Load Specifications
Bullet Manufacturer:Sierra
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 | Sierra Pro-Hunter 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% | 53,171 psi | 85% | 2474 fps | 100% |
| Accurate 2460 | <<locked>> | 84% | 54,940 psi | 88% | 2539 fps | 100% |
| Accurate 2495 | <<locked>> | 92% | 54,259 psi | 87% | 2533 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 52,982 psi | 85% | 2549 fps | 100% |
| Accurate 2700 | <<locked>> | 92% | 54,331 psi | 87% | 2526 fps | 96.2% |
| Accurate 4064 | <<locked>> | 94% | 54,056 psi | 87% | 2572 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 49,603 psi | 80% | 2592 fps | 98.8% |
| Accurate LT-30 | <<locked>> | 82% | 55,724 psi | 89% | 2461 fps | 100% |
| Accurate LT-32 | <<locked>> | 82% | 56,144 psi | 90% | 2484 fps | 100% |
| ADI AR 2206H | <<locked>> | 90% | 55,448 psi | 89% | 2605 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 96% | 56,260 psi | 90% | 2598 fps | 99.7% |
| ADI Benchmark 8208 | <<locked>> | 88% | 54,694 psi | 88% | 2562 fps | 100% |
| Alliant AR-Comp | <<locked>> | 88% | 54,737 psi | 88% | 2539 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 52,765 psi | 85% | 2608 fps | 99.9% |
| Alliant Power Pro 2000-MR | <<locked>> | 92% | 54,679 psi | 88% | 2710 fps | 99.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 96% | 55,840 psi | 90% | 2621 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 84% | 56,347 psi | 90% | 2516 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 92% | 53,200 psi | 85% | 2595 fps | 99.6% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 48,689 psi | 78% | 2595 fps | 98.9% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 56,275 psi | 90% | 2733 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 34,403 psi | 55% | 2343 fps | 96.7% |
| Baschieri & Pellagri 106 | <<locked>> | 82% | 54,795 psi | 88% | 2461 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 90% | 54,984 psi | 88% | 2618 fps | 99.4% |
| Bofors RP3 | <<locked>> | 96% | 56,434 psi | 90% | 2638 fps | 100% |
| Bofors RP7 | <<locked>> | 98% | 53,345 psi | 86% | 2552 fps | 96.3% |
| Hodgdon Benchmark | <<locked>> | 86% | 53,476 psi | 86% | 2503 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 88% | 53,650 psi | 86% | 2592 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 86% | 55,506 psi | 89% | 2680 fps | 99.8% |
| Hodgdon H322 | <<locked>> | 84% | 55,419 psi | 89% | 2556 fps | 100% |
| Hodgdon H335 | <<locked>> | 84% | 56,318 psi | 90% | 2582 fps | 100% |
| Hodgdon H380 | <<locked>> | 94% | 54,259 psi | 87% | 2602 fps | 99% |
| Hodgdon H414ᴾ | <<locked>> | 100% | 52,765 psi | 85% | 2635 fps | 97% |
| Hodgdon H4350 | <<locked>> | 98% | 54,288 psi | 87% | 2605 fps | 95.8% |
| Hodgdon H4895 | <<locked>> | 90% | 55,970 psi | 90% | 2615 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 44,817 psi | 72% | 2484 fps | 99.3% |
| Hodgdon LEVERevolution | <<locked>> | 92% | 54,810 psi | 88% | 2644 fps | 100% |
| Hodgdon Superformanceᴾ | <<locked>> | 100% | 54,273 psi | 87% | 2671 fps | 96.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,954 psi | 56% | 1539 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 53,824 psi | 86% | 2569 fps | 99.9% |
| IMR 3031 | <<locked>> | 90% | 55,637 psi | 89% | 2598 fps | 100% |
