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 FMJ-BT bullet and 106 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% | 54,012 psi | 87% | 2320 fps | 100% |
| Accurate 2460 | <<locked>> | 84% | 55,927 psi | 90% | 2388 fps | 100% |
| Accurate 2495 | <<locked>> | 92% | 55,317 psi | 89% | 2382 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 53,693 psi | 86% | 2398 fps | 100% |
| Accurate 2700 | <<locked>> | 92% | 55,347 psi | 89% | 2385 fps | 97.1% |
| Accurate 4064 | <<locked>> | 94% | 54,998 psi | 88% | 2421 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 50,444 psi | 81% | 2444 fps | 99.3% |
| Accurate LT-30 | <<locked>> | 82% | 56,304 psi | 90% | 2306 fps | 100% |
| ADI AR 2206H | <<locked>> | 90% | 56,376 psi | 90% | 2454 fps | 100% |
| ADI AR 2208 | <<locked>> | 94% | 53,867 psi | 86% | 2408 fps | 99.8% |
| ADI Benchmark 8208 | <<locked>> | 88% | 55,361 psi | 89% | 2408 fps | 100% |
| Alliant AR-Comp | <<locked>> | 88% | 55,767 psi | 89% | 2382 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 53,940 psi | 86% | 2457 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 92% | 55,680 psi | 89% | 2559 fps | 99.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 53,403 psi | 86% | 2428 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 82% | 53,693 psi | 86% | 2320 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 92% | 54,085 psi | 87% | 2448 fps | 99.9% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 49,284 psi | 79% | 2448 fps | 99.4% |
| Alliant Reloder-17 | <<locked>> | 98% | 53,563 psi | 86% | 2533 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 35,056 psi | 56% | 2224 fps | 97.9% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 38,363 psi | 62% | 2346 fps | 96.5% |
| Baschieri & Pellagri 106 | <<locked>> | 82% | 55,651 psi | 89% | 2310 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 90% | 55,840 psi | 90% | 2470 fps | 99.8% |
| Bofors RP3 | <<locked>> | 94% | 53,621 psi | 86% | 2441 fps | 100% |
| Bofors RP7 | <<locked>> | 98% | 54,389 psi | 87% | 2411 fps | 97.2% |
| Hodgdon Benchmark | <<locked>> | 86% | 54,215 psi | 87% | 2356 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 88% | 54,447 psi | 87% | 2441 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 86% | 56,420 psi | 90% | 2526 fps | 100% |
| Hodgdon H322 | <<locked>> | 84% | 56,173 psi | 90% | 2402 fps | 100% |
| Hodgdon H335 | <<locked>> | 82% | 53,577 psi | 86% | 2385 fps | 100% |
| Hodgdon H380 | <<locked>> | 94% | 55,042 psi | 88% | 2454 fps | 99.4% |
| Hodgdon H414ᴾ | <<locked>> | 100% | 53,766 psi | 86% | 2493 fps | 97.9% |
| Hodgdon H4350 | <<locked>> | 98% | 55,085 psi | 88% | 2461 fps | 96.7% |
| Hodgdon H4895 | <<locked>> | 88% | 53,287 psi | 85% | 2418 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 45,629 psi | 73% | 2349 fps | 99.7% |
| Hodgdon LEVERevolution | <<locked>> | 92% | 55,651 psi | 89% | 2490 fps | 100% |
| Hodgdon Superformanceᴾ | <<locked>> | 100% | 54,795 psi | 88% | 2523 fps | 97.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,143 psi | 56% | 1430 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 54,665 psi | 88% | 2421 fps | 100% |
| IMR 3031 | <<locked>> | 88% | 53,113 psi | 85% | 2402 fps | 100% |
| IMR 4064 | <<locked>> | 92% | 53,417 psi | 86% | 2395 fps | 99.8% |
| IMR 4166 Enduron | <<locked>> | 90% | 53,838 psi | 86% | 2379 fps | 97.7% |
