Load Specifications
Bullet Manufacturer:Prvi Partizan
Bullet Weight:250 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:1:12.5
Load data in caliber 8.5 x 55 Blaser with .338 | 250gr | Prvi Partizan HPBT bullet and 105 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% | 54,230 psi | 87% | 2326 fps | 100% |
| Accurate 2460 | <<locked>> | 84% | 56,130 psi | 90% | 2395 fps | 100% |
| Accurate 2495 | <<locked>> | 92% | 55,521 psi | 89% | 2385 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 54,230 psi | 87% | 2408 fps | 100% |
| Accurate 2700 | <<locked>> | 92% | 55,535 psi | 89% | 2392 fps | 97.2% |
| Accurate 4064 | <<locked>> | 94% | 55,230 psi | 89% | 2425 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 50,604 psi | 81% | 2451 fps | 99.4% |
| ADI AR 2206H | <<locked>> | 88% | 52,953 psi | 85% | 2411 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 94% | 54,027 psi | 87% | 2415 fps | 99.8% |
| ADI Benchmark 8208 | <<locked>> | 88% | 55,550 psi | 89% | 2415 fps | 100% |
| Alliant AR-Comp | <<locked>> | 88% | 56,014 psi | 90% | 2388 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 53,853 psi | 86% | 2461 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 92% | 55,840 psi | 90% | 2562 fps | 99.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 53,577 psi | 86% | 2431 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 82% | 53,911 psi | 86% | 2326 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 92% | 54,259 psi | 87% | 2451 fps | 99.9% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 49,719 psi | 80% | 2457 fps | 99.5% |
| Alliant Reloder-17 | <<locked>> | 98% | 53,737 psi | 86% | 2536 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 35,157 psi | 56% | 2231 fps | 97.9% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 38,682 psi | 62% | 2352 fps | 96.7% |
| Baschieri & Pellagri 106 | <<locked>> | 82% | 55,825 psi | 90% | 2316 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 90% | 56,318 psi | 90% | 2477 fps | 99.8% |
| Bofors RP3 | <<locked>> | 94% | 53,853 psi | 86% | 2444 fps | 100% |
| Bofors RP7 | <<locked>> | 98% | 54,505 psi | 87% | 2418 fps | 97.3% |
| Hodgdon Benchmark | <<locked>> | 86% | 54,404 psi | 87% | 2359 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 88% | 54,636 psi | 88% | 2444 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 84% | 52,910 psi | 85% | 2484 fps | 99.8% |
| Hodgdon H322 | <<locked>> | 84% | 56,376 psi | 90% | 2405 fps | 100% |
| Hodgdon H335 | <<locked>> | 82% | 53,766 psi | 86% | 2388 fps | 100% |
| Hodgdon H380 | <<locked>> | 94% | 55,172 psi | 88% | 2457 fps | 99.5% |
| Hodgdon H414ᴾ | <<locked>> | 100% | 53,940 psi | 86% | 2497 fps | 97.9% |
| Hodgdon H4350 | <<locked>> | 98% | 55,274 psi | 89% | 2464 fps | 96.8% |
| Hodgdon H4895 | <<locked>> | 88% | 53,490 psi | 86% | 2421 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 45,788 psi | 73% | 2352 fps | 99.7% |
| Hodgdon LEVERevolution | <<locked>> | 92% | 55,840 psi | 90% | 2497 fps | 100% |
| Hodgdon Superformanceᴾ | <<locked>> | 100% | 55,201 psi | 89% | 2533 fps | 97.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,230 psi | 56% | 1434 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 54,839 psi | 88% | 2425 fps | 100% |
| IMR 3031 | <<locked>> | 88% | 53,316 psi | 85% | 2408 fps | 100% |
| IMR 4064 | <<locked>> | 92% | 53,592 psi | 86% | 2398 fps | 99.8% |
| IMR 4166 Enduron | <<locked>> | 90% | 53,998 psi | 87% | 2382 fps | 97.7% |
