Load Specifications
Bullet Manufacturer:Nosler
Bullet Weight:230 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:1:14.5
Load data in caliber 8.5 x 63 with .338 | 230gr | Nosler CT FailSafe 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% | 54,331 psi | 87% | 2428 fps | 100% |
| Accurate 2460 | <<locked>> | 86% | 56,246 psi | 90% | 2497 fps | 100% |
| Accurate 2495 | <<locked>> | 94% | 55,303 psi | 89% | 2487 fps | 100% |
| Accurate 2520 | <<locked>> | 88% | 54,418 psi | 87% | 2510 fps | 100% |
| Accurate 2700 | <<locked>> | 94% | 55,912 psi | 90% | 2484 fps | 96.1% |
| Accurate 4064 | <<locked>> | 96% | 54,839 psi | 88% | 2526 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 46,905 psi | 75% | 2490 fps | 98.2% |
| Accurate LT-30 | <<locked>> | 82% | 54,201 psi | 87% | 2382 fps | 100% |
| Accurate LT-32 | <<locked>> | 82% | 54,607 psi | 88% | 2402 fps | 100% |
| ADI AR 2206H | <<locked>> | 90% | 53,476 psi | 86% | 2516 fps | 99.7% |
| ADI AR 2208 | <<locked>> | 96% | 54,230 psi | 87% | 2510 fps | 99.4% |
| ADI AR 2219 | <<locked>> | 82% | 54,621 psi | 88% | 2487 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 90% | 56,101 psi | 90% | 2520 fps | 100% |
| Alliant AR-Comp | <<locked>> | 90% | 56,072 psi | 90% | 2497 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 84% | 54,128 psi | 87% | 2566 fps | 99.9% |
| Alliant Power Pro 2000-MR | <<locked>> | 94% | 56,289 psi | 90% | 2664 fps | 99.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 96% | 53,476 psi | 86% | 2530 fps | 99.9% |
| Alliant Reloder-10x | <<locked>> | 84% | 54,317 psi | 87% | 2434 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 94% | 54,462 psi | 87% | 2549 fps | 99.5% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 46,630 psi | 75% | 2497 fps | 98.3% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 53,896 psi | 86% | 2635 fps | 99.9% |
| Baschieri & Pellagri 106 | <<locked>> | 82% | 53,185 psi | 85% | 2382 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 90% | 52,881 psi | 85% | 2526 fps | 99.1% |
| Bofors RP3 | <<locked>> | 96% | 53,780 psi | 86% | 2543 fps | 100% |
| Bofors RP7ᴾ | <<locked>> | 100% | 54,563 psi | 87% | 2507 fps | 96.2% |
| Hodgdon Benchmark | <<locked>> | 88% | 54,940 psi | 88% | 2464 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 90% | 54,781 psi | 88% | 2546 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 86% | 52,939 psi | 85% | 2582 fps | 99.5% |
| Hodgdon H322 | <<locked>> | 84% | 53,403 psi | 86% | 2474 fps | 100% |
| Hodgdon H335 | <<locked>> | 84% | 54,244 psi | 87% | 2497 fps | 100% |
| Hodgdon H380 | <<locked>> | 96% | 55,332 psi | 89% | 2552 fps | 98.9% |
| Hodgdon H414ᴾ | <<locked>> | 100% | 50,488 psi | 81% | 2539 fps | 96.2% |
| Hodgdon H4895 | <<locked>> | 90% | 53,911 psi | 86% | 2526 fps | 99.9% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 42,699 psi | 68% | 2392 fps | 98.7% |
| Hodgdon LEVERevolution | <<locked>> | 94% | 56,086 psi | 90% | 2602 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,911 psi | 56% | 1493 fps | 100% |
| Hodgdon VARGET | <<locked>> | 92% | 55,085 psi | 88% | 2526 fps | 99.9% |
| IMR 3031 | <<locked>> | 90% | 53,040 psi | 85% | 2510 fps | 100% |
| IMR 4064 | <<locked>> | 94% | 53,795 psi | 86% | 2497 fps | 99.5% |
| IMR 4166 Enduron | <<locked>> | 92% | 54,404 psi | 87% | 2474 fps | 96.8% |
