Load Specifications
Bullet Manufacturer:Rhino Bullets
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:1:13.0
Load data in caliber 8.5 x 55 Blaser with .338 | 250gr | Rhino Penetrator bullet and 107 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% | 53,374 psi | 86% | 2306 fps | 100% |
| Accurate 2460 | <<locked>> | 84% | 55,114 psi | 88% | 2372 fps | 100% |
| Accurate 2495 | <<locked>> | 92% | 54,360 psi | 87% | 2365 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 53,185 psi | 85% | 2385 fps | 100% |
| Accurate 2700 | <<locked>> | 92% | 54,389 psi | 87% | 2365 fps | 96.8% |
| Accurate 4064 | <<locked>> | 94% | 54,143 psi | 87% | 2405 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 49,661 psi | 80% | 2428 fps | 99.2% |
| Accurate LT-30 | <<locked>> | 82% | 56,014 psi | 90% | 2297 fps | 100% |
| Accurate LT-32 | <<locked>> | 82% | 56,434 psi | 90% | 2320 fps | 100% |
| ADI AR 2206H | <<locked>> | 90% | 55,550 psi | 89% | 2438 fps | 100% |
| ADI AR 2208 | <<locked>> | 94% | 53,127 psi | 85% | 2392 fps | 99.7% |
| ADI Benchmark 8208 | <<locked>> | 88% | 54,824 psi | 88% | 2395 fps | 100% |
| Alliant AR-Comp | <<locked>> | 88% | 55,085 psi | 88% | 2369 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 53,011 psi | 85% | 2438 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 92% | 55,042 psi | 88% | 2543 fps | 99.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 96% | 56,028 psi | 90% | 2454 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 84% | 56,434 psi | 90% | 2346 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 92% | 53,301 psi | 85% | 2428 fps | 99.8% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 48,704 psi | 78% | 2431 fps | 99.3% |
| Alliant Reloder-17 | <<locked>> | 98% | 52,692 psi | 84% | 2513 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 34,577 psi | 55% | 2208 fps | 97.6% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 37,768 psi | 61% | 2326 fps | 96.1% |
| Baschieri & Pellagri 106 | <<locked>> | 82% | 54,926 psi | 88% | 2297 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 90% | 55,187 psi | 88% | 2454 fps | 99.7% |
| Bofors RP3 | <<locked>> | 96% | 56,391 psi | 90% | 2467 fps | 100% |
| Bofors RP7 | <<locked>> | 98% | 53,417 psi | 86% | 2392 fps | 96.9% |
| Hodgdon Benchmark | <<locked>> | 86% | 53,432 psi | 86% | 2339 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 88% | 53,722 psi | 86% | 2425 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 86% | 55,579 psi | 89% | 2510 fps | 99.9% |
| Hodgdon H322 | <<locked>> | 84% | 55,550 psi | 89% | 2388 fps | 100% |
| Hodgdon H335 | <<locked>> | 82% | 53,011 psi | 85% | 2372 fps | 100% |
| Hodgdon H380 | <<locked>> | 94% | 54,346 psi | 87% | 2438 fps | 99.3% |
| Hodgdon H414ᴾ | <<locked>> | 100% | 52,866 psi | 85% | 2470 fps | 97.6% |
| Hodgdon H4350 | <<locked>> | 98% | 54,172 psi | 87% | 2441 fps | 96.4% |
| Hodgdon H4895 | <<locked>> | 90% | 56,086 psi | 90% | 2444 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 45,020 psi | 72% | 2333 fps | 99.6% |
| Hodgdon LEVERevolution | <<locked>> | 92% | 54,897 psi | 88% | 2477 fps | 100% |
| Hodgdon Superformanceᴾ | <<locked>> | 100% | 54,056 psi | 87% | 2507 fps | 97.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,201 psi | 56% | 1427 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 53,896 psi | 86% | 2405 fps | 100% |
| IMR 3031 | <<locked>> | 90% | 55,680 psi | 89% | 2428 fps | 100% |
