Load Specifications
Bullet Manufacturer:North Fork
Bullet Weight:225 gr
Bullet Diameter:0.338"
Bullet Length:<<locked>>
Caliber:8.5 x 63 load data
Case Length (l3):2.48"
Cartridge Length (C.O.L.):<<locked>>
Case Capacity:75.5 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 63 with .338 | 225gr | NorthFork Bonded Core bullet and 102 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 52 and ReloadSwiss RS 60.
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% | 54,766 psi | 88% | 2470 fps | 100% |
| Accurate 2460 | <<locked>> | 84% | 52,953 psi | 85% | 2493 fps | 100% |
| Accurate 2495 | <<locked>> | 94% | 55,492 psi | 89% | 2526 fps | 100% |
| Accurate 2520 | <<locked>> | 88% | 54,563 psi | 87% | 2549 fps | 100% |
| Accurate 2700 | <<locked>> | 94% | 56,101 psi | 90% | 2523 fps | 96.1% |
| Accurate 4064 | <<locked>> | 96% | 55,288 psi | 89% | 2569 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 47,094 psi | 76% | 2530 fps | 98.1% |
| Accurate LT-30 | <<locked>> | 82% | 54,201 psi | 87% | 2418 fps | 100% |
| Accurate LT-32 | <<locked>> | 82% | 54,607 psi | 88% | 2441 fps | 100% |
| ADI AR 2206H | <<locked>> | 90% | 53,635 psi | 86% | 2556 fps | 99.7% |
| ADI AR 2208 | <<locked>> | 96% | 54,607 psi | 88% | 2552 fps | 99.4% |
| ADI AR 2219 | <<locked>> | 82% | 55,013 psi | 88% | 2530 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 90% | 56,347 psi | 90% | 2559 fps | 100% |
| Alliant AR-Comp | <<locked>> | 90% | 56,420 psi | 90% | 2539 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 84% | 54,578 psi | 88% | 2612 fps | 99.9% |
| Alliant Power Pro 2000-MR | <<locked>> | 94% | 56,376 psi | 90% | 2707 fps | 99.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 96% | 53,809 psi | 86% | 2572 fps | 99.9% |
| Alliant Reloder-10x | <<locked>> | 84% | 54,592 psi | 88% | 2474 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 94% | 54,534 psi | 87% | 2589 fps | 99.5% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 46,876 psi | 75% | 2536 fps | 98.3% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 54,128 psi | 87% | 2677 fps | 99.9% |
| Baschieri & Pellagri 106 | <<locked>> | 82% | 53,388 psi | 86% | 2421 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 90% | 53,185 psi | 85% | 2569 fps | 99.1% |
| Bofors RP3 | <<locked>> | 96% | 54,114 psi | 87% | 2585 fps | 100% |
| Bofors RP7ᴾ | <<locked>> | 100% | 55,056 psi | 88% | 2549 fps | 96.2% |
| Hodgdon Benchmark | <<locked>> | 88% | 54,955 psi | 88% | 2500 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 90% | 55,085 psi | 88% | 2589 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 86% | 53,272 psi | 85% | 2625 fps | 99.4% |
| Hodgdon H322 | <<locked>> | 84% | 53,519 psi | 86% | 2513 fps | 100% |
| Hodgdon H335 | <<locked>> | 84% | 54,433 psi | 87% | 2536 fps | 100% |
| Hodgdon H380 | <<locked>> | 96% | 55,593 psi | 89% | 2592 fps | 98.9% |
| Hodgdon H414ᴾ | <<locked>> | 100% | 50,836 psi | 82% | 2579 fps | 96.2% |
| Hodgdon H4895 | <<locked>> | 90% | 54,128 psi | 87% | 2566 fps | 99.9% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 42,975 psi | 69% | 2431 fps | 98.7% |
| Hodgdon LEVERevolution | <<locked>> | 94% | 56,275 psi | 90% | 2641 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,795 psi | 56% | 1516 fps | 100% |
| Hodgdon VARGET | <<locked>> | 92% | 55,521 psi | 89% | 2569 fps | 99.9% |
