Load Specifications
Load data in caliber 8.5 x 55 Blaser with .338 | 250gr | Alaska Bullet Works Kodiak PP SPBC bullet and 103 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-17, ReloadSwiss RS 60 and Alliant Power Pro 2000-MR.
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% | 53,592 psi | 86% | 2339 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 55,390 psi | 89% | 2405 fps | 100% |
| Accurate 2495 | <<locked>> | 90% | 55,448 psi | 89% | 2405 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 55,521 psi | 89% | 2451 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 55,521 psi | 89% | 2451 fps | 100% |
| Accurate 2700 | <<locked>> | 94% | 55,825 psi | 90% | 2415 fps | 97.6% |
| Accurate 3100ᴾ | <<locked>> | 100% | 38,682 psi | 62% | 2270 fps | 95.9% |
| Accurate 4064 | <<locked>> | 92% | 55,129 psi | 88% | 2444 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 54,491 psi | 87% | 2523 fps | 99.8% |
| ADI AR 2206H | <<locked>> | 88% | 55,898 psi | 90% | 2474 fps | 100% |
| ADI AR 2208 | <<locked>> | 92% | 53,534 psi | 86% | 2431 fps | 99.9% |
| ADI Benchmark 8208 | <<locked>> | 86% | 54,984 psi | 88% | 2428 fps | 100% |
| Alliant AR-Comp | <<locked>> | 86% | 55,724 psi | 89% | 2402 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 90% | 55,593 psi | 89% | 2585 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 53,272 psi | 85% | 2451 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 90% | 53,882 psi | 86% | 2467 fps | 99.9% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 52,750 psi | 85% | 2526 fps | 99.9% |
| Alliant Reloder-17 | <<locked>> | 96% | 53,548 psi | 86% | 2559 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 37,449 psi | 60% | 2300 fps | 98.9% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 41,423 psi | 66% | 2434 fps | 98.1% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 55,579 psi | 89% | 2490 fps | 99.9% |
| Bofors RP3 | <<locked>> | 92% | 53,664 psi | 86% | 2464 fps | 100% |
| Bofors RP7 | <<locked>> | 96% | 54,172 psi | 87% | 2441 fps | 97.7% |
| Hodgdon Benchmark | <<locked>> | 84% | 53,737 psi | 86% | 2372 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 86% | 54,230 psi | 87% | 2461 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 84% | 56,333 psi | 90% | 2549 fps | 100% |
| Hodgdon H322 | <<locked>> | 84% | 54,984 psi | 88% | 2408 fps | 100% |
| Hodgdon H380 | <<locked>> | 92% | 54,810 psi | 88% | 2477 fps | 99.6% |
| Hodgdon H414 | <<locked>> | 96% | 55,564 psi | 89% | 2543 fps | 98.5% |
| Hodgdon H4350ᴾ | <<locked>> | 100% | 56,333 psi | 90% | 2507 fps | 97.4% |
| Hodgdon H4895 | <<locked>> | 86% | 53,084 psi | 85% | 2438 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 48,921 psi | 78% | 2418 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 92% | 55,608 psi | 89% | 2513 fps | 100% |
| Hodgdon Superformance | <<locked>> | 98% | 54,679 psi | 88% | 2556 fps | 98% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,375 psi | 57% | 1460 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 53,359 psi | 86% | 2428 fps | 100% |
| IMR 3031 | <<locked>> | 90% | 54,810 psi | 88% | 2441 fps | 100% |
| IMR 4064 | <<locked>> | 94% | 55,564 psi | 89% | 2448 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 94% | 55,013 psi | 88% | 2425 fps | 98.3% |
| IMR 4350ᴾ | <<locked>> | 100% | 54,056 psi | 87% | 2461 fps | 97.7% |
| IMR 4451 Enduron | <<locked>> | 96% | 55,912 psi | 90% | 2467 fps | 98.3% |
