Load Specifications
Bullet:.338 | 225gr | Woodleigh HS
Bullet Manufacturer:Woodleigh
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:1:15.5
Load data in caliber 8.5 x 55 Blaser with .338 | 225gr | Woodleigh HS bullet and 104 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% | 53,142 psi | 85% | 2470 fps | 100% |
| Accurate 2460 | <<locked>> | 84% | 54,882 psi | 88% | 2539 fps | 100% |
| Accurate 2495 | <<locked>> | 92% | 54,186 psi | 87% | 2533 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 52,953 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% | 2572 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 49,574 psi | 79% | 2589 fps | 98.8% |
| Accurate LT-30 | <<locked>> | 82% | 55,680 psi | 89% | 2457 fps | 100% |
| Accurate LT-32 | <<locked>> | 82% | 56,130 psi | 90% | 2484 fps | 100% |
| ADI AR 2206H | <<locked>> | 90% | 55,419 psi | 89% | 2605 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 96% | 56,188 psi | 90% | 2598 fps | 99.7% |
| ADI Benchmark 8208 | <<locked>> | 88% | 54,708 psi | 88% | 2562 fps | 100% |
| Alliant AR-Comp | <<locked>> | 88% | 55,042 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% | 54,897 psi | 88% | 2713 fps | 99.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 96% | 55,825 psi | 90% | 2621 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 84% | 56,333 psi | 90% | 2516 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 92% | 53,142 psi | 85% | 2595 fps | 99.6% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 48,675 psi | 78% | 2592 fps | 98.9% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 56,289 psi | 90% | 2733 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 34,534 psi | 55% | 2349 fps | 96.8% |
| Baschieri & Pellagri 106 | <<locked>> | 82% | 54,752 psi | 88% | 2461 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 90% | 55,216 psi | 89% | 2621 fps | 99.5% |
| Bofors RP3 | <<locked>> | 96% | 56,405 psi | 90% | 2638 fps | 100% |
| Bofors RP7 | <<locked>> | 98% | 53,577 psi | 86% | 2556 fps | 96.4% |
| Hodgdon Benchmark | <<locked>> | 86% | 53,490 psi | 86% | 2503 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 88% | 53,635 psi | 86% | 2592 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 86% | 55,448 psi | 89% | 2680 fps | 99.8% |
| Hodgdon H322 | <<locked>> | 84% | 55,361 psi | 89% | 2556 fps | 100% |
| Hodgdon H335 | <<locked>> | 82% | 52,910 psi | 85% | 2539 fps | 100% |
| Hodgdon H380 | <<locked>> | 94% | 54,201 psi | 87% | 2602 fps | 99% |
| Hodgdon H414ᴾ | <<locked>> | 100% | 52,997 psi | 85% | 2638 fps | 97.1% |
| Hodgdon H4350 | <<locked>> | 98% | 54,215 psi | 87% | 2605 fps | 95.8% |
| Hodgdon H4895 | <<locked>> | 90% | 55,912 psi | 90% | 2615 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 44,788 psi | 72% | 2484 fps | 99.3% |
| Hodgdon LEVERevolution | <<locked>> | 92% | 54,737 psi | 88% | 2644 fps | 100% |
| Hodgdon Superformanceᴾ | <<locked>> | 100% | 54,201 psi | 87% | 2671 fps | 96.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,940 psi | 56% | 1539 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 53,809 psi | 86% | 2569 fps | 99.9% |
| IMR 3031 | <<locked>> | 90% | 55,622 psi | 89% | 2598 fps | 100% |
| IMR 4064 | <<locked>> | 94% | 55,970 psi | 90% | 2585 fps | 99.8% |
