Load Specifications
Bullet Manufacturer:North Fork
Bullet Weight:225 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:1:15.0
Load data in caliber 8.5 x 55 Blaser with .338 | 225gr | NorthFork Bonded Core bullet and 104 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, ReloadSwiss RS 60 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>> | 88% | 55,883 psi | 90% | 2500 fps | 100% |
| Accurate 2460 | <<locked>> | 84% | 54,215 psi | 87% | 2526 fps | 100% |
| Accurate 2495 | <<locked>> | 92% | 53,534 psi | 86% | 2520 fps | 100% |
| Accurate 2520 | <<locked>> | 88% | 56,057 psi | 90% | 2585 fps | 100% |
| Accurate 2700 | <<locked>> | 92% | 53,824 psi | 86% | 2513 fps | 96% |
| Accurate 4064 | <<locked>> | 94% | 53,388 psi | 86% | 2562 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 48,718 psi | 78% | 2572 fps | 98.6% |
| Accurate LT-30 | <<locked>> | 82% | 55,274 psi | 89% | 2448 fps | 100% |
| Accurate LT-32 | <<locked>> | 82% | 55,695 psi | 89% | 2474 fps | 100% |
| ADI AR 2206H | <<locked>> | 90% | 54,795 psi | 88% | 2592 fps | 99.8% |
| ADI AR 2208 | <<locked>> | 96% | 55,651 psi | 89% | 2589 fps | 99.6% |
| ADI AR 2219 | <<locked>> | 82% | 56,130 psi | 90% | 2562 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 88% | 54,070 psi | 87% | 2549 fps | 100% |
| Alliant AR-Comp | <<locked>> | 88% | 54,244 psi | 87% | 2530 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 84% | 55,811 psi | 89% | 2644 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 92% | 54,070 psi | 87% | 2697 fps | 99.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 96% | 55,201 psi | 89% | 2608 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 84% | 55,840 psi | 90% | 2507 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 94% | 55,956 psi | 90% | 2628 fps | 99.7% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 48,211 psi | 77% | 2579 fps | 98.8% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 55,811 psi | 89% | 2720 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 33,997 psi | 55% | 2329 fps | 96.4% |
| Baschieri & Pellagri 106 | <<locked>> | 82% | 54,476 psi | 87% | 2451 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 90% | 54,404 psi | 87% | 2605 fps | 99.4% |
| Bofors RP3 | <<locked>> | 96% | 55,811 psi | 89% | 2625 fps | 100% |
| Bofors RP7ᴾ | <<locked>> | 100% | 56,246 psi | 90% | 2589 fps | 96.8% |
| Hodgdon Benchmark | <<locked>> | 88% | 56,159 psi | 90% | 2536 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 88% | 53,011 psi | 85% | 2579 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 86% | 54,810 psi | 88% | 2667 fps | 99.7% |
| Hodgdon H322 | <<locked>> | 84% | 54,926 psi | 88% | 2546 fps | 100% |
| Hodgdon H335 | <<locked>> | 84% | 55,956 psi | 90% | 2572 fps | 100% |
| Hodgdon H380 | <<locked>> | 94% | 53,679 psi | 86% | 2589 fps | 98.8% |
| Hodgdon H414ᴾ | <<locked>> | 100% | 52,272 psi | 84% | 2621 fps | 96.8% |
| Hodgdon H4895 | <<locked>> | 90% | 55,274 psi | 89% | 2602 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 44,324 psi | 71% | 2474 fps | 99.1% |
| Hodgdon LEVERevolution | <<locked>> | 92% | 54,186 psi | 87% | 2631 fps | 100% |
| Hodgdon Superformanceᴾ | <<locked>> | 100% | 53,635 psi | 86% | 2654 fps | 96.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,911 psi | 56% | 1532 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 53,476 psi | 86% | 2562 fps | 99.9% |
| IMR 3031 | <<locked>> | 90% | 54,824 psi | 88% | 2585 fps | 100% |