| IMR 4064 | <<locked>> | 94% | 55,724 psi | 89% | 2582 fps | 99.7% |
| IMR 4166 Enduron | <<locked>> | 90% | 52,910 psi | 85% | 2520 fps | 96.8% |
| IMR 4198 | <<locked>> | 82% | 53,287 psi | 85% | 2438 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 98% | 55,361 psi | 89% | 2582 fps | 97.2% |
| IMR 4831ᴾ | <<locked>> | 100% | 47,195 psi | 76% | 2536 fps | 98.5% |
| IMR 4895 | <<locked>> | 92% | 54,520 psi | 87% | 2625 fps | 99.9% |
| IMR 8208 XBR | <<locked>> | 88% | 54,694 psi | 88% | 2562 fps | 100% |
| Lovex D073.5 | <<locked>> | 84% | 54,940 psi | 88% | 2552 fps | 100% |
| Lovex D073.6 | <<locked>> | 90% | 54,868 psi | 88% | 2585 fps | 100% |
| Lovex S060 | <<locked>> | 90% | 55,419 psi | 89% | 2539 fps | 99.9% |
| Lovex S062 | <<locked>> | 94% | 55,463 psi | 89% | 2582 fps | 100% |
| Lovex S065ᴾ | <<locked>> | 100% | 54,244 psi | 87% | 2575 fps | 98.3% |
| Lovex S070ᴾ | <<locked>> | 100% | 51,706 psi | 83% | 2559 fps | 96.9% |
| Norma 201 | <<locked>> | 90% | 54,201 psi | 87% | 2556 fps | 100% |
| Norma 202 | <<locked>> | 90% | 54,563 psi | 87% | 2559 fps | 100% |
| Norma 203B | <<locked>> | 94% | 55,680 psi | 89% | 2628 fps | 99.9% |
| Norma URPᴾ | <<locked>> | 100% | 49,110 psi | 79% | 2582 fps | 98.7% |
| Ramshot Big Game | <<locked>> | 94% | 56,115 psi | 90% | 2654 fps | 99.9% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 48,211 psi | 77% | 2572 fps | 96.9% |
| Ramshot TAC | <<locked>> | 88% | 55,158 psi | 88% | 2579 fps | 98.6% |
| Ramshot Wild Boar | <<locked>> | 88% | 54,215 psi | 87% | 2595 fps | 99.8% |
| Ramshot X-Terminator | <<locked>> | 86% | 55,869 psi | 90% | 2566 fps | 99.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,331 psi | 57% | 1575 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 54,186 psi | 87% | 2543 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 94% | 54,636 psi | 88% | 2582 fps | 97.8% |
| ReloadSwiss RS 52 | <<locked>> | 90% | 53,272 psi | 85% | 2654 fps | 99.6% |
| ReloadSwiss RS 60 | <<locked>> | 98% | 56,420 psi | 90% | 2736 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 49,139 psi | 79% | 2608 fps | 98.5% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 49,821 psi | 80% | 2628 fps | 98.1% |
| Rottweil R 901 | <<locked>> | 88% | 55,259 psi | 89% | 2539 fps | 100% |
| Rottweil R 902 | <<locked>> | 92% | 54,549 psi | 87% | 2552 fps | 100% |
| Rottweil R 903 | <<locked>> | 98% | 55,985 psi | 90% | 2625 fps | 100% |
| Rottweil R 907 | <<locked>> | 98% | 53,345 psi | 86% | 2552 fps | 96.3% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 54,244 psi | 87% | 2575 fps | 98.3% |
| Shooters World Match Rifle | <<locked>> | 90% | 54,868 psi | 88% | 2585 fps | 100% |
| Shooters World Precision | <<locked>> | 94% | 55,463 psi | 89% | 2582 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 51,706 psi | 83% | 2559 fps | 96.9% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 54,041 psi | 87% | 2520 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 96% | 54,201 psi | 87% | 2635 fps | 99.8% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 53,795 psi | 86% | 2493 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 88% | 53,272 psi | 85% | 2559 fps | 98.7% |
