 psi | 59% | 2395 fps | 98.2% |
| Vihtavuori N120 | <<locked>> | 82% | 54,186 psi | 87% | 2382 fps | 100% |
| Vihtavuori N130 | <<locked>> | 90% | 55,927 psi | 90% | 2464 fps | 100% |
| Vihtavuori N133 | <<locked>> | 94% | 55,985 psi | 90% | 2480 fps | 100% |
| Vihtavuori N135 | <<locked>> | 98% | 55,724 psi | 89% | 2543 fps | 100% |
| Vihtavuori N140 | <<locked>> | 96% | 54,244 psi | 87% | 2523 fps | 100% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 50,038 psi | 80% | 2493 fps | 99.8% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 44,179 psi | 71% | 2451 fps | 96.6% |
| Vihtavuori N530 | <<locked>> | 92% | 54,882 psi | 88% | 2546 fps | 99.9% |
| Vihtavuori N540 | <<locked>> | 98% | 55,724 psi | 89% | 2566 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 42,699 psi | 68% | 2448 fps | 96.1% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 45,426 psi | 73% | 2441 fps | 98.6% |
| Winchester 748 | <<locked>> | 92% | 53,606 psi | 86% | 2589 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 96% | 56,202 psi | 90% | 2615 fps | 99.8% |
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% | 38,247 psi | 61% | 2257 fps | 100% |
| Accurate 2200 | <<locked>> | 80% | 49,443 psi | 79% | 2493 fps | 98.3% |
| Accurate 2230 | <<locked>> | 80% | 49,835 psi | 80% | 2500 fps | 98.6% |
| Accurate 2460 | <<locked>> | 80% | 41,336 psi | 66% | 2343 fps | 99.8% |
| Accurate 2495 | <<locked>> | 80% | 30,124 psi | 48% | 2159 fps | 99.8% |
| Accurate 2520 | <<locked>> | 80% | 36,651 psi | 59% | 2297 fps | 99% |
| Accurate 4064 | <<locked>> | 80% | 28,572 psi | 46% | 2142 fps | 98% |
| Accurate 4350 | <<locked>> | 98% | 37,971 psi | 61% | 2392 fps | 95.3% |
| Accurate LT-30 | <<locked>> | 80% | 47,152 psi | 76% | 2336 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 47,587 psi | 76% | 2356 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 35,128 psi | 56% | 2254 fps | 95.7% |
| ADI AR 2207 | <<locked>> | 80% | 51,126 psi | 82% | 2392 fps | 100% |
| ADI AR 2208 | <<locked>> | 86% | 36,187 psi | 58% | 2257 fps | 95.2% |
| ADI AR 2219 | <<locked>> | 80% | 46,296 psi | 74% | 2431 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 80% | 37,144 psi | 60% | 2270 fps | 97.6% |
| Alliant AR-Comp | <<locked>> | 80% | 35,737 psi | 57% | 2280 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 42,743 psi | 69% | 2441 fps | 98.4% |
| Alliant Power Pro 2000-MR | 50.2 gr | 86% | 38,551 psi | 62% | 2405 fps | 95.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 30,429 psi | 49% | 2175 fps | 95.1% |
| Alliant Reloder-10x | <<locked>> | 80% | 43,584 psi | 70% | 2346 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 35,476 psi | 57% | 2280 fps | 95.2% |
| Alliant Reloder-16 | <<locked>> | 98% | 39,668 psi | 64% | 2408 fps | 95.5% |
| Alliant Reloder-17 | <<locked>> | 90% | 34,621 psi | 56% | 2333 fps | 95.6% |
| Alliant Reloder-7 | <<locked>> | 80% | 52,170 psi | 84% | 2411 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 45,687 psi | 73% | 2333 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 38,914 psi | 62% | 2346 fps | 95.6% |
| Bofors RP3 | <<locked>> | 84% | 31,691 psi | 51% | 2221 fps | 95.8% |