| IMR 3031 | <<locked>> | 90% | 53,417 psi | 86% | 2552 fps | 100% |
| IMR 4064 | <<locked>> | 94% | 53,969 psi | 87% | 2536 fps | 99.5% |
| IMR 4166 Enduron | <<locked>> | 92% | 54,723 psi | 88% | 2516 fps | 96.8% |
| IMR 4198 | <<locked>> | 84% | 54,940 psi | 88% | 2438 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 98% | 53,722 psi | 86% | 2533 fps | 96.5% |
| IMR 4831ᴾ | <<locked>> | 100% | 45,179 psi | 72% | 2480 fps | 97.8% |
| IMR 4895 | <<locked>> | 94% | 55,869 psi | 90% | 2618 fps | 99.8% |
| IMR 8208 XBR | <<locked>> | 90% | 56,347 psi | 90% | 2559 fps | 100% |
| Lovex D073.5 | <<locked>> | 84% | 53,026 psi | 85% | 2503 fps | 100% |
| Lovex D073.6 | <<locked>> | 92% | 56,246 psi | 90% | 2582 fps | 100% |
| Lovex S060 | <<locked>> | 90% | 53,954 psi | 87% | 2493 fps | 99.7% |
| Lovex S062 | <<locked>> | 94% | 53,403 psi | 86% | 2533 fps | 100% |
| Lovex S065ᴾ | <<locked>> | 100% | 52,504 psi | 84% | 2526 fps | 97.7% |
| Lovex S070ᴾ | <<locked>> | 100% | 49,748 psi | 80% | 2503 fps | 96.1% |
| Norma 201 | <<locked>> | 92% | 55,738 psi | 89% | 2552 fps | 100% |
| Norma 202 | <<locked>> | 92% | 56,144 psi | 90% | 2556 fps | 100% |
| Norma 203B | <<locked>> | 94% | 53,679 psi | 86% | 2579 fps | 99.7% |
| Norma URPᴾ | <<locked>> | 100% | 47,108 psi | 76% | 2523 fps | 98% |
| Ramshot Big Game | <<locked>> | 94% | 53,998 psi | 87% | 2602 fps | 99.6% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 46,557 psi | 75% | 2516 fps | 96.1% |
| Ramshot TAC | <<locked>> | 88% | 53,432 psi | 86% | 2530 fps | 98% |
| Ramshot Wild Boar | <<locked>> | 90% | 55,999 psi | 90% | 2595 fps | 99.8% |
| Ramshot X-Terminator | <<locked>> | 86% | 53,983 psi | 87% | 2516 fps | 99.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,186 psi | 56% | 1555 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 86% | 55,956 psi | 90% | 2543 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 96% | 56,391 psi | 90% | 2579 fps | 97.7% |
| ReloadSwiss RS 52 | <<locked>> | 92% | 54,578 psi | 88% | 2648 fps | 99.5% |
| ReloadSwiss RS 60 | <<locked>> | 98% | 54,143 psi | 87% | 2680 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 46,746 psi | 75% | 2546 fps | 97.8% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 48,066 psi | 77% | 2569 fps | 97.3% |
| Rottweil R 901 | <<locked>> | 88% | 53,461 psi | 86% | 2493 fps | 100% |
| Rottweil R 902 | <<locked>> | 94% | 56,202 psi | 90% | 2549 fps | 100% |
| Rottweil R 903 | <<locked>> | 98% | 53,635 psi | 86% | 2572 fps | 99.9% |
| Rottweil R 907ᴾ | <<locked>> | 100% | 55,056 psi | 88% | 2549 fps | 96.2% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 52,504 psi | 84% | 2526 fps | 97.7% |
| Shooters World Match Rifle | <<locked>> | 92% | 56,246 psi | 90% | 2582 fps | 100% |
| Shooters World Precision | <<locked>> | 94% | 53,403 psi | 86% | 2533 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 49,748 psi | 80% | 2503 fps | 96.1% |
| Shooters World Tactical Rifle | <<locked>> | 84% | 56,014 psi | 90% | 2520 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 82% | 55,245 psi | 89% | 2539 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 98% | 55,535 psi | 89% | 2631 fps | 99.8% |
| SNPE Vectan SP 3 | <<locked>> | 84% | 55,506 psi | 89% | 2493 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 90% | 54,839 psi | 88% | 2552 fps | 98.7% |