| IMR 4198 | <<locked>> | 82% | 54,157 psi | 87% | 2287 fps | 100% |
| IMR 4350ᴾ | <<locked>> | 100% | 50,778 psi | 81% | 2388 fps | 96.6% |
| IMR 4451 Enduron | <<locked>> | 98% | 56,173 psi | 90% | 2438 fps | 98% |
| IMR 4831ᴾ | <<locked>> | 100% | 47,834 psi | 77% | 2395 fps | 99.1% |
| IMR 4895 | <<locked>> | 92% | 55,434 psi | 89% | 2470 fps | 100% |
| IMR 8208 XBR | <<locked>> | 88% | 55,361 psi | 89% | 2408 fps | 100% |
| Lovex D073.5 | <<locked>> | 84% | 55,550 psi | 89% | 2398 fps | 100% |
| Lovex D073.6 | <<locked>> | 90% | 55,608 psi | 89% | 2431 fps | 100% |
| Lovex S060 | <<locked>> | 90% | 56,188 psi | 90% | 2388 fps | 100% |
| Lovex S062 | <<locked>> | 94% | 56,304 psi | 90% | 2431 fps | 100% |
| Lovex S065ᴾ | <<locked>> | 100% | 55,158 psi | 88% | 2434 fps | 98.9% |
| Lovex S070ᴾ | <<locked>> | 100% | 52,518 psi | 84% | 2418 fps | 97.7% |
| Norma 201 | <<locked>> | 90% | 55,100 psi | 88% | 2405 fps | 100% |
| Norma 202 | <<locked>> | 90% | 55,317 psi | 89% | 2405 fps | 100% |
| Norma 203B | <<locked>> | 92% | 53,243 psi | 85% | 2434 fps | 100% |
| Norma URPᴾ | <<locked>> | 100% | 49,966 psi | 80% | 2438 fps | 99.2% |
| Ramshot Big Game | <<locked>> | 92% | 53,490 psi | 86% | 2461 fps | 99.9% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 48,892 psi | 78% | 2431 fps | 97.8% |
| Ramshot TAC | <<locked>> | 88% | 55,724 psi | 89% | 2431 fps | 99.1% |
| Ramshot Wild Boar | <<locked>> | 88% | 55,013 psi | 88% | 2444 fps | 100% |
| Ramshot X-Terminator | <<locked>> | 84% | 53,156 psi | 85% | 2372 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,636 psi | 57% | 1467 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 55,071 psi | 88% | 2395 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 94% | 55,550 psi | 89% | 2438 fps | 98.5% |
| ReloadSwiss RS 52 | <<locked>> | 90% | 54,114 psi | 87% | 2503 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 96% | 53,447 psi | 86% | 2533 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 49,893 psi | 80% | 2467 fps | 99.1% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 50,589 psi | 81% | 2487 fps | 98.9% |
| Rottweil R 901 | <<locked>> | 88% | 56,304 psi | 90% | 2388 fps | 100% |
| Rottweil R 902 | <<locked>> | 92% | 55,288 psi | 89% | 2398 fps | 100% |
| Rottweil R 903 | <<locked>> | 96% | 53,490 psi | 86% | 2431 fps | 100% |
| Rottweil R 907 | <<locked>> | 98% | 54,389 psi | 87% | 2411 fps | 97.2% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 55,158 psi | 88% | 2434 fps | 98.9% |
| Shooters World Match Rifle | <<locked>> | 90% | 55,608 psi | 89% | 2431 fps | 100% |
| Shooters World Precision | <<locked>> | 94% | 56,304 psi | 90% | 2431 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 52,518 psi | 84% | 2418 fps | 97.7% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 54,853 psi | 88% | 2369 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 96% | 55,085 psi | 88% | 2487 fps | 100% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 54,607 psi | 88% | 2339 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 88% | 54,157 psi | 87% | 2411 fps | 99.3% |
| SNPE Vectan SP 9 | <<locked>> | 90% | 54,505 psi | 87% | 2431 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 53,548 psi | 86% | 2310 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 53,214 psi | 85% | 2310 fps | 100% |
| SNPE Vectan Tubal 7000ᴾ | <<locked>> | 100% | 55,724 psi | 89% | 2392 fps | 97.9% |
