Load Specifications
Load data in caliber 8.5 x 55 Blaser with .338 | 250gr | Woodleigh RN SN bullet and 100 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, Hodgdon Superformance and Alliant Reloder-17.
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.
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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% | 54,926 psi | 88% | 2362 fps | 100% |
| Accurate 2495 | <<locked>> | 88% | 53,563 psi | 86% | 2392 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 55,187 psi | 88% | 2448 fps | 100% |
| Accurate 2700 | <<locked>> | 90% | 56,173 psi | 90% | 2441 fps | 97.9% |
| Accurate 3100ᴾ | <<locked>> | 100% | 40,350 psi | 65% | 2310 fps | 96.6% |
| Accurate 4064 | <<locked>> | 90% | 53,534 psi | 86% | 2434 fps | 100% |
| Accurate 4350 | <<locked>> | 98% | 52,692 psi | 84% | 2510 fps | 99.8% |
| ADI AR 2206H | <<locked>> | 86% | 53,954 psi | 87% | 2461 fps | 100% |
| ADI AR 2208 | <<locked>> | 92% | 55,013 psi | 88% | 2464 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 86% | 56,347 psi | 90% | 2457 fps | 100% |
| Alliant AR-Comp | <<locked>> | 84% | 53,896 psi | 86% | 2388 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 88% | 53,330 psi | 86% | 2569 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 86% | 54,636 psi | 88% | 2470 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 54,853 psi | 88% | 2480 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 90% | 55,492 psi | 89% | 2500 fps | 100% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 54,302 psi | 87% | 2562 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 96% | 55,419 psi | 89% | 2592 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 38,696 psi | 62% | 2336 fps | 99.3% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 43,018 psi | 69% | 2480 fps | 98.6% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 53,679 psi | 86% | 2477 fps | 99.9% |
| Bofors RP3 | <<locked>> | 92% | 55,579 psi | 89% | 2497 fps | 100% |
| Bofors RP7 | <<locked>> | 96% | 55,550 psi | 89% | 2474 fps | 98.1% |
| Hodgdon Benchmark | <<locked>> | 84% | 54,810 psi | 88% | 2398 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 86% | 55,782 psi | 89% | 2490 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 82% | 54,012 psi | 87% | 2530 fps | 100% |
| Hodgdon H380 | <<locked>> | 90% | 52,866 psi | 85% | 2464 fps | 99.6% |
| Hodgdon H414 | <<locked>> | 98% | 55,738 psi | 89% | 2559 fps | 98.7% |
| Hodgdon H4350 | <<locked>> | 94% | 53,127 psi | 85% | 2477 fps | 97.1% |
| Hodgdon H4895 | <<locked>> | 86% | 54,462 psi | 87% | 2467 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 50,575 psi | 81% | 2451 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 88% | 53,809 psi | 86% | 2500 fps | 100% |
| Hodgdon Superformance | <<locked>> | 98% | 56,434 psi | 90% | 2595 fps | 98.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,534 psi | 57% | 1473 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 55,782 psi | 89% | 2474 fps | 100% |
| IMR 3031 | <<locked>> | 86% | 54,462 psi | 87% | 2448 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 54,592 psi | 88% | 2448 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 88% | 54,520 psi | 87% | 2431 fps | 98.4% |
| IMR 4350ᴾ | <<locked>> | 100% | 55,506 psi | 89% | 2493 fps | 98.1% |
| IMR 4451 Enduron | <<locked>> | 94% | 54,172 psi | 87% | 2454 fps | 98.3% |
| IMR 4831ᴾ | <<locked>> | 100% | 53,461 psi | 86% | 2507 fps | 99.9% |
| IMR 4895 | <<locked>> | 88% | 53,577 psi | 86% | 2484 fps | 100% |
| IMR 8208 XBR | <<locked>> | 86% | 56,347 psi | 90% | 2457 fps | 100% |
| Lovex D073.6 | <<locked>> | 86% | 53,780 psi | 86% | 2441 fps | 100% |
| Lovex S060 | <<locked>> | 86% | 53,708 psi | 86% | 2395 fps | 100% |
| Lovex S062 | <<locked>> | 90% | 54,346 psi | 87% | 2444 fps | 100% |
| Lovex S065 | <<locked>> | 96% | 53,345 psi | 86% | 2448 fps | 99.2% |
| Lovex S070 | <<locked>> | 98% | 54,215 psi | 87% | 2480 fps | 98.6% |
| Norma 201 | <<locked>> | 88% | 56,217 psi | 90% | 2454 fps | 100% |
| Norma 202 | <<locked>> | 86% | 53,403 psi | 86% | 2415 fps | 100% |
| Norma 203B | <<locked>> | 90% | 54,650 psi | 88% | 2490 fps | 100% |
| Norma 204ᴾ | <<locked>> | 100% | 56,347 psi | 90% | 2543 fps | 97.1% |