| IMR 4064 | <<locked>> | 94% | 56,014 psi | 90% | 2421 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 92% | 56,420 psi | 90% | 2405 fps | 97.9% |
| IMR 4198 | <<locked>> | 82% | 53,447 psi | 86% | 2270 fps | 100% |
| IMR 4350ᴾ | <<locked>> | 100% | 50,169 psi | 80% | 2372 fps | 96.4% |
| IMR 4451 Enduron | <<locked>> | 98% | 55,579 psi | 89% | 2421 fps | 97.8% |
| IMR 4831ᴾ | <<locked>> | 100% | 47,152 psi | 76% | 2379 fps | 98.9% |
| IMR 4895 | <<locked>> | 92% | 54,621 psi | 88% | 2454 fps | 100% |
| IMR 8208 XBR | <<locked>> | 88% | 54,824 psi | 88% | 2395 fps | 100% |
| Lovex D073.5 | <<locked>> | 84% | 55,085 psi | 88% | 2385 fps | 100% |
| Lovex D073.6 | <<locked>> | 90% | 54,795 psi | 88% | 2415 fps | 100% |
| Lovex S060 | <<locked>> | 90% | 55,463 psi | 89% | 2372 fps | 100% |
| Lovex S062 | <<locked>> | 94% | 55,477 psi | 89% | 2415 fps | 100% |
| Lovex S065ᴾ | <<locked>> | 100% | 54,549 psi | 87% | 2418 fps | 98.8% |
| Lovex S070ᴾ | <<locked>> | 100% | 51,895 psi | 83% | 2402 fps | 97.5% |
| Norma 201 | <<locked>> | 90% | 54,317 psi | 87% | 2388 fps | 100% |
| Norma 202 | <<locked>> | 90% | 54,795 psi | 88% | 2392 fps | 100% |
| Norma 203B | <<locked>> | 94% | 55,796 psi | 89% | 2461 fps | 100% |
| Norma URPᴾ | <<locked>> | 100% | 49,342 psi | 79% | 2421 fps | 99.1% |
| Ramshot Big Game | <<locked>> | 94% | 56,202 psi | 90% | 2487 fps | 100% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 48,341 psi | 78% | 2415 fps | 97.6% |
| Ramshot TAC | <<locked>> | 88% | 55,071 psi | 88% | 2415 fps | 99% |
| Ramshot Wild Boar | <<locked>> | 88% | 54,288 psi | 87% | 2428 fps | 99.9% |
| Ramshot X-Terminator | <<locked>> | 86% | 55,941 psi | 90% | 2402 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,447 psi | 57% | 1460 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 54,549 psi | 87% | 2382 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 94% | 54,621 psi | 88% | 2418 fps | 98.3% |
| ReloadSwiss RS 52 | <<locked>> | 90% | 53,229 psi | 85% | 2484 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 98% | 56,260 psi | 90% | 2559 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 48,994 psi | 79% | 2444 fps | 99% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 49,893 psi | 80% | 2467 fps | 98.7% |
| Rottweil R 901 | <<locked>> | 88% | 55,361 psi | 89% | 2369 fps | 100% |
| Rottweil R 902 | <<locked>> | 92% | 54,810 psi | 88% | 2388 fps | 100% |
| Rottweil R 903 | <<locked>> | 98% | 56,246 psi | 90% | 2457 fps | 100% |
| Rottweil R 907 | <<locked>> | 98% | 53,417 psi | 86% | 2392 fps | 96.9% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 54,549 psi | 87% | 2418 fps | 98.8% |
| Shooters World Match Rifle | <<locked>> | 90% | 54,795 psi | 88% | 2415 fps | 100% |
| Shooters World Precision | <<locked>> | 94% | 55,477 psi | 89% | 2415 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 51,895 psi | 83% | 2402 fps | 97.5% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 54,056 psi | 87% | 2352 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 96% | 54,447 psi | 87% | 2470 fps | 100% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 54,215 psi | 87% | 2329 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 88% | 53,447 psi | 86% | 2395 fps | 99.1% |
| SNPE Vectan SP 9 | <<locked>> | 90% | 53,780 psi | 86% | 2415 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 90% | 56,434 psi | 90% | 2336 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 96% | 55,883 psi | 90% | 2333 fps | 100% |
| SNPE Vectan Tubal 7000ᴾ | <<locked>> | 100% | 55,085 psi | 88% | 2375 fps | 97.7% |