| IMR 4166 Enduron | <<locked>> | 90% | 52,924 psi | 85% | 2520 fps | 96.8% |
| IMR 4198 | <<locked>> | 82% | 53,301 psi | 85% | 2438 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 98% | 55,651 psi | 89% | 2589 fps | 97.2% |
| IMR 4831ᴾ | <<locked>> | 100% | 47,181 psi | 76% | 2536 fps | 98.5% |
| IMR 4895 | <<locked>> | 92% | 54,505 psi | 87% | 2621 fps | 99.9% |
| IMR 8208 XBR | <<locked>> | 88% | 54,708 psi | 88% | 2562 fps | 100% |
| Lovex D073.5 | <<locked>> | 84% | 54,868 psi | 88% | 2552 fps | 100% |
| Lovex D073.6 | <<locked>> | 90% | 54,795 psi | 88% | 2585 fps | 100% |
| Lovex S060 | <<locked>> | 90% | 55,361 psi | 89% | 2539 fps | 99.9% |
| Lovex S062 | <<locked>> | 94% | 55,448 psi | 89% | 2582 fps | 100% |
| Lovex S065ᴾ | <<locked>> | 100% | 54,462 psi | 87% | 2579 fps | 98.3% |
| Lovex S070ᴾ | <<locked>> | 100% | 51,634 psi | 83% | 2559 fps | 96.9% |
| Norma 201 | <<locked>> | 90% | 54,143 psi | 87% | 2552 fps | 100% |
| Norma 202 | <<locked>> | 90% | 54,578 psi | 88% | 2559 fps | 100% |
| Norma 203B | <<locked>> | 94% | 55,666 psi | 89% | 2628 fps | 99.9% |
| Norma URPᴾ | <<locked>> | 100% | 49,081 psi | 79% | 2579 fps | 98.7% |
| Ramshot Big Game | <<locked>> | 94% | 56,420 psi | 90% | 2657 fps | 99.9% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 48,414 psi | 78% | 2575 fps | 97% |
| Ramshot TAC | <<locked>> | 88% | 55,100 psi | 88% | 2579 fps | 98.6% |
| Ramshot Wild Boar | <<locked>> | 88% | 54,447 psi | 87% | 2598 fps | 99.8% |
| Ramshot X-Terminator | <<locked>> | 86% | 55,840 psi | 90% | 2566 fps | 99.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,331 psi | 57% | 1575 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 54,418 psi | 87% | 2546 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 94% | 54,563 psi | 87% | 2582 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% | 49,153 psi | 79% | 2608 fps | 98.5% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 49,748 psi | 80% | 2628 fps | 98.1% |
| Rottweil R 901 | <<locked>> | 88% | 55,274 psi | 89% | 2539 fps | 100% |
| Rottweil R 902 | <<locked>> | 92% | 54,549 psi | 87% | 2552 fps | 100% |
| Rottweil R 903 | <<locked>> | 98% | 55,999 psi | 90% | 2625 fps | 100% |
| Rottweil R 907 | <<locked>> | 98% | 53,577 psi | 86% | 2556 fps | 96.4% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 54,462 psi | 87% | 2579 fps | 98.3% |
| Shooters World Match Rifle | <<locked>> | 90% | 54,795 psi | 88% | 2585 fps | 100% |
| Shooters World Precision | <<locked>> | 94% | 55,448 psi | 89% | 2582 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 51,634 psi | 83% | 2559 fps | 96.9% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 54,027 psi | 87% | 2520 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 96% | 54,433 psi | 87% | 2638 fps | 99.8% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 54,041 psi | 87% | 2497 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 88% | 53,243 psi | 85% | 2556 fps | 98.7% |
| SNPE Vectan SP 9 | <<locked>> | 90% | 53,824 psi | 86% | 2579 fps | 99.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 90% | 56,072 psi | 90% | 2500 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 96% | 55,927 psi | 90% | 2497 fps | 100% |
| SNPE Vectan Tubal 7000ᴾ | <<locked>> | 100% | 54,969 psi | 88% | 2536 fps | 97.1% |