| IMR 4198 | <<locked>> | 82% | 54,099 psi | 87% | 2287 fps | 100% |
| IMR 4350ᴾ | <<locked>> | 100% | 50,865 psi | 82% | 2392 fps | 96.7% |
| IMR 4451 Enduron | <<locked>> | 98% | 56,362 psi | 90% | 2444 fps | 98% |
| IMR 4831ᴾ | <<locked>> | 100% | 48,269 psi | 77% | 2402 fps | 99.2% |
| IMR 4895 | <<locked>> | 92% | 55,608 psi | 89% | 2477 fps | 100% |
| IMR 8208 XBR | <<locked>> | 88% | 55,550 psi | 89% | 2415 fps | 100% |
| Lovex D073.5 | <<locked>> | 84% | 55,767 psi | 89% | 2402 fps | 100% |
| Lovex D073.6 | <<locked>> | 90% | 55,825 psi | 90% | 2434 fps | 100% |
| Lovex S060 | <<locked>> | 90% | 56,405 psi | 90% | 2392 fps | 100% |
| Lovex S062 | <<locked>> | 92% | 53,185 psi | 85% | 2395 fps | 100% |
| Lovex S065ᴾ | <<locked>> | 100% | 55,347 psi | 89% | 2438 fps | 99% |
| Lovex S070ᴾ | <<locked>> | 100% | 52,620 psi | 84% | 2421 fps | 97.8% |
| Norma 201 | <<locked>> | 90% | 55,288 psi | 89% | 2411 fps | 100% |
| Norma 202 | <<locked>> | 90% | 55,521 psi | 89% | 2408 fps | 100% |
| Norma 203B | <<locked>> | 92% | 53,403 psi | 86% | 2441 fps | 100% |
| Norma URPᴾ | <<locked>> | 100% | 50,125 psi | 80% | 2441 fps | 99.3% |
| Ramshot Big Game | <<locked>> | 92% | 53,708 psi | 86% | 2464 fps | 99.9% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 49,255 psi | 79% | 2438 fps | 97.9% |
| Ramshot TAC | <<locked>> | 88% | 55,883 psi | 90% | 2434 fps | 99.1% |
| Ramshot Wild Boar | <<locked>> | 88% | 55,477 psi | 89% | 2451 fps | 100% |
| Ramshot X-Terminator | <<locked>> | 84% | 53,330 psi | 86% | 2375 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,708 psi | 57% | 1470 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 55,274 psi | 89% | 2398 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 94% | 55,738 psi | 89% | 2441 fps | 98.5% |
| ReloadSwiss RS 52 | <<locked>> | 90% | 54,302 psi | 87% | 2507 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 96% | 53,592 psi | 86% | 2536 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 50,024 psi | 80% | 2470 fps | 99.2% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 50,691 psi | 81% | 2493 fps | 98.9% |
| Rottweil R 901 | <<locked>> | 88% | 56,188 psi | 90% | 2388 fps | 100% |
| Rottweil R 902 | <<locked>> | 92% | 55,492 psi | 89% | 2405 fps | 100% |
| Rottweil R 903 | <<locked>> | 96% | 53,722 psi | 86% | 2438 fps | 100% |
| Rottweil R 907 | <<locked>> | 98% | 54,505 psi | 87% | 2418 fps | 97.3% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 55,347 psi | 89% | 2438 fps | 99% |
| Shooters World Match Rifle | <<locked>> | 90% | 55,825 psi | 90% | 2434 fps | 100% |
| Shooters World Precision | <<locked>> | 92% | 53,185 psi | 85% | 2395 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 52,620 psi | 84% | 2421 fps | 97.8% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 55,042 psi | 88% | 2375 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 96% | 55,259 psi | 89% | 2490 fps | 100% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 54,824 psi | 88% | 2343 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 88% | 54,288 psi | 87% | 2415 fps | 99.3% |
| SNPE Vectan SP 9 | <<locked>> | 90% | 54,665 psi | 88% | 2434 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 53,693 psi | 86% | 2313 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 53,388 psi | 86% | 2313 fps | 100% |
| SNPE Vectan Tubal 7000ᴾ | <<locked>> | 100% | 56,217 psi | 90% | 2398 fps | 98% |
