Load Specifications
Load data in caliber 8 x 64 S with .323 | 200gr | Barnes X S bullet and 87 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 60, Alliant Reloder-17 and Alliant Power Pro 2000-MR.
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>> | 84% | 52,707 psi | 90% | 2464 fps | 100% |
| Accurate 2495 | <<locked>> | 88% | 51,459 psi | 88% | 2490 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 52,243 psi | 89% | 2539 fps | 100% |
| Accurate 4064 | <<locked>> | 90% | 51,184 psi | 87% | 2530 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 52,431 psi | 89% | 2628 fps | 98.8% |
| ADI AR 2206H | <<locked>> | 86% | 51,227 psi | 87% | 2543 fps | 99.4% |
| ADI AR 2208 | <<locked>> | 92% | 51,764 psi | 88% | 2536 fps | 99.1% |
| ADI Benchmark 8208 | <<locked>> | 84% | 50,328 psi | 86% | 2500 fps | 99.8% |
| Alliant AR-Comp | <<locked>> | 84% | 50,459 psi | 86% | 2490 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 90% | 53,040 psi | 90% | 2684 fps | 99.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 51,721 psi | 88% | 2566 fps | 99.8% |
| Alliant Reloder-15 | <<locked>> | 90% | 52,315 psi | 89% | 2579 fps | 99.3% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 50,444 psi | 86% | 2621 fps | 98.8% |
| Alliant Reloder-17 | <<locked>> | 96% | 51,227 psi | 87% | 2657 fps | 99.8% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 36,825 psi | 63% | 2388 fps | 97% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 50,299 psi | 86% | 2549 fps | 98.6% |
| Bofors RP3 | <<locked>> | 92% | 52,069 psi | 89% | 2579 fps | 99.9% |
| Hodgdon Benchmark | <<locked>> | 84% | 52,243 psi | 89% | 2487 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 86% | 52,504 psi | 89% | 2575 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 82% | 50,299 psi | 86% | 2605 fps | 99.1% |
| Hodgdon H380 | <<locked>> | 90% | 50,082 psi | 85% | 2536 fps | 98% |
| Hodgdon H414 | <<locked>> | 98% | 51,692 psi | 88% | 2618 fps | 96.3% |
| Hodgdon H4895 | <<locked>> | 86% | 51,634 psi | 88% | 2552 fps | 99.7% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 46,978 psi | 80% | 2516 fps | 99.3% |
| Hodgdon LEVERevolution | <<locked>> | 88% | 49,922 psi | 85% | 2575 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,621 psi | 61% | 1552 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 52,388 psi | 89% | 2549 fps | 99.7% |
| IMR 3031 | <<locked>> | 86% | 51,097 psi | 87% | 2543 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 51,329 psi | 87% | 2523 fps | 99.2% |
| IMR 4166 Enduron | <<locked>> | 88% | 51,851 psi | 88% | 2500 fps | 96.1% |
| IMR 4451 Enduron | <<locked>> | 94% | 51,068 psi | 87% | 2520 fps | 95.9% |
| IMR 4831ᴾ | <<locked>> | 100% | 49,501 psi | 84% | 2569 fps | 98.5% |
| IMR 4895 | <<locked>> | 88% | 50,459 psi | 86% | 2562 fps | 99.4% |
| IMR 8208 XBR | <<locked>> | 84% | 50,328 psi | 86% | 2500 fps | 99.8% |
| Lovex D073.6 | <<locked>> | 86% | 50,618 psi | 86% | 2526 fps | 100% |
| Lovex S060 | <<locked>> | 86% | 51,097 psi | 87% | 2477 fps | 99.4% |
| Lovex S062 | <<locked>> | 90% | 51,430 psi | 88% | 2526 fps | 99.9% |
| Lovex S065 | <<locked>> | 96% | 50,473 psi | 86% | 2516 fps | 97.3% |
| Lovex S070 | <<locked>> | 98% | 51,068 psi | 87% | 2546 fps | 96.3% |
