Load Specifications
Bullet Manufacturer:Woodleigh
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:1:16.5
Load data in caliber 8.5 x 55 Blaser with .338 | 250gr | Woodleigh PP SN bullet and 102 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 Hodgdon Superformance.
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>> | 84% | 54,041 psi | 87% | 2346 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 55,825 psi | 90% | 2415 fps | 100% |
| Accurate 2495 | <<locked>> | 90% | 55,912 psi | 90% | 2411 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 55,912 psi | 90% | 2457 fps | 100% |
| Accurate 2700 | <<locked>> | 94% | 56,072 psi | 90% | 2421 fps | 97.7% |
| Accurate 3100ᴾ | <<locked>> | 100% | 39,276 psi | 63% | 2292 fps | 96.3% |
| Accurate 4064 | <<locked>> | 92% | 55,579 psi | 89% | 2451 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 55,158 psi | 88% | 2533 fps | 99.9% |
| ADI AR 2206H | <<locked>> | 88% | 56,289 psi | 90% | 2489 fps | 100% |
| ADI AR 2208 | <<locked>> | 92% | 53,867 psi | 86% | 2446 fps | 99.9% |
| ADI Benchmark 8208 | <<locked>> | 86% | 55,390 psi | 89% | 2438 fps | 100% |
| Alliant AR-Comp | <<locked>> | 86% | 56,217 psi | 90% | 2415 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 90% | 55,898 psi | 90% | 2602 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 53,621 psi | 86% | 2465 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 90% | 54,317 psi | 87% | 2485 fps | 100% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 53,983 psi | 87% | 2543 fps | 99.9% |
| Alliant Reloder-17 | <<locked>> | 96% | 54,143 psi | 87% | 2577 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 38,334 psi | 61% | 2322 fps | 99.1% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 43,105 psi | 69% | 2457 fps | 98.3% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 56,159 psi | 90% | 2510 fps | 99.9% |
| Bofors RP3 | <<locked>> | 92% | 54,085 psi | 87% | 2479 fps | 100% |
| Bofors RP7 | <<locked>> | 96% | 54,491 psi | 87% | 2455 fps | 97.8% |
| Hodgdon Benchmark | <<locked>> | 84% | 53,867 psi | 86% | 2386 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 86% | 54,578 psi | 88% | 2467 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 82% | 52,953 psi | 85% | 2507 fps | 99.9% |
| Hodgdon H322 | <<locked>> | 84% | 55,419 psi | 89% | 2424 fps | 100% |
| Hodgdon H380 | <<locked>> | 92% | 55,434 psi | 89% | 2495 fps | 99.7% |
| Hodgdon H414 | <<locked>> | 96% | 56,159 psi | 90% | 2563 fps | 98.7% |
| Hodgdon H4350 | <<locked>> | 98% | 53,519 psi | 86% | 2470 fps | 97% |
| Hodgdon H4895 | <<locked>> | 86% | 53,490 psi | 86% | 2454 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 49,240 psi | 79% | 2433 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 92% | 56,289 psi | 90% | 2523 fps | 100% |
| Hodgdon Superformance | <<locked>> | 98% | 55,172 psi | 88% | 2575 fps | 98.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,434 psi | 58% | 1468 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 53,737 psi | 86% | 2438 fps | 100% |
| IMR 3031 | <<locked>> | 90% | 55,303 psi | 89% | 2458 fps | 100% |
| IMR 4064 | <<locked>> | 94% | 55,927 psi | 90% | 2454 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 94% | 55,332 psi | 89% | 2440 fps | 98.4% |
| IMR 4350ᴾ | <<locked>> | 100% | 54,592 psi | 88% | 2474 fps | 97.8% |
| IMR 4451 Enduron | <<locked>> | 94% | 53,185 psi | 85% | 2431 fps | 98% |
| IMR 4831ᴾ | <<locked>> | 100% | 47,355 psi | 76% | 2406 fps | 99.3% |
| IMR 4895 | <<locked>> | 90% | 55,695 psi | 89% | 2511 fps | 100% |
| IMR 8208 XBR | <<locked>> | 86% | 55,390 psi | 89% | 2445 fps | 100% |
| Lovex D073.5 | <<locked>> | 82% | 55,622 psi | 89% | 2432 fps | 100% |
| Lovex D073.6 | <<locked>> | 88% | 55,912 psi | 90% | 2466 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 56,086 psi | 90% | 2425 fps | 100% |
| Lovex S062 | <<locked>> | 90% | 53,374 psi | 86% | 2430 fps | 100% |
| Lovex S065 | <<locked>> | 98% | 56,231 psi | 90% | 2477 fps | 99.3% |
| Lovex S070 | <<locked>> | 98% | 52,924 psi | 85% | 2462 fps | 98.3% |
| Norma 201 | <<locked>> | 88% | 55,216 psi | 89% | 2441 fps | 100% |
| Norma 202 | <<locked>> | 88% | 55,738 psi | 89% | 2442 fps | 100% |
