Load Specifications
Bullet Manufacturer:Barnes
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:1:12.5
Load data in caliber 8.5 x 63 with .338 | 225gr | Barnes TTSX BT bullet and 100 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, Hodgdon CFE223 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>> | 92% | 55,753 psi | 89% | 2457 fps | 100% |
| Accurate 2200 | <<locked>> | 82% | 53,258 psi | 85% | 2503 fps | 98.8% |
| Accurate 2230 | <<locked>> | 82% | 53,911 psi | 86% | 2516 fps | 99.1% |
| Accurate 2460 | <<locked>> | 88% | 54,317 psi | 87% | 2487 fps | 100% |
| Accurate 2495 | <<locked>> | 98% | 55,680 psi | 89% | 2510 fps | 100% |
| Accurate 2520 | <<locked>> | 92% | 55,840 psi | 90% | 2539 fps | 100% |
| Accurate 4064ᴾ | <<locked>> | 100% | 55,027 psi | 88% | 2543 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 40,828 psi | 65% | 2402 fps | 96.2% |
| Accurate LT-30 | <<locked>> | 84% | 53,374 psi | 86% | 2379 fps | 100% |
| Accurate LT-32 | <<locked>> | 84% | 53,824 psi | 86% | 2398 fps | 100% |
| ADI AR 2206H | <<locked>> | 94% | 54,969 psi | 88% | 2543 fps | 99.5% |
| ADI AR 2207 | <<locked>> | 82% | 54,592 psi | 88% | 2392 fps | 100% |
| ADI AR 2208ᴾ | <<locked>> | 100% | 55,782 psi | 89% | 2533 fps | 99.2% |
| ADI AR 2219 | <<locked>> | 84% | 53,432 psi | 86% | 2484 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 92% | 54,491 psi | 87% | 2507 fps | 99.9% |
| Alliant AR-Comp | <<locked>> | 92% | 53,766 psi | 86% | 2487 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 88% | 55,782 psi | 89% | 2598 fps | 99.8% |
| Alliant Power Pro 2000-MR | <<locked>> | 96% | 54,346 psi | 87% | 2638 fps | 99.1% |
| Alliant Reloder- TS 15.5ᴾ | <<locked>> | 100% | 54,476 psi | 87% | 2552 fps | 99.8% |
| Alliant Reloder-10x | <<locked>> | 88% | 56,202 psi | 90% | 2470 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 98% | 55,608 psi | 89% | 2572 fps | 99.3% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 42,148 psi | 68% | 2415 fps | 96.4% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 48,501 psi | 78% | 2556 fps | 99.2% |
| Alliant Reloder-7 | <<locked>> | 82% | 55,651 psi | 89% | 2411 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 86% | 55,622 psi | 89% | 2418 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 94% | 54,534 psi | 87% | 2556 fps | 98.8% |
| Bofors RP3ᴾ | <<locked>> | 100% | 54,795 psi | 88% | 2566 fps | 99.9% |
| Hodgdon Benchmark | <<locked>> | 90% | 53,679 psi | 86% | 2454 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 92% | 52,678 psi | 84% | 2530 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 90% | 54,795 psi | 88% | 2618 fps | 99.3% |
| Hodgdon H322 | <<locked>> | 88% | 55,419 psi | 89% | 2510 fps | 100% |
| Hodgdon H335 | <<locked>> | 86% | 52,692 psi | 84% | 2487 fps | 100% |
| Hodgdon H380 | <<locked>> | 98% | 53,229 psi | 85% | 2530 fps | 98.1% |
| Hodgdon H4198 | <<locked>> | 82% | 55,492 psi | 89% | 2421 fps | 100% |
| Hodgdon H4895 | <<locked>> | 94% | 55,477 psi | 89% | 2552 fps | 99.8% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 38,377 psi | 62% | 2316 fps | 97.1% |
| Hodgdon LEVERevolution | <<locked>> | 96% | 53,824 psi | 86% | 2582 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,156 psi | 55% | 1480 fps | 100% |