| Somchem S321 | <<locked>> | 86% | 56,043 psi | 90% | 2598 fps | 100% |
| Somchem S335 | <<locked>> | 90% | 55,216 psi | 89% | 2500 fps | 100% |
| Somchem S341 | <<locked>> | 90% | 56,434 psi | 90% | 2598 fps | 99.9% |
| Somchem S355 | <<locked>> | 96% | 53,200 psi | 85% | 2579 fps | 99.9% |
| Somchem S365ᴾ | <<locked>> | 100% | 43,700 psi | 70% | 2533 fps | 99.9% |
| Vihtavuori N130 | <<locked>> | 86% | 55,898 psi | 90% | 2467 fps | 100% |
| Vihtavuori N133 | <<locked>> | 90% | 56,101 psi | 90% | 2487 fps | 100% |
| Vihtavuori N135 | <<locked>> | 92% | 53,983 psi | 87% | 2523 fps | 100% |
| Vihtavuori N140 | <<locked>> | 92% | 55,042 psi | 88% | 2536 fps | 100% |
| Vihtavuori N150 | <<locked>> | 98% | 54,505 psi | 87% | 2559 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 51,851 psi | 83% | 2582 fps | 98.9% |
| Vihtavuori N530 | <<locked>> | 88% | 55,303 psi | 89% | 2562 fps | 100% |
| Vihtavuori N540 | <<locked>> | 92% | 53,069 psi | 85% | 2536 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 50,720 psi | 81% | 2585 fps | 98.7% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 36,767 psi | 59% | 2415 fps | 96.7% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 52,634 psi | 84% | 2569 fps | 99.9% |
| Winchester 748 | <<locked>> | 88% | 54,679 psi | 88% | 2608 fps | 100% |
| Winchester 760ᴾ | <<locked>> | 100% | 52,997 psi | 85% | 2638 fps | 97.1% |
| Winchester StaBALL Match | <<locked>> | 90% | 53,519 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% | 44,164 psi | 71% | 2349 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 48,196 psi | 77% | 2451 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 36,782 psi | 59% | 2277 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 43,294 psi | 69% | 2411 fps | 100% |
| Accurate 2700 | <<locked>> | 90% | 51,068 psi | 82% | 2480 fps | 95.5% |
| Accurate 4064 | <<locked>> | 80% | 34,780 psi | 56% | 2267 fps | 99.7% |
| Accurate 4350 | <<locked>> | 90% | 35,056 psi | 56% | 2336 fps | 95.4% |
| Accurate LT-30 | <<locked>> | 80% | 52,315 psi | 84% | 2415 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 52,721 psi | 85% | 2438 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 40,538 psi | 65% | 2365 fps | 98.2% |
| ADI AR 2208 | <<locked>> | 80% | 34,563 psi | 55% | 2231 fps | 95.7% |
| ADI Benchmark 8208 | <<locked>> | 80% | 42,540 psi | 68% | 2375 fps | 99.3% |
| Alliant AR-Comp | <<locked>> | 80% | 42,264 psi | 68% | 2375 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 49,472 psi | 79% | 2559 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% | 33,968 psi | 54% | 2254 fps | 97.4% |
| Alliant Reloder-10x | <<locked>> | 80% | 49,893 psi | 80% | 2434 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 36,361 psi | 58% | 2303 fps | 96.6% |
| Alliant Reloder-16 | <<locked>> | 90% | 35,998 psi | 58% | 2346 fps | 95.6% |
| Alliant Reloder-17 | <<locked>> | 82% | 31,198 psi | 50% | 2260 fps | 95.5% |
| Alliant Reloder-23 | <<locked>> | 98% | 32,518 psi | 52% | 2300 fps | 95.9% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 51,416 psi | 82% | 2418 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 39,421 psi | 63% | 2365 fps | 96.8% |
| Bofors RP3 | <<locked>> | 80% | 33,272 psi | 53% | 2254 fps | 97.3% |
