Load Specifications
Bullet Manufacturer:Lapua
Bullet Weight:231 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:1:14.5
Load data in caliber 8.5 x 55 Blaser with .338 | 231gr | Lapua Naturalis bullet and 106 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>> | 88% | 54,926 psi | 88% | 2457 fps | 100% |
| Accurate 2460 | <<locked>> | 84% | 53,301 psi | 85% | 2484 fps | 100% |
| Accurate 2495 | <<locked>> | 94% | 55,608 psi | 89% | 2513 fps | 100% |
| Accurate 2520 | <<locked>> | 88% | 55,042 psi | 88% | 2539 fps | 100% |
| Accurate 2700 | <<locked>> | 92% | 53,055 psi | 85% | 2470 fps | 96.1% |
| Accurate 4064 | <<locked>> | 96% | 55,506 psi | 89% | 2556 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 47,790 psi | 77% | 2526 fps | 98.7% |
| Accurate LT-30 | <<locked>> | 82% | 54,621 psi | 88% | 2408 fps | 100% |
| Accurate LT-32 | <<locked>> | 82% | 55,042 psi | 88% | 2431 fps | 100% |
| ADI AR 2206H | <<locked>> | 90% | 54,186 psi | 87% | 2549 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 96% | 55,201 psi | 89% | 2549 fps | 99.7% |
| ADI AR 2219 | <<locked>> | 82% | 55,448 psi | 89% | 2520 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 88% | 53,461 psi | 86% | 2507 fps | 100% |
| Alliant AR-Comp | <<locked>> | 88% | 53,432 psi | 86% | 2484 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 84% | 54,998 psi | 88% | 2602 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 92% | 53,432 psi | 86% | 2654 fps | 99.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 96% | 54,375 psi | 87% | 2562 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 84% | 54,882 psi | 88% | 2461 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 94% | 55,129 psi | 88% | 2585 fps | 99.8% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 47,572 psi | 76% | 2539 fps | 98.8% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 55,042 psi | 88% | 2674 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 33,185 psi | 53% | 2287 fps | 96.4% |
| Baschieri & Pellagri 106 | <<locked>> | 82% | 53,679 psi | 86% | 2408 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 90% | 53,751 psi | 86% | 2562 fps | 99.4% |
| Bofors RP3 | <<locked>> | 96% | 54,534 psi | 87% | 2575 fps | 100% |
| Bofors RP7ᴾ | <<locked>> | 100% | 55,463 psi | 89% | 2546 fps | 96.9% |
| Hodgdon Benchmark | <<locked>> | 88% | 55,564 psi | 89% | 2493 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 90% | 55,912 psi | 90% | 2582 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 86% | 54,085 psi | 87% | 2621 fps | 99.7% |
| Hodgdon H322 | <<locked>> | 84% | 54,273 psi | 87% | 2503 fps | 100% |
| Hodgdon H335 | <<locked>> | 84% | 55,071 psi | 88% | 2530 fps | 100% |
| Hodgdon H380 | <<locked>> | 96% | 56,362 psi | 90% | 2592 fps | 99.3% |
| Hodgdon H414ᴾ | <<locked>> | 100% | 51,372 psi | 82% | 2579 fps | 96.9% |
| Hodgdon H4350ᴾ | <<locked>> | 100% | 56,376 psi | 90% | 2595 fps | 96.4% |
| Hodgdon H4895 | <<locked>> | 90% | 54,665 psi | 88% | 2559 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 43,540 psi | 70% | 2431 fps | 99.2% |
| Hodgdon LEVERevolution | <<locked>> | 92% | 53,447 psi | 86% | 2589 fps | 100% |
| Hodgdon Superformanceᴾ | <<locked>> | 100% | 52,678 psi | 84% | 2608 fps | 96.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,664 psi | 56% | 1506 fps | 100% |
| Hodgdon VARGET | <<locked>> | 92% | 56,144 psi | 90% | 2562 fps | 100% |
| IMR 3031 | <<locked>> | 90% | 54,143 psi | 87% | 2543 fps | 100% |