| IMR 4064 | <<locked>> | 94% | 55,361 psi | 89% | 2575 fps | 99.7% |
| IMR 4166 Enduron | <<locked>> | 92% | 55,956 psi | 90% | 2556 fps | 97.3% |
| IMR 4198 | <<locked>> | 84% | 55,956 psi | 90% | 2467 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 98% | 54,853 psi | 88% | 2572 fps | 97% |
| IMR 4831ᴾ | <<locked>> | 100% | 46,412 psi | 74% | 2520 fps | 98.3% |
| IMR 4895 | <<locked>> | 92% | 53,896 psi | 86% | 2612 fps | 99.8% |
| IMR 8208 XBR | <<locked>> | 88% | 54,070 psi | 87% | 2549 fps | 100% |
| Lovex D073.5 | <<locked>> | 84% | 54,302 psi | 87% | 2539 fps | 100% |
| Lovex D073.6 | <<locked>> | 90% | 54,172 psi | 87% | 2572 fps | 100% |
| Lovex S060 | <<locked>> | 90% | 55,071 psi | 88% | 2530 fps | 99.8% |
| Lovex S062 | <<locked>> | 94% | 54,824 psi | 88% | 2569 fps | 100% |
| Lovex S065ᴾ | <<locked>> | 100% | 53,722 psi | 86% | 2562 fps | 98.2% |
| Lovex S070ᴾ | <<locked>> | 100% | 51,169 psi | 82% | 2546 fps | 96.7% |
| Norma 201 | <<locked>> | 90% | 53,795 psi | 86% | 2546 fps | 100% |
| Norma 202 | <<locked>> | 90% | 53,911 psi | 86% | 2546 fps | 100% |
| Norma 203B | <<locked>> | 94% | 55,085 psi | 88% | 2615 fps | 99.9% |
| Norma URPᴾ | <<locked>> | 100% | 48,588 psi | 78% | 2569 fps | 98.5% |
| Ramshot Big Game | <<locked>> | 94% | 55,579 psi | 89% | 2644 fps | 99.8% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 47,761 psi | 77% | 2559 fps | 96.7% |
| Ramshot TAC | <<locked>> | 88% | 54,621 psi | 88% | 2569 fps | 98.5% |
| Ramshot Wild Boar | <<locked>> | 88% | 53,621 psi | 86% | 2582 fps | 99.7% |
| Ramshot X-Terminator | <<locked>> | 86% | 55,288 psi | 89% | 2556 fps | 99.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,317 psi | 57% | 1572 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 53,766 psi | 86% | 2536 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 94% | 54,085 psi | 87% | 2569 fps | 97.6% |
| ReloadSwiss RS 52 | <<locked>> | 92% | 56,173 psi | 90% | 2690 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 98% | 55,622 psi | 89% | 2720 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 48,385 psi | 78% | 2595 fps | 98.4% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 49,168 psi | 79% | 2612 fps | 97.9% |
| Rottweil R 901 | <<locked>> | 88% | 54,853 psi | 88% | 2530 fps | 100% |
| Rottweil R 902 | <<locked>> | 92% | 53,940 psi | 86% | 2539 fps | 100% |
| Rottweil R 903 | <<locked>> | 98% | 55,376 psi | 89% | 2612 fps | 100% |
| Rottweil R 907ᴾ | <<locked>> | 100% | 56,246 psi | 90% | 2589 fps | 96.8% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 53,722 psi | 86% | 2562 fps | 98.2% |
| Shooters World Match Rifle | <<locked>> | 90% | 54,172 psi | 87% | 2572 fps | 100% |
| Shooters World Precision | <<locked>> | 94% | 54,824 psi | 88% | 2569 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 51,169 psi | 82% | 2546 fps | 96.7% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 53,403 psi | 86% | 2507 fps | 99.9% |
| SNPE Vectan SP 11 | <<locked>> | 96% | 53,635 psi | 86% | 2625 fps | 99.8% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 53,243 psi | 85% | 2484 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 90% | 56,420 psi | 90% | 2595 fps | 99% |
| SNPE Vectan SP 9 | <<locked>> | 90% | 53,272 psi | 85% | 2566 fps | 99.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 90% | 55,709 psi | 89% | 2490 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 96% | 55,347 psi | 89% | 2487 fps | 100% |
| SNPE Vectan Tubal 7000ᴾ | <<locked>> | 100% | 54,534 psi | 87% | 2523 fps | 97% |