| Hodgdon Benchmark | <<locked>> | 80% | 39,305 psi | 63% | 2270 fps | 98.6% |
| Hodgdon BL-C2 | <<locked>> | 80% | 34,693 psi | 56% | 2274 fps | 97.6% |
| Hodgdon CFE223 | <<locked>> | 80% | 38,363 psi | 62% | 2388 fps | 96.1% |
| Hodgdon H322 | <<locked>> | 80% | 42,264 psi | 68% | 2369 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 42,902 psi | 69% | 2388 fps | 99.9% |
| Hodgdon H380 | <<locked>> | 90% | 40,437 psi | 65% | 2372 fps | 95.3% |
| Hodgdon H4198 | <<locked>> | 80% | 51,996 psi | 83% | 2418 fps | 100% |
| Hodgdon H4895 | <<locked>> | 80% | 35,317 psi | 57% | 2264 fps | 96.5% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 33,562 psi | 54% | 2257 fps | 95.3% |
| Hodgdon LEVERevolution | 45.8 gr | 80% | 31,343 psi | 50% | 2221 fps | 95.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,266 psi | 41% | 1345 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 34,055 psi | 55% | 2221 fps | 95.9% |
| IMR 3031 | <<locked>> | 80% | 33,953 psi | 54% | 2270 fps | 99.9% |
| IMR 4064 | <<locked>> | 84% | 35,549 psi | 57% | 2241 fps | 95.3% |
| IMR 4198 | <<locked>> | 80% | 44,889 psi | 72% | 2323 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 33,953 psi | 54% | 2260 fps | 95.4% |
| IMR 8208 XBR | <<locked>> | 80% | 37,144 psi | 60% | 2270 fps | 97.6% |
| Lovex D073.4 | <<locked>> | 80% | 50,415 psi | 81% | 2487 fps | 100% |
| Lovex D073.5 | <<locked>> | 80% | 41,060 psi | 66% | 2343 fps | 99.2% |
| Lovex D073.6 | <<locked>> | 80% | 32,895 psi | 53% | 2231 fps | 98.2% |
| Lovex S060 | <<locked>> | 80% | 36,230 psi | 58% | 2208 fps | 96% |
| Lovex S062 | <<locked>> | 80% | 30,792 psi | 49% | 2152 fps | 95.8% |
| Lovex S065 | <<locked>> | 98% | 44,063 psi | 71% | 2405 fps | 95.2% |
| Norma 200 | <<locked>> | 80% | 48,965 psi | 79% | 2402 fps | 100% |
| Norma 201 | <<locked>> | 80% | 34,185 psi | 55% | 2211 fps | 96.9% |
| Norma 202 | <<locked>> | 80% | 34,330 psi | 55% | 2231 fps | 99% |
| Norma 203B | <<locked>> | 84% | 34,795 psi | 56% | 2270 fps | 95.7% |
| Norma URP | <<locked>> | 98% | 39,117 psi | 63% | 2395 fps | 95.3% |
| Ramshot Big Game | <<locked>> | 84% | 34,447 psi | 55% | 2280 fps | 95.1% |
| Ramshot TAC | <<locked>> | 86% | 45,208 psi | 72% | 2411 fps | 95.7% |
| Ramshot Wild Boar | <<locked>> | 80% | 35,897 psi | 58% | 2280 fps | 95.9% |
| Ramshot X-Terminator | <<locked>> | 80% | 40,190 psi | 64% | 2310 fps | 97% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,411 psi | 41% | 1378 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 41,655 psi | 67% | 2349 fps | 99.5% |
| ReloadSwiss RS 50 | <<locked>> | 94% | 47,224 psi | 76% | 2454 fps | 95.1% |
| ReloadSwiss RS 52 | 47.6 gr | 84% | 36,637 psi | 59% | 2365 fps | 95.6% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 28,456 psi | 46% | 2182 fps | 95.4% |
| Rottweil R 901 | <<locked>> | 80% | 37,753 psi | 61% | 2264 fps | 99.3% |
| Rottweil R 902 | <<locked>> | 80% | 32,503 psi | 52% | 2169 fps | 96.3% |
| Rottweil R 903 | <<locked>> | 86% | 31,807 psi | 51% | 2215 fps | 95.5% |
| Shooters World AR Plus | <<locked>> | 80% | 50,415 psi | 81% | 2487 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 98% | 44,063 psi | 71% | 2405 fps | 95.2% |
| Shooters World Match Rifle | <<locked>> | 80% | 32,895 psi | 53% | 2231 fps | 98.2% |