| Somchem S321 | <<locked>> | 84% | 53,113 psi | 85% | 2398 fps | 100% |
| Somchem S335 | <<locked>> | 90% | 56,130 psi | 90% | 2349 fps | 100% |
| Somchem S341 | <<locked>> | 88% | 53,417 psi | 86% | 2402 fps | 99.9% |
| Somchem S355 | <<locked>> | 96% | 54,070 psi | 87% | 2431 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 44,556 psi | 71% | 2395 fps | 100% |
| Vihtavuori N130 | <<locked>> | 84% | 53,548 psi | 86% | 2280 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 53,650 psi | 86% | 2297 fps | 100% |
| Vihtavuori N135 | <<locked>> | 92% | 54,868 psi | 88% | 2369 fps | 100% |
| Vihtavuori N140 | <<locked>> | 92% | 55,796 psi | 89% | 2385 fps | 100% |
| Vihtavuori N150 | <<locked>> | 98% | 55,477 psi | 89% | 2411 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 52,576 psi | 84% | 2434 fps | 99.4% |
| Vihtavuori N530 | <<locked>> | 88% | 56,072 psi | 90% | 2411 fps | 100% |
| Vihtavuori N540 | <<locked>> | 92% | 53,882 psi | 86% | 2388 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 51,416 psi | 82% | 2441 fps | 99.2% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 37,434 psi | 60% | 2287 fps | 97.8% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 53,330 psi | 86% | 2421 fps | 100% |
| Winchester 748 | <<locked>> | 88% | 55,637 psi | 89% | 2454 fps | 100% |
| Winchester 760ᴾ | <<locked>> | 100% | 53,766 psi | 86% | 2493 fps | 97.9% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 31,111 psi | 50% | 2205 fps | 96.9% |
| Winchester StaBALL Match | <<locked>> | 90% | 54,186 psi | 87% | 2438 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% | 45,034 psi | 72% | 2208 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 48,936 psi | 78% | 2303 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 37,376 psi | 60% | 2142 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 44,063 psi | 71% | 2270 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 45,411 psi | 73% | 2244 fps | 95% |
| Accurate 4064 | <<locked>> | 80% | 35,389 psi | 57% | 2139 fps | 100% |
| Accurate 4350 | <<locked>> | 88% | 33,359 psi | 53% | 2162 fps | 95.8% |
| Accurate LT-30 | <<locked>> | 80% | 53,243 psi | 85% | 2270 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 41,191 psi | 66% | 2231 fps | 98.8% |
| ADI AR 2208 | <<locked>> | 80% | 35,172 psi | 56% | 2106 fps | 96.8% |
| ADI Benchmark 8208 | <<locked>> | 80% | 43,221 psi | 69% | 2241 fps | 99.7% |
| Alliant AR-Comp | <<locked>> | 80% | 43,134 psi | 69% | 2231 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 50,386 psi | 81% | 2411 fps | 100% |
| Alliant Power Pro 2000-MR | 48.1 gr | 80% | 37,275 psi | 60% | 2254 fps | 97.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 34,490 psi | 55% | 2126 fps | 98.2% |
| Alliant Reloder-10x | <<locked>> | 80% | 50,705 psi | 81% | 2283 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 37,043 psi | 59% | 2178 fps | 97.6% |
| Alliant Reloder-16 | <<locked>> | 86% | 32,329 psi | 52% | 2126 fps | 95% |
| Alliant Reloder-17 | <<locked>> | 80% | 29,631 psi | 48% | 2093 fps | 95.9% |
| Alliant Reloder-23 | <<locked>> | 94% | 29,356 psi | 47% | 2090 fps | 95.5% |
| Alliant Reloder-26 | <<locked>> | 98% | 35,897 psi | 58% | 2293 fps | 95.6% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 52,272 psi | 84% | 2274 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 40,248 psi | 65% | 2238 fps | 97.8% |