| Norma 201 | <<locked>> | 86% | 50,705 psi | 86% | 2503 fps | 99.9% |
| Norma 202 | <<locked>> | 86% | 50,502 psi | 86% | 2503 fps | 100% |
| Norma 203B | <<locked>> | 90% | 51,561 psi | 88% | 2569 fps | 99.5% |
| Norma URPᴾ | <<locked>> | 100% | 51,358 psi | 87% | 2612 fps | 98.6% |
| Ramshot Big Game | <<locked>> | 90% | 51,184 psi | 87% | 2585 fps | 99.4% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 50,415 psi | 86% | 2605 fps | 96.9% |
| Ramshot TAC | <<locked>> | 84% | 50,357 psi | 86% | 2507 fps | 97.5% |
| Ramshot Wild Boar | <<locked>> | 86% | 52,794 psi | 90% | 2575 fps | 99.5% |
| Ramshot X-Terminator | <<locked>> | 82% | 51,097 psi | 87% | 2497 fps | 99.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,969 psi | 61% | 1588 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 53,040 psi | 90% | 2530 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 50,357 psi | 86% | 2516 fps | 96.5% |
| ReloadSwiss RS 52 | <<locked>> | 88% | 51,895 psi | 88% | 2635 fps | 99.2% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 51,198 psi | 87% | 2664 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 51,329 psi | 87% | 2641 fps | 98.5% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 51,677 psi | 88% | 2657 fps | 98% |
| Rottweil R 901 | <<locked>> | 84% | 52,359 psi | 89% | 2493 fps | 100% |
| Rottweil R 902 | <<locked>> | 88% | 51,213 psi | 87% | 2500 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 94% | 51,967 psi | 88% | 2569 fps | 99.8% |
| Shooters World Long Rifle | <<locked>> | 96% | 50,473 psi | 86% | 2516 fps | 97.3% |
| Shooters World Match Rifle | <<locked>> | 86% | 50,618 psi | 86% | 2526 fps | 100% |
| Shooters World Precision | <<locked>> | 90% | 51,430 psi | 88% | 2526 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 98% | 51,068 psi | 87% | 2546 fps | 96.3% |
| SNPE Vectan SP 11 | <<locked>> | 94% | 53,026 psi | 90% | 2618 fps | 99.6% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 52,025 psi | 89% | 2536 fps | 98.2% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 52,620 psi | 90% | 2562 fps | 99.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 51,851 psi | 88% | 2448 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 51,329 psi | 87% | 2444 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 50,546 psi | 86% | 2470 fps | 95.8% |
| Somchem S321 | <<locked>> | 82% | 51,198 psi | 87% | 2530 fps | 99.9% |
| Somchem S335 | <<locked>> | 86% | 51,517 psi | 88% | 2451 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 51,358 psi | 87% | 2533 fps | 99.4% |
| Somchem S355 | <<locked>> | 94% | 52,547 psi | 89% | 2569 fps | 99.7% |
| Somchem S365ᴾ | <<locked>> | 100% | 46,166 psi | 79% | 2572 fps | 99.9% |
| Vihtavuori N130 | <<locked>> | 82% | 51,706 psi | 88% | 2415 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 51,764 psi | 88% | 2434 fps | 100% |
| Vihtavuori N135 | <<locked>> | 90% | 53,127 psi | 90% | 2513 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 50,836 psi | 87% | 2484 fps | 100% |
| Vihtavuori N150 | <<locked>> | 94% | 50,285 psi | 86% | 2503 fps | 100% |
| Vihtavuori N160 | <<locked>> | 98% | 50,618 psi | 86% | 2562 fps | 98.4% |
| Vihtavuori N530 | <<locked>> | 84% | 50,633 psi | 86% | 2500 fps | 99.9% |