| Norma 203B | <<locked>> | 90% | 53,476 psi | 86% | 2473 fps | 100% |
| Norma 204ᴾ | <<locked>> | 100% | 56,391 psi | 90% | 2526 fps | 96.8% |
| Norma URPᴾ | <<locked>> | 100% | 55,013 psi | 88% | 2528 fps | 99.8% |
| Ramshot Big Game | <<locked>> | 90% | 53,983 psi | 87% | 2499 fps | 100% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 54,592 psi | 88% | 2530 fps | 98.9% |
| Ramshot TAC | <<locked>> | 86% | 55,738 psi | 89% | 2470 fps | 99.4% |
| Ramshot Wild Boar | <<locked>> | 86% | 55,245 psi | 89% | 2483 fps | 100% |
| Ramshot X-Terminator | <<locked>> | 84% | 56,246 psi | 90% | 2449 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,143 psi | 58% | 1504 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 55,013 psi | 88% | 2426 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 55,680 psi | 89% | 2479 fps | 98.9% |
| ReloadSwiss RS 52 | <<locked>> | 88% | 54,882 psi | 88% | 2546 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 53,867 psi | 86% | 2572 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 55,245 psi | 89% | 2563 fps | 99.8% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 54,839 psi | 88% | 2588 fps | 99.7% |
| Rottweil R 901 | <<locked>> | 86% | 56,173 psi | 90% | 2419 fps | 100% |
| Rottweil R 902 | <<locked>> | 90% | 55,622 psi | 89% | 2439 fps | 100% |
| Rottweil R 903 | <<locked>> | 94% | 53,954 psi | 87% | 2471 fps | 100% |
| Rottweil R 907 | <<locked>> | 96% | 54,491 psi | 87% | 2455 fps | 97.8% |
| Shooters World Long Rifle | <<locked>> | 98% | 56,231 psi | 90% | 2477 fps | 99.3% |
| Shooters World Match Rifle | <<locked>> | 88% | 55,912 psi | 90% | 2466 fps | 100% |
| Shooters World Precision | <<locked>> | 90% | 53,374 psi | 86% | 2430 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 56,275 psi | 90% | 2500 fps | 98.7% |
| SNPE Vectan SP 11 | <<locked>> | 94% | 55,695 psi | 89% | 2528 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 54,056 psi | 87% | 2449 fps | 99.6% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 54,810 psi | 88% | 2469 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 53,505 psi | 86% | 2343 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 53,388 psi | 86% | 2343 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 56,014 psi | 90% | 2436 fps | 98.5% |
| Somchem S321 | <<locked>> | 82% | 53,127 psi | 85% | 2433 fps | 100% |
| Somchem S335 | <<locked>> | 88% | 56,144 psi | 90% | 2383 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 53,693 psi | 86% | 2442 fps | 100% |
| Somchem S355 | <<locked>> | 94% | 54,389 psi | 87% | 2470 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 49,545 psi | 79% | 2487 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 46,238 psi | 74% | 2381 fps | 96.1% |
| Unknown powder | <<locked>> | 96% | 52,054 psi | 83% | 2491 fps | 99.4% |
| Vihtavuori N130 | <<locked>> | 84% | 55,521 psi | 89% | 2335 fps | 100% |
| Vihtavuori N133 | <<locked>> | 90% | 56,231 psi | 90% | 2361 fps | 100% |
| Vihtavuori N135 | <<locked>> | 90% | 55,332 psi | 89% | 2395 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 55,361 psi | 89% | 2414 fps | 100% |
| Vihtavuori N150 | <<locked>> | 98% | 52,257 psi | 84% | 2409 fps | 100% |
| Vihtavuori N160 | <<locked>> | 96% | 52,562 psi | 84% | 2466 fps | 99.7% |
| Vihtavuori N530 | <<locked>> | 84% | 55,187 psi | 88% | 2451 fps | 100% |
| Vihtavuori N540 | <<locked>> | 90% | 54,853 psi | 88% | 2439 fps | 100% |
| Vihtavuori N550 | <<locked>> | 96% | 52,605 psi | 84% | 2507 fps | 99.7% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 41,742 psi | 67% | 2385 fps | 99% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 54,215 psi | 87% | 2463 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 52,779 psi | 85% | 2452 fps | 100% |
| Winchester 760 | <<locked>> | 96% | 56,159 psi | 90% | 2563 fps | 98.7% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 34,026 psi | 55% | 2326 fps | 99% |
| Winchester StaBALL Match | <<locked>> | 82% | 55,869 psi | 90% | 2492 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% | 47,863 psi | 77% | 2270 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 52,214 psi | 84% | 2369 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 40,408 psi | 65% | 2208 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 45,716 psi | 73% | 2326 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 43,439 psi | 70% | 2241 fps | 95.1% |