| IMR 4831ᴾ | <<locked>> | 100% | 45,992 psi | 74% | 2388 fps | 99.1% |
| IMR 4895 | <<locked>> | 90% | 55,245 psi | 89% | 2493 fps | 100% |
| IMR 8208 XBR | <<locked>> | 86% | 54,984 psi | 88% | 2428 fps | 100% |
| Lovex D073.5 | <<locked>> | 82% | 55,216 psi | 89% | 2418 fps | 100% |
| Lovex D073.6 | <<locked>> | 88% | 55,521 psi | 89% | 2451 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 55,709 psi | 89% | 2411 fps | 100% |
| Lovex S062 | <<locked>> | 92% | 56,072 psi | 90% | 2454 fps | 100% |
| Lovex S065 | <<locked>> | 98% | 55,288 psi | 89% | 2461 fps | 99.2% |
| Lovex S070ᴾ | <<locked>> | 100% | 56,014 psi | 90% | 2490 fps | 98.6% |
| Norma 201 | <<locked>> | 88% | 54,795 psi | 88% | 2428 fps | 100% |
| Norma 202 | <<locked>> | 88% | 55,332 psi | 89% | 2428 fps | 100% |
| Norma 203B | <<locked>> | 90% | 53,113 psi | 85% | 2457 fps | 100% |
| Norma 204ᴾ | <<locked>> | 100% | 54,694 psi | 88% | 2507 fps | 96.6% |
| Norma URPᴾ | <<locked>> | 100% | 53,766 psi | 86% | 2513 fps | 99.8% |
| Ramshot Big Game | <<locked>> | 90% | 53,606 psi | 86% | 2484 fps | 100% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 52,547 psi | 84% | 2510 fps | 98.8% |
| Ramshot TAC | <<locked>> | 86% | 55,376 psi | 89% | 2454 fps | 99.3% |
| Ramshot Wild Boar | <<locked>> | 86% | 54,926 psi | 88% | 2467 fps | 100% |
| Ramshot X-Terminator | <<locked>> | 84% | 55,912 psi | 90% | 2434 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,882 psi | 58% | 1496 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 54,621 psi | 88% | 2411 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 55,114 psi | 88% | 2461 fps | 98.8% |
| ReloadSwiss RS 52 | <<locked>> | 88% | 54,157 psi | 87% | 2526 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 53,577 psi | 86% | 2559 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 54,070 psi | 87% | 2546 fps | 99.7% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 53,969 psi | 87% | 2569 fps | 99.6% |
| Rottweil R 901 | <<locked>> | 86% | 55,724 psi | 89% | 2405 fps | 100% |
| Rottweil R 902 | <<locked>> | 90% | 55,259 psi | 89% | 2425 fps | 100% |
| Rottweil R 903 | <<locked>> | 94% | 53,534 psi | 86% | 2457 fps | 100% |
| Rottweil R 907 | <<locked>> | 96% | 54,172 psi | 87% | 2441 fps | 97.7% |
| Shooters World Long Rifle | <<locked>> | 98% | 55,288 psi | 89% | 2461 fps | 99.2% |
| Shooters World Match Rifle | <<locked>> | 88% | 55,521 psi | 89% | 2451 fps | 100% |
| Shooters World Precision | <<locked>> | 92% | 56,072 psi | 90% | 2454 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 56,014 psi | 90% | 2490 fps | 98.6% |
| SNPE Vectan SP 11 | <<locked>> | 94% | 55,376 psi | 89% | 2513 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 53,664 psi | 86% | 2434 fps | 99.5% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 54,186 psi | 87% | 2451 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 53,113 psi | 85% | 2329 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 53,011 psi | 85% | 2329 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 55,782 psi | 89% | 2421 fps | 98.3% |
| Somchem S321 | <<locked>> | 84% | 56,391 psi | 90% | 2464 fps | 100% |
| Somchem S335 | <<locked>> | 88% | 55,753 psi | 89% | 2369 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 53,301 psi | 85% | 2428 fps | 100% |
| Somchem S355 | <<locked>> | 94% | 54,041 psi | 87% | 2454 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 48,051 psi | 77% | 2467 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 44,875 psi | 72% | 2365 fps | 95.8% |