| Somchem S321 | <<locked>> | 86% | 55,999 psi | 90% | 2428 fps | 100% |
| Somchem S335 | <<locked>> | 90% | 55,390 psi | 89% | 2336 fps | 100% |
| Somchem S341 | <<locked>> | 90% | 56,347 psi | 90% | 2431 fps | 100% |
| Somchem S355 | <<locked>> | 96% | 53,330 psi | 86% | 2415 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 43,961 psi | 70% | 2379 fps | 100% |
| Vihtavuori N130 | <<locked>> | 86% | 56,275 psi | 90% | 2303 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 53,040 psi | 85% | 2283 fps | 100% |
| Vihtavuori N135 | <<locked>> | 92% | 53,998 psi | 87% | 2352 fps | 100% |
| Vihtavuori N140 | <<locked>> | 92% | 55,303 psi | 89% | 2372 fps | 100% |
| Vihtavuori N150 | <<locked>> | 98% | 54,795 psi | 88% | 2398 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 51,895 psi | 83% | 2418 fps | 99.3% |
| Vihtavuori N530 | <<locked>> | 88% | 55,317 psi | 89% | 2395 fps | 100% |
| Vihtavuori N540 | <<locked>> | 92% | 53,171 psi | 85% | 2372 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 50,850 psi | 82% | 2425 fps | 99.1% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 36,854 psi | 59% | 2270 fps | 97.5% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 52,591 psi | 84% | 2405 fps | 100% |
| Winchester 748 | <<locked>> | 88% | 54,795 psi | 88% | 2438 fps | 100% |
| Winchester 760ᴾ | <<locked>> | 100% | 53,185 psi | 85% | 2477 fps | 97.7% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 30,777 psi | 49% | 2185 fps | 96.5% |
| Winchester StaBALL Match | <<locked>> | 90% | 53,461 psi | 86% | 2421 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% | 44,454 psi | 71% | 2195 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 48,370 psi | 78% | 2290 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 36,999 psi | 59% | 2133 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 43,497 psi | 70% | 2257 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 47,906 psi | 77% | 2277 fps | 95.5% |
| Accurate 4064 | <<locked>> | 80% | 35,012 psi | 56% | 2126 fps | 99.9% |
| Accurate 4350 | <<locked>> | 88% | 32,895 psi | 53% | 2146 fps | 95.5% |
| Accurate LT-30 | <<locked>> | 80% | 52,678 psi | 84% | 2257 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 53,098 psi | 85% | 2280 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 40,712 psi | 65% | 2218 fps | 98.7% |
| ADI AR 2208 | <<locked>> | 80% | 34,693 psi | 56% | 2090 fps | 96.5% |
| ADI Benchmark 8208 | <<locked>> | 80% | 42,714 psi | 68% | 2224 fps | 99.6% |
| Alliant AR-Comp | <<locked>> | 80% | 42,438 psi | 68% | 2218 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 49,705 psi | 80% | 2395 fps | 99.9% |
| Alliant Power Pro 2000-MR | 47.4 gr | 80% | 36,651 psi | 59% | 2234 fps | 96.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 34,011 psi | 55% | 2113 fps | 98% |
| Alliant Reloder-10x | <<locked>> | 80% | 50,053 psi | 80% | 2270 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 36,535 psi | 59% | 2162 fps | 97.3% |
| Alliant Reloder-16 | <<locked>> | 88% | 33,953 psi | 54% | 2159 fps | 95.6% |
| Alliant Reloder-17 | <<locked>> | 80% | 29,283 psi | 47% | 2077 fps | 95.5% |
| Alliant Reloder-23 | <<locked>> | 94% | 28,921 psi | 46% | 2070 fps | 95% |
| Alliant Reloder-26 | <<locked>> | 98% | 35,259 psi | 57% | 2270 fps | 95% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 51,605 psi | 83% | 2257 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 39,581 psi | 63% | 2218 fps | 97.5% |
| Bofors RP3 | <<locked>> | 80% | 33,330 psi | 53% | 2113 fps | 98% |
