Load Specifications
Bullet:.338 | 225gr | Woodleigh HS
Bullet Manufacturer:Woodleigh
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:1:15.5
Load data in caliber 8.5 x 63 with .338 | 225gr | Woodleigh HS 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 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% | 55,201 psi | 89% | 2480 fps | 100% |
| Accurate 2460 | <<locked>> | 84% | 53,621 psi | 86% | 2507 fps | 100% |
| Accurate 2495 | <<locked>> | 94% | 56,217 psi | 90% | 2539 fps | 100% |
| Accurate 2520 | <<locked>> | 88% | 55,201 psi | 89% | 2562 fps | 100% |
| Accurate 4064 | <<locked>> | 96% | 55,941 psi | 90% | 2582 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 47,921 psi | 77% | 2546 fps | 98.3% |
| Accurate LT-30 | <<locked>> | 82% | 54,592 psi | 88% | 2428 fps | 100% |
| Accurate LT-32 | <<locked>> | 82% | 55,013 psi | 88% | 2451 fps | 100% |
| ADI AR 2206H | <<locked>> | 90% | 54,273 psi | 87% | 2569 fps | 99.7% |
| ADI AR 2208 | <<locked>> | 96% | 55,143 psi | 88% | 2566 fps | 99.5% |
| ADI AR 2219 | <<locked>> | 82% | 55,448 psi | 89% | 2539 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 88% | 53,461 psi | 86% | 2526 fps | 100% |
| Alliant AR-Comp | <<locked>> | 88% | 53,447 psi | 86% | 2507 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 84% | 55,056 psi | 88% | 2621 fps | 99.9% |
| Alliant Power Pro 2000-MR | <<locked>> | 92% | 53,374 psi | 86% | 2667 fps | 99.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 96% | 54,418 psi | 87% | 2582 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 84% | 55,056 psi | 88% | 2484 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 94% | 55,114 psi | 88% | 2602 fps | 99.6% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 47,326 psi | 76% | 2549 fps | 98.4% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 54,897 psi | 88% | 2690 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 82% | 53,693 psi | 86% | 2428 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 90% | 53,679 psi | 86% | 2579 fps | 99.2% |
| Bofors RP3 | <<locked>> | 96% | 54,665 psi | 88% | 2595 fps | 100% |
| Bofors RP7ᴾ | <<locked>> | 100% | 55,579 psi | 89% | 2562 fps | 96.4% |
| Hodgdon Benchmark | <<locked>> | 88% | 55,579 psi | 89% | 2513 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 90% | 55,637 psi | 89% | 2598 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 86% | 53,983 psi | 87% | 2638 fps | 99.5% |
| Hodgdon H322 | <<locked>> | 84% | 54,230 psi | 87% | 2526 fps | 100% |
| Hodgdon H335 | <<locked>> | 84% | 55,100 psi | 88% | 2549 fps | 100% |
| Hodgdon H380 | <<locked>> | 96% | 56,405 psi | 90% | 2612 fps | 99% |
| Hodgdon H414ᴾ | <<locked>> | 100% | 51,285 psi | 82% | 2592 fps | 96.4% |
| Hodgdon H4350ᴾ | <<locked>> | 100% | 56,202 psi | 90% | 2612 fps | 95.8% |
| Hodgdon H4895 | <<locked>> | 90% | 54,737 psi | 88% | 2579 fps | 99.9% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 43,671 psi | 70% | 2448 fps | 98.9% |
| Hodgdon LEVERevolution | <<locked>> | 92% | 53,374 psi | 86% | 2605 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,809 psi | 56% | 1522 fps | 100% |
| Hodgdon VARGET | <<locked>> | 92% | 56,115 psi | 90% | 2582 fps | 99.9% |
| IMR 3031 | <<locked>> | 90% | 54,143 psi | 87% | 2566 fps | 100% |
| IMR 4064 | <<locked>> | 94% | 54,578 psi | 88% | 2549 fps | 99.5% |
| IMR 4166 Enduron | <<locked>> | 92% | 55,245 psi | 89% | 2530 fps | 96.9% |