| Somchem S321 | <<locked>> | 84% | 53,287 psi | 85% | 2402 fps | 100% |
| Somchem S335 | <<locked>> | 90% | 56,318 psi | 90% | 2352 fps | 100% |
| Somchem S341 | <<locked>> | 88% | 53,635 psi | 86% | 2408 fps | 99.9% |
| Somchem S355 | <<locked>> | 96% | 54,230 psi | 87% | 2434 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 44,730 psi | 72% | 2398 fps | 100% |
| Vihtavuori N130 | <<locked>> | 84% | 53,766 psi | 86% | 2283 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 53,838 psi | 86% | 2300 fps | 100% |
| Vihtavuori N135 | <<locked>> | 92% | 55,100 psi | 88% | 2372 fps | 100% |
| Vihtavuori N140 | <<locked>> | 92% | 55,970 psi | 90% | 2388 fps | 100% |
| Vihtavuori N150 | <<locked>> | 98% | 55,651 psi | 89% | 2415 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 52,721 psi | 85% | 2438 fps | 99.4% |
| Vihtavuori N530 | <<locked>> | 88% | 56,289 psi | 90% | 2415 fps | 100% |
| Vihtavuori N540 | <<locked>> | 92% | 54,099 psi | 87% | 2392 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 51,895 psi | 83% | 2448 fps | 99.3% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 37,608 psi | 60% | 2293 fps | 97.8% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 53,388 psi | 86% | 2425 fps | 100% |
| Winchester 748 | <<locked>> | 88% | 55,811 psi | 89% | 2457 fps | 100% |
| Winchester 760ᴾ | <<locked>> | 100% | 54,259 psi | 87% | 2500 fps | 98% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 31,372 psi | 50% | 2215 fps | 97.1% |
| Winchester StaBALL Match | <<locked>> | 90% | 54,404 psi | 87% | 2441 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% | 45,020 psi | 72% | 2211 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 49,153 psi | 79% | 2310 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 37,608 psi | 60% | 2149 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 44,280 psi | 71% | 2277 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 45,629 psi | 73% | 2251 fps | 95.1% |
| Accurate 4064 | <<locked>> | 80% | 35,563 psi | 57% | 2142 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 31,357 psi | 50% | 2119 fps | 95% |
| ADI AR 2206H | <<locked>> | 80% | 41,408 psi | 66% | 2238 fps | 98.9% |
| ADI AR 2208 | <<locked>> | 80% | 35,331 psi | 57% | 2113 fps | 96.9% |
| ADI Benchmark 8208 | <<locked>> | 80% | 43,439 psi | 70% | 2244 fps | 99.8% |
| Alliant AR-Comp | <<locked>> | 80% | 43,091 psi | 69% | 2231 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 50,589 psi | 81% | 2415 fps | 100% |
| Alliant Power Pro 2000-MR | 48.3 gr | 80% | 37,434 psi | 60% | 2260 fps | 97.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 34,679 psi | 56% | 2133 fps | 98.3% |
| Alliant Reloder-10x | <<locked>> | 80% | 50,720 psi | 81% | 2287 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 37,217 psi | 60% | 2182 fps | 97.6% |
| Alliant Reloder-16 | <<locked>> | 86% | 32,489 psi | 52% | 2133 fps | 95.2% |
| Alliant Reloder-17 | <<locked>> | 80% | 29,776 psi | 48% | 2096 fps | 96% |
| Alliant Reloder-23 | <<locked>> | 94% | 29,472 psi | 47% | 2093 fps | 95.6% |
| Alliant Reloder-26 | <<locked>> | 98% | 36,172 psi | 58% | 2300 fps | 95.7% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 52,446 psi | 84% | 2277 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 40,422 psi | 65% | 2241 fps | 97.9% |
| Bofors RP3 | <<locked>> | 80% | 33,982 psi | 54% | 2133 fps | 98.3% |
| Bofors RP7 | <<locked>> | 92% | 45,179 psi | 72% | 2280 fps | 95.3% |