| SNPE Vectan SP 9 | <<locked>> | 92% | 55,288 psi | 89% | 2575 fps | 99.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 90% | 54,462 psi | 87% | 2457 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 96% | 53,925 psi | 86% | 2454 fps | 100% |
| SNPE Vectan Tubal 7000ᴾ | <<locked>> | 100% | 52,997 psi | 85% | 2484 fps | 96.4% |
| Somchem S321 | <<locked>> | 86% | 54,085 psi | 87% | 2549 fps | 100% |
| Somchem S335 | <<locked>> | 90% | 53,417 psi | 86% | 2457 fps | 100% |
| Somchem S341 | <<locked>> | 90% | 54,317 psi | 87% | 2549 fps | 99.6% |
| Somchem S355 | <<locked>> | 98% | 54,346 psi | 87% | 2572 fps | 99.9% |
| Somchem S365ᴾ | <<locked>> | 100% | 41,930 psi | 67% | 2477 fps | 99.6% |
| Vihtavuori N130 | <<locked>> | 86% | 54,346 psi | 87% | 2428 fps | 100% |
| Vihtavuori N133 | <<locked>> | 90% | 54,433 psi | 87% | 2444 fps | 100% |
| Vihtavuori N135 | <<locked>> | 94% | 55,143 psi | 88% | 2516 fps | 100% |
| Vihtavuori N140 | <<locked>> | 92% | 53,287 psi | 85% | 2493 fps | 100% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 56,028 psi | 90% | 2556 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 49,530 psi | 79% | 2523 fps | 98.3% |
| Vihtavuori N530 | <<locked>> | 88% | 53,476 psi | 86% | 2516 fps | 100% |
| Vihtavuori N540 | <<locked>> | 94% | 54,563 psi | 87% | 2533 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 48,617 psi | 78% | 2530 fps | 98% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 50,705 psi | 81% | 2516 fps | 99.7% |
| Winchester 748 | <<locked>> | 90% | 56,333 psi | 90% | 2605 fps | 100% |
| Winchester 760ᴾ | <<locked>> | 100% | 50,836 psi | 82% | 2579 fps | 96.2% |
| Winchester StaBALL Match | <<locked>> | 92% | 55,071 psi | 88% | 2585 fps | 99.9% |
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% | 42,815 psi | 69% | 2310 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 46,514 psi | 75% | 2405 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 35,273 psi | 57% | 2231 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 41,655 psi | 67% | 2362 fps | 99.8% |
| Accurate 2700 | <<locked>> | 92% | 52,634 psi | 84% | 2474 fps | 95.4% |
| Accurate 4064 | <<locked>> | 80% | 33,359 psi | 53% | 2218 fps | 99.4% |
| Accurate 4350 | <<locked>> | 92% | 35,882 psi | 58% | 2329 fps | 95.3% |
| Accurate LT-30 | <<locked>> | 80% | 51,082 psi | 82% | 2379 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 51,474 psi | 83% | 2398 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 39,160 psi | 63% | 2320 fps | 97.5% |
| ADI AR 2208 | <<locked>> | 82% | 35,607 psi | 57% | 2231 fps | 95.7% |
| ADI AR 2219 | <<locked>> | 80% | 51,503 psi | 83% | 2487 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 80% | 41,205 psi | 66% | 2329 fps | 98.9% |
| Alliant AR-Comp | <<locked>> | 80% | 40,524 psi | 65% | 2329 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 47,761 psi | 77% | 2510 fps | 99.5% |
| Alliant Power Pro 2000-MR | 49.9 gr | 80% | 35,375 psi | 57% | 2326 fps | 95% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 32,634 psi | 52% | 2205 fps | 96.6% |
| Alliant Reloder-10x | <<locked>> | 80% | 48,399 psi | 78% | 2395 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 35,085 psi | 56% | 2254 fps | 95.8% |
| Alliant Reloder-16 | <<locked>> | 92% | 36,970 psi | 59% | 2343 fps | 95.4% |
| Alliant Reloder-17 | <<locked>> | 84% | 32,111 psi | 51% | 2260 fps | 95.4% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 50,053 psi | 80% | 2379 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 38,072 psi | 61% | 2316 fps | 96% |