| Somchem S321 | <<locked>> | 86% | 55,463 psi | 89% | 2585 fps | 100% |
| Somchem S335 | <<locked>> | 90% | 54,882 psi | 88% | 2490 fps | 100% |
| Somchem S341 | <<locked>> | 90% | 55,637 psi | 89% | 2585 fps | 99.8% |
| Somchem S355 | <<locked>> | 98% | 56,043 psi | 90% | 2612 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 43,221 psi | 69% | 2520 fps | 99.8% |
| Vihtavuori N130 | <<locked>> | 86% | 55,506 psi | 89% | 2457 fps | 100% |
| Vihtavuori N133 | <<locked>> | 90% | 55,709 psi | 89% | 2477 fps | 100% |
| Vihtavuori N135 | <<locked>> | 92% | 53,272 psi | 85% | 2510 fps | 100% |
| Vihtavuori N140 | <<locked>> | 92% | 54,418 psi | 87% | 2526 fps | 100% |
| Vihtavuori N150 | <<locked>> | 98% | 54,012 psi | 87% | 2549 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 51,039 psi | 82% | 2566 fps | 98.8% |
| Vihtavuori N530 | <<locked>> | 88% | 54,650 psi | 88% | 2549 fps | 100% |
| Vihtavuori N540 | <<locked>> | 94% | 56,202 psi | 90% | 2572 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 49,980 psi | 80% | 2569 fps | 98.5% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 36,332 psi | 58% | 2402 fps | 96.5% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 52,040 psi | 83% | 2552 fps | 99.9% |
| Winchester 748 | <<locked>> | 88% | 54,056 psi | 87% | 2595 fps | 100% |
| Winchester 760ᴾ | <<locked>> | 100% | 52,489 psi | 84% | 2625 fps | 96.9% |
| Winchester StaBALL Match | <<locked>> | 92% | 56,420 psi | 90% | 2621 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% | 43,714 psi | 70% | 2339 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 47,543 psi | 76% | 2438 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 36,361 psi | 58% | 2267 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 42,685 psi | 68% | 2398 fps | 100% |
| Accurate 2700 | <<locked>> | 90% | 50,589 psi | 81% | 2464 fps | 95.3% |
| Accurate 4064 | <<locked>> | 80% | 34,374 psi | 55% | 2257 fps | 99.7% |
| Accurate 4350 | <<locked>> | 90% | 34,490 psi | 55% | 2320 fps | 95.1% |
| Accurate LT-30 | <<locked>> | 80% | 51,895 psi | 83% | 2405 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 52,301 psi | 84% | 2428 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 40,132 psi | 64% | 2356 fps | 98% |
| ADI AR 2208 | <<locked>> | 80% | 34,229 psi | 55% | 2218 fps | 95.5% |
| ADI AR 2219 | <<locked>> | 80% | 52,663 psi | 84% | 2516 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 80% | 42,163 psi | 68% | 2365 fps | 99.2% |
| Alliant AR-Comp | <<locked>> | 80% | 41,771 psi | 67% | 2365 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 49,008 psi | 79% | 2546 fps | 99.7% |
| Alliant Power Pro 2000-MR | 51.2 gr | 80% | 36,318 psi | 58% | 2369 fps | 95.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 33,417 psi | 54% | 2238 fps | 97.1% |
| Alliant Reloder-10x | <<locked>> | 80% | 49,385 psi | 79% | 2425 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 36,027 psi | 58% | 2293 fps | 96.4% |
| Alliant Reloder-16 | <<locked>> | 90% | 35,563 psi | 57% | 2333 fps | 95.3% |
| Alliant Reloder-17 | <<locked>> | 82% | 30,763 psi | 49% | 2244 fps | 95.1% |
| Alliant Reloder-23 | <<locked>> | 98% | 32,155 psi | 52% | 2283 fps | 95.6% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 51,140 psi | 82% | 2408 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 39,117 psi | 63% | 2356 fps | 96.7% |
| Bofors RP3 | <<locked>> | 80% | 32,721 psi | 52% | 2238 fps | 97.1% |