| Unknown powder | <<locked>> | 98% | 54,868 psi | 88% | 2516 fps | 99.6% |
| Vihtavuori N130 | <<locked>> | 84% | 56,304 psi | 90% | 2333 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 53,330 psi | 86% | 2316 fps | 100% |
| Vihtavuori N135 | <<locked>> | 90% | 54,868 psi | 88% | 2388 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 55,622 psi | 89% | 2405 fps | 100% |
| Vihtavuori N150 | <<locked>> | 96% | 55,477 psi | 89% | 2434 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 56,318 psi | 90% | 2507 fps | 99.8% |
| Vihtavuori N530 | <<locked>> | 86% | 55,593 psi | 89% | 2431 fps | 100% |
| Vihtavuori N540 | <<locked>> | 90% | 53,824 psi | 86% | 2408 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 55,143 psi | 88% | 2513 fps | 99.7% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 40,828 psi | 65% | 2369 fps | 98.8% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 53,113 psi | 85% | 2448 fps | 100% |
| Winchester 748 | <<locked>> | 84% | 56,101 psi | 90% | 2484 fps | 100% |
| Winchester 760 | <<locked>> | 96% | 55,564 psi | 89% | 2543 fps | 98.5% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 33,489 psi | 54% | 2303 fps | 98.7% |
| Winchester StaBALL Match | <<locked>> | 82% | 55,550 psi | 89% | 2477 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% | 47,427 psi | 76% | 2260 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 51,764 psi | 83% | 2362 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 40,190 psi | 64% | 2201 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 45,339 psi | 73% | 2320 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 45,339 psi | 73% | 2320 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 45,905 psi | 74% | 2277 fps | 95.7% |
| Accurate 3100 | <<locked>> | 98% | 36,172 psi | 58% | 2224 fps | 95.1% |
| Accurate 4064 | <<locked>> | 80% | 38,000 psi | 61% | 2201 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 31,546 psi | 51% | 2139 fps | 95.5% |
| ADI AR 2206H | <<locked>> | 80% | 43,613 psi | 70% | 2297 fps | 99.4% |
| ADI AR 2208 | <<locked>> | 80% | 37,159 psi | 60% | 2169 fps | 97.8% |
| ADI Benchmark 8208 | <<locked>> | 80% | 45,672 psi | 73% | 2300 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 46,050 psi | 74% | 2287 fps | 100% |
| Alliant Power Pro 2000-MR | 51.2 gr | 80% | 39,653 psi | 64% | 2326 fps | 98.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 36,651 psi | 59% | 2188 fps | 99% |
| Alliant Reloder-15 | <<locked>> | 80% | 39,392 psi | 63% | 2241 fps | 98.4% |
| Alliant Reloder-16 | <<locked>> | 84% | 32,343 psi | 52% | 2152 fps | 95.7% |
| Alliant Reloder-17 | 50.4 gr | 80% | 31,647 psi | 51% | 2165 fps | 97.3% |
| Alliant Reloder-23 | <<locked>> | 90% | 27,876 psi | 45% | 2073 fps | 95.3% |
| Alliant Reloder-26 | <<locked>> | 94% | 33,895 psi | 54% | 2274 fps | 95.4% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 42,772 psi | 69% | 2303 fps | 98.6% |
| Bofors RP3 | <<locked>> | 80% | 36,172 psi | 58% | 2192 fps | 99% |
| Bofors RP7 | <<locked>> | 88% | 42,424 psi | 68% | 2260 fps | 95.1% |
| Hodgdon Benchmark | <<locked>> | 80% | 47,543 psi | 76% | 2290 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 44,498 psi | 71% | 2326 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 80% | 49,037 psi | 79% | 2451 fps | 99.7% |