| Bofors RP7 | <<locked>> | 96% | 50,357 psi | 81% | 2507 fps | 95.7% |
| Hodgdon Benchmark | <<locked>> | 80% | 44,599 psi | 72% | 2372 fps | 99.8% |
| Hodgdon BL-C2 | <<locked>> | 80% | 40,901 psi | 66% | 2395 fps | 99.5% |
| Hodgdon CFE223 | <<locked>> | 80% | 44,904 psi | 72% | 2520 fps | 98.6% |
| Hodgdon H322 | <<locked>> | 80% | 48,689 psi | 78% | 2467 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 49,530 psi | 79% | 2493 fps | 100% |
| Hodgdon H380 | <<locked>> | 82% | 36,506 psi | 59% | 2300 fps | 95.2% |
| Hodgdon H414 | <<locked>> | 96% | 46,499 psi | 75% | 2536 fps | 95.6% |
| Hodgdon H4350 | <<locked>> | 96% | 50,966 psi | 82% | 2556 fps | 95% |
| Hodgdon H4895 | <<locked>> | 80% | 40,843 psi | 65% | 2375 fps | 98.7% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 30,937 psi | 50% | 2205 fps | 95.6% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 36,724 psi | 59% | 2346 fps | 98.2% |
| Hodgdon Superformance | <<locked>> | 98% | 50,343 psi | 81% | 2612 fps | 95.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,150 psi | 42% | 1375 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 39,392 psi | 63% | 2336 fps | 98.3% |
| IMR 3031 | <<locked>> | 80% | 40,147 psi | 64% | 2379 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 36,245 psi | 58% | 2260 fps | 96.6% |
| IMR 4166 Enduron | <<locked>> | 86% | 46,833 psi | 75% | 2425 fps | 95.5% |
| IMR 4198 | <<locked>> | 80% | 50,227 psi | 81% | 2398 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 92% | 46,369 psi | 74% | 2448 fps | 95.3% |
| IMR 4831 | <<locked>> | 90% | 34,185 psi | 55% | 2297 fps | 95.1% |
| IMR 4895 | <<locked>> | 80% | 37,217 psi | 60% | 2333 fps | 97.5% |
| IMR 8208 XBR | <<locked>> | 80% | 42,540 psi | 68% | 2375 fps | 99.3% |
| Lovex D073.5 | <<locked>> | 80% | 47,935 psi | 77% | 2457 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 39,175 psi | 63% | 2349 fps | 99.8% |
| Lovex S060 | <<locked>> | 80% | 41,060 psi | 66% | 2313 fps | 98.3% |
| Lovex S062 | <<locked>> | 80% | 36,013 psi | 58% | 2267 fps | 98.3% |
| Lovex S065 | <<locked>> | 90% | 40,103 psi | 64% | 2346 fps | 95.3% |
| Lovex S070 | <<locked>> | 96% | 45,643 psi | 73% | 2464 fps | 95.5% |
| Norma 201 | <<locked>> | 80% | 39,871 psi | 64% | 2329 fps | 99% |
| Norma 202 | <<locked>> | 80% | 40,045 psi | 64% | 2339 fps | 100% |
| Norma 203B | <<locked>> | 80% | 35,752 psi | 57% | 2293 fps | 97% |
| Norma URP | <<locked>> | 90% | 35,708 psi | 57% | 2336 fps | 95.4% |
| Ramshot Big Game | <<locked>> | 80% | 35,201 psi | 56% | 2303 fps | 96.5% |
| Ramshot Hunter | <<locked>> | 96% | 42,583 psi | 68% | 2474 fps | 95.4% |
| Ramshot TAC | <<locked>> | 80% | 42,380 psi | 68% | 2379 fps | 96.1% |
| Ramshot Wild Boar | <<locked>> | 80% | 41,756 psi | 67% | 2398 fps | 98.4% |
| Ramshot X-Terminator | <<locked>> | 80% | 45,992 psi | 74% | 2421 fps | 98.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,397 psi | 42% | 1407 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 47,819 psi | 77% | 2454 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 42,337 psi | 68% | 2385 fps | 95.1% |
| ReloadSwiss RS 52 | 50.1 gr | 80% | 37,652 psi | 60% | 2392 fps | 97% |
| ReloadSwiss RS 60 | 50.9 gr | 80% | 31,082 psi | 50% | 2270 fps | 98.1% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 37,449 psi | 60% | 2402 fps | 95.7% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 40,901 psi | 66% | 2464 fps | 95.8% |