| Bofors RP7 | <<locked>> | 96% | 49,835 psi | 80% | 2493 fps | 95.5% |
| Hodgdon Benchmark | <<locked>> | 80% | 44,208 psi | 71% | 2362 fps | 99.7% |
| Hodgdon BL-C2 | <<locked>> | 80% | 40,582 psi | 65% | 2385 fps | 99.4% |
| Hodgdon CFE223 | <<locked>> | 80% | 44,512 psi | 71% | 2507 fps | 98.5% |
| Hodgdon H322 | <<locked>> | 80% | 48,283 psi | 77% | 2457 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 48,892 psi | 78% | 2480 fps | 100% |
| Hodgdon H380 | <<locked>> | 84% | 38,580 psi | 62% | 2339 fps | 95.8% |
| Hodgdon H414 | <<locked>> | 96% | 45,788 psi | 73% | 2520 fps | 95.3% |
| Hodgdon H4895 | <<locked>> | 80% | 40,480 psi | 65% | 2365 fps | 98.5% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 30,530 psi | 49% | 2192 fps | 95.3% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 36,419 psi | 58% | 2336 fps | 98.1% |
| Hodgdon Superformance | <<locked>> | 98% | 49,763 psi | 80% | 2595 fps | 95.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,049 psi | 42% | 1368 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 39,015 psi | 63% | 2326 fps | 98.2% |
| IMR 3031 | <<locked>> | 80% | 39,682 psi | 64% | 2369 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 35,897 psi | 58% | 2251 fps | 96.4% |
| IMR 4166 Enduron | <<locked>> | 86% | 46,325 psi | 74% | 2408 fps | 95.3% |
| IMR 4198 | <<locked>> | 80% | 49,980 psi | 80% | 2392 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 92% | 45,948 psi | 74% | 2434 fps | 95.1% |
| IMR 4831 | <<locked>> | 92% | 35,955 psi | 58% | 2333 fps | 95.7% |
| IMR 4895 | <<locked>> | 80% | 36,869 psi | 59% | 2320 fps | 97.3% |
| IMR 8208 XBR | <<locked>> | 80% | 42,163 psi | 68% | 2365 fps | 99.2% |
| Lovex D073.5 | <<locked>> | 80% | 47,326 psi | 76% | 2444 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 38,769 psi | 62% | 2339 fps | 99.7% |
| Lovex S060 | <<locked>> | 80% | 40,712 psi | 65% | 2303 fps | 98.1% |
| Lovex S062 | <<locked>> | 80% | 35,650 psi | 57% | 2254 fps | 98.1% |
| Lovex S065 | <<locked>> | 90% | 39,827 psi | 64% | 2336 fps | 95.1% |
| Lovex S070 | <<locked>> | 96% | 45,150 psi | 72% | 2451 fps | 95.3% |
| Norma 201 | <<locked>> | 80% | 39,494 psi | 63% | 2316 fps | 98.9% |
| Norma 202 | <<locked>> | 80% | 39,436 psi | 63% | 2326 fps | 99.9% |
| Norma 203B | <<locked>> | 80% | 35,418 psi | 57% | 2283 fps | 96.8% |
| Norma URP | <<locked>> | 90% | 35,244 psi | 57% | 2323 fps | 95.1% |
| Ramshot Big Game | <<locked>> | 80% | 34,882 psi | 56% | 2293 fps | 96.4% |
| Ramshot Hunter | <<locked>> | 96% | 42,003 psi | 67% | 2457 fps | 95.1% |
| Ramshot TAC | <<locked>> | 80% | 42,105 psi | 68% | 2365 fps | 96% |
| Ramshot Wild Boar | <<locked>> | 80% | 41,249 psi | 66% | 2385 fps | 98.2% |
| Ramshot X-Terminator | <<locked>> | 80% | 45,716 psi | 73% | 2411 fps | 98.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,281 psi | 42% | 1401 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 47,427 psi | 76% | 2444 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 44,715 psi | 72% | 2425 fps | 95.6% |
| ReloadSwiss RS 52 | 49.6 gr | 80% | 37,289 psi | 60% | 2379 fps | 96.8% |
| ReloadSwiss RS 60 | 50.4 gr | 80% | 30,806 psi | 49% | 2257 fps | 97.9% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 37,057 psi | 59% | 2388 fps | 95.5% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 40,306 psi | 65% | 2448 fps | 95.4% |
| Rottweil R 901 | <<locked>> | 80% | 43,236 psi | 69% | 2359 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 37,536 psi | 60% | 2274 fps | 98.5% |