| Hodgdon Benchmark | <<locked>> | 80% | 45,324 psi | 73% | 2234 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 41,901 psi | 67% | 2267 fps | 99.9% |
| Hodgdon CFE223 | <<locked>> | 80% | 45,934 psi | 74% | 2382 fps | 99.3% |
| Hodgdon H322 | <<locked>> | 80% | 49,777 psi | 80% | 2326 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 50,343 psi | 81% | 2346 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 34,998 psi | 56% | 2133 fps | 95.6% |
| Hodgdon H414 | <<locked>> | 92% | 41,727 psi | 67% | 2310 fps | 95.2% |
| Hodgdon H4350 | <<locked>> | 94% | 48,718 psi | 78% | 2372 fps | 95.4% |
| Hodgdon H4895 | <<locked>> | 80% | 41,713 psi | 67% | 2247 fps | 99.3% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 27,876 psi | 45% | 2001 fps | 95.2% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 37,521 psi | 60% | 2221 fps | 99% |
| Hodgdon Superformance | <<locked>> | 94% | 44,585 psi | 71% | 2372 fps | 95.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,252 psi | 42% | 1280 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 40,219 psi | 64% | 2208 fps | 99% |
| IMR 3031 | <<locked>> | 80% | 41,162 psi | 66% | 2244 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 37,057 psi | 59% | 2139 fps | 97.6% |
| IMR 4166 Enduron | <<locked>> | 82% | 42,119 psi | 68% | 2201 fps | 95.1% |
| IMR 4198 | <<locked>> | 80% | 51,111 psi | 82% | 2251 fps | 100% |
| IMR 4350 | <<locked>> | 96% | 45,136 psi | 72% | 2303 fps | 95.3% |
| IMR 4451 Enduron | <<locked>> | 90% | 44,454 psi | 71% | 2270 fps | 95.7% |
| IMR 4831 | <<locked>> | 88% | 32,721 psi | 52% | 2133 fps | 95.6% |
| IMR 4895 | <<locked>> | 80% | 38,087 psi | 61% | 2208 fps | 98.4% |
| IMR 8208 XBR | <<locked>> | 80% | 43,439 psi | 70% | 2244 fps | 99.8% |
| Lovex D073.5 | <<locked>> | 80% | 48,834 psi | 78% | 2316 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 40,132 psi | 64% | 2221 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 41,916 psi | 67% | 2185 fps | 99% |
| Lovex S062 | <<locked>> | 80% | 36,883 psi | 59% | 2146 fps | 99% |
| Lovex S065 | <<locked>> | 88% | 38,638 psi | 62% | 2182 fps | 95.7% |
| Lovex S070 | <<locked>> | 92% | 41,147 psi | 66% | 2244 fps | 95.2% |
| Norma 201 | <<locked>> | 80% | 40,582 psi | 65% | 2198 fps | 99.5% |
| Norma 202 | <<locked>> | 80% | 40,857 psi | 66% | 2208 fps | 100% |
| Norma 203B | <<locked>> | 80% | 36,579 psi | 59% | 2172 fps | 98% |
| Norma URP | <<locked>> | 86% | 32,242 psi | 52% | 2126 fps | 95% |
| Ramshot Big Game | <<locked>> | 80% | 36,013 psi | 58% | 2185 fps | 97.6% |
| Ramshot Hunter | <<locked>> | 92% | 38,174 psi | 61% | 2251 fps | 95% |
| Ramshot TAC | <<locked>> | 80% | 43,366 psi | 70% | 2251 fps | 97.2% |
| Ramshot Wild Boar | <<locked>> | 80% | 42,540 psi | 68% | 2267 fps | 99% |
| Ramshot X-Terminator | <<locked>> | 80% | 46,978 psi | 75% | 2287 fps | 99.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,556 psi | 43% | 1312 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 48,704 psi | 78% | 2313 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 40,480 psi | 65% | 2211 fps | 95.4% |
| ReloadSwiss RS 52 | 46.8 gr | 80% | 38,667 psi | 62% | 2267 fps | 98% |
| ReloadSwiss RS 60 | 47.5 gr | 80% | 31,705 psi | 51% | 2156 fps | 99% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 33,533 psi | 54% | 2182 fps | 95.3% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 36,463 psi | 58% | 2238 fps | 95.2% |