| Bofors RP7 | <<locked>> | 92% | 44,643 psi | 72% | 2264 fps | 95% |
| Hodgdon Benchmark | <<locked>> | 80% | 44,831 psi | 72% | 2221 fps | 99.9% |
| Hodgdon BL-C2 | <<locked>> | 80% | 40,973 psi | 66% | 2244 fps | 99.8% |
| Hodgdon CFE223 | <<locked>> | 80% | 45,223 psi | 73% | 2362 fps | 99.1% |
| Hodgdon H322 | <<locked>> | 80% | 48,892 psi | 78% | 2306 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 49,617 psi | 80% | 2329 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 34,403 psi | 55% | 2113 fps | 95.2% |
| Hodgdon H414 | <<locked>> | 94% | 43,598 psi | 70% | 2333 fps | 95.6% |
| Hodgdon H4350 | <<locked>> | 94% | 47,892 psi | 77% | 2349 fps | 95% |
| Hodgdon H4895 | <<locked>> | 80% | 41,017 psi | 66% | 2228 fps | 99.1% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 29,124 psi | 47% | 2028 fps | 95.6% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 36,883 psi | 59% | 2201 fps | 98.8% |
| Hodgdon Superformance | <<locked>> | 96% | 46,847 psi | 75% | 2398 fps | 95.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,107 psi | 42% | 1270 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 39,523 psi | 63% | 2188 fps | 98.8% |
| IMR 3031 | <<locked>> | 80% | 40,306 psi | 65% | 2224 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 36,376 psi | 58% | 2119 fps | 97.3% |
| IMR 4166 Enduron | <<locked>> | 84% | 44,106 psi | 71% | 2224 fps | 95.5% |
| IMR 4198 | <<locked>> | 80% | 50,415 psi | 81% | 2234 fps | 100% |
| IMR 4350 | <<locked>> | 98% | 47,210 psi | 76% | 2326 fps | 95.7% |
| IMR 4451 Enduron | <<locked>> | 90% | 43,700 psi | 70% | 2247 fps | 95.3% |
| IMR 4831 | <<locked>> | 88% | 32,140 psi | 52% | 2113 fps | 95.2% |
| IMR 4895 | <<locked>> | 80% | 37,391 psi | 60% | 2188 fps | 98.1% |
| IMR 8208 XBR | <<locked>> | 80% | 42,714 psi | 68% | 2224 fps | 99.6% |
| Lovex D073.5 | <<locked>> | 80% | 48,095 psi | 77% | 2297 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 39,378 psi | 63% | 2201 fps | 99.9% |
| Lovex S060 | <<locked>> | 80% | 41,191 psi | 66% | 2165 fps | 98.7% |
| Lovex S062 | <<locked>> | 80% | 36,187 psi | 58% | 2126 fps | 98.8% |
| Lovex S065 | <<locked>> | 88% | 37,840 psi | 61% | 2159 fps | 95.3% |
| Lovex S070 | <<locked>> | 94% | 43,149 psi | 69% | 2270 fps | 95.6% |
| Norma 201 | <<locked>> | 80% | 40,089 psi | 64% | 2182 fps | 99.4% |
| Norma 202 | <<locked>> | 80% | 40,103 psi | 64% | 2188 fps | 100% |
| Norma 203B | <<locked>> | 80% | 35,926 psi | 58% | 2152 fps | 97.7% |
| Norma URP | <<locked>> | 88% | 33,779 psi | 54% | 2152 fps | 95.5% |
| Ramshot Big Game | <<locked>> | 80% | 35,273 psi | 57% | 2162 fps | 97.3% |
| Ramshot Hunter | <<locked>> | 94% | 39,885 psi | 64% | 2274 fps | 95.4% |
| Ramshot TAC | <<locked>> | 80% | 42,540 psi | 68% | 2228 fps | 96.8% |
| Ramshot Wild Boar | <<locked>> | 80% | 41,872 psi | 67% | 2247 fps | 98.8% |
| Ramshot X-Terminator | <<locked>> | 80% | 46,108 psi | 74% | 2267 fps | 99.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,397 psi | 42% | 1302 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 47,921 psi | 77% | 2293 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 39,653 psi | 64% | 2188 fps | 95% |
| ReloadSwiss RS 52 | 46 gr | 80% | 37,927 psi | 61% | 2244 fps | 97.7% |
| ReloadSwiss RS 60 | 46.7 gr | 80% | 31,183 psi | 50% | 2133 fps | 98.8% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 35,172 psi | 56% | 2208 fps | 95.7% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 38,348 psi | 61% | 2267 fps | 95.7% |