| Rottweil R 903 | <<locked>> | 80% | 30,879 psi | 50% | 2188 fps | 96% |
| Rottweil R 907 | <<locked>> | 96% | 49,835 psi | 80% | 2493 fps | 95.5% |
| Shooters World Long Rifle | <<locked>> | 90% | 39,827 psi | 64% | 2336 fps | 95.1% |
| Shooters World Match Rifle | <<locked>> | 80% | 38,769 psi | 62% | 2339 fps | 99.7% |
| Shooters World Precision | <<locked>> | 80% | 35,650 psi | 57% | 2254 fps | 98.1% |
| Shooters World SW4350 | <<locked>> | 96% | 45,150 psi | 72% | 2451 fps | 95.3% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 50,111 psi | 80% | 2461 fps | 99.8% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 31,995 psi | 51% | 2231 fps | 95.3% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 50,140 psi | 80% | 2441 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 40,045 psi | 64% | 2339 fps | 96% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 38,696 psi | 62% | 2326 fps | 97.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 41,002 psi | 66% | 2280 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 33,823 psi | 54% | 2162 fps | 99.8% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 47,703 psi | 76% | 2428 fps | 95.6% |
| Somchem S321 | <<locked>> | 80% | 45,382 psi | 73% | 2441 fps | 99.7% |
| Somchem S335 | <<locked>> | 80% | 40,553 psi | 65% | 2283 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 39,871 psi | 64% | 2343 fps | 97.8% |
| Somchem S355 | <<locked>> | 80% | 31,981 psi | 51% | 2198 fps | 96.2% |
| Somchem S365 | <<locked>> | 86% | 27,760 psi | 45% | 2175 fps | 95.6% |
| Vihtavuori N130 | <<locked>> | 80% | 46,427 psi | 74% | 2339 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 41,205 psi | 66% | 2280 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 36,579 psi | 59% | 2264 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 37,376 psi | 60% | 2270 fps | 99.9% |
| Vihtavuori N150 | <<locked>> | 80% | 30,255 psi | 49% | 2142 fps | 97.1% |
| Vihtavuori N160 | <<locked>> | 90% | 37,014 psi | 59% | 2326 fps | 95.6% |
| Vihtavuori N530 | <<locked>> | 80% | 42,047 psi | 67% | 2362 fps | 99.3% |
| Vihtavuori N540 | <<locked>> | 80% | 35,984 psi | 58% | 2260 fps | 99.6% |
| Vihtavuori N550 | <<locked>> | 90% | 36,260 psi | 58% | 2329 fps | 95.2% |
| Vihtavuori N555 | <<locked>> | 98% | 34,040 psi | 55% | 2352 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 30,937 psi | 50% | 2165 fps | 95.4% |
| Winchester 748 | <<locked>> | 80% | 41,365 psi | 66% | 2405 fps | 99.7% |
| Winchester 760 | <<locked>> | 96% | 46,035 psi | 74% | 2523 fps | 95.4% |
| Winchester StaBALL Match | <<locked>> | 80% | 37,826 psi | 61% | 2329 fps | 98% |
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 104 powders for 8.5 x 55 Blaser loaded with the .338 | 225gr | NorthFork Bonded Core. Alliant Reloder-17 delivers the highest muzzle velocity at 2,720 fps; across all powders the maximum-charge window runs from 1,532 fps to 2,720 fps. Accurate 4350 gives the best case fill at 100 %, and 104 of the 104 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 225.0 gr projectile in 0.338" calls for a 1:15.0 twist; slower twists will usually not stabilise this weight. Accurate 4350, Alliant Reloder-16, Alliant Reloder-17 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, ReloadSwiss RS 60, ReloadSwiss RS 52 rank at the top here: for 8.5 x 55 Blaser with the .338 | 225gr | NorthFork Bonded Core 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.