Load Specifications
Bullet Manufacturer:Speer
Bullet Weight:225 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 | 225gr | Speer Boat-Tail bullet and 104 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.
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% | 53,084 psi | 85% | 2470 fps | 100% |
| Accurate 2460 | <<locked>> | 84% | 54,853 psi | 88% | 2539 fps | 100% |
| Accurate 2495 | <<locked>> | 92% | 54,172 psi | 87% | 2533 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 52,895 psi | 85% | 2552 fps | 100% |
| Accurate 2700 | <<locked>> | 92% | 54,563 psi | 87% | 2530 fps | 96.2% |
| Accurate 4064 | <<locked>> | 94% | 53,983 psi | 87% | 2575 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 49,530 psi | 79% | 2589 fps | 98.8% |
| Accurate LT-30 | <<locked>> | 82% | 55,651 psi | 89% | 2461 fps | 100% |
| Accurate LT-32 | <<locked>> | 82% | 56,072 psi | 90% | 2484 fps | 100% |
| ADI AR 2206H | <<locked>> | 90% | 55,361 psi | 89% | 2605 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 96% | 56,420 psi | 90% | 2602 fps | 99.7% |
| ADI Benchmark 8208 | <<locked>> | 88% | 54,650 psi | 88% | 2562 fps | 100% |
| Alliant AR-Comp | <<locked>> | 88% | 54,984 psi | 88% | 2543 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 53,026 psi | 85% | 2612 fps | 99.9% |
| Alliant Power Pro 2000-MR | <<locked>> | 92% | 54,824 psi | 88% | 2713 fps | 99.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 96% | 55,738 psi | 89% | 2621 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 84% | 56,275 psi | 90% | 2516 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 92% | 53,113 psi | 85% | 2595 fps | 99.6% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 48,646 psi | 78% | 2595 fps | 98.9% |
| Alliant Reloder-17 | <<locked>> | 98% | 52,794 psi | 85% | 2684 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 34,519 psi | 55% | 2349 fps | 96.8% |
| Baschieri & Pellagri 106 | <<locked>> | 82% | 55,013 psi | 88% | 2464 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 90% | 55,143 psi | 88% | 2621 fps | 99.5% |
| Bofors RP3 | <<locked>> | 96% | 56,362 psi | 90% | 2638 fps | 100% |
| Bofors RP7 | <<locked>> | 98% | 53,548 psi | 86% | 2556 fps | 96.4% |
| Hodgdon Benchmark | <<locked>> | 86% | 53,432 psi | 86% | 2503 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 88% | 53,563 psi | 86% | 2592 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 86% | 55,463 psi | 89% | 2680 fps | 99.8% |
| Hodgdon H322 | <<locked>> | 84% | 55,347 psi | 89% | 2556 fps | 100% |
| Hodgdon H335 | <<locked>> | 82% | 52,910 psi | 85% | 2539 fps | 100% |
| Hodgdon H380 | <<locked>> | 94% | 54,157 psi | 87% | 2602 fps | 99% |
| Hodgdon H414ᴾ | <<locked>> | 100% | 52,910 psi | 85% | 2638 fps | 97.1% |
| Hodgdon H4350 | <<locked>> | 98% | 54,143 psi | 87% | 2605 fps | 95.8% |
| Hodgdon H4895 | <<locked>> | 90% | 55,927 psi | 90% | 2615 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 44,730 psi | 72% | 2487 fps | 99.3% |
| Hodgdon LEVERevolution | <<locked>> | 92% | 54,708 psi | 88% | 2644 fps | 100% |
| Hodgdon Superformanceᴾ | <<locked>> | 100% | 54,201 psi | 87% | 2671 fps | 96.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,143 psi | 56% | 1542 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 54,027 psi | 87% | 2575 fps | 99.9% |
| IMR 3031 | <<locked>> | 90% | 55,550 psi | 89% | 2598 fps | 100% |
| IMR 4064 | <<locked>> | 94% | 55,898 psi | 90% | 2585 fps | 99.8% |