| Hodgdon H322 | <<locked>> | 80% | 48,588 psi | 78% | 2329 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 37,217 psi | 60% | 2195 fps | 96.7% |
| Hodgdon H414 | <<locked>> | 86% | 39,813 psi | 64% | 2297 fps | 95.2% |
| Hodgdon H4350 | <<locked>> | 94% | 46,949 psi | 75% | 2369 fps | 95.5% |
| Hodgdon H4895 | <<locked>> | 80% | 44,048 psi | 71% | 2306 fps | 99.7% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 27,804 psi | 45% | 2021 fps | 95.6% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 37,739 psi | 61% | 2244 fps | 99.3% |
| Hodgdon Superformance | <<locked>> | 92% | 44,280 psi | 71% | 2395 fps | 95.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,440 psi | 42% | 1302 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 39,320 psi | 63% | 2211 fps | 99.1% |
| IMR 3031 | <<locked>> | 80% | 40,132 psi | 64% | 2244 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 36,579 psi | 59% | 2152 fps | 97.9% |
| IMR 4166 Enduron | <<locked>> | 84% | 41,118 psi | 66% | 2208 fps | 95.3% |
| IMR 4350 | <<locked>> | 92% | 42,177 psi | 68% | 2280 fps | 95% |
| IMR 4451 Enduron | <<locked>> | 86% | 41,394 psi | 66% | 2241 fps | 95.3% |
| IMR 4831 | <<locked>> | 88% | 31,676 psi | 51% | 2126 fps | 95.6% |
| IMR 4895 | <<locked>> | 80% | 40,350 psi | 65% | 2270 fps | 99.1% |
| IMR 8208 XBR | <<locked>> | 80% | 45,672 psi | 73% | 2300 fps | 100% |
| Lovex D073.5 | <<locked>> | 80% | 51,590 psi | 83% | 2372 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 42,699 psi | 68% | 2280 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 43,801 psi | 70% | 2241 fps | 99.4% |
| Lovex S062 | <<locked>> | 80% | 38,899 psi | 62% | 2201 fps | 99.5% |
| Lovex S065 | <<locked>> | 84% | 36,085 psi | 58% | 2152 fps | 95.4% |
| Lovex S070 | <<locked>> | 88% | 38,798 psi | 62% | 2224 fps | 95% |
| Norma 201 | <<locked>> | 80% | 42,902 psi | 69% | 2257 fps | 99.9% |
| Norma 202 | <<locked>> | 80% | 42,989 psi | 69% | 2260 fps | 100% |
| Norma 203B | <<locked>> | 80% | 38,783 psi | 62% | 2231 fps | 98.8% |
| Norma 204 | <<locked>> | 96% | 47,834 psi | 77% | 2405 fps | 95% |
| Norma URP | <<locked>> | 84% | 32,256 psi | 52% | 2146 fps | 95.5% |
| Ramshot Big Game | <<locked>> | 80% | 38,276 psi | 61% | 2247 fps | 98.5% |
| Ramshot Hunter | <<locked>> | 90% | 38,145 psi | 61% | 2270 fps | 95.5% |
| Ramshot TAC | <<locked>> | 80% | 45,585 psi | 73% | 2310 fps | 98% |
| Ramshot Wild Boar | <<locked>> | 80% | 44,991 psi | 72% | 2326 fps | 99.5% |
| Ramshot X-Terminator | <<locked>> | 80% | 49,371 psi | 79% | 2346 fps | 99.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,760 psi | 43% | 1335 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 51,314 psi | 82% | 2369 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 37,681 psi | 60% | 2182 fps | 95% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 41,292 psi | 66% | 2333 fps | 98.8% |
| ReloadSwiss RS 60 | 50.4 gr | 80% | 33,692 psi | 54% | 2221 fps | 99.7% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 33,620 psi | 54% | 2205 fps | 95.8% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 36,318 psi | 58% | 2260 fps | 95.8% |
| Rottweil R 901 | <<locked>> | 80% | 46,775 psi | 75% | 2287 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 40,799 psi | 65% | 2215 fps | 99.7% |
| Rottweil R 903 | <<locked>> | 80% | 34,142 psi | 55% | 2146 fps | 98.3% |
| Rottweil R 907 | <<locked>> | 88% | 42,424 psi | 68% | 2260 fps | 95.1% |