| IMR 4198 | <<locked>> | 84% | 55,477 psi | 89% | 2448 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 98% | 54,201 psi | 87% | 2546 fps | 96.7% |
| IMR 4831ᴾ | <<locked>> | 100% | 45,672 psi | 73% | 2493 fps | 98% |
| IMR 4895 | <<locked>> | 92% | 53,316 psi | 85% | 2585 fps | 99.7% |
| IMR 8208 XBR | <<locked>> | 88% | 53,461 psi | 86% | 2526 fps | 100% |
| Lovex D073.5 | <<locked>> | 84% | 53,388 psi | 86% | 2513 fps | 100% |
| Lovex D073.6 | <<locked>> | 90% | 53,330 psi | 86% | 2549 fps | 100% |
| Lovex S060 | <<locked>> | 90% | 54,244 psi | 87% | 2503 fps | 99.7% |
| Lovex S062 | <<locked>> | 94% | 54,012 psi | 87% | 2546 fps | 100% |
| Lovex S065ᴾ | <<locked>> | 100% | 53,026 psi | 85% | 2539 fps | 97.9% |
| Lovex S070ᴾ | <<locked>> | 100% | 50,241 psi | 81% | 2516 fps | 96.3% |
| Norma 201 | <<locked>> | 92% | 56,405 psi | 90% | 2566 fps | 100% |
| Norma 202 | <<locked>> | 90% | 53,287 psi | 85% | 2523 fps | 100% |
| Norma 203B | <<locked>> | 94% | 54,259 psi | 87% | 2592 fps | 99.8% |
| Norma URPᴾ | <<locked>> | 100% | 47,630 psi | 76% | 2536 fps | 98.2% |
| Ramshot Big Game | <<locked>> | 94% | 54,839 psi | 88% | 2618 fps | 99.7% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 46,905 psi | 75% | 2526 fps | 96.2% |
| Ramshot TAC | <<locked>> | 88% | 53,911 psi | 86% | 2543 fps | 98.2% |
| Ramshot Wild Boar | <<locked>> | 88% | 53,127 psi | 85% | 2559 fps | 99.6% |
| Ramshot X-Terminator | <<locked>> | 86% | 54,491 psi | 87% | 2530 fps | 99.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,201 psi | 56% | 1558 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 53,156 psi | 85% | 2513 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 94% | 53,417 psi | 86% | 2543 fps | 97.3% |
| ReloadSwiss RS 52 | <<locked>> | 92% | 55,230 psi | 89% | 2664 fps | 99.6% |
| ReloadSwiss RS 60 | <<locked>> | 98% | 54,650 psi | 88% | 2694 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 47,485 psi | 76% | 2562 fps | 98% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 48,675 psi | 78% | 2585 fps | 97.6% |
| Rottweil R 901 | <<locked>> | 88% | 54,186 psi | 87% | 2507 fps | 100% |
| Rottweil R 902 | <<locked>> | 92% | 53,301 psi | 85% | 2516 fps | 100% |
| Rottweil R 903 | <<locked>> | 98% | 54,563 psi | 87% | 2589 fps | 99.9% |
| Rottweil R 907ᴾ | <<locked>> | 100% | 55,579 psi | 89% | 2562 fps | 96.4% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 53,026 psi | 85% | 2539 fps | 97.9% |
| Shooters World Match Rifle | <<locked>> | 90% | 53,330 psi | 86% | 2549 fps | 100% |
| Shooters World Precision | <<locked>> | 94% | 54,012 psi | 87% | 2546 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 50,241 psi | 81% | 2516 fps | 96.3% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 52,837 psi | 85% | 2484 fps | 99.9% |
| SNPE Vectan SP 10 | <<locked>> | 82% | 55,941 psi | 90% | 2556 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 98% | 56,376 psi | 90% | 2644 fps | 99.8% |
| SNPE Vectan SP 3 | <<locked>> | 84% | 56,043 psi | 90% | 2503 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 90% | 55,666 psi | 89% | 2569 fps | 98.8% |
| SNPE Vectan SP 9 | <<locked>> | 92% | 55,854 psi | 90% | 2589 fps | 99.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 90% | 55,114 psi | 88% | 2470 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 96% | 54,476 psi | 87% | 2464 fps | 100% |