| IMR 4198 | <<locked>> | 84% | 54,839 psi | 88% | 2398 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 98% | 53,519 psi | 86% | 2493 fps | 96.5% |
| IMR 4831ᴾ | <<locked>> | 100% | 44,788 psi | 72% | 2441 fps | 97.8% |
| IMR 4895 | <<locked>> | 94% | 55,869 psi | 90% | 2579 fps | 99.9% |
| IMR 8208 XBR | <<locked>> | 90% | 56,101 psi | 90% | 2520 fps | 100% |
| Lovex D073.5 | <<locked>> | 84% | 52,562 psi | 84% | 2461 fps | 100% |
| Lovex D073.6 | <<locked>> | 92% | 55,898 psi | 90% | 2539 fps | 100% |
| Lovex S060 | <<locked>> | 90% | 53,679 psi | 86% | 2454 fps | 99.7% |
| Lovex S062 | <<locked>> | 94% | 53,229 psi | 85% | 2493 fps | 100% |
| Lovex S065ᴾ | <<locked>> | 100% | 52,025 psi | 83% | 2484 fps | 97.7% |
| Lovex S070ᴾ | <<locked>> | 100% | 49,603 psi | 80% | 2467 fps | 96.1% |
| Norma 201 | <<locked>> | 92% | 55,579 psi | 89% | 2513 fps | 100% |
| Norma 202 | <<locked>> | 92% | 55,956 psi | 90% | 2516 fps | 100% |
| Norma 203B | <<locked>> | 94% | 53,592 psi | 86% | 2539 fps | 99.7% |
| Norma URPᴾ | <<locked>> | 100% | 46,949 psi | 75% | 2487 fps | 98.1% |
| Ramshot Big Game | <<locked>> | 94% | 53,882 psi | 86% | 2562 fps | 99.7% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 46,296 psi | 74% | 2477 fps | 96.1% |
| Ramshot TAC | <<locked>> | 88% | 53,127 psi | 85% | 2490 fps | 98% |
| Ramshot Wild Boar | <<locked>> | 90% | 55,724 psi | 89% | 2552 fps | 99.8% |
| Ramshot X-Terminator | <<locked>> | 86% | 53,838 psi | 86% | 2477 fps | 99.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,099 psi | 56% | 1526 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 86% | 55,651 psi | 89% | 2503 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 96% | 55,970 psi | 90% | 2536 fps | 97.7% |
| ReloadSwiss RS 52 | <<locked>> | 92% | 54,186 psi | 87% | 2605 fps | 99.5% |
| ReloadSwiss RS 60 | <<locked>> | 98% | 53,795 psi | 86% | 2638 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 46,514 psi | 75% | 2507 fps | 97.8% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 47,645 psi | 76% | 2526 fps | 97.3% |
| Rottweil R 901 | <<locked>> | 88% | 53,316 psi | 85% | 2454 fps | 100% |
| Rottweil R 902 | <<locked>> | 94% | 55,738 psi | 89% | 2507 fps | 100% |
| Rottweil R 903 | <<locked>> | 98% | 53,374 psi | 86% | 2530 fps | 99.9% |
| Rottweil R 907ᴾ | <<locked>> | 100% | 54,563 psi | 87% | 2507 fps | 96.2% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 52,025 psi | 83% | 2484 fps | 97.7% |
| Shooters World Match Rifle | <<locked>> | 92% | 55,898 psi | 90% | 2539 fps | 100% |
| Shooters World Precision | <<locked>> | 94% | 53,229 psi | 85% | 2493 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 49,603 psi | 80% | 2467 fps | 96.1% |
| Shooters World Tactical Rifle | <<locked>> | 84% | 55,782 psi | 89% | 2480 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 82% | 54,984 psi | 88% | 2500 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 98% | 55,477 psi | 89% | 2592 fps | 99.8% |
| SNPE Vectan SP 3 | <<locked>> | 84% | 55,245 psi | 89% | 2451 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 90% | 54,549 psi | 87% | 2513 fps | 98.7% |
| SNPE Vectan SP 9 | <<locked>> | 92% | 54,998 psi | 88% | 2533 fps | 99.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 90% | 54,360 psi | 87% | 2418 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 96% | 53,737 psi | 86% | 2415 fps | 100% |