| IMR 4064 | <<locked>> | 94% | 54,563 psi | 87% | 2530 fps | 99.7% |
| IMR 4166 Enduron | <<locked>> | 92% | 55,230 psi | 89% | 2516 fps | 97.4% |
| IMR 4198 | <<locked>> | 84% | 55,506 psi | 89% | 2425 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 98% | 54,259 psi | 87% | 2530 fps | 97.1% |
| IMR 4831ᴾ | <<locked>> | 100% | 45,629 psi | 73% | 2477 fps | 98.4% |
| IMR 4895 | <<locked>> | 92% | 53,243 psi | 85% | 2569 fps | 99.8% |
| IMR 8208 XBR | <<locked>> | 88% | 53,461 psi | 86% | 2507 fps | 100% |
| Lovex D073.5 | <<locked>> | 84% | 53,069 psi | 85% | 2493 fps | 100% |
| Lovex D073.6 | <<locked>> | 90% | 53,098 psi | 85% | 2526 fps | 100% |
| Lovex S060 | <<locked>> | 90% | 54,230 psi | 87% | 2484 fps | 99.8% |
| Lovex S062 | <<locked>> | 94% | 53,824 psi | 86% | 2526 fps | 100% |
| Lovex S065ᴾ | <<locked>> | 100% | 52,895 psi | 85% | 2520 fps | 98.2% |
| Lovex S070ᴾ | <<locked>> | 100% | 50,357 psi | 81% | 2503 fps | 96.8% |
| Norma 201 | <<locked>> | 92% | 56,159 psi | 90% | 2543 fps | 100% |
| Norma 202 | <<locked>> | 90% | 53,200 psi | 85% | 2503 fps | 100% |
| Norma 203B | <<locked>> | 94% | 54,215 psi | 87% | 2572 fps | 99.9% |
| Norma URPᴾ | <<locked>> | 100% | 47,834 psi | 77% | 2526 fps | 98.6% |
| Ramshot Big Game | <<locked>> | 94% | 54,955 psi | 88% | 2598 fps | 99.9% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 46,891 psi | 75% | 2513 fps | 96.8% |
| Ramshot TAC | <<locked>> | 88% | 53,911 psi | 86% | 2526 fps | 98.5% |
| Ramshot Wild Boar | <<locked>> | 88% | 53,113 psi | 85% | 2543 fps | 99.8% |
| Ramshot X-Terminator | <<locked>> | 86% | 54,462 psi | 87% | 2510 fps | 99.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,012 psi | 56% | 1542 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 53,084 psi | 85% | 2493 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 94% | 53,359 psi | 86% | 2526 fps | 97.7% |
| ReloadSwiss RS 52 | <<locked>> | 92% | 55,361 psi | 89% | 2644 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 98% | 54,766 psi | 88% | 2674 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 47,442 psi | 76% | 2546 fps | 98.4% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 48,646 psi | 78% | 2572 fps | 98% |
| Rottweil R 901 | <<locked>> | 88% | 53,708 psi | 86% | 2484 fps | 100% |
| Rottweil R 902 | <<locked>> | 94% | 56,289 psi | 90% | 2536 fps | 100% |
| Rottweil R 903 | <<locked>> | 98% | 54,389 psi | 87% | 2566 fps | 100% |
| Rottweil R 907ᴾ | <<locked>> | 100% | 55,463 psi | 89% | 2546 fps | 96.9% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 52,895 psi | 85% | 2520 fps | 98.2% |
| Shooters World Match Rifle | <<locked>> | 90% | 53,098 psi | 85% | 2526 fps | 100% |
| Shooters World Precision | <<locked>> | 94% | 53,824 psi | 86% | 2526 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 50,357 psi | 81% | 2503 fps | 96.8% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 52,765 psi | 85% | 2464 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 82% | 55,883 psi | 90% | 2533 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 96% | 52,968 psi | 85% | 2582 fps | 99.8% |
| SNPE Vectan SP 3 | <<locked>> | 84% | 56,043 psi | 90% | 2484 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 90% | 55,550 psi | 89% | 2552 fps | 99.1% |
| SNPE Vectan SP 9 | <<locked>> | 92% | 55,869 psi | 90% | 2569 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 90% | 54,984 psi | 88% | 2448 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 96% | 54,549 psi | 87% | 2444 fps | 100% |