| Accurate 3100 | <<locked>> | 98% | 37,043 psi | 59% | 2245 fps | 95.5% |
| Accurate 4064 | <<locked>> | 80% | 38,189 psi | 61% | 2205 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 31,923 psi | 51% | 2149 fps | 95.7% |
| ADI AR 2206H | <<locked>> | 80% | 44,019 psi | 71% | 2313 fps | 99.5% |
| ADI AR 2208 | <<locked>> | 80% | 37,521 psi | 60% | 2186 fps | 98% |
| ADI Benchmark 8208 | <<locked>> | 80% | 46,050 psi | 74% | 2310 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 46,296 psi | 74% | 2298 fps | 100% |
| Alliant Power Pro 2000-MR | 51.5 gr | 80% | 39,755 psi | 64% | 2342 fps | 98.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 36,999 psi | 59% | 2205 fps | 99.1% |
| Alliant Reloder-15 | <<locked>> | 80% | 39,784 psi | 64% | 2260 fps | 98.6% |
| Alliant Reloder-16 | <<locked>> | 82% | 30,661 psi | 49% | 2122 fps | 95.1% |
| Alliant Reloder-17 | <<locked>> | 80% | 31,923 psi | 51% | 2183 fps | 97.6% |
| Alliant Reloder-23 | <<locked>> | 90% | 28,108 psi | 45% | 2092 fps | 95.7% |
| Alliant Reloder-26 | <<locked>> | 94% | 34,098 psi | 55% | 2292 fps | 95.7% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 43,091 psi | 69% | 2320 fps | 98.8% |
| Bofors RP3 | <<locked>> | 80% | 36,550 psi | 59% | 2209 fps | 99.1% |
| Bofors RP7 | <<locked>> | 88% | 42,525 psi | 68% | 2272 fps | 95.3% |
| Hodgdon Benchmark | <<locked>> | 80% | 47,921 psi | 77% | 2306 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 44,599 psi | 72% | 2329 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 80% | 49,458 psi | 79% | 2457 fps | 99.8% |
| Hodgdon H322 | <<locked>> | 80% | 49,008 psi | 79% | 2344 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 37,347 psi | 60% | 2211 fps | 96.9% |
| Hodgdon H414 | <<locked>> | 86% | 40,103 psi | 64% | 2313 fps | 95.5% |
| Hodgdon H4350 | <<locked>> | 94% | 47,311 psi | 76% | 2379 fps | 95.7% |
| Hodgdon H4895 | <<locked>> | 80% | 44,425 psi | 71% | 2323 fps | 99.8% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 26,368 psi | 42% | 1992 fps | 95.1% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 37,898 psi | 61% | 2251 fps | 99.3% |
| Hodgdon Superformance | 60.4 gr | 90% | 41,829 psi | 67% | 2363 fps | 95.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,426 psi | 42% | 1308 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 39,508 psi | 63% | 2218 fps | 99.2% |
| IMR 3031 | <<locked>> | 80% | 40,364 psi | 65% | 2255 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 36,738 psi | 59% | 2156 fps | 97.9% |
| IMR 4166 Enduron | <<locked>> | 84% | 41,437 psi | 66% | 2225 fps | 95.6% |
| IMR 4350 | <<locked>> | 92% | 42,496 psi | 68% | 2290 fps | 95.2% |
| IMR 4451 Enduron | <<locked>> | 86% | 41,727 psi | 67% | 2251 fps | 95.5% |
| IMR 4831 | <<locked>> | 86% | 29,979 psi | 48% | 2097 fps | 95.1% |
| IMR 4895 | <<locked>> | 80% | 40,727 psi | 65% | 2285 fps | 99.2% |
| IMR 8208 XBR | <<locked>> | 80% | 46,050 psi | 74% | 2317 fps | 100% |
| Lovex D073.5 | <<locked>> | 80% | 51,996 psi | 83% | 2387 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 43,105 psi | 69% | 2296 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 44,193 psi | 71% | 2257 fps | 99.5% |
| Lovex S062 | <<locked>> | 80% | 39,276 psi | 63% | 2218 fps | 99.6% |
| Lovex S065 | <<locked>> | 84% | 36,405 psi | 58% | 2169 fps | 95.7% |
| Lovex S070 | <<locked>> | 88% | 38,914 psi | 62% | 2236 fps | 95.2% |
| Norma 201 | <<locked>> | 80% | 43,047 psi | 69% | 2269 fps | 99.9% |
| Norma 202 | <<locked>> | 80% | 43,410 psi | 70% | 2276 fps | 100% |
| Norma 203B | <<locked>> | 80% | 39,146 psi | 63% | 2250 fps | 98.9% |
| Norma 204 | <<locked>> | 96% | 48,298 psi | 77% | 2426 fps | 95.3% |
| Norma URP | <<locked>> | 82% | 30,545 psi | 49% | 2116 fps | 95% |
| Ramshot Big Game | <<locked>> | 80% | 38,450 psi | 62% | 2261 fps | 98.7% |
| Ramshot Hunter | <<locked>> | 88% | 36,143 psi | 58% | 2243 fps | 95% |
| Ramshot TAC | <<locked>> | 80% | 45,890 psi | 74% | 2328 fps | 98.2% |
| Ramshot Wild Boar | <<locked>> | 80% | 45,310 psi | 73% | 2343 fps | 99.6% |