| Hodgdon VARGET | <<locked>> | 94% | 53,592 psi | 86% | 2513 fps | 99.6% |
| IMR 3031 | <<locked>> | 94% | 54,404 psi | 87% | 2543 fps | 100% |
| IMR 4064 | <<locked>> | 98% | 55,405 psi | 89% | 2520 fps | 99.3% |
| IMR 4166 Enduron | <<locked>> | 94% | 53,301 psi | 85% | 2457 fps | 95.7% |
| IMR 4198 | <<locked>> | 86% | 53,751 psi | 86% | 2395 fps | 100% |
| IMR 4831ᴾ | <<locked>> | 100% | 39,668 psi | 64% | 2362 fps | 95.9% |
| IMR 4895 | <<locked>> | 96% | 53,693 psi | 86% | 2559 fps | 99.5% |
| IMR 8208 XBR | <<locked>> | 92% | 54,491 psi | 87% | 2507 fps | 99.9% |
| Lovex D073.4 | <<locked>> | 82% | 54,520 psi | 87% | 2493 fps | 100% |
| Lovex D073.5 | <<locked>> | 88% | 54,360 psi | 87% | 2493 fps | 100% |
| Lovex D073.6 | <<locked>> | 94% | 53,447 psi | 86% | 2523 fps | 100% |
| Lovex S060 | <<locked>> | 94% | 55,593 psi | 89% | 2480 fps | 99.5% |
| Lovex S062 | <<locked>> | 98% | 54,375 psi | 87% | 2516 fps | 99.9% |
| Lovex S065ᴾ | <<locked>> | 100% | 46,905 psi | 75% | 2411 fps | 96% |
| Norma 200 | <<locked>> | 84% | 55,825 psi | 90% | 2444 fps | 100% |
| Norma 201 | <<locked>> | 94% | 53,505 psi | 86% | 2493 fps | 99.9% |
| Norma 202 | <<locked>> | 94% | 54,027 psi | 87% | 2503 fps | 100% |
| Norma 203B | <<locked>> | 98% | 54,621 psi | 88% | 2562 fps | 99.5% |
| Norma URPᴾ | <<locked>> | 100% | 41,698 psi | 67% | 2405 fps | 96.1% |
| Ramshot Big Game | <<locked>> | 98% | 55,390 psi | 89% | 2589 fps | 99.5% |
| Ramshot TAC | <<locked>> | 92% | 55,216 psi | 89% | 2520 fps | 97.8% |
| Ramshot Wild Boar | <<locked>> | 92% | 53,954 psi | 87% | 2536 fps | 99.4% |
| Ramshot X-Terminator | <<locked>> | 90% | 56,057 psi | 90% | 2510 fps | 99.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,476 psi | 55% | 1516 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 88% | 54,462 psi | 87% | 2497 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 98% | 54,244 psi | 87% | 2513 fps | 96.7% |
| ReloadSwiss RS 52 | <<locked>> | 96% | 55,724 psi | 89% | 2638 fps | 99.4% |
| ReloadSwiss RS 60ᴾ | <<locked>> | 100% | 51,909 psi | 83% | 2615 fps | 100% |
| Rottweil R 901 | <<locked>> | 92% | 54,346 psi | 87% | 2480 fps | 100% |
| Rottweil R 902 | <<locked>> | 96% | 53,722 psi | 86% | 2490 fps | 99.9% |
| Rottweil R 903ᴾ | <<locked>> | 100% | 50,749 psi | 81% | 2507 fps | 99.5% |
| Shooters World AR Plus | <<locked>> | 82% | 54,520 psi | 87% | 2493 fps | 100% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 46,905 psi | 75% | 2411 fps | 96% |
| Shooters World Match Rifle | <<locked>> | 94% | 53,447 psi | 86% | 2523 fps | 100% |
| Shooters World Precision | <<locked>> | 98% | 54,375 psi | 87% | 2516 fps | 99.9% |
| Shooters World Tactical Rifle | <<locked>> | 86% | 54,549 psi | 87% | 2470 fps | 99.8% |
| SNPE Vectan BA6 1/2 | <<locked>> | 82% | 54,389 psi | 87% | 2162 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 84% | 53,635 psi | 86% | 2493 fps | 100% |
| SNPE Vectan SP 11ᴾ | <<locked>> | 100% | 53,200 psi | 85% | 2569 fps | 99.3% |
| SNPE Vectan SP 3 | <<locked>> | 86% | 53,737 psi | 86% | 2444 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 92% | 52,736 psi | 85% | 2490 fps | 97.8% |
| SNPE Vectan SP 9 | <<locked>> | 94% | 53,214 psi | 85% | 2516 fps | 99.3% |
| SNPE Vectan Tubal 3000 | <<locked>> | 94% | 56,173 psi | 90% | 2448 fps | 100% |