| Shooters World Precision | <<locked>> | 80% | 30,792 psi | 49% | 2152 fps | 95.8% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 44,077 psi | 71% | 2362 fps | 98.7% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 51,329 psi | 82% | 2165 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 46,717 psi | 75% | 2441 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 35,708 psi | 57% | 2313 fps | 95.7% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 44,454 psi | 71% | 2362 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 42,670 psi | 68% | 2382 fps | 95.7% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 33,663 psi | 54% | 2221 fps | 95.1% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 36,216 psi | 58% | 2195 fps | 99.2% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 29,472 psi | 47% | 2073 fps | 98.6% |
| Somchem S321 | <<locked>> | 80% | 39,450 psi | 63% | 2336 fps | 98.5% |
| Somchem S335 | <<locked>> | 80% | 35,476 psi | 57% | 2195 fps | 99.6% |
| Somchem S341 | <<locked>> | 80% | 34,432 psi | 55% | 2231 fps | 95.3% |
| Somchem S355 | <<locked>> | 86% | 33,011 psi | 53% | 2224 fps | 95.6% |
| Somchem S365 | <<locked>> | 94% | 30,516 psi | 49% | 2244 fps | 95.7% |
| Vihtavuori N120 | <<locked>> | 80% | 51,068 psi | 82% | 2346 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 41,278 psi | 66% | 2267 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 36,303 psi | 58% | 2198 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 31,299 psi | 50% | 2172 fps | 99.9% |
| Vihtavuori N140 | <<locked>> | 80% | 32,372 psi | 52% | 2175 fps | 98.8% |
| Vihtavuori N150 | <<locked>> | 82% | 27,586 psi | 44% | 2080 fps | 95% |
| Vihtavuori N160 | <<locked>> | 96% | 38,783 psi | 62% | 2352 fps | 95% |
| Vihtavuori N530 | <<locked>> | 80% | 36,956 psi | 59% | 2264 fps | 97.7% |
| Vihtavuori N540 | <<locked>> | 80% | 30,951 psi | 50% | 2159 fps | 98% |
| Vihtavuori N550 | <<locked>> | 98% | 40,059 psi | 64% | 2402 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 34,853 psi | 56% | 2244 fps | 95.8% |
| Winchester 748 | <<locked>> | 80% | 35,549 psi | 57% | 2297 fps | 98.1% |
| Winchester StaBALL Match | <<locked>> | 80% | 32,735 psi | 52% | 2224 fps | 95.6% |
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 117 powders for 8.5 x 55 Blaser loaded with the .338 | 220gr | Peregrine Glider GRM. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,684 fps; across all powders the maximum-charge window runs from 1,506 fps to 2,684 fps. Accurate 4064 gives the best case fill at 100 %, and 117 of the 117 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (430 MPa), the top charges use 47–90 %, leaving at least 10 % headroom. The 220.0 gr projectile in 0.338" calls for a 1:11.0 twist; slower twists will usually not stabilise this weight. Accurate 4064, Accurate 4350, ADI AR 2208 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 LEVERevolution rank at the top here: for 8.5 x 55 Blaser with the .338 | 220gr | Peregrine Glider GRM they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 2700, Alliant Reloder-23, Bofors RP7 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.