| IMR 4166 Enduron | <<locked>> | 92% | 56,434 psi | 90% | 2569 fps | 97.5% |
| IMR 4198 | <<locked>> | 82% | 53,243 psi | 85% | 2438 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 98% | 55,579 psi | 89% | 2589 fps | 97.2% |
| IMR 4831ᴾ | <<locked>> | 100% | 47,108 psi | 76% | 2536 fps | 98.5% |
| IMR 4895 | <<locked>> | 92% | 54,433 psi | 87% | 2621 fps | 99.9% |
| IMR 8208 XBR | <<locked>> | 88% | 54,650 psi | 88% | 2562 fps | 100% |
| Lovex D073.5 | <<locked>> | 84% | 54,868 psi | 88% | 2552 fps | 100% |
| Lovex D073.6 | <<locked>> | 90% | 54,810 psi | 88% | 2585 fps | 100% |
| Lovex S060 | <<locked>> | 90% | 55,347 psi | 89% | 2539 fps | 99.9% |
| Lovex S062 | <<locked>> | 94% | 55,376 psi | 89% | 2582 fps | 100% |
| Lovex S065ᴾ | <<locked>> | 100% | 54,476 psi | 87% | 2582 fps | 98.4% |
| Lovex S070ᴾ | <<locked>> | 100% | 51,634 psi | 83% | 2559 fps | 96.9% |
| Norma 201 | <<locked>> | 90% | 54,114 psi | 87% | 2556 fps | 100% |
| Norma 202 | <<locked>> | 90% | 54,520 psi | 87% | 2559 fps | 100% |
| Norma 203B | <<locked>> | 94% | 55,898 psi | 90% | 2631 fps | 99.9% |
| Norma URPᴾ | <<locked>> | 100% | 49,008 psi | 79% | 2579 fps | 98.7% |
| Ramshot Big Game | <<locked>> | 94% | 56,347 psi | 90% | 2657 fps | 99.9% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 48,341 psi | 78% | 2575 fps | 97% |
| Ramshot TAC | <<locked>> | 88% | 55,100 psi | 88% | 2579 fps | 98.6% |
| Ramshot Wild Boar | <<locked>> | 88% | 54,418 psi | 87% | 2598 fps | 99.8% |
| Ramshot X-Terminator | <<locked>> | 86% | 55,767 psi | 89% | 2566 fps | 99.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,317 psi | 57% | 1575 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 54,360 psi | 87% | 2549 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 94% | 54,781 psi | 88% | 2585 fps | 97.8% |
| ReloadSwiss RS 52 | <<locked>> | 90% | 53,214 psi | 85% | 2654 fps | 99.6% |
| ReloadSwiss RS 60 | <<locked>> | 98% | 56,362 psi | 90% | 2736 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 49,066 psi | 79% | 2608 fps | 98.5% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 49,980 psi | 80% | 2631 fps | 98.2% |
| Rottweil R 901 | <<locked>> | 88% | 55,230 psi | 89% | 2539 fps | 100% |
| Rottweil R 902 | <<locked>> | 92% | 54,491 psi | 87% | 2552 fps | 100% |
| Rottweil R 903 | <<locked>> | 98% | 55,927 psi | 90% | 2625 fps | 100% |
| Rottweil R 907 | <<locked>> | 98% | 53,548 psi | 86% | 2556 fps | 96.4% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 54,476 psi | 87% | 2582 fps | 98.4% |
| Shooters World Match Rifle | <<locked>> | 90% | 54,810 psi | 88% | 2585 fps | 100% |
| Shooters World Precision | <<locked>> | 94% | 55,376 psi | 89% | 2582 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 51,634 psi | 83% | 2559 fps | 96.9% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 53,954 psi | 87% | 2520 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 96% | 54,404 psi | 87% | 2638 fps | 99.8% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 53,983 psi | 87% | 2497 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 88% | 53,171 psi | 85% | 2556 fps | 98.7% |
| SNPE Vectan SP 9 | <<locked>> | 90% | 53,795 psi | 86% | 2579 fps | 99.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 90% | 56,333 psi | 90% | 2503 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 96% | 55,883 psi | 90% | 2497 fps | 100% |