| SNPE Vectan Tubal 7000ᴾ | <<locked>> | 100% | 52,562 psi | 84% | 2444 fps | 96.4% |
| Somchem S321 | <<locked>> | 86% | 53,693 psi | 86% | 2507 fps | 100% |
| Somchem S335 | <<locked>> | 90% | 53,185 psi | 85% | 2415 fps | 100% |
| Somchem S341 | <<locked>> | 90% | 54,085 psi | 87% | 2510 fps | 99.7% |
| Somchem S355 | <<locked>> | 98% | 54,056 psi | 87% | 2530 fps | 99.9% |
| Somchem S365ᴾ | <<locked>> | 100% | 41,756 psi | 67% | 2441 fps | 99.6% |
| Vihtavuori N130 | <<locked>> | 86% | 54,143 psi | 87% | 2388 fps | 100% |
| Vihtavuori N133 | <<locked>> | 90% | 54,360 psi | 87% | 2405 fps | 100% |
| Vihtavuori N135 | <<locked>> | 94% | 54,882 psi | 88% | 2474 fps | 100% |
| Vihtavuori N140 | <<locked>> | 94% | 56,362 psi | 90% | 2493 fps | 100% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 55,825 psi | 90% | 2516 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 49,429 psi | 79% | 2487 fps | 98.4% |
| Vihtavuori N530 | <<locked>> | 88% | 53,214 psi | 85% | 2474 fps | 100% |
| Vihtavuori N540 | <<locked>> | 94% | 54,288 psi | 87% | 2493 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 48,240 psi | 77% | 2487 fps | 98% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 50,299 psi | 81% | 2474 fps | 99.7% |
| Winchester 748 | <<locked>> | 90% | 56,014 psi | 90% | 2562 fps | 100% |
| Winchester 760ᴾ | <<locked>> | 100% | 50,488 psi | 81% | 2539 fps | 96.2% |
| Winchester StaBALL Match | <<locked>> | 92% | 54,795 psi | 88% | 2543 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% | 42,699 psi | 68% | 2274 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 46,137 psi | 74% | 2362 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 35,186 psi | 56% | 2198 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 41,321 psi | 66% | 2323 fps | 99.8% |
| Accurate 2700 | <<locked>> | 92% | 52,388 psi | 84% | 2434 fps | 95.4% |
| Accurate 4064 | <<locked>> | 80% | 33,301 psi | 53% | 2185 fps | 99.5% |
| Accurate 4350 | <<locked>> | 92% | 35,534 psi | 57% | 2290 fps | 95.3% |
| Accurate LT-30 | <<locked>> | 80% | 51,024 psi | 82% | 2339 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 51,416 psi | 82% | 2362 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 38,986 psi | 63% | 2280 fps | 97.6% |
| ADI AR 2208 | <<locked>> | 82% | 35,418 psi | 57% | 2195 fps | 95.7% |
| ADI AR 2219 | <<locked>> | 80% | 51,039 psi | 82% | 2444 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 80% | 40,973 psi | 66% | 2293 fps | 99% |
| Alliant AR-Comp | <<locked>> | 80% | 40,422 psi | 65% | 2293 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 47,485 psi | 76% | 2467 fps | 99.5% |
| Alliant Power Pro 2000-MR | 48.7 gr | 80% | 35,128 psi | 56% | 2287 fps | 95% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 32,387 psi | 52% | 2169 fps | 96.6% |
| Alliant Reloder-10x | <<locked>> | 80% | 48,254 psi | 77% | 2356 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 34,911 psi | 56% | 2218 fps | 95.8% |
| Alliant Reloder-16 | <<locked>> | 92% | 36,608 psi | 59% | 2303 fps | 95.4% |
| Alliant Reloder-17 | <<locked>> | 84% | 31,937 psi | 51% | 2224 fps | 95.5% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 49,777 psi | 80% | 2339 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 37,840 psi | 61% | 2280 fps | 96.1% |