| SNPE Vectan Tubal 7000ᴾ | <<locked>> | 100% | 53,490 psi | 86% | 2497 fps | 96.6% |
| Somchem S321 | <<locked>> | 86% | 54,665 psi | 88% | 2562 fps | 100% |
| Somchem S335 | <<locked>> | 90% | 54,070 psi | 87% | 2467 fps | 100% |
| Somchem S341 | <<locked>> | 90% | 54,897 psi | 88% | 2559 fps | 99.7% |
| Somchem S355 | <<locked>> | 98% | 54,926 psi | 88% | 2582 fps | 99.9% |
| Somchem S365ᴾ | <<locked>> | 100% | 42,598 psi | 68% | 2497 fps | 99.7% |
| Vihtavuori N130 | <<locked>> | 86% | 54,810 psi | 88% | 2438 fps | 100% |
| Vihtavuori N133 | <<locked>> | 90% | 55,100 psi | 88% | 2457 fps | 100% |
| Vihtavuori N135 | <<locked>> | 94% | 55,854 psi | 90% | 2526 fps | 100% |
| Vihtavuori N140 | <<locked>> | 92% | 53,838 psi | 86% | 2507 fps | 100% |
| Vihtavuori N150 | <<locked>> | 98% | 53,229 psi | 85% | 2526 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 50,343 psi | 81% | 2539 fps | 98.5% |
| Vihtavuori N530 | <<locked>> | 88% | 54,099 psi | 87% | 2530 fps | 100% |
| Vihtavuori N540 | <<locked>> | 94% | 55,158 psi | 88% | 2543 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 49,356 psi | 79% | 2546 fps | 98.2% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 35,505 psi | 57% | 2369 fps | 96% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 51,300 psi | 82% | 2526 fps | 99.8% |
| Winchester 748 | <<locked>> | 88% | 53,142 psi | 85% | 2569 fps | 100% |
| Winchester 760ᴾ | <<locked>> | 100% | 51,576 psi | 83% | 2595 fps | 96.5% |
| Winchester StaBALL Match | <<locked>> | 92% | 55,593 psi | 89% | 2595 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% | 43,221 psi | 69% | 2320 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 46,905 psi | 75% | 2415 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 35,694 psi | 57% | 2244 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 42,076 psi | 67% | 2375 fps | 99.9% |
| Accurate 4064 | <<locked>> | 80% | 33,750 psi | 54% | 2231 fps | 99.5% |
| Accurate 4350 | <<locked>> | 92% | 36,434 psi | 58% | 2346 fps | 95.5% |
| Accurate LT-30 | <<locked>> | 80% | 51,503 psi | 83% | 2388 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 51,895 psi | 83% | 2408 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 39,755 psi | 64% | 2333 fps | 97.7% |
| ADI AR 2208 | <<locked>> | 80% | 33,895 psi | 54% | 2198 fps | 95.1% |
| ADI AR 2219 | <<locked>> | 80% | 51,953 psi | 83% | 2497 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 80% | 41,771 psi | 67% | 2346 fps | 99.1% |
| Alliant AR-Comp | <<locked>> | 80% | 41,031 psi | 66% | 2343 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 48,515 psi | 78% | 2526 fps | 99.6% |
| Alliant Power Pro 2000-MR | 50.4 gr | 80% | 35,650 psi | 57% | 2336 fps | 95.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 33,025 psi | 53% | 2215 fps | 96.8% |
| Alliant Reloder-10x | <<locked>> | 80% | 48,863 psi | 78% | 2405 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 35,650 psi | 57% | 2270 fps | 96% |
| Alliant Reloder-16 | <<locked>> | 92% | 37,202 psi | 60% | 2352 fps | 95.6% |
| Alliant Reloder-17 | <<locked>> | 84% | 32,503 psi | 52% | 2274 fps | 95.7% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 50,575 psi | 81% | 2388 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 38,609 psi | 62% | 2329 fps | 96.3% |
| Bofors RP3 | <<locked>> | 80% | 32,343 psi | 52% | 2215 fps | 96.7% |