| SNPE Vectan Tubal 7000ᴾ | <<locked>> | 100% | 53,447 psi | 86% | 2480 fps | 97% |
| Somchem S321 | <<locked>> | 86% | 54,549 psi | 87% | 2539 fps | 100% |
| Somchem S335 | <<locked>> | 90% | 53,853 psi | 86% | 2444 fps | 100% |
| Somchem S341 | <<locked>> | 90% | 54,882 psi | 88% | 2543 fps | 99.8% |
| Somchem S355 | <<locked>> | 98% | 55,143 psi | 88% | 2569 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 42,453 psi | 68% | 2477 fps | 99.8% |
| Vihtavuori N130 | <<locked>> | 86% | 54,694 psi | 88% | 2415 fps | 100% |
| Vihtavuori N133 | <<locked>> | 90% | 55,085 psi | 88% | 2438 fps | 100% |
| Vihtavuori N135 | <<locked>> | 94% | 55,753 psi | 89% | 2507 fps | 100% |
| Vihtavuori N140 | <<locked>> | 92% | 53,853 psi | 86% | 2487 fps | 100% |
| Vihtavuori N150 | <<locked>> | 98% | 53,200 psi | 85% | 2507 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 50,343 psi | 81% | 2523 fps | 98.8% |
| Vihtavuori N530 | <<locked>> | 88% | 54,041 psi | 87% | 2510 fps | 100% |
| Vihtavuori N540 | <<locked>> | 94% | 55,405 psi | 89% | 2526 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 49,327 psi | 79% | 2530 fps | 98.6% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 35,172 psi | 56% | 2352 fps | 96.4% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 51,300 psi | 82% | 2513 fps | 99.9% |
| Winchester 748 | <<locked>> | 88% | 53,185 psi | 85% | 2549 fps | 100% |
| Winchester 760ᴾ | <<locked>> | 100% | 51,663 psi | 83% | 2582 fps | 97% |
| Winchester StaBALL Match | <<locked>> | 92% | 55,666 psi | 89% | 2579 fps | 100% |
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% | 42,801 psi | 69% | 2297 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 46,470 psi | 75% | 2392 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 34,824 psi | 56% | 2215 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 41,669 psi | 67% | 2352 fps | 100% |
| Accurate 2700 | <<locked>> | 90% | 49,748 psi | 80% | 2425 fps | 95.4% |
| Accurate 4064 | <<locked>> | 80% | 32,982 psi | 53% | 2205 fps | 99.6% |
| Accurate 4350 | <<locked>> | 90% | 33,576 psi | 54% | 2274 fps | 95.1% |
| Accurate LT-30 | <<locked>> | 80% | 51,503 psi | 83% | 2369 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 51,895 psi | 83% | 2388 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 39,465 psi | 63% | 2313 fps | 98.1% |
| ADI AR 2208 | <<locked>> | 80% | 33,591 psi | 54% | 2182 fps | 95.6% |
| ADI AR 2219 | <<locked>> | 80% | 51,924 psi | 83% | 2474 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 80% | 41,582 psi | 67% | 2326 fps | 99.3% |
| Alliant AR-Comp | <<locked>> | 80% | 40,828 psi | 65% | 2320 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 48,370 psi | 78% | 2503 fps | 99.7% |
| Alliant Power Pro 2000-MR | 50.4 gr | 80% | 35,375 psi | 57% | 2320 fps | 95.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 32,648 psi | 52% | 2195 fps | 97.1% |
| Alliant Reloder-10x | <<locked>> | 80% | 48,617 psi | 78% | 2382 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 35,288 psi | 57% | 2251 fps | 96.4% |
| Alliant Reloder-16 | <<locked>> | 90% | 34,867 psi | 56% | 2290 fps | 95.3% |
| Alliant Reloder-17 | <<locked>> | 82% | 30,008 psi | 48% | 2201 fps | 95.1% |
| Alliant Reloder-23 | <<locked>> | 98% | 31,328 psi | 50% | 2241 fps | 95.6% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 50,560 psi | 81% | 2369 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 38,406 psi | 62% | 2313 fps | 96.7% |
| Bofors RP3 | <<locked>> | 80% | 31,807 psi | 51% | 2195 fps | 97% |