| Bofors RP3 | <<locked>> | 80% | 33,837 psi | 54% | 2126 fps | 98.2% |
| Bofors RP7 | <<locked>> | 92% | 45,034 psi | 72% | 2277 fps | 95.2% |
| Hodgdon Benchmark | <<locked>> | 80% | 45,150 psi | 72% | 2231 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 41,713 psi | 67% | 2260 fps | 99.8% |
| Hodgdon CFE223 | <<locked>> | 80% | 45,730 psi | 73% | 2379 fps | 99.2% |
| Hodgdon H322 | <<locked>> | 80% | 49,530 psi | 79% | 2320 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 50,140 psi | 80% | 2343 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 34,853 psi | 56% | 2129 fps | 95.5% |
| Hodgdon H414 | <<locked>> | 92% | 41,336 psi | 66% | 2300 fps | 95.1% |
| Hodgdon H4350 | <<locked>> | 94% | 48,530 psi | 78% | 2365 fps | 95.3% |
| Hodgdon H4895 | <<locked>> | 80% | 41,553 psi | 67% | 2241 fps | 99.3% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 27,746 psi | 44% | 1998 fps | 95.1% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 37,333 psi | 60% | 2218 fps | 98.9% |
| Hodgdon Superformance | <<locked>> | 94% | 44,512 psi | 71% | 2369 fps | 95.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,150 psi | 42% | 1276 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 40,045 psi | 64% | 2205 fps | 99% |
| IMR 3031 | <<locked>> | 80% | 40,930 psi | 66% | 2238 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 36,898 psi | 59% | 2136 fps | 97.6% |
| IMR 4166 Enduron | <<locked>> | 82% | 41,945 psi | 67% | 2195 fps | 95% |
| IMR 4198 | <<locked>> | 80% | 51,140 psi | 82% | 2251 fps | 100% |
| IMR 4350 | <<locked>> | 96% | 45,020 psi | 72% | 2300 fps | 95.3% |
| IMR 4451 Enduron | <<locked>> | 90% | 44,309 psi | 71% | 2267 fps | 95.6% |
| IMR 4831 | <<locked>> | 88% | 32,561 psi | 52% | 2129 fps | 95.5% |
| IMR 4895 | <<locked>> | 80% | 37,927 psi | 61% | 2205 fps | 98.3% |
| IMR 8208 XBR | <<locked>> | 80% | 43,221 psi | 69% | 2241 fps | 99.7% |
| Lovex D073.5 | <<locked>> | 80% | 48,631 psi | 78% | 2310 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 39,972 psi | 64% | 2218 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 41,698 psi | 67% | 2182 fps | 98.9% |
| Lovex S062 | <<locked>> | 80% | 36,709 psi | 59% | 2139 fps | 99% |
| Lovex S065 | <<locked>> | 88% | 38,479 psi | 62% | 2175 fps | 95.7% |
| Lovex S070 | <<locked>> | 92% | 40,973 psi | 66% | 2241 fps | 95.1% |
| Norma 201 | <<locked>> | 80% | 40,393 psi | 65% | 2192 fps | 99.5% |
| Norma 202 | <<locked>> | 80% | 40,625 psi | 65% | 2201 fps | 100% |
| Norma 203B | <<locked>> | 80% | 36,434 psi | 58% | 2169 fps | 97.9% |
| Norma URP | <<locked>> | 88% | 34,156 psi | 55% | 2165 fps | 95.8% |
| Ramshot Big Game | <<locked>> | 80% | 35,897 psi | 58% | 2178 fps | 97.6% |
| Ramshot Hunter | <<locked>> | 94% | 40,640 psi | 65% | 2293 fps | 95.8% |
| Ramshot TAC | <<locked>> | 80% | 43,207 psi | 69% | 2247 fps | 97.1% |
| Ramshot Wild Boar | <<locked>> | 80% | 42,366 psi | 68% | 2264 fps | 99% |
| Ramshot X-Terminator | <<locked>> | 80% | 46,789 psi | 75% | 2283 fps | 99.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,455 psi | 42% | 1309 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 48,472 psi | 78% | 2310 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 40,335 psi | 65% | 2208 fps | 95.4% |
| ReloadSwiss RS 52 | 46.6 gr | 80% | 38,450 psi | 62% | 2260 fps | 98% |