| Bofors RP7 | <<locked>> | 96% | 49,168 psi | 79% | 2470 fps | 95% |
| Hodgdon Benchmark | <<locked>> | 80% | 43,598 psi | 70% | 2336 fps | 99.6% |
| Hodgdon BL-C2 | <<locked>> | 80% | 39,784 psi | 64% | 2356 fps | 99.2% |
| Hodgdon CFE223 | <<locked>> | 80% | 43,700 psi | 70% | 2477 fps | 98.2% |
| Hodgdon H322 | <<locked>> | 80% | 47,572 psi | 76% | 2434 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 48,269 psi | 77% | 2457 fps | 100% |
| Hodgdon H380 | <<locked>> | 84% | 38,029 psi | 61% | 2313 fps | 95.3% |
| Hodgdon H414 | <<locked>> | 98% | 48,080 psi | 77% | 2539 fps | 95.6% |
| Hodgdon H4350 | <<locked>> | 98% | 52,779 psi | 85% | 2559 fps | 95.1% |
| Hodgdon H4895 | <<locked>> | 80% | 40,089 psi | 64% | 2346 fps | 98.3% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 31,908 psi | 51% | 2211 fps | 95.6% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 35,882 psi | 58% | 2310 fps | 97.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,049 psi | 42% | 1362 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 38,435 psi | 62% | 2300 fps | 97.9% |
| IMR 3031 | <<locked>> | 80% | 39,160 psi | 63% | 2346 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 35,505 psi | 57% | 2228 fps | 96% |
| IMR 4166 Enduron | <<locked>> | 88% | 48,762 psi | 78% | 2434 fps | 95.6% |
| IMR 4198 | <<locked>> | 80% | 49,443 psi | 79% | 2372 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 94% | 48,167 psi | 77% | 2454 fps | 95.4% |
| IMR 4831 | <<locked>> | 92% | 35,302 psi | 57% | 2303 fps | 95.2% |
| IMR 4895 | <<locked>> | 80% | 36,463 psi | 58% | 2300 fps | 97% |
| IMR 8208 XBR | <<locked>> | 80% | 41,771 psi | 67% | 2346 fps | 99.1% |
| Lovex D073.5 | <<locked>> | 80% | 46,746 psi | 75% | 2421 fps | 99.9% |
| Lovex D073.6 | <<locked>> | 80% | 38,145 psi | 61% | 2316 fps | 99.5% |
| Lovex S060 | <<locked>> | 80% | 40,379 psi | 65% | 2283 fps | 97.9% |
| Lovex S062 | <<locked>> | 80% | 35,244 psi | 57% | 2234 fps | 97.9% |
| Lovex S065 | <<locked>> | 92% | 41,684 psi | 67% | 2356 fps | 95.4% |
| Lovex S070 | <<locked>> | 98% | 47,413 psi | 76% | 2474 fps | 95.6% |
| Norma 201 | <<locked>> | 80% | 38,885 psi | 62% | 2290 fps | 98.6% |
| Norma 202 | <<locked>> | 80% | 39,015 psi | 63% | 2306 fps | 99.9% |
| Norma 203B | <<locked>> | 80% | 35,056 psi | 56% | 2260 fps | 96.5% |
| Norma URP | <<locked>> | 92% | 37,101 psi | 59% | 2346 fps | 95.5% |
| Ramshot Big Game | <<locked>> | 80% | 34,258 psi | 55% | 2264 fps | 95.9% |
| Ramshot Hunter | <<locked>> | 98% | 44,077 psi | 71% | 2480 fps | 95.5% |
| Ramshot TAC | <<locked>> | 80% | 41,611 psi | 67% | 2343 fps | 95.6% |
| Ramshot Wild Boar | <<locked>> | 80% | 40,683 psi | 65% | 2359 fps | 97.9% |
| Ramshot X-Terminator | <<locked>> | 80% | 44,962 psi | 72% | 2385 fps | 98.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,281 psi | 42% | 1394 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 46,818 psi | 75% | 2421 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 44,048 psi | 71% | 2395 fps | 95.2% |
| ReloadSwiss RS 52 | 48.9 gr | 80% | 36,680 psi | 59% | 2352 fps | 96.4% |
| ReloadSwiss RS 60 | 49.7 gr | 80% | 30,385 psi | 49% | 2231 fps | 97.4% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 38,870 psi | 62% | 2411 fps | 95.8% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 42,409 psi | 68% | 2474 fps | 95.8% |