| SNPE Vectan Tubal 7000ᴾ | <<locked>> | 100% | 54,955 psi | 88% | 2536 fps | 97.1% |
| Somchem S321 | <<locked>> | 86% | 56,014 psi | 90% | 2598 fps | 100% |
| Somchem S335 | <<locked>> | 90% | 55,158 psi | 88% | 2500 fps | 100% |
| Somchem S341 | <<locked>> | 90% | 56,391 psi | 90% | 2602 fps | 99.9% |
| Somchem S355 | <<locked>> | 96% | 53,127 psi | 85% | 2579 fps | 99.9% |
| Somchem S365ᴾ | <<locked>> | 100% | 43,888 psi | 70% | 2536 fps | 99.9% |
| Vihtavuori N130 | <<locked>> | 86% | 56,144 psi | 90% | 2470 fps | 100% |
| Vihtavuori N133 | <<locked>> | 90% | 56,333 psi | 90% | 2490 fps | 100% |
| Vihtavuori N135 | <<locked>> | 92% | 53,911 psi | 86% | 2523 fps | 100% |
| Vihtavuori N140 | <<locked>> | 92% | 54,969 psi | 88% | 2536 fps | 100% |
| Vihtavuori N150 | <<locked>> | 98% | 54,505 psi | 87% | 2562 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 51,779 psi | 83% | 2582 fps | 98.9% |
| Vihtavuori N530 | <<locked>> | 88% | 55,230 psi | 89% | 2562 fps | 100% |
| Vihtavuori N540 | <<locked>> | 92% | 53,359 psi | 86% | 2539 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 50,691 psi | 81% | 2585 fps | 98.7% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 36,709 psi | 59% | 2415 fps | 96.8% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 52,605 psi | 84% | 2569 fps | 99.9% |
| Winchester 748 | <<locked>> | 88% | 54,607 psi | 88% | 2608 fps | 100% |
| Winchester 760ᴾ | <<locked>> | 100% | 53,200 psi | 85% | 2641 fps | 97.1% |
| Winchester StaBALL Match | <<locked>> | 90% | 53,490 psi | 86% | 2589 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% | 44,382 psi | 71% | 2352 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 48,138 psi | 77% | 2451 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 36,753 psi | 59% | 2277 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 43,265 psi | 69% | 2411 fps | 100% |
| Accurate 2700 | <<locked>> | 90% | 51,010 psi | 82% | 2480 fps | 95.5% |
| Accurate 4064 | <<locked>> | 80% | 34,780 psi | 56% | 2267 fps | 99.7% |
| Accurate 4350 | <<locked>> | 90% | 34,998 psi | 56% | 2333 fps | 95.4% |
| Accurate LT-30 | <<locked>> | 80% | 52,605 psi | 84% | 2421 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 53,011 psi | 85% | 2444 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 40,683 psi | 65% | 2369 fps | 98.2% |
| ADI AR 2208 | <<locked>> | 80% | 34,548 psi | 55% | 2231 fps | 95.7% |
| ADI Benchmark 8208 | <<locked>> | 80% | 42,743 psi | 69% | 2382 fps | 99.4% |
| Alliant AR-Comp | <<locked>> | 80% | 42,250 psi | 68% | 2375 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 49,705 psi | 80% | 2562 fps | 99.8% |
| Alliant Power Pro 2000-MR | 51.7 gr | 80% | 36,579 psi | 59% | 2379 fps | 96% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 33,924 psi | 54% | 2254 fps | 97.4% |
| Alliant Reloder-10x | <<locked>> | 80% | 49,864 psi | 80% | 2434 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 36,550 psi | 59% | 2310 fps | 96.7% |
| Alliant Reloder-16 | <<locked>> | 90% | 35,955 psi | 58% | 2346 fps | 95.6% |
| Alliant Reloder-17 | <<locked>> | 82% | 31,154 psi | 50% | 2260 fps | 95.5% |
| Alliant Reloder-23 | <<locked>> | 98% | 32,503 psi | 52% | 2300 fps | 95.9% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 51,605 psi | 83% | 2421 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 39,595 psi | 63% | 2369 fps | 96.9% |
| Bofors RP3 | <<locked>> | 80% | 33,243 psi | 53% | 2254 fps | 97.3% |