| SNPE Vectan SP 9 | <<locked>> | 90% | 53,882 psi | 86% | 2579 fps | 99.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 90% | 56,144 psi | 90% | 2500 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 96% | 55,985 psi | 90% | 2500 fps | 100% |
| SNPE Vectan Tubal 7000ᴾ | <<locked>> | 100% | 55,013 psi | 88% | 2536 fps | 97.1% |
| Somchem S321 | <<locked>> | 86% | 55,811 psi | 89% | 2595 fps | 100% |
| Somchem S335 | <<locked>> | 90% | 55,216 psi | 89% | 2500 fps | 100% |
| Somchem S341 | <<locked>> | 90% | 56,202 psi | 90% | 2595 fps | 99.9% |
| Somchem S355 | <<locked>> | 96% | 53,185 psi | 85% | 2579 fps | 99.9% |
| Somchem S365ᴾ | <<locked>> | 100% | 43,758 psi | 70% | 2533 fps | 99.9% |
| Vihtavuori N130 | <<locked>> | 86% | 55,941 psi | 90% | 2467 fps | 100% |
| Vihtavuori N133 | <<locked>> | 90% | 56,159 psi | 90% | 2487 fps | 100% |
| Vihtavuori N135 | <<locked>> | 92% | 53,969 psi | 87% | 2523 fps | 100% |
| Vihtavuori N140 | <<locked>> | 92% | 55,056 psi | 88% | 2539 fps | 100% |
| Vihtavuori N150 | <<locked>> | 98% | 54,578 psi | 88% | 2559 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 51,837 psi | 83% | 2582 fps | 98.9% |
| Vihtavuori N530 | <<locked>> | 88% | 55,317 psi | 89% | 2562 fps | 100% |
| Vihtavuori N540 | <<locked>> | 92% | 53,127 psi | 85% | 2536 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 50,792 psi | 81% | 2585 fps | 98.7% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 36,782 psi | 59% | 2415 fps | 96.8% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 52,707 psi | 85% | 2569 fps | 99.9% |
| Winchester 748 | <<locked>> | 88% | 54,665 psi | 88% | 2608 fps | 100% |
| Winchester 760ᴾ | <<locked>> | 100% | 53,011 psi | 85% | 2638 fps | 97.1% |
| Winchester StaBALL Match | <<locked>> | 90% | 53,592 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% | 44,179 psi | 71% | 2349 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 48,225 psi | 77% | 2451 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 36,840 psi | 59% | 2280 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 43,337 psi | 69% | 2411 fps | 100% |
| Accurate 2700 | <<locked>> | 90% | 51,097 psi | 82% | 2477 fps | 95.5% |
| Accurate 4064 | <<locked>> | 80% | 34,824 psi | 56% | 2267 fps | 99.7% |
| Accurate 4350 | <<locked>> | 90% | 35,070 psi | 56% | 2333 fps | 95.4% |
| Accurate LT-30 | <<locked>> | 80% | 52,359 psi | 84% | 2418 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 52,765 psi | 85% | 2441 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 40,524 psi | 65% | 2365 fps | 98.1% |
| ADI AR 2208 | <<locked>> | 80% | 34,606 psi | 55% | 2231 fps | 95.7% |
| ADI Benchmark 8208 | <<locked>> | 80% | 42,554 psi | 68% | 2379 fps | 99.3% |
| Alliant AR-Comp | <<locked>> | 80% | 42,061 psi | 67% | 2372 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 49,516 psi | 79% | 2559 fps | 99.8% |
| Alliant Power Pro 2000-MR | 51.7 gr | 80% | 36,622 psi | 59% | 2379 fps | 96% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 33,779 psi | 54% | 2247 fps | 97.3% |
| Alliant Reloder-10x | <<locked>> | 80% | 49,937 psi | 80% | 2434 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 36,405 psi | 58% | 2303 fps | 96.6% |
| Alliant Reloder-16 | <<locked>> | 90% | 35,998 psi | 58% | 2349 fps | 95.6% |