| Shooters World Long Rifle | <<locked>> | 84% | 36,085 psi | 58% | 2152 fps | 95.4% |
| Shooters World Match Rifle | <<locked>> | 80% | 42,699 psi | 68% | 2280 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 38,899 psi | 62% | 2201 fps | 99.5% |
| Shooters World SW4350 | <<locked>> | 88% | 38,798 psi | 62% | 2224 fps | 95% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 35,070 psi | 56% | 2188 fps | 97.8% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 43,729 psi | 70% | 2287 fps | 98.2% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 42,134 psi | 68% | 2270 fps | 99.2% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 44,251 psi | 71% | 2211 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 36,753 psi | 59% | 2100 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 40,089 psi | 64% | 2192 fps | 95.1% |
| Somchem S321 | <<locked>> | 80% | 49,371 psi | 79% | 2372 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 43,859 psi | 70% | 2215 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 43,569 psi | 70% | 2287 fps | 99.4% |
| Somchem S355 | <<locked>> | 80% | 35,085 psi | 56% | 2152 fps | 98.3% |
| Somchem S365 | <<locked>> | 80% | 25,454 psi | 41% | 2011 fps | 96.1% |
| Somchem S385 | <<locked>> | 98% | 42,105 psi | 68% | 2320 fps | 95% |
| Unknown powder | <<locked>> | 84% | 35,012 psi | 56% | 2192 fps | 95.8% |
| Vihtavuori N130 | <<locked>> | 80% | 49,951 psi | 80% | 2257 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 44,556 psi | 71% | 2205 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 40,176 psi | 64% | 2195 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 40,770 psi | 65% | 2205 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 33,257 psi | 53% | 2096 fps | 98.9% |
| Vihtavuori N160 | <<locked>> | 82% | 31,517 psi | 51% | 2100 fps | 95.1% |
| Vihtavuori N530 | <<locked>> | 80% | 45,672 psi | 73% | 2297 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 39,276 psi | 63% | 2201 fps | 100% |
| Vihtavuori N550 | <<locked>> | 84% | 32,982 psi | 53% | 2146 fps | 95.5% |
| Vihtavuori N555 | <<locked>> | 90% | 29,617 psi | 47% | 2136 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 29,559 psi | 47% | 2034 fps | 96.5% |
| Winchester 748 | <<locked>> | 80% | 48,892 psi | 78% | 2392 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 39,813 psi | 64% | 2297 fps | 95.2% |
| Winchester StaBALL HD | <<locked>> | 94% | 27,789 psi | 45% | 2136 fps | 95.6% |
| Winchester StaBALL Match | <<locked>> | 80% | 51,648 psi | 83% | 2428 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 120 powders for 8.5 x 55 Blaser loaded with the .338 | 250gr | Alaska Bullet Works Kodiak PP SPBC. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,585 fps; across all powders the maximum-charge window runs from 1,460 fps to 2,585 fps. Accurate 3100 gives the best case fill at 100 %, and 120 of the 120 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (430 MPa), the top charges use 52–90 %, leaving at least 10 % headroom. The 250.0 gr projectile in 0.338" calls for a 1:16.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate 4350, 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 Reloder-17, ReloadSwiss RS 60, Alliant Power Pro 2000-MR rank at the top here: for 8.5 x 55 Blaser with the .338 | 250gr | Alaska Bullet Works Kodiak PP SPBC they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AR 2209, Alliant Reloder-19, 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.