| Bofors RP7 | <<locked>> | 96% | 48,994 psi | 79% | 2451 fps | 95.5% |
| Hodgdon Benchmark | <<locked>> | 80% | 43,424 psi | 70% | 2320 fps | 99.7% |
| Hodgdon BL-C2 | <<locked>> | 80% | 39,494 psi | 63% | 2336 fps | 99.4% |
| Hodgdon CFE223 | <<locked>> | 80% | 43,627 psi | 70% | 2461 fps | 98.5% |
| Hodgdon H322 | <<locked>> | 80% | 47,456 psi | 76% | 2415 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 48,167 psi | 77% | 2438 fps | 100% |
| Hodgdon H380 | <<locked>> | 84% | 37,681 psi | 60% | 2293 fps | 95.7% |
| Hodgdon H414 | <<locked>> | 96% | 45,049 psi | 72% | 2477 fps | 95.4% |
| Hodgdon H4350 | <<locked>> | 98% | 52,823 psi | 85% | 2546 fps | 95.7% |
| Hodgdon H4895 | <<locked>> | 80% | 39,755 psi | 64% | 2326 fps | 98.6% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 29,747 psi | 48% | 2149 fps | 95.2% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 35,636 psi | 57% | 2293 fps | 98.1% |
| Hodgdon Superformance | <<locked>> | 98% | 49,008 psi | 79% | 2552 fps | 95.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,875 psi | 41% | 1345 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 38,232 psi | 61% | 2283 fps | 98.2% |
| IMR 3031 | <<locked>> | 80% | 38,943 psi | 62% | 2326 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 35,215 psi | 56% | 2211 fps | 96.4% |
| IMR 4166 Enduron | <<locked>> | 86% | 45,687 psi | 73% | 2369 fps | 95.4% |
| IMR 4198 | <<locked>> | 80% | 49,400 psi | 79% | 2349 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 92% | 45,150 psi | 72% | 2392 fps | 95.1% |
| IMR 4831 | <<locked>> | 92% | 34,969 psi | 56% | 2283 fps | 95.6% |
| IMR 4895 | <<locked>> | 80% | 36,100 psi | 58% | 2280 fps | 97.3% |
| IMR 8208 XBR | <<locked>> | 80% | 41,582 psi | 67% | 2326 fps | 99.3% |
| Lovex D073.5 | <<locked>> | 80% | 46,296 psi | 74% | 2398 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 37,753 psi | 61% | 2293 fps | 99.7% |
| Lovex S060 | <<locked>> | 80% | 40,118 psi | 64% | 2264 fps | 98.2% |
| Lovex S062 | <<locked>> | 80% | 34,809 psi | 56% | 2215 fps | 98.1% |
| Lovex S065 | <<locked>> | 90% | 38,812 psi | 62% | 2290 fps | 95% |
| Lovex S070 | <<locked>> | 96% | 44,251 psi | 71% | 2408 fps | 95.3% |
| Norma 201 | <<locked>> | 80% | 38,392 psi | 62% | 2270 fps | 98.9% |
| Norma 202 | <<locked>> | 80% | 38,711 psi | 62% | 2283 fps | 99.9% |
| Norma 203B | <<locked>> | 80% | 34,664 psi | 56% | 2241 fps | 96.8% |
| Norma URP | <<locked>> | 90% | 34,476 psi | 55% | 2280 fps | 95.1% |
| Ramshot Big Game | <<locked>> | 80% | 33,939 psi | 54% | 2247 fps | 96.3% |
| Ramshot Hunter | <<locked>> | 96% | 41,263 psi | 66% | 2415 fps | 95.2% |
| Ramshot TAC | <<locked>> | 80% | 41,408 psi | 66% | 2326 fps | 96% |
| Ramshot Wild Boar | <<locked>> | 80% | 40,480 psi | 65% | 2343 fps | 98.2% |
| Ramshot X-Terminator | <<locked>> | 80% | 44,773 psi | 72% | 2365 fps | 98.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,078 psi | 42% | 1378 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 46,659 psi | 75% | 2402 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 43,859 psi | 70% | 2382 fps | 95.7% |
| ReloadSwiss RS 52 | 48.9 gr | 80% | 36,448 psi | 58% | 2336 fps | 96.8% |
| ReloadSwiss RS 60 | 49.7 gr | 80% | 30,037 psi | 48% | 2215 fps | 97.8% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 36,158 psi | 58% | 2346 fps | 95.5% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 39,624 psi | 64% | 2408 fps | 95.5% |