| SNPE Vectan Tubal 5000ᴾ | <<locked>> | 100% | 55,564 psi | 89% | 2444 fps | 100% |
| Somchem S321 | <<locked>> | 90% | 55,637 psi | 89% | 2539 fps | 100% |
| Somchem S335 | <<locked>> | 94% | 54,940 psi | 88% | 2448 fps | 100% |
| Somchem S341 | <<locked>> | 94% | 55,898 psi | 90% | 2536 fps | 99.5% |
| Somchem S355ᴾ | <<locked>> | 100% | 51,677 psi | 83% | 2507 fps | 99.5% |
| Somchem S365ᴾ | <<locked>> | 100% | 36,985 psi | 59% | 2356 fps | 98.2% |
| Vihtavuori N120 | <<locked>> | 82% | 54,505 psi | 87% | 2346 fps | 100% |
| Vihtavuori N130 | <<locked>> | 90% | 56,144 psi | 90% | 2421 fps | 100% |
| Vihtavuori N133 | <<locked>> | 94% | 55,941 psi | 90% | 2434 fps | 100% |
| Vihtavuori N135 | <<locked>> | 98% | 56,173 psi | 90% | 2503 fps | 100% |
| Vihtavuori N140 | <<locked>> | 96% | 54,389 psi | 87% | 2484 fps | 100% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 49,995 psi | 80% | 2451 fps | 99.8% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 44,179 psi | 71% | 2408 fps | 96.6% |
| Vihtavuori N530 | <<locked>> | 92% | 54,940 psi | 88% | 2503 fps | 99.9% |
| Vihtavuori N540 | <<locked>> | 98% | 55,985 psi | 90% | 2523 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 43,018 psi | 69% | 2411 fps | 96.2% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 45,556 psi | 73% | 2402 fps | 98.7% |
| Winchester 748 | <<locked>> | 92% | 53,824 psi | 86% | 2546 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 94% | 52,692 psi | 84% | 2526 fps | 99.6% |
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% | 38,247 psi | 61% | 2218 fps | 100% |
| Accurate 2200 | <<locked>> | 80% | 49,835 psi | 80% | 2454 fps | 98.4% |
| Accurate 2230 | <<locked>> | 80% | 50,053 psi | 80% | 2461 fps | 98.7% |
| Accurate 2460 | <<locked>> | 80% | 41,495 psi | 67% | 2303 fps | 99.8% |
| Accurate 2495 | <<locked>> | 80% | 30,400 psi | 49% | 2126 fps | 99.9% |
| Accurate 2520 | <<locked>> | 80% | 36,825 psi | 59% | 2257 fps | 99.1% |
| Accurate 4064 | <<locked>> | 80% | 28,819 psi | 46% | 2110 fps | 98.1% |
| Accurate 4350 | <<locked>> | 98% | 37,913 psi | 61% | 2349 fps | 95.3% |
| Accurate LT-30 | <<locked>> | 80% | 47,166 psi | 76% | 2297 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 47,543 psi | 76% | 2313 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 35,186 psi | 56% | 2215 fps | 95.8% |
| ADI AR 2207 | <<locked>> | 80% | 51,372 psi | 82% | 2352 fps | 100% |
| ADI AR 2208 | <<locked>> | 86% | 36,303 psi | 58% | 2221 fps | 95.3% |
| ADI AR 2219 | <<locked>> | 80% | 46,427 psi | 74% | 2392 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 80% | 37,217 psi | 60% | 2231 fps | 97.7% |
| Alliant AR-Comp | <<locked>> | 80% | 35,781 psi | 57% | 2241 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 42,844 psi | 69% | 2402 fps | 98.5% |
| Alliant Power Pro 2000-MR | 49.5 gr | 86% | 38,812 psi | 62% | 2369 fps | 95.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 30,676 psi | 49% | 2142 fps | 95.3% |
| Alliant Reloder-10x | <<locked>> | 80% | 43,859 psi | 70% | 2310 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 35,621 psi | 57% | 2244 fps | 95.3% |
| Alliant Reloder-16 | <<locked>> | 98% | 39,784 psi | 64% | 2369 fps | 95.6% |
| Alliant Reloder-17 | <<locked>> | 90% | 34,693 psi | 56% | 2293 fps | 95.7% |