| Bofors RP7 | <<locked>> | 94% | 47,268 psi | 76% | 2461 fps | 95% |
| Hodgdon Benchmark | <<locked>> | 80% | 44,541 psi | 71% | 2372 fps | 99.8% |
| Hodgdon BL-C2 | <<locked>> | 80% | 40,901 psi | 66% | 2395 fps | 99.5% |
| Hodgdon CFE223 | <<locked>> | 80% | 44,846 psi | 72% | 2520 fps | 98.6% |
| Hodgdon H322 | <<locked>> | 80% | 48,675 psi | 78% | 2470 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 49,472 psi | 79% | 2493 fps | 100% |
| Hodgdon H380 | <<locked>> | 82% | 36,680 psi | 59% | 2303 fps | 95.2% |
| Hodgdon H414 | <<locked>> | 96% | 46,427 psi | 74% | 2536 fps | 95.6% |
| Hodgdon H4350 | <<locked>> | 96% | 50,908 psi | 82% | 2556 fps | 95% |
| Hodgdon H4895 | <<locked>> | 80% | 41,046 psi | 66% | 2382 fps | 98.7% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 30,937 psi | 50% | 2208 fps | 95.6% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 36,738 psi | 59% | 2349 fps | 98.2% |
| Hodgdon Superformance | <<locked>> | 98% | 50,546 psi | 81% | 2615 fps | 95.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,136 psi | 42% | 1375 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 39,349 psi | 63% | 2336 fps | 98.3% |
| IMR 3031 | <<locked>> | 80% | 40,103 psi | 64% | 2379 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 36,230 psi | 58% | 2260 fps | 96.6% |
| IMR 4166 Enduron | <<locked>> | 86% | 46,833 psi | 75% | 2425 fps | 95.5% |
| IMR 4198 | <<locked>> | 80% | 50,183 psi | 80% | 2398 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 92% | 46,383 psi | 74% | 2448 fps | 95.3% |
| IMR 4831 | <<locked>> | 90% | 34,185 psi | 55% | 2297 fps | 95.1% |
| IMR 4895 | <<locked>> | 80% | 37,405 psi | 60% | 2336 fps | 97.5% |
| IMR 8208 XBR | <<locked>> | 80% | 42,743 psi | 69% | 2382 fps | 99.4% |
| Lovex D073.5 | <<locked>> | 80% | 47,950 psi | 77% | 2457 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 39,146 psi | 63% | 2349 fps | 99.8% |
| Lovex S060 | <<locked>> | 80% | 41,060 psi | 66% | 2316 fps | 98.3% |
| Lovex S062 | <<locked>> | 80% | 35,998 psi | 58% | 2267 fps | 98.3% |
| Lovex S065 | <<locked>> | 90% | 40,089 psi | 64% | 2346 fps | 95.3% |
| Lovex S070 | <<locked>> | 96% | 45,614 psi | 73% | 2464 fps | 95.6% |
| Norma 201 | <<locked>> | 80% | 39,827 psi | 64% | 2329 fps | 99% |
| Norma 202 | <<locked>> | 80% | 40,030 psi | 64% | 2339 fps | 100% |
| Norma 203B | <<locked>> | 80% | 35,940 psi | 58% | 2300 fps | 97.1% |
| Norma URP | <<locked>> | 90% | 35,694 psi | 57% | 2336 fps | 95.4% |
| Ramshot Big Game | <<locked>> | 80% | 35,157 psi | 56% | 2303 fps | 96.5% |
| Ramshot Hunter | <<locked>> | 96% | 42,583 psi | 68% | 2474 fps | 95.4% |
| Ramshot TAC | <<locked>> | 80% | 42,569 psi | 68% | 2382 fps | 96.2% |
| Ramshot Wild Boar | <<locked>> | 80% | 41,742 psi | 67% | 2398 fps | 98.4% |
| Ramshot X-Terminator | <<locked>> | 80% | 46,006 psi | 74% | 2421 fps | 98.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,368 psi | 42% | 1407 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 47,761 psi | 77% | 2454 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 42,279 psi | 68% | 2385 fps | 95.1% |
| ReloadSwiss RS 52 | 50.1 gr | 80% | 37,666 psi | 60% | 2392 fps | 97% |
| ReloadSwiss RS 60 | 50.9 gr | 80% | 31,053 psi | 50% | 2270 fps | 98.1% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 37,463 psi | 60% | 2402 fps | 95.7% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 40,872 psi | 66% | 2467 fps | 95.8% |