| Ramshot X-Terminator | <<locked>> | 80% | 49,472 psi | 79% | 2358 fps | 99.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,745 psi | 43% | 1340 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 51,474 psi | 83% | 2382 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 37,782 psi | 61% | 2196 fps | 95.3% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 41,698 psi | 67% | 2350 fps | 99% |
| ReloadSwiss RS 60 | 50.8 gr | 80% | 34,011 psi | 55% | 2241 fps | 99.8% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 31,676 psi | 51% | 2171 fps | 95.2% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 34,214 psi | 55% | 2226 fps | 95.1% |
| Rottweil R 901 | <<locked>> | 80% | 47,210 psi | 76% | 2301 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 41,205 psi | 66% | 2232 fps | 99.8% |
| Rottweil R 903 | <<locked>> | 80% | 34,490 psi | 55% | 2162 fps | 98.5% |
| Rottweil R 907 | <<locked>> | 88% | 42,525 psi | 68% | 2272 fps | 95.3% |
| Shooters World Long Rifle | <<locked>> | 84% | 36,405 psi | 58% | 2169 fps | 95.7% |
| Shooters World Match Rifle | <<locked>> | 80% | 43,105 psi | 69% | 2296 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 39,276 psi | 63% | 2218 fps | 99.6% |
| Shooters World SW4350 | <<locked>> | 88% | 38,914 psi | 62% | 2228 fps | 95.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 35,404 psi | 57% | 2207 fps | 98% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 44,092 psi | 71% | 2304 fps | 98.3% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 42,525 psi | 68% | 2288 fps | 99.3% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 44,643 psi | 72% | 2225 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 37,115 psi | 60% | 2115 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 40,422 psi | 65% | 2209 fps | 95.4% |
| Somchem S321 | <<locked>> | 80% | 49,719 psi | 80% | 2387 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 44,019 psi | 71% | 2225 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 43,932 psi | 70% | 2302 fps | 99.5% |
| Somchem S355 | <<locked>> | 80% | 35,259 psi | 57% | 2165 fps | 98.5% |
| Somchem S365 | <<locked>> | 80% | 25,570 psi | 41% | 2025 fps | 96.4% |
| Somchem S385 | <<locked>> | 98% | 42,337 psi | 68% | 2334 fps | 95.3% |
| Unknown powder | <<locked>> | 82% | 33,170 psi | 53% | 2162 fps | 95.2% |
| Vihtavuori N130 | <<locked>> | 80% | 49,255 psi | 79% | 2259 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 42,061 psi | 67% | 2178 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 40,611 psi | 65% | 2205 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 40,466 psi | 65% | 2211 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 30,240 psi | 48% | 2043 fps | 98.3% |
| Vihtavuori N160 | <<locked>> | 80% | 31,038 psi | 50% | 2095 fps | 95.1% |
| Vihtavuori N530 | <<locked>> | 80% | 48,617 psi | 78% | 2362 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 40,089 psi | 64% | 2231 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 31,285 psi | 50% | 2130 fps | 95.1% |
| Vihtavuori N555 | <<locked>> | 90% | 29,892 psi | 48% | 2155 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 29,791 psi | 48% | 2051 fps | 96.8% |
| Winchester 748 | <<locked>> | 80% | 49,298 psi | 79% | 2407 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 40,103 psi | 64% | 2313 fps | 95.5% |
| Winchester StaBALL HD | <<locked>> | 94% | 27,963 psi | 45% | 2156 fps | 96.1% |
| Winchester StaBALL Match | <<locked>> | 80% | 51,982 psi | 83% | 2443 fps | 100% |
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 102 powders for 8.5 x 55 Blaser loaded with the .338 | 250gr | Woodleigh PP SN. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,602 fps; across all powders the maximum-charge window runs from 1,468 fps to 2,602 fps. Accurate 3100 gives the best case fill at 100 %, and 102 of the 102 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 250.0 gr projectile in 0.338" calls for a 1:16.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate 4350, Alliant Reloder-16 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, Hodgdon Superformance rank at the top here: for 8.5 x 55 Blaser with the .338 | 250gr | Woodleigh PP SN 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.