| Rottweil R 901 | <<locked>> | 80% | 42,772 psi | 69% | 2336 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 37,159 psi | 60% | 2251 fps | 98.3% |
| Rottweil R 903 | <<locked>> | 80% | 30,327 psi | 49% | 2162 fps | 95.6% |
| Rottweil R 907 | <<locked>> | 96% | 49,168 psi | 79% | 2470 fps | 95% |
| Shooters World Long Rifle | <<locked>> | 92% | 41,684 psi | 67% | 2356 fps | 95.4% |
| Shooters World Match Rifle | <<locked>> | 80% | 38,145 psi | 61% | 2316 fps | 99.5% |
| Shooters World Precision | <<locked>> | 80% | 35,244 psi | 57% | 2234 fps | 97.9% |
| Shooters World SW4350 | <<locked>> | 98% | 47,413 psi | 76% | 2474 fps | 95.6% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 49,255 psi | 79% | 2434 fps | 99.7% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 52,243 psi | 84% | 2507 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 33,562 psi | 54% | 2254 fps | 95.7% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 49,632 psi | 80% | 2421 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 39,537 psi | 63% | 2313 fps | 95.6% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 38,203 psi | 61% | 2303 fps | 97.3% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 40,553 psi | 65% | 2260 fps | 99.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 33,431 psi | 54% | 2142 fps | 99.7% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 46,760 psi | 75% | 2398 fps | 95.2% |
| Somchem S321 | <<locked>> | 80% | 44,817 psi | 72% | 2418 fps | 99.6% |
| Somchem S335 | <<locked>> | 80% | 39,987 psi | 64% | 2264 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 39,320 psi | 63% | 2320 fps | 97.5% |
| Somchem S355 | <<locked>> | 80% | 31,459 psi | 50% | 2172 fps | 95.7% |
| Somchem S365 | <<locked>> | 86% | 27,354 psi | 44% | 2149 fps | 95% |
| Vihtavuori N130 | <<locked>> | 80% | 45,963 psi | 74% | 2323 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 40,756 psi | 65% | 2260 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 36,129 psi | 58% | 2244 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 36,796 psi | 59% | 2247 fps | 99.8% |
| Vihtavuori N150 | <<locked>> | 80% | 29,776 psi | 48% | 2119 fps | 96.6% |
| Vihtavuori N160 | <<locked>> | 90% | 36,550 psi | 59% | 2300 fps | 95.2% |
| Vihtavuori N530 | <<locked>> | 80% | 41,684 psi | 67% | 2339 fps | 99.1% |
| Vihtavuori N540 | <<locked>> | 80% | 35,447 psi | 57% | 2238 fps | 99.4% |
| Vihtavuori N550 | <<locked>> | 92% | 37,942 psi | 61% | 2349 fps | 95.5% |
| Vihtavuori N555 | <<locked>> | 98% | 33,460 psi | 54% | 2326 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 32,503 psi | 52% | 2188 fps | 95.8% |
| Winchester 748 | <<locked>> | 80% | 40,727 psi | 65% | 2379 fps | 99.5% |
| Winchester 760 | <<locked>> | 98% | 48,356 psi | 78% | 2546 fps | 95.7% |
| Winchester StaBALL Match | <<locked>> | 80% | 37,304 psi | 60% | 2303 fps | 97.7% |
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 103 powders for 8.5 x 63 loaded with the .338 | 225gr | Woodleigh HS. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,694 fps; across all powders the maximum-charge window runs from 1,522 fps to 2,694 fps. Accurate 4350 gives the best case fill at 100 %, and 103 of the 103 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 1:15.5 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 63 with the .338 | 225gr | Woodleigh HS 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.