| Bofors RP3 | <<locked>> | 80% | 31,604 psi | 51% | 2165 fps | 96.5% |
| Bofors RP7 | <<locked>> | 98% | 51,343 psi | 82% | 2461 fps | 95.5% |
| Hodgdon Benchmark | <<locked>> | 80% | 43,221 psi | 69% | 2293 fps | 99.6% |
| Hodgdon BL-C2 | <<locked>> | 80% | 39,131 psi | 63% | 2306 fps | 99.1% |
| Hodgdon CFE223 | <<locked>> | 80% | 43,076 psi | 69% | 2428 fps | 98.1% |
| Hodgdon H322 | <<locked>> | 80% | 46,876 psi | 75% | 2385 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 47,601 psi | 76% | 2408 fps | 100% |
| Hodgdon H380 | <<locked>> | 84% | 37,463 psi | 60% | 2264 fps | 95.2% |
| Hodgdon H414 | <<locked>> | 98% | 47,268 psi | 76% | 2487 fps | 95.4% |
| Hodgdon H4895 | <<locked>> | 80% | 39,247 psi | 63% | 2290 fps | 98.2% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 31,488 psi | 50% | 2165 fps | 95.4% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 35,259 psi | 57% | 2260 fps | 97.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,860 psi | 41% | 1329 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 37,884 psi | 61% | 2251 fps | 97.7% |
| IMR 3031 | <<locked>> | 80% | 38,406 psi | 62% | 2297 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 34,925 psi | 56% | 2178 fps | 95.9% |
| IMR 4166 Enduron | <<locked>> | 88% | 48,080 psi | 77% | 2382 fps | 95.4% |
| IMR 4198 | <<locked>> | 80% | 48,660 psi | 78% | 2320 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 94% | 47,311 psi | 76% | 2402 fps | 95.1% |
| IMR 4831 | <<locked>> | 92% | 34,679 psi | 56% | 2254 fps | 95% |
| IMR 4895 | <<locked>> | 80% | 35,694 psi | 57% | 2247 fps | 96.8% |
| IMR 8208 XBR | <<locked>> | 80% | 40,973 psi | 66% | 2293 fps | 99% |
| Lovex D073.5 | <<locked>> | 80% | 46,021 psi | 74% | 2369 fps | 99.9% |
| Lovex D073.6 | <<locked>> | 80% | 37,391 psi | 60% | 2264 fps | 99.5% |
| Lovex S060 | <<locked>> | 80% | 39,755 psi | 64% | 2231 fps | 97.7% |
| Lovex S062 | <<locked>> | 80% | 34,650 psi | 56% | 2185 fps | 97.7% |
| Lovex S065 | <<locked>> | 92% | 41,002 psi | 66% | 2306 fps | 95.2% |
| Lovex S070 | <<locked>> | 98% | 46,412 psi | 74% | 2418 fps | 95.4% |
| Norma 201 | <<locked>> | 80% | 38,479 psi | 62% | 2247 fps | 98.6% |
| Norma 202 | <<locked>> | 80% | 38,406 psi | 62% | 2257 fps | 99.8% |
| Norma 203B | <<locked>> | 80% | 34,287 psi | 55% | 2211 fps | 96.3% |
| Norma URP | <<locked>> | 92% | 36,289 psi | 58% | 2293 fps | 95.2% |
| Ramshot Big Game | <<locked>> | 80% | 33,678 psi | 54% | 2215 fps | 95.7% |
| Ramshot Hunter | <<locked>> | 98% | 43,366 psi | 70% | 2428 fps | 95.2% |
| Ramshot TAC | <<locked>> | 80% | 40,872 psi | 66% | 2290 fps | 95.4% |
| Ramshot Wild Boar | <<locked>> | 80% | 40,089 psi | 64% | 2313 fps | 97.8% |
| Ramshot X-Terminator | <<locked>> | 80% | 44,367 psi | 71% | 2336 fps | 98.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,107 psi | 42% | 1362 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 45,963 psi | 74% | 2369 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 46,079 psi | 74% | 2392 fps | 95.7% |
| ReloadSwiss RS 52 | 47.2 gr | 80% | 35,984 psi | 58% | 2300 fps | 96.2% |
| ReloadSwiss RS 60 | 48 gr | 80% | 29,892 psi | 48% | 2182 fps | 97.2% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 38,014 psi | 61% | 2356 fps | 95.6% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 41,814 psi | 67% | 2421 fps | 95.6% |