| Norma MRPᴾ | <<locked>> | 100% | 43,250 psi | 69% | 2441 fps | 96.1% |
| Norma URPᴾ | <<locked>> | 100% | 55,448 psi | 89% | 2546 fps | 99.9% |
| Ramshot Big Game | <<locked>> | 90% | 55,056 psi | 88% | 2513 fps | 100% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 54,215 psi | 87% | 2546 fps | 99.1% |
| Ramshot TAC | <<locked>> | 84% | 53,272 psi | 85% | 2438 fps | 99.3% |
| Ramshot Wild Boar | <<locked>> | 86% | 56,391 psi | 90% | 2500 fps | 100% |
| Ramshot X-Terminator | <<locked>> | 82% | 53,911 psi | 86% | 2421 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,027 psi | 58% | 1509 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 56,072 psi | 90% | 2441 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 53,142 psi | 85% | 2448 fps | 98.7% |
| ReloadSwiss RS 52 | <<locked>> | 88% | 55,927 psi | 90% | 2559 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 55,187 psi | 88% | 2589 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 55,956 psi | 90% | 2579 fps | 99.9% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 55,811 psi | 89% | 2608 fps | 99.8% |
| Rottweil R 901 | <<locked>> | 84% | 53,983 psi | 87% | 2392 fps | 100% |
| Rottweil R 902 | <<locked>> | 88% | 53,287 psi | 85% | 2411 fps | 100% |
| Rottweil R 903 | <<locked>> | 94% | 55,158 psi | 88% | 2487 fps | 100% |
| Rottweil R 907 | <<locked>> | 96% | 55,550 psi | 89% | 2474 fps | 98.1% |
| Shooters World Long Rifle | <<locked>> | 96% | 53,345 psi | 86% | 2448 fps | 99.2% |
| Shooters World Match Rifle | <<locked>> | 86% | 53,780 psi | 86% | 2441 fps | 100% |
| Shooters World Precision | <<locked>> | 90% | 54,346 psi | 87% | 2444 fps | 100% |
| Shooters World SW4350 | <<locked>> | 98% | 54,215 psi | 87% | 2480 fps | 98.6% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 53,447 psi | 86% | 2500 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 55,172 psi | 88% | 2464 fps | 99.7% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 55,680 psi | 89% | 2480 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 54,317 psi | 87% | 2356 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 54,578 psi | 88% | 2359 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 53,548 psi | 86% | 2408 fps | 98.2% |
| Somchem S321 | <<locked>> | 82% | 54,056 psi | 87% | 2444 fps | 100% |
| Somchem S335 | <<locked>> | 86% | 53,824 psi | 86% | 2356 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 54,795 psi | 88% | 2457 fps | 100% |
| Somchem S355 | <<locked>> | 94% | 55,564 psi | 89% | 2487 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 49,705 psi | 80% | 2500 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 46,514 psi | 75% | 2402 fps | 96.4% |
| Vihtavuori N130 | <<locked>> | 82% | 54,259 psi | 87% | 2320 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 54,534 psi | 87% | 2339 fps | 100% |
| Vihtavuori N135 | <<locked>> | 88% | 53,055 psi | 85% | 2379 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 53,882 psi | 86% | 2395 fps | 100% |
| Vihtavuori N150 | <<locked>> | 94% | 53,461 psi | 86% | 2421 fps | 100% |
| Vihtavuori N160 | <<locked>> | 98% | 54,447 psi | 87% | 2497 fps | 99.8% |
| Vihtavuori N530 | <<locked>> | 84% | 53,592 psi | 86% | 2418 fps | 100% |
| Vihtavuori N540 | <<locked>> | 90% | 55,245 psi | 89% | 2434 fps | 100% |
| Vihtavuori N550 | <<locked>> | 98% | 53,621 psi | 86% | 2507 fps | 99.7% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 42,395 psi | 68% | 2405 fps | 99.2% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 54,897 psi | 88% | 2480 fps | 100% |
| Winchester 748 | <<locked>> | 84% | 53,243 psi | 85% | 2457 fps | 100% |
| Winchester 760 | <<locked>> | 98% | 55,956 psi | 90% | 2562 fps | 98.8% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 34,606 psi | 55% | 2346 fps | 99.3% |
| Winchester StaBALL Match | <<locked>> | 88% | 55,608 psi | 89% | 2490 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% | 48,776 psi | 78% | 2287 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 41,510 psi | 67% | 2231 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 48,254 psi | 77% | 2359 fps | 100% |
| Accurate 2700 | <<locked>> | 82% | 43,511 psi | 70% | 2254 fps | 95.3% |