| Vihtavuori N540 | <<locked>> | 90% | 52,286 psi | 89% | 2526 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 53,055 psi | 90% | 2618 fps | 98.7% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 39,450 psi | 67% | 2461 fps | 97% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 51,227 psi | 87% | 2546 fps | 99.7% |
| Winchester 748 | <<locked>> | 84% | 49,806 psi | 85% | 2539 fps | 100% |
| Winchester 760 | <<locked>> | 98% | 51,692 psi | 88% | 2618 fps | 96.3% |
| Winchester StaBALL Match | <<locked>> | 88% | 52,156 psi | 89% | 2569 fps | 99.8% |
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% | 46,963 psi | 80% | 2385 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 40,538 psi | 69% | 2329 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 46,079 psi | 78% | 2448 fps | 100% |
| Accurate 4064 | <<locked>> | 80% | 38,305 psi | 65% | 2320 fps | 99.9% |
| Accurate 4350 | <<locked>> | 88% | 35,737 psi | 61% | 2336 fps | 95% |
| ADI AR 2206H | <<locked>> | 80% | 42,946 psi | 73% | 2402 fps | 98.3% |
| ADI AR 2208 | <<locked>> | 80% | 36,651 psi | 62% | 2267 fps | 95.9% |
| ADI Benchmark 8208 | <<locked>> | 80% | 44,715 psi | 76% | 2411 fps | 99.4% |
| Alliant AR-Comp | <<locked>> | 80% | 44,599 psi | 76% | 2408 fps | 100% |
| Alliant Power Pro 2000-MR | 46.8 gr | 80% | 38,769 psi | 66% | 2418 fps | 96.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 36,347 psi | 62% | 2293 fps | 97.6% |
| Alliant Reloder-15 | <<locked>> | 80% | 38,885 psi | 66% | 2346 fps | 96.8% |
| Alliant Reloder-16 | <<locked>> | 90% | 38,029 psi | 65% | 2382 fps | 95.7% |
| Alliant Reloder-17 | 47.2 gr | 82% | 33,417 psi | 57% | 2306 fps | 95.9% |
| Alliant Reloder-23 | <<locked>> | 96% | 32,953 psi | 56% | 2297 fps | 95.4% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 41,510 psi | 71% | 2398 fps | 96.9% |
| Bofors RP3 | <<locked>> | 80% | 36,129 psi | 62% | 2300 fps | 97.7% |
| Hodgdon Benchmark | <<locked>> | 80% | 46,499 psi | 79% | 2402 fps | 99.8% |
| Hodgdon BL-C2 | <<locked>> | 80% | 43,439 psi | 74% | 2434 fps | 99.6% |
| Hodgdon CFE223 | <<locked>> | 80% | 47,065 psi | 80% | 2552 fps | 98.6% |
| Hodgdon H380 | <<locked>> | 82% | 39,160 psi | 67% | 2343 fps | 95.5% |
| Hodgdon H414 | <<locked>> | 96% | 48,356 psi | 82% | 2562 fps | 95.5% |
| Hodgdon H4895 | <<locked>> | 80% | 43,250 psi | 74% | 2415 fps | 98.8% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 31,270 psi | 53% | 2201 fps | 95.1% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 39,030 psi | 66% | 2388 fps | 98.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,672 psi | 45% | 1385 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 41,437 psi | 71% | 2369 fps | 98.4% |
| IMR 3031 | <<locked>> | 80% | 42,511 psi | 72% | 2415 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 38,421 psi | 65% | 2297 fps | 96.8% |
| IMR 4166 Enduron | <<locked>> | 86% | 48,631 psi | 83% | 2448 fps | 95.4% |
| IMR 4451 Enduron | <<locked>> | 92% | 48,211 psi | 82% | 2474 fps | 95.2% |
| IMR 4831 | <<locked>> | 90% | 36,695 psi | 62% | 2339 fps | 95.4% |
| IMR 4895 | <<locked>> | 80% | 39,711 psi | 68% | 2372 fps | 97.7% |
| IMR 8208 XBR | <<locked>> | 80% | 44,715 psi | 76% | 2411 fps | 99.4% |
| Lovex D073.6 | <<locked>> | 80% | 41,959 psi | 71% | 2392 fps | 99.8% |