| Rottweil R 901 | <<locked>> | 80% | 43,859 psi | 70% | 2215 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 38,029 psi | 61% | 2139 fps | 99.1% |
| Rottweil R 903 | <<locked>> | 80% | 31,517 psi | 51% | 2067 fps | 97.1% |
| Rottweil R 907 | <<locked>> | 92% | 44,643 psi | 72% | 2264 fps | 95% |
| Shooters World Long Rifle | <<locked>> | 88% | 37,840 psi | 61% | 2159 fps | 95.3% |
| Shooters World Match Rifle | <<locked>> | 80% | 39,378 psi | 63% | 2201 fps | 99.9% |
| Shooters World Precision | <<locked>> | 80% | 36,187 psi | 58% | 2126 fps | 98.8% |
| Shooters World SW4350 | <<locked>> | 94% | 43,149 psi | 69% | 2270 fps | 95.6% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 50,502 psi | 81% | 2310 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 32,460 psi | 52% | 2106 fps | 96.4% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 50,836 psi | 82% | 2287 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 40,741 psi | 65% | 2205 fps | 97% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 39,262 psi | 63% | 2192 fps | 98.4% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 41,553 psi | 67% | 2142 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 34,301 psi | 55% | 2031 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 42,221 psi | 68% | 2198 fps | 95.1% |
| Somchem S321 | <<locked>> | 80% | 45,890 psi | 74% | 2293 fps | 99.9% |
| Somchem S335 | <<locked>> | 80% | 41,162 psi | 66% | 2146 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 40,321 psi | 65% | 2205 fps | 98.5% |
| Somchem S355 | <<locked>> | 80% | 32,547 psi | 52% | 2073 fps | 97.2% |
| Somchem S365 | <<locked>> | 82% | 24,990 psi | 40% | 1969 fps | 95% |
| Vihtavuori N130 | <<locked>> | 80% | 47,021 psi | 75% | 2195 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 41,771 psi | 67% | 2136 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 37,188 psi | 60% | 2126 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 38,029 psi | 61% | 2136 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 30,864 psi | 49% | 2021 fps | 98% |
| Vihtavuori N160 | <<locked>> | 86% | 33,185 psi | 53% | 2106 fps | 95.1% |
| Vihtavuori N530 | <<locked>> | 80% | 42,685 psi | 68% | 2221 fps | 99.7% |
| Vihtavuori N540 | <<locked>> | 80% | 36,448 psi | 58% | 2126 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 88% | 34,606 psi | 55% | 2156 fps | 95.5% |
| Vihtavuori N555 | <<locked>> | 94% | 30,487 psi | 49% | 2133 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 29,283 psi | 47% | 1998 fps | 95.7% |
| Winchester 748 | <<locked>> | 80% | 41,887 psi | 67% | 2260 fps | 99.9% |
| Winchester 760 | <<locked>> | 94% | 43,598 psi | 70% | 2333 fps | 95.6% |
| Winchester StaBALL HD | <<locked>> | 98% | 28,834 psi | 46% | 2129 fps | 95.1% |
| Winchester StaBALL Match | <<locked>> | 80% | 38,580 psi | 62% | 2198 fps | 98.8% |
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 107 powders for 8.5 x 55 Blaser loaded with the .338 | 250gr | Rhino Penetrator. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,559 fps; across all powders the maximum-charge window runs from 1,427 fps to 2,559 fps. Accurate 4350 gives the best case fill at 100 %, and 107 of the 107 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (430 MPa), the top charges use 49–90 %, leaving at least 10 % headroom. The 250.0 gr projectile in 0.338" calls for a 1:13.0 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 | Rhino Penetrator 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.