| Rottweil R 901 | <<locked>> | 80% | 42,148 psi | 68% | 2313 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 36,651 psi | 59% | 2231 fps | 98.5% |
| Rottweil R 903 | <<locked>> | 80% | 29,791 psi | 48% | 2139 fps | 95.9% |
| Rottweil R 907 | <<locked>> | 96% | 48,994 psi | 79% | 2451 fps | 95.5% |
| Shooters World Long Rifle | <<locked>> | 90% | 38,812 psi | 62% | 2290 fps | 95% |
| Shooters World Match Rifle | <<locked>> | 80% | 37,753 psi | 61% | 2293 fps | 99.7% |
| Shooters World Precision | <<locked>> | 80% | 34,809 psi | 56% | 2215 fps | 98.1% |
| Shooters World SW4350 | <<locked>> | 96% | 44,251 psi | 71% | 2408 fps | 95.3% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 49,153 psi | 79% | 2415 fps | 99.8% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 52,185 psi | 84% | 2484 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 31,169 psi | 50% | 2188 fps | 95.3% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 49,559 psi | 79% | 2402 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 39,175 psi | 63% | 2297 fps | 96% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 37,927 psi | 61% | 2283 fps | 97.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 40,263 psi | 65% | 2241 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 33,083 psi | 53% | 2123 fps | 99.8% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 46,862 psi | 75% | 2388 fps | 95.7% |
| Somchem S321 | <<locked>> | 80% | 44,570 psi | 71% | 2395 fps | 99.7% |
| Somchem S335 | <<locked>> | 80% | 39,595 psi | 63% | 2241 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 39,102 psi | 63% | 2300 fps | 97.9% |
| Somchem S355 | <<locked>> | 80% | 30,951 psi | 50% | 2152 fps | 96.1% |
| Somchem S365 | <<locked>> | 86% | 26,890 psi | 43% | 2129 fps | 95.5% |
| Vihtavuori N130 | <<locked>> | 80% | 45,701 psi | 73% | 2300 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 40,509 psi | 65% | 2241 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 35,737 psi | 57% | 2221 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 36,477 psi | 58% | 2228 fps | 99.9% |
| Vihtavuori N150 | <<locked>> | 80% | 29,327 psi | 47% | 2096 fps | 97% |
| Vihtavuori N160 | <<locked>> | 90% | 36,289 psi | 58% | 2283 fps | 95.7% |
| Vihtavuori N530 | <<locked>> | 80% | 41,437 psi | 66% | 2320 fps | 99.3% |
| Vihtavuori N540 | <<locked>> | 80% | 35,099 psi | 56% | 2218 fps | 99.6% |
| Vihtavuori N550 | <<locked>> | 90% | 35,317 psi | 57% | 2283 fps | 95.2% |
| Vihtavuori N555 | <<locked>> | 98% | 33,098 psi | 53% | 2306 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 30,095 psi | 48% | 2123 fps | 95.4% |
| Winchester 748 | <<locked>> | 80% | 40,567 psi | 65% | 2359 fps | 99.7% |
| Winchester 760 | <<locked>> | 96% | 45,310 psi | 73% | 2480 fps | 95.5% |
| Winchester StaBALL Match | <<locked>> | 80% | 37,028 psi | 59% | 2287 fps | 98% |
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 106 powders for 8.5 x 55 Blaser loaded with the .338 | 231gr | Lapua Naturalis. Alliant Reloder-17 delivers the highest muzzle velocity at 2,674 fps; across all powders the maximum-charge window runs from 1,506 fps to 2,674 fps. Accurate 4350 gives the best case fill at 100 %, and 106 of the 106 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (430 MPa), the top charges use 53–90 %, leaving at least 10 % headroom. The 231.0 gr projectile in 0.338" calls for a 1:14.5 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 | 231gr | Lapua Naturalis 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.