| Accurate 3100 | <<locked>> | 96% | 35,186 psi | 56% | 2215 fps | 95% |
| Accurate 4064 | <<locked>> | 80% | 39,276 psi | 63% | 2231 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 30,690 psi | 49% | 2129 fps | 95.4% |
| ADI AR 2206H | <<locked>> | 80% | 44,759 psi | 72% | 2326 fps | 99.6% |
| ADI AR 2208 | <<locked>> | 80% | 38,203 psi | 61% | 2198 fps | 98.2% |
| ADI Benchmark 8208 | <<locked>> | 80% | 46,833 psi | 75% | 2329 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 47,297 psi | 76% | 2310 fps | 100% |
| Alliant Power Pro 2000-MR | 52.7 gr | 80% | 40,828 psi | 65% | 2362 fps | 98.7% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 45,353 psi | 73% | 2336 fps | 99.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 37,768 psi | 61% | 2218 fps | 99.3% |
| Alliant Reloder-15 | <<locked>> | 80% | 40,509 psi | 65% | 2274 fps | 98.8% |
| Alliant Reloder-16 | <<locked>> | 82% | 31,241 psi | 50% | 2136 fps | 95.4% |
| Alliant Reloder-17 | 51.8 gr | 80% | 32,460 psi | 52% | 2195 fps | 97.8% |
| Alliant Reloder-23 | <<locked>> | 88% | 27,035 psi | 43% | 2060 fps | 95.1% |
| Alliant Reloder-26 | <<locked>> | 92% | 32,721 psi | 52% | 2257 fps | 95.1% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 43,961 psi | 70% | 2333 fps | 99% |
| Bofors RP3 | <<locked>> | 80% | 37,492 psi | 60% | 2224 fps | 99.3% |
| Bofors RP7 | <<locked>> | 88% | 43,555 psi | 70% | 2293 fps | 95.7% |
| Hodgdon Benchmark | <<locked>> | 80% | 48,704 psi | 78% | 2316 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 45,818 psi | 73% | 2356 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 80% | 50,488 psi | 81% | 2480 fps | 99.9% |
| Hodgdon H380 | <<locked>> | 80% | 38,247 psi | 61% | 2228 fps | 97.2% |
| Hodgdon H414 | <<locked>> | 88% | 40,234 psi | 65% | 2316 fps | 95.5% |
| Hodgdon H4350 | <<locked>> | 88% | 44,106 psi | 71% | 2336 fps | 95% |
| Hodgdon H4895 | <<locked>> | 80% | 45,208 psi | 72% | 2336 fps | 99.9% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 26,919 psi | 43% | 2008 fps | 95.5% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 41,133 psi | 66% | 2316 fps | 99.7% |
| Hodgdon Superformance | 61.7 gr | 90% | 42,757 psi | 69% | 2382 fps | 95.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,614 psi | 43% | 1316 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 43,482 psi | 70% | 2293 fps | 99.7% |
| IMR 3031 | <<locked>> | 80% | 45,107 psi | 72% | 2326 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 40,132 psi | 64% | 2228 fps | 98.8% |
| IMR 4166 Enduron | <<locked>> | 80% | 42,511 psi | 68% | 2244 fps | 96% |
| IMR 4350 | <<locked>> | 92% | 43,395 psi | 70% | 2313 fps | 95.6% |
| IMR 4451 Enduron | <<locked>> | 84% | 40,045 psi | 64% | 2228 fps | 95.2% |
| IMR 4831 | <<locked>> | 82% | 29,820 psi | 48% | 2093 fps | 95% |
| IMR 4895 | <<locked>> | 80% | 41,510 psi | 67% | 2300 fps | 99.3% |
| IMR 8208 XBR | <<locked>> | 80% | 46,833 psi | 75% | 2329 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 43,918 psi | 70% | 2306 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 44,918 psi | 72% | 2270 fps | 99.6% |
| Lovex S062 | <<locked>> | 80% | 40,030 psi | 64% | 2231 fps | 99.7% |
| Lovex S065 | <<locked>> | 82% | 35,027 psi | 56% | 2142 fps | 95.2% |
| Lovex S070 | <<locked>> | 88% | 39,856 psi | 64% | 2254 fps | 95.6% |
| Norma 201 | <<locked>> | 80% | 44,092 psi | 71% | 2287 fps | 100% |
| Norma 202 | <<locked>> | 80% | 44,193 psi | 71% | 2287 fps | 100% |
| Norma 203B | <<locked>> | 80% | 39,885 psi | 64% | 2264 fps | 99.1% |
| Norma 204 | <<locked>> | 96% | 49,182 psi | 79% | 2441 fps | 95.7% |
| Norma MRP | <<locked>> | 98% | 40,451 psi | 65% | 2388 fps | 95.2% |
| Norma URP | <<locked>> | 82% | 31,169 psi | 50% | 2129 fps | 95.3% |
| Ramshot Big Game | <<locked>> | 80% | 39,479 psi | 63% | 2280 fps | 98.9% |
| Ramshot Hunter | <<locked>> | 88% | 36,825 psi | 59% | 2257 fps | 95.3% |
| Ramshot TAC | <<locked>> | 80% | 46,731 psi | 75% | 2343 fps | 98.4% |
| Ramshot Wild Boar | <<locked>> | 80% | 46,253 psi | 74% | 2359 fps | 99.7% |