| Rottweil R 901 | <<locked>> | 80% | 43,627 psi | 70% | 2369 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 37,898 psi | 61% | 2283 fps | 98.6% |
| Rottweil R 903 | <<locked>> | 80% | 31,227 psi | 50% | 2198 fps | 96.3% |
| Rottweil R 907 | <<locked>> | 94% | 47,268 psi | 76% | 2461 fps | 95% |
| Shooters World Long Rifle | <<locked>> | 90% | 40,089 psi | 64% | 2346 fps | 95.3% |
| Shooters World Match Rifle | <<locked>> | 80% | 39,146 psi | 63% | 2349 fps | 99.8% |
| Shooters World Precision | <<locked>> | 80% | 35,998 psi | 58% | 2267 fps | 98.3% |
| Shooters World SW4350 | <<locked>> | 96% | 45,614 psi | 73% | 2464 fps | 95.6% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 50,430 psi | 81% | 2470 fps | 99.9% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 32,256 psi | 52% | 2244 fps | 95.6% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 50,633 psi | 81% | 2454 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 40,567 psi | 65% | 2352 fps | 96.3% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 39,030 psi | 63% | 2339 fps | 97.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 41,365 psi | 66% | 2293 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 34,142 psi | 55% | 2172 fps | 99.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 45,165 psi | 72% | 2395 fps | 95.1% |
| Somchem S321 | <<locked>> | 80% | 45,919 psi | 74% | 2454 fps | 99.8% |
| Somchem S335 | <<locked>> | 80% | 40,930 psi | 66% | 2297 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 40,335 psi | 65% | 2356 fps | 98% |
| Somchem S355 | <<locked>> | 80% | 32,314 psi | 52% | 2211 fps | 96.4% |
| Somchem S365 | <<locked>> | 86% | 28,137 psi | 45% | 2192 fps | 95.9% |
| Vihtavuori N130 | <<locked>> | 80% | 46,833 psi | 75% | 2352 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 41,582 psi | 67% | 2290 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 36,985 psi | 59% | 2274 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 37,739 psi | 61% | 2280 fps | 99.9% |
| Vihtavuori N150 | <<locked>> | 80% | 30,603 psi | 49% | 2156 fps | 97.3% |
| Vihtavuori N160 | <<locked>> | 88% | 35,172 psi | 56% | 2293 fps | 95.1% |
| Vihtavuori N530 | <<locked>> | 80% | 42,656 psi | 68% | 2375 fps | 99.4% |
| Vihtavuori N540 | <<locked>> | 80% | 36,289 psi | 58% | 2270 fps | 99.7% |
| Vihtavuori N550 | <<locked>> | 90% | 36,680 psi | 59% | 2343 fps | 95.4% |
| Vihtavuori N555 | <<locked>> | 96% | 32,329 psi | 52% | 2316 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 31,241 psi | 50% | 2178 fps | 95.7% |
| Winchester 748 | <<locked>> | 80% | 41,698 psi | 67% | 2415 fps | 99.7% |
| Winchester 760 | <<locked>> | 96% | 46,688 psi | 75% | 2539 fps | 95.7% |
| Winchester StaBALL Match | <<locked>> | 80% | 38,334 psi | 61% | 2343 fps | 98.2% |
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 104 powders for 8.5 x 55 Blaser loaded with the .338 | 225gr | Speer Boat-Tail. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,736 fps; across all powders the maximum-charge window runs from 1,542 fps to 2,736 fps. Accurate 4350 gives the best case fill at 100 %, and 104 of the 104 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 225.0 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-23 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 | Speer Boat-Tail 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.