| Bofors RP3 | <<locked>> | 80% | 31,792 psi | 51% | 2198 fps | 96.4% |
| Bofors RP7 | <<locked>> | 98% | 51,590 psi | 83% | 2500 fps | 95.5% |
| Hodgdon Benchmark | <<locked>> | 80% | 43,236 psi | 69% | 2326 fps | 99.5% |
| Hodgdon BL-C2 | <<locked>> | 80% | 39,436 psi | 63% | 2349 fps | 99.1% |
| Hodgdon CFE223 | <<locked>> | 80% | 43,323 psi | 69% | 2467 fps | 98% |
| Hodgdon H322 | <<locked>> | 80% | 47,108 psi | 76% | 2425 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 47,630 psi | 76% | 2444 fps | 100% |
| Hodgdon H380 | <<locked>> | 84% | 37,521 psi | 60% | 2300 fps | 95% |
| Hodgdon H414 | <<locked>> | 98% | 47,645 psi | 76% | 2530 fps | 95.4% |
| Hodgdon H4895 | <<locked>> | 80% | 39,479 psi | 63% | 2329 fps | 98.1% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 31,647 psi | 51% | 2201 fps | 95.4% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 35,375 psi | 57% | 2297 fps | 97.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,947 psi | 42% | 1355 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 38,101 psi | 61% | 2287 fps | 97.7% |
| IMR 3031 | <<locked>> | 80% | 38,696 psi | 62% | 2333 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 35,143 psi | 56% | 2215 fps | 95.8% |
| IMR 4166 Enduron | <<locked>> | 88% | 48,269 psi | 77% | 2421 fps | 95.4% |
| IMR 4198 | <<locked>> | 80% | 48,878 psi | 78% | 2359 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 94% | 47,659 psi | 76% | 2441 fps | 95.1% |
| IMR 4831 | <<locked>> | 94% | 37,217 psi | 60% | 2339 fps | 95.7% |
| IMR 4895 | <<locked>> | 80% | 35,897 psi | 58% | 2283 fps | 96.7% |
| IMR 8208 XBR | <<locked>> | 80% | 41,205 psi | 66% | 2329 fps | 98.9% |
| Lovex D073.5 | <<locked>> | 80% | 46,093 psi | 74% | 2408 fps | 99.9% |
| Lovex D073.6 | <<locked>> | 80% | 37,768 psi | 61% | 2303 fps | 99.5% |
| Lovex S060 | <<locked>> | 80% | 39,972 psi | 64% | 2270 fps | 97.7% |
| Lovex S062 | <<locked>> | 80% | 34,882 psi | 56% | 2224 fps | 97.7% |
| Lovex S065 | <<locked>> | 92% | 41,191 psi | 66% | 2343 fps | 95.1% |
| Lovex S070 | <<locked>> | 98% | 46,688 psi | 75% | 2454 fps | 95.3% |
| Norma 201 | <<locked>> | 80% | 38,508 psi | 62% | 2280 fps | 98.5% |
| Norma 202 | <<locked>> | 80% | 38,638 psi | 62% | 2293 fps | 99.8% |
| Norma 203B | <<locked>> | 80% | 34,476 psi | 55% | 2244 fps | 96.2% |
| Norma URP | <<locked>> | 92% | 36,622 psi | 59% | 2333 fps | 95.2% |
| Ramshot Big Game | <<locked>> | 80% | 33,939 psi | 54% | 2254 fps | 95.6% |
| Ramshot Hunter | <<locked>> | 98% | 43,468 psi | 70% | 2464 fps | 95.2% |
| Ramshot TAC | <<locked>> | 80% | 41,118 psi | 66% | 2329 fps | 95.3% |
| Ramshot Wild Boar | <<locked>> | 80% | 40,147 psi | 64% | 2346 fps | 97.7% |
| Ramshot X-Terminator | <<locked>> | 80% | 44,643 psi | 72% | 2375 fps | 98.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,194 psi | 42% | 1388 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 46,427 psi | 74% | 2411 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 46,398 psi | 74% | 2431 fps | 95.7% |
| ReloadSwiss RS 52 | 48.4 gr | 80% | 36,289 psi | 58% | 2339 fps | 96.1% |
| ReloadSwiss RS 60 | 49.1 gr | 80% | 29,979 psi | 48% | 2215 fps | 97.1% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 38,421 psi | 62% | 2398 fps | 95.6% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 42,032 psi | 67% | 2461 fps | 95.6% |