| Rottweil R 901 | <<locked>> | 80% | 43,685 psi | 70% | 2369 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 37,927 psi | 61% | 2283 fps | 98.6% |
| Rottweil R 903 | <<locked>> | 80% | 31,227 psi | 50% | 2198 fps | 96.3% |
| Rottweil R 907 | <<locked>> | 96% | 50,357 psi | 81% | 2507 fps | 95.7% |
| Shooters World Long Rifle | <<locked>> | 90% | 40,103 psi | 64% | 2346 fps | 95.3% |
| Shooters World Match Rifle | <<locked>> | 80% | 39,175 psi | 63% | 2349 fps | 99.8% |
| Shooters World Precision | <<locked>> | 80% | 36,013 psi | 58% | 2267 fps | 98.3% |
| Shooters World SW4350 | <<locked>> | 96% | 45,643 psi | 73% | 2464 fps | 95.5% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 50,459 psi | 81% | 2470 fps | 99.9% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 32,300 psi | 52% | 2241 fps | 95.5% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 50,647 psi | 81% | 2454 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 40,596 psi | 65% | 2352 fps | 96.3% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 39,044 psi | 63% | 2339 fps | 97.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 41,394 psi | 66% | 2290 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 34,142 psi | 55% | 2172 fps | 99.8% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 45,150 psi | 72% | 2395 fps | 95.1% |
| Somchem S321 | <<locked>> | 80% | 45,716 psi | 73% | 2448 fps | 99.8% |
| Somchem S335 | <<locked>> | 80% | 40,930 psi | 66% | 2297 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 40,147 psi | 64% | 2352 fps | 98% |
| Somchem S355 | <<locked>> | 80% | 32,343 psi | 52% | 2208 fps | 96.4% |
| Somchem S365 | <<locked>> | 86% | 28,137 psi | 45% | 2192 fps | 95.9% |
| Vihtavuori N130 | <<locked>> | 80% | 46,876 psi | 75% | 2349 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 41,568 psi | 67% | 2290 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 37,028 psi | 59% | 2274 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 37,724 psi | 60% | 2280 fps | 99.9% |
| Vihtavuori N150 | <<locked>> | 80% | 30,618 psi | 49% | 2152 fps | 97.2% |
| Vihtavuori N160 | <<locked>> | 88% | 35,201 psi | 56% | 2293 fps | 95% |
| Vihtavuori N530 | <<locked>> | 80% | 42,656 psi | 68% | 2375 fps | 99.4% |
| Vihtavuori N540 | <<locked>> | 80% | 36,332 psi | 58% | 2270 fps | 99.7% |
| Vihtavuori N550 | <<locked>> | 90% | 36,695 psi | 59% | 2343 fps | 95.4% |
| Vihtavuori N555 | <<locked>> | 96% | 32,372 psi | 52% | 2316 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 31,111 psi | 50% | 2175 fps | 95.6% |
| Winchester 748 | <<locked>> | 80% | 41,756 psi | 67% | 2415 fps | 99.7% |
| Winchester 760 | <<locked>> | 96% | 46,499 psi | 75% | 2536 fps | 95.6% |
| Winchester StaBALL Match | <<locked>> | 80% | 38,377 psi | 62% | 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 | Woodleigh HS. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,736 fps; across all powders the maximum-charge window runs from 1,539 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 1:15.5 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 | 225gr | Woodleigh HS 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.