| Alliant Reloder-7 | <<locked>> | 80% | 52,199 psi | 84% | 2369 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 45,905 psi | 74% | 2293 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 38,957 psi | 62% | 2306 fps | 95.7% |
| Bofors RP3 | <<locked>> | 82% | 29,718 psi | 48% | 2136 fps | 95% |
| Hodgdon Benchmark | <<locked>> | 80% | 39,566 psi | 63% | 2238 fps | 98.7% |
| Hodgdon BL-C2 | <<locked>> | 80% | 34,867 psi | 56% | 2238 fps | 97.7% |
| Hodgdon CFE223 | 47.1 gr | 80% | 38,551 psi | 62% | 2352 fps | 96.2% |
| Hodgdon H322 | <<locked>> | 80% | 42,583 psi | 68% | 2333 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 43,105 psi | 69% | 2349 fps | 99.9% |
| Hodgdon H380 | <<locked>> | 90% | 40,756 psi | 65% | 2336 fps | 95.4% |
| Hodgdon H4198 | <<locked>> | 80% | 52,011 psi | 83% | 2375 fps | 100% |
| Hodgdon H4895 | <<locked>> | 80% | 35,375 psi | 57% | 2224 fps | 96.5% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 33,837 psi | 54% | 2224 fps | 95.5% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 31,459 psi | 50% | 2185 fps | 95.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,353 psi | 41% | 1319 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 34,316 psi | 55% | 2188 fps | 96% |
| IMR 3031 | <<locked>> | 80% | 34,214 psi | 55% | 2234 fps | 99.9% |
| IMR 4064 | <<locked>> | 84% | 35,621 psi | 57% | 2201 fps | 95.3% |
| IMR 4166 Enduron | <<locked>> | 92% | 49,966 psi | 80% | 2411 fps | 95% |
| IMR 4198 | <<locked>> | 80% | 45,049 psi | 72% | 2283 fps | 100% |
| IMR 4831 | <<locked>> | 98% | 37,086 psi | 59% | 2313 fps | 95% |
| IMR 4895 | <<locked>> | 82% | 34,084 psi | 55% | 2224 fps | 95.5% |
| IMR 8208 XBR | <<locked>> | 80% | 37,217 psi | 60% | 2231 fps | 97.7% |
| Lovex D073.4 | <<locked>> | 80% | 50,633 psi | 81% | 2444 fps | 100% |
| Lovex D073.5 | <<locked>> | 80% | 41,278 psi | 66% | 2306 fps | 99.2% |
| Lovex D073.6 | <<locked>> | 80% | 32,996 psi | 53% | 2195 fps | 98.2% |
| Lovex S060 | <<locked>> | 80% | 36,260 psi | 58% | 2172 fps | 96.1% |
| Lovex S062 | <<locked>> | 80% | 30,821 psi | 49% | 2116 fps | 95.8% |
| Lovex S065 | <<locked>> | 98% | 44,251 psi | 71% | 2369 fps | 95.3% |
| Norma 200 | <<locked>> | 80% | 49,284 psi | 79% | 2362 fps | 100% |
| Norma 201 | <<locked>> | 80% | 34,418 psi | 55% | 2178 fps | 97% |
| Norma 202 | <<locked>> | 80% | 34,403 psi | 55% | 2195 fps | 99% |
| Norma 203B | <<locked>> | 84% | 34,940 psi | 56% | 2234 fps | 95.8% |
| Norma URP | <<locked>> | 98% | 39,291 psi | 63% | 2359 fps | 95.4% |
| Ramshot Big Game | <<locked>> | 84% | 34,476 psi | 55% | 2241 fps | 95.2% |
| Ramshot TAC | <<locked>> | 84% | 42,322 psi | 68% | 2323 fps | 95% |
| Ramshot Wild Boar | <<locked>> | 80% | 36,071 psi | 58% | 2244 fps | 96% |
| Ramshot X-Terminator | <<locked>> | 80% | 40,364 psi | 65% | 2274 fps | 97% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,280 psi | 41% | 1348 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 42,018 psi | 67% | 2316 fps | 99.5% |
| ReloadSwiss RS 50 | <<locked>> | 94% | 47,442 psi | 76% | 2415 fps | 95.2% |
| ReloadSwiss RS 52 | 46.9 gr | 84% | 36,840 psi | 59% | 2329 fps | 95.7% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 28,601 psi | 46% | 2149 fps | 95.6% |
| Rottweil R 901 | <<locked>> | 80% | 37,956 psi | 61% | 2228 fps | 99.4% |
| Rottweil R 902 | <<locked>> | 80% | 32,750 psi | 53% | 2136 fps | 96.4% |