| Rottweil R 901 | <<locked>> | 80% | 42,264 psi | 68% | 2290 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 36,506 psi | 59% | 2201 fps | 98.1% |
| Rottweil R 903 | <<locked>> | 80% | 29,936 psi | 48% | 2119 fps | 95.5% |
| Rottweil R 907 | <<locked>> | 98% | 51,343 psi | 82% | 2461 fps | 95.5% |
| Shooters World Long Rifle | <<locked>> | 92% | 41,002 psi | 66% | 2306 fps | 95.2% |
| Shooters World Match Rifle | <<locked>> | 80% | 37,391 psi | 60% | 2264 fps | 99.5% |
| Shooters World Precision | <<locked>> | 80% | 34,650 psi | 56% | 2185 fps | 97.7% |
| Shooters World SW4350 | <<locked>> | 98% | 46,412 psi | 74% | 2418 fps | 95.4% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 48,588 psi | 78% | 2382 fps | 99.6% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 51,532 psi | 83% | 2454 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 33,040 psi | 53% | 2205 fps | 95.5% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 48,994 psi | 79% | 2372 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 38,957 psi | 62% | 2264 fps | 95.5% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 37,507 psi | 60% | 2254 fps | 97.1% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 40,074 psi | 64% | 2215 fps | 99.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 32,967 psi | 53% | 2096 fps | 99.6% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 49,269 psi | 79% | 2398 fps | 95.7% |
| Somchem S321 | <<locked>> | 80% | 43,947 psi | 70% | 2362 fps | 99.5% |
| Somchem S335 | <<locked>> | 80% | 39,566 psi | 63% | 2218 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 38,522 psi | 62% | 2264 fps | 97.3% |
| Somchem S355 | <<locked>> | 80% | 31,038 psi | 50% | 2129 fps | 95.6% |
| Somchem S365 | <<locked>> | 88% | 28,703 psi | 46% | 2156 fps | 95.8% |
| Vihtavuori N130 | <<locked>> | 80% | 45,411 psi | 73% | 2274 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 40,219 psi | 64% | 2215 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 35,534 psi | 57% | 2198 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 36,405 psi | 58% | 2201 fps | 99.8% |
| Vihtavuori N150 | <<locked>> | 80% | 29,428 psi | 47% | 2077 fps | 96.6% |
| Vihtavuori N160 | <<locked>> | 92% | 38,218 psi | 61% | 2297 fps | 95.8% |
| Vihtavuori N530 | <<locked>> | 80% | 40,872 psi | 66% | 2287 fps | 99% |
| Vihtavuori N540 | <<locked>> | 80% | 34,766 psi | 56% | 2188 fps | 99.3% |
| Vihtavuori N550 | <<locked>> | 92% | 37,434 psi | 60% | 2300 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 31,908 psi | 51% | 2139 fps | 95.6% |
| Winchester 748 | <<locked>> | 80% | 40,030 psi | 64% | 2326 fps | 99.4% |
| Winchester 760 | <<locked>> | 98% | 47,543 psi | 76% | 2490 fps | 95.5% |
| Winchester StaBALL Match | <<locked>> | 80% | 36,651 psi | 59% | 2254 fps | 97.6% |
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 | 230gr | Nosler CT FailSafe. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,664 fps; across all powders the maximum-charge window runs from 1,493 fps to 2,664 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 230.0 gr projectile in 0.338" calls for a 1:14.5 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 52, ReloadSwiss RS 60 rank at the top here: for 8.5 x 63 with the .338 | 230gr | Nosler CT FailSafe 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.