| ReloadSwiss RS 60 | 47.3 gr | 80% | 31,560 psi | 51% | 2149 fps | 99% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 33,388 psi | 54% | 2178 fps | 95.2% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 36,376 psi | 58% | 2234 fps | 95.1% |
| Rottweil R 901 | <<locked>> | 80% | 44,469 psi | 71% | 2231 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 38,551 psi | 62% | 2152 fps | 99.2% |
| Rottweil R 903 | <<locked>> | 80% | 31,821 psi | 51% | 2080 fps | 97.3% |
| Rottweil R 907 | <<locked>> | 92% | 45,034 psi | 72% | 2277 fps | 95.2% |
| Shooters World Long Rifle | <<locked>> | 88% | 38,479 psi | 62% | 2175 fps | 95.7% |
| Shooters World Match Rifle | <<locked>> | 80% | 39,972 psi | 64% | 2218 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 36,709 psi | 59% | 2139 fps | 99% |
| Shooters World SW4350 | <<locked>> | 92% | 40,973 psi | 66% | 2241 fps | 95.1% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 51,285 psi | 82% | 2326 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 32,895 psi | 53% | 2123 fps | 96.7% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 51,517 psi | 83% | 2303 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 41,176 psi | 66% | 2221 fps | 97.2% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 39,769 psi | 64% | 2208 fps | 98.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 42,090 psi | 67% | 2156 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 34,795 psi | 56% | 2047 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 42,902 psi | 69% | 2215 fps | 95.4% |
| Somchem S321 | <<locked>> | 80% | 46,615 psi | 75% | 2310 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 41,423 psi | 66% | 2156 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 40,988 psi | 66% | 2221 fps | 98.7% |
| Somchem S355 | <<locked>> | 80% | 32,837 psi | 53% | 2087 fps | 97.4% |
| Somchem S365 | <<locked>> | 82% | 25,324 psi | 41% | 1985 fps | 95.4% |
| Vihtavuori N130 | <<locked>> | 80% | 47,630 psi | 76% | 2208 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 42,308 psi | 68% | 2152 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 37,826 psi | 61% | 2142 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 38,348 psi | 61% | 2146 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 31,140 psi | 50% | 2034 fps | 98.1% |
| Vihtavuori N160 | <<locked>> | 86% | 33,576 psi | 54% | 2123 fps | 95.4% |
| Vihtavuori N530 | <<locked>> | 80% | 43,221 psi | 69% | 2238 fps | 99.8% |
| Vihtavuori N540 | <<locked>> | 80% | 36,912 psi | 59% | 2142 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 86% | 32,924 psi | 53% | 2126 fps | 95% |
| Vihtavuori N555 | <<locked>> | 94% | 31,053 psi | 50% | 2152 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 27,891 psi | 45% | 1972 fps | 95.1% |
| Winchester 748 | <<locked>> | 80% | 42,395 psi | 68% | 2274 fps | 99.9% |
| Winchester 760 | <<locked>> | 92% | 41,568 psi | 67% | 2303 fps | 95.1% |
| Winchester StaBALL HD | <<locked>> | 98% | 29,327 psi | 47% | 2152 fps | 95.8% |
| Winchester StaBALL Match | <<locked>> | 80% | 39,044 psi | 63% | 2211 fps | 98.9% |
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 | 250gr | Prvi Partizan FMJ-BT. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,559 fps; across all powders the maximum-charge window runs from 1,430 fps to 2,559 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 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 FMJ-BT 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.