| Rottweil R 901 | <<locked>> | 80% | 42,380 psi | 68% | 2326 fps | 99.9% |
| Rottweil R 902 | <<locked>> | 80% | 36,767 psi | 59% | 2241 fps | 98.1% |
| Rottweil R 903 | <<locked>> | 80% | 29,979 psi | 48% | 2149 fps | 95.3% |
| Rottweil R 907 | <<locked>> | 98% | 51,590 psi | 83% | 2500 fps | 95.5% |
| Shooters World Long Rifle | <<locked>> | 92% | 41,191 psi | 66% | 2343 fps | 95.1% |
| Shooters World Match Rifle | <<locked>> | 80% | 37,768 psi | 61% | 2303 fps | 99.5% |
| Shooters World Precision | <<locked>> | 80% | 34,882 psi | 56% | 2224 fps | 97.7% |
| Shooters World SW4350 | <<locked>> | 98% | 46,688 psi | 75% | 2454 fps | 95.3% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 48,936 psi | 78% | 2425 fps | 99.6% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 51,590 psi | 83% | 2493 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 33,272 psi | 53% | 2244 fps | 95.5% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 49,139 psi | 79% | 2411 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 39,015 psi | 63% | 2300 fps | 95.4% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 37,855 psi | 61% | 2293 fps | 97.1% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 40,190 psi | 64% | 2247 fps | 99.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 33,054 psi | 53% | 2129 fps | 99.6% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 49,516 psi | 79% | 2434 fps | 95.7% |
| Somchem S321 | <<locked>> | 80% | 44,222 psi | 71% | 2402 fps | 99.5% |
| Somchem S335 | <<locked>> | 80% | 39,595 psi | 63% | 2251 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 38,798 psi | 62% | 2303 fps | 97.3% |
| Somchem S355 | <<locked>> | 80% | 31,111 psi | 50% | 2159 fps | 95.5% |
| Somchem S365 | <<locked>> | 88% | 28,747 psi | 46% | 2185 fps | 95.7% |
| Vihtavuori N130 | <<locked>> | 80% | 45,498 psi | 73% | 2310 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 40,321 psi | 65% | 2251 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 35,679 psi | 57% | 2231 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 36,434 psi | 58% | 2234 fps | 99.7% |
| Vihtavuori N150 | <<locked>> | 80% | 29,428 psi | 47% | 2106 fps | 96.4% |
| Vihtavuori N160 | <<locked>> | 92% | 38,508 psi | 62% | 2336 fps | 95.7% |
| Vihtavuori N530 | <<locked>> | 80% | 41,060 psi | 66% | 2326 fps | 99% |
| Vihtavuori N540 | <<locked>> | 80% | 35,114 psi | 56% | 2228 fps | 99.3% |
| Vihtavuori N550 | <<locked>> | 92% | 37,492 psi | 60% | 2336 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 32,155 psi | 52% | 2175 fps | 95.6% |
| Winchester 748 | <<locked>> | 80% | 40,147 psi | 64% | 2362 fps | 99.4% |
| Winchester 760 | <<locked>> | 98% | 47,645 psi | 76% | 2530 fps | 95.4% |
| Winchester StaBALL Match | <<locked>> | 80% | 36,970 psi | 59% | 2293 fps | 97.5% |
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 63 loaded with the .338 | 225gr | NorthFork Bonded Core. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,707 fps; across all powders the maximum-charge window runs from 1,516 fps to 2,707 fps. Accurate 4350 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 56–90 %, 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 52, ReloadSwiss RS 60 rank at the top here: for 8.5 x 63 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.