| Rottweil R 901 | <<locked>> | 80% | 44,469 psi | 71% | 2231 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 38,754 psi | 62% | 2159 fps | 99.3% |
| Rottweil R 903 | <<locked>> | 80% | 31,995 psi | 51% | 2083 fps | 97.4% |
| Rottweil R 907 | <<locked>> | 92% | 45,179 psi | 72% | 2280 fps | 95.3% |
| Shooters World Long Rifle | <<locked>> | 88% | 38,638 psi | 62% | 2182 fps | 95.7% |
| Shooters World Match Rifle | <<locked>> | 80% | 40,132 psi | 64% | 2221 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 36,883 psi | 59% | 2146 fps | 99% |
| Shooters World SW4350 | <<locked>> | 92% | 41,147 psi | 66% | 2244 fps | 95.2% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 51,488 psi | 83% | 2329 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 33,040 psi | 53% | 2126 fps | 96.8% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 51,488 psi | 83% | 2303 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 41,350 psi | 66% | 2224 fps | 97.3% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 39,900 psi | 64% | 2211 fps | 98.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 42,090 psi | 67% | 2156 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 34,766 psi | 56% | 2047 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 43,047 psi | 69% | 2218 fps | 95.5% |
| Somchem S321 | <<locked>> | 80% | 46,804 psi | 75% | 2316 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 41,640 psi | 67% | 2162 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 41,162 psi | 66% | 2228 fps | 98.8% |
| Somchem S355 | <<locked>> | 80% | 33,011 psi | 53% | 2090 fps | 97.4% |
| Somchem S365 | <<locked>> | 82% | 25,425 psi | 41% | 1991 fps | 95.5% |
| Vihtavuori N130 | <<locked>> | 80% | 47,587 psi | 76% | 2208 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 42,308 psi | 68% | 2152 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 37,797 psi | 61% | 2142 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 38,566 psi | 62% | 2152 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 31,314 psi | 50% | 2037 fps | 98.2% |
| Vihtavuori N160 | <<locked>> | 86% | 33,736 psi | 54% | 2126 fps | 95.5% |
| Vihtavuori N530 | <<locked>> | 80% | 43,439 psi | 70% | 2241 fps | 99.8% |
| Vihtavuori N540 | <<locked>> | 80% | 37,101 psi | 59% | 2146 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 86% | 33,069 psi | 53% | 2133 fps | 95.1% |
| Vihtavuori N555 | <<locked>> | 94% | 31,169 psi | 50% | 2159 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 28,007 psi | 45% | 1975 fps | 95.2% |
| Winchester 748 | <<locked>> | 80% | 42,612 psi | 68% | 2280 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 41,727 psi | 67% | 2310 fps | 95.2% |
| Winchester StaBALL HD | <<locked>> | 98% | 29,414 psi | 47% | 2159 fps | 95.9% |
| Winchester StaBALL Match | <<locked>> | 80% | 39,204 psi | 63% | 2215 fps | 99% |
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 105 powders for 8.5 x 55 Blaser loaded with the .338 | 250gr | Prvi Partizan HPBT. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,562 fps; across all powders the maximum-charge window runs from 1,434 fps to 2,562 fps. Accurate 4350 gives the best case fill at 100 %, and 105 of the 105 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (430 MPa), the top charges use 50–90 %, leaving at least 10 % headroom. The 250.0 gr projectile in 0.338" calls for a 1:12.5 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 | 250gr | Prvi Partizan HPBT 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.