| Rottweil R 903 | <<locked>> | 86% | 31,981 psi | 51% | 2182 fps | 95.6% |
| Shooters World AR Plus | <<locked>> | 80% | 50,633 psi | 81% | 2444 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 98% | 44,251 psi | 71% | 2369 fps | 95.3% |
| Shooters World Match Rifle | <<locked>> | 80% | 32,996 psi | 53% | 2195 fps | 98.2% |
| Shooters World Precision | <<locked>> | 80% | 30,821 psi | 49% | 2116 fps | 95.8% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 44,237 psi | 71% | 2323 fps | 98.8% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 51,590 psi | 83% | 2129 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 46,934 psi | 75% | 2402 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 33,750 psi | 54% | 2231 fps | 95% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 44,701 psi | 72% | 2326 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 40,001 psi | 64% | 2293 fps | 95% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 33,750 psi | 54% | 2185 fps | 95.2% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 36,419 psi | 58% | 2159 fps | 99.3% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 29,631 psi | 48% | 2041 fps | 98.7% |
| Somchem S321 | <<locked>> | 80% | 39,624 psi | 64% | 2300 fps | 98.5% |
| Somchem S335 | <<locked>> | 80% | 35,708 psi | 57% | 2162 fps | 99.6% |
| Somchem S341 | <<locked>> | 80% | 34,592 psi | 55% | 2198 fps | 95.4% |
| Somchem S355 | <<locked>> | 86% | 33,156 psi | 53% | 2188 fps | 95.7% |
| Somchem S365 | <<locked>> | 94% | 30,589 psi | 49% | 2208 fps | 95.8% |
| Vihtavuori N120 | <<locked>> | 80% | 51,329 psi | 82% | 2310 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 41,481 psi | 67% | 2231 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 36,521 psi | 59% | 2165 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 31,517 psi | 51% | 2136 fps | 99.9% |
| Vihtavuori N140 | <<locked>> | 80% | 32,445 psi | 52% | 2139 fps | 98.9% |
| Vihtavuori N150 | <<locked>> | 82% | 27,659 psi | 44% | 2047 fps | 95% |
| Vihtavuori N160 | <<locked>> | 96% | 38,928 psi | 62% | 2316 fps | 95.1% |
| Vihtavuori N530 | <<locked>> | 80% | 37,043 psi | 59% | 2228 fps | 97.7% |
| Vihtavuori N540 | <<locked>> | 80% | 31,227 psi | 50% | 2126 fps | 98.1% |
| Vihtavuori N550 | <<locked>> | 98% | 40,306 psi | 65% | 2365 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 32,750 psi | 53% | 2159 fps | 95% |
| Winchester 748 | <<locked>> | 80% | 35,679 psi | 57% | 2257 fps | 98.2% |
| Winchester StaBALL Match | <<locked>> | 80% | 32,866 psi | 53% | 2188 fps | 95.7% |
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 100 powders for 8.5 x 63 loaded with the .338 | 225gr | Barnes TTSX BT. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,638 fps; across all powders the maximum-charge window runs from 1,480 fps to 2,638 fps. Accurate 4064 gives the best case fill at 100 %, and 100 of the 100 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 1:12.5 twist; slower twists will usually not stabilise this weight. Accurate 4064, Accurate 4350, ADI AR 2208 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, Hodgdon CFE223, ReloadSwiss RS 52 rank at the top here: for 8.5 x 63 with the .338 | 225gr | Barnes TTSX BT 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.