| Ramshot X-Terminator | <<locked>> | 80% | 50,604 psi | 81% | 2375 fps | 99.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,934 psi | 43% | 1348 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 52,504 psi | 84% | 2395 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 38,609 psi | 62% | 2211 fps | 95.6% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 42,540 psi | 68% | 2362 fps | 99.1% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 34,563 psi | 55% | 2254 fps | 99.9% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 32,590 psi | 52% | 2192 fps | 95.6% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 34,998 psi | 56% | 2244 fps | 95.6% |
| Rottweil R 901 | <<locked>> | 80% | 48,080 psi | 77% | 2313 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 41,989 psi | 67% | 2244 fps | 99.8% |
| Rottweil R 903 | <<locked>> | 80% | 35,244 psi | 57% | 2175 fps | 98.7% |
| Rottweil R 907 | <<locked>> | 88% | 43,555 psi | 70% | 2293 fps | 95.7% |
| Shooters World Long Rifle | <<locked>> | 82% | 35,027 psi | 56% | 2142 fps | 95.2% |
| Shooters World Match Rifle | <<locked>> | 80% | 43,918 psi | 70% | 2306 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 40,030 psi | 64% | 2231 fps | 99.7% |
| Shooters World SW4350 | <<locked>> | 88% | 39,856 psi | 64% | 2254 fps | 95.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 36,042 psi | 58% | 2218 fps | 98.2% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 45,005 psi | 72% | 2320 fps | 98.5% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 43,207 psi | 69% | 2300 fps | 99.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 45,208 psi | 72% | 2234 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 37,652 psi | 60% | 2123 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 38,914 psi | 62% | 2182 fps | 95% |
| Somchem S321 | <<locked>> | 80% | 50,662 psi | 81% | 2402 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 45,005 psi | 72% | 2241 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 44,788 psi | 72% | 2316 fps | 99.6% |
| Somchem S355 | <<locked>> | 80% | 36,158 psi | 58% | 2182 fps | 98.7% |
| Somchem S365 | <<locked>> | 80% | 26,252 psi | 42% | 2044 fps | 96.8% |
| Somchem S385 | <<locked>> | 98% | 43,468 psi | 70% | 2352 fps | 95.7% |
| Vihtavuori N130 | <<locked>> | 80% | 50,995 psi | 82% | 2280 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 45,556 psi | 73% | 2228 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 41,307 psi | 66% | 2221 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 41,930 psi | 67% | 2234 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 34,301 psi | 55% | 2126 fps | 99.2% |
| Vihtavuori N160 | <<locked>> | 82% | 32,590 psi | 52% | 2133 fps | 95.8% |
| Vihtavuori N530 | <<locked>> | 80% | 47,079 psi | 75% | 2329 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 40,306 psi | 65% | 2228 fps | 100% |
| Vihtavuori N550 | <<locked>> | 82% | 32,039 psi | 51% | 2136 fps | 95.4% |
| Vihtavuori N555 | <<locked>> | 88% | 28,776 psi | 46% | 2126 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 30,342 psi | 49% | 2067 fps | 97.1% |
| Winchester 748 | <<locked>> | 80% | 46,543 psi | 75% | 2365 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 40,234 psi | 65% | 2316 fps | 95.5% |
| Winchester StaBALL HD | <<locked>> | 92% | 26,948 psi | 43% | 2123 fps | 95.3% |
| Winchester StaBALL Match | <<locked>> | 80% | 42,743 psi | 69% | 2306 fps | 99.7% |
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 119 powders for 8.5 x 55 Blaser loaded with the .338 | 250gr | Woodleigh RN SN. ReloadSwiss RS 70 delivers the highest muzzle velocity at 2,608 fps; across all powders the maximum-charge window runs from 1,473 fps to 2,608 fps. Accurate 3100 gives the best case fill at 100 %, and 119 of the 119 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (430 MPa), the top charges use 54–90 %, leaving at least 10 % headroom. The 250.0 gr projectile in 0.338" calls for a 1:6.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate High Country, ADI AR 2209 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, Hodgdon Superformance, Alliant Reloder-17 rank at the top here: for 8.5 x 55 Blaser with the .338 | 250gr | Woodleigh RN SN they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate High Country, ADI AR 2213, Alliant Reloder-22 burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.