| Alliant Reloder-17 | <<locked>> | 82% | 31,183 psi | 50% | 2260 fps | 95.5% |
| Alliant Reloder-23 | <<locked>> | 98% | 32,518 psi | 52% | 2297 fps | 95.9% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 51,445 psi | 82% | 2418 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 39,465 psi | 63% | 2365 fps | 96.9% |
| Bofors RP3 | <<locked>> | 80% | 33,257 psi | 53% | 2251 fps | 97.3% |
| Bofors RP7 | <<locked>> | 96% | 50,386 psi | 81% | 2510 fps | 95.7% |
| Hodgdon Benchmark | <<locked>> | 80% | 44,614 psi | 72% | 2372 fps | 99.8% |
| Hodgdon BL-C2 | <<locked>> | 80% | 40,944 psi | 66% | 2395 fps | 99.5% |
| Hodgdon CFE223 | <<locked>> | 80% | 44,889 psi | 72% | 2520 fps | 98.6% |
| Hodgdon H322 | <<locked>> | 80% | 48,747 psi | 78% | 2467 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 49,240 psi | 79% | 2487 fps | 100% |
| Hodgdon H380 | <<locked>> | 82% | 36,521 psi | 59% | 2300 fps | 95.1% |
| Hodgdon H414 | <<locked>> | 96% | 46,253 psi | 74% | 2533 fps | 95.6% |
| Hodgdon H4350 | <<locked>> | 96% | 50,995 psi | 82% | 2556 fps | 95.1% |
| Hodgdon H4895 | <<locked>> | 80% | 40,886 psi | 66% | 2375 fps | 98.7% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 30,821 psi | 49% | 2201 fps | 95.5% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 36,767 psi | 59% | 2349 fps | 98.2% |
| Hodgdon Superformance | <<locked>> | 98% | 50,372 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% | 40,161 psi | 64% | 2379 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 36,289 psi | 58% | 2260 fps | 96.6% |
| IMR 4166 Enduron | <<locked>> | 86% | 46,876 psi | 75% | 2425 fps | 95.5% |
| IMR 4198 | <<locked>> | 80% | 50,270 psi | 81% | 2398 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 92% | 46,180 psi | 74% | 2444 fps | 95.2% |
| IMR 4831 | <<locked>> | 90% | 34,055 psi | 55% | 2293 fps | 95.1% |
| IMR 4895 | <<locked>> | 80% | 37,260 psi | 60% | 2333 fps | 97.5% |
| IMR 8208 XBR | <<locked>> | 80% | 42,554 psi | 68% | 2379 fps | 99.3% |
| Lovex D073.5 | <<locked>> | 80% | 47,993 psi | 77% | 2457 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 39,218 psi | 63% | 2349 fps | 99.8% |
| Lovex S060 | <<locked>> | 80% | 41,104 psi | 66% | 2313 fps | 98.3% |
| Lovex S062 | <<locked>> | 80% | 36,056 psi | 58% | 2267 fps | 98.3% |
| Lovex S065 | <<locked>> | 90% | 40,161 psi | 64% | 2346 fps | 95.3% |
| Lovex S070 | <<locked>> | 96% | 45,672 psi | 73% | 2464 fps | 95.6% |
| Norma 201 | <<locked>> | 80% | 39,885 psi | 64% | 2329 fps | 99% |
| Norma 202 | <<locked>> | 80% | 39,871 psi | 64% | 2336 fps | 100% |
| Norma 203B | <<locked>> | 80% | 35,795 psi | 57% | 2293 fps | 97% |
| Norma URP | <<locked>> | 90% | 35,752 psi | 57% | 2336 fps | 95.4% |
| Ramshot Big Game | <<locked>> | 80% | 35,215 psi | 56% | 2303 fps | 96.6% |
| Ramshot Hunter | <<locked>> | 96% | 42,409 psi | 68% | 2470 fps | 95.4% |
| Ramshot TAC | <<locked>> | 80% | 42,424 psi | 68% | 2375 fps | 96.1% |
| Ramshot Wild Boar | <<locked>> | 80% | 41,597 psi | 67% | 2395 fps | 98.3% |
| Ramshot X-Terminator | <<locked>> | 80% | 46,050 psi | 74% | 2421 fps | 98.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,397 psi | 42% | 1407 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 47,863 psi | 77% | 2454 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 42,322 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% | 31,082 psi | 50% | 2267 fps | 98% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 37,507 psi | 60% | 2402 fps | 95.7% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 40,712 psi | 65% | 2461 fps | 95.7% |
| Rottweil R 901 | <<locked>> | 80% | 43,700 psi | 70% | 2369 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 37,956 psi | 61% | 2287 fps | 98.6% |
| Rottweil R 903 | <<locked>> | 80% | 31,256 psi | 50% | 2201 fps | 96.3% |
| Rottweil R 907 | <<locked>> | 96% | 50,386 psi | 81% | 2510 fps | 95.7% |
| Shooters World Long Rifle | <<locked>> | 90% | 40,161 psi | 64% | 2346 fps | 95.3% |
| Shooters World Match Rifle | <<locked>> | 80% | 39,218 psi | 63% | 2349 fps | 99.8% |
| Shooters World Precision | <<locked>> | 80% | 36,056 psi | 58% | 2267 fps | 98.3% |
| Shooters World SW4350 | <<locked>> | 96% | 45,672 psi | 73% | 2464 fps | 95.6% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 50,517 psi | 81% | 2470 fps | 99.9% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 32,285 psi | 52% | 2241 fps | 95.5% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 50,705 psi | 81% | 2454 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 40,640 psi | 65% | 2352 fps | 96.3% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 39,088 psi | 63% | 2339 fps | 97.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 41,437 psi | 66% | 2290 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 34,171 psi | 55% | 2172 fps | 99.8% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 44,933 psi | 72% | 2392 fps | 95.1% |
| Somchem S321 | <<locked>> | 80% | 45,759 psi | 73% | 2451 fps | 99.8% |
| Somchem S335 | <<locked>> | 80% | 40,959 psi | 66% | 2297 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 40,190 psi | 64% | 2352 fps | 98% |
| Somchem S355 | <<locked>> | 80% | 32,358 psi | 52% | 2211 fps | 96.4% |
| Somchem S365 | <<locked>> | 86% | 28,166 psi | 45% | 2192 fps | 95.9% |
| Vihtavuori N130 | <<locked>> | 80% | 46,862 psi | 75% | 2352 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 41,611 psi | 67% | 2290 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 37,043 psi | 59% | 2274 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 37,768 psi | 61% | 2280 fps | 99.9% |
| Vihtavuori N150 | <<locked>> | 80% | 30,618 psi | 49% | 2152 fps | 97.2% |
| Vihtavuori N160 | <<locked>> | 88% | 35,186 psi | 56% | 2290 fps | 95% |
| Vihtavuori N530 | <<locked>> | 80% | 42,699 psi | 68% | 2375 fps | 99.4% |
| Vihtavuori N540 | <<locked>> | 80% | 36,318 psi | 58% | 2270 fps | 99.7% |
| Vihtavuori N550 | <<locked>> | 90% | 36,753 psi | 59% | 2343 fps | 95.5% |
| Vihtavuori N555 | <<locked>> | 96% | 32,387 psi | 52% | 2316 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 31,125 psi | 50% | 2175 fps | 95.6% |
| Winchester 748 | <<locked>> | 80% | 41,771 psi | 67% | 2411 fps | 99.7% |
| Winchester 760 | <<locked>> | 96% | 46,514 psi | 75% | 2536 fps | 95.6% |
| Winchester StaBALL Match | <<locked>> | 80% | 38,392 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 | Sierra Pro-Hunter. 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 | Sierra Pro-Hunter 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.