| Lovex S060 | <<locked>> | 80% | 43,062 psi | 73% | 2346 fps | 98.3% |
| Lovex S062 | <<locked>> | 80% | 38,667 psi | 66% | 2310 fps | 98.5% |
| Lovex S065 | <<locked>> | 90% | 42,583 psi | 72% | 2385 fps | 95.4% |
| Lovex S070 | <<locked>> | 96% | 48,124 psi | 82% | 2500 fps | 95.6% |
| Norma 201 | <<locked>> | 80% | 42,511 psi | 72% | 2365 fps | 99.1% |
| Norma 202 | <<locked>> | 80% | 42,409 psi | 72% | 2375 fps | 100% |
| Norma 203B | <<locked>> | 80% | 38,290 psi | 65% | 2336 fps | 97.3% |
| Norma URP | <<locked>> | 90% | 37,942 psi | 65% | 2375 fps | 95.6% |
| Ramshot Big Game | <<locked>> | 80% | 37,521 psi | 64% | 2346 fps | 96.8% |
| Ramshot Hunter | <<locked>> | 96% | 44,614 psi | 76% | 2503 fps | 95.4% |
| Ramshot TAC | <<locked>> | 80% | 44,469 psi | 76% | 2408 fps | 96.2% |
| Ramshot Wild Boar | <<locked>> | 80% | 43,830 psi | 75% | 2431 fps | 98.4% |
| Ramshot X-Terminator | <<locked>> | 80% | 48,211 psi | 82% | 2454 fps | 98.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,079 psi | 46% | 1421 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 49,980 psi | 85% | 2484 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 44,556 psi | 76% | 2421 fps | 95.1% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 39,943 psi | 68% | 2431 fps | 97.1% |
| ReloadSwiss RS 60 | 46 gr | 80% | 33,214 psi | 57% | 2310 fps | 98.3% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 37,434 psi | 64% | 2392 fps | 95.1% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 42,815 psi | 73% | 2497 fps | 95.8% |
| Rottweil R 901 | <<locked>> | 80% | 46,804 psi | 80% | 2411 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 40,625 psi | 69% | 2326 fps | 98.8% |
| Rottweil R 903 | <<locked>> | 80% | 34,142 psi | 58% | 2251 fps | 96.8% |
| Shooters World Long Rifle | <<locked>> | 90% | 42,583 psi | 72% | 2385 fps | 95.4% |
| Shooters World Match Rifle | <<locked>> | 80% | 41,959 psi | 71% | 2392 fps | 99.8% |
| Shooters World Precision | <<locked>> | 80% | 38,667 psi | 66% | 2310 fps | 98.5% |
| Shooters World SW4350 | <<locked>> | 96% | 48,124 psi | 82% | 2500 fps | 95.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 34,490 psi | 59% | 2283 fps | 95.8% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 43,076 psi | 73% | 2388 fps | 96.4% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 41,191 psi | 70% | 2372 fps | 97.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 43,598 psi | 74% | 2323 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 36,303 psi | 62% | 2205 fps | 99.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 47,471 psi | 81% | 2428 fps | 95.2% |
| Somchem S321 | <<locked>> | 80% | 48,008 psi | 82% | 2480 fps | 99.8% |
| Somchem S335 | <<locked>> | 80% | 43,294 psi | 74% | 2329 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 42,308 psi | 72% | 2385 fps | 98% |
| Somchem S355 | <<locked>> | 80% | 34,853 psi | 59% | 2254 fps | 96.7% |
| Somchem S365 | <<locked>> | 84% | 28,877 psi | 49% | 2195 fps | 95.6% |
| Vihtavuori N130 | <<locked>> | 80% | 48,994 psi | 83% | 2379 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 43,613 psi | 74% | 2320 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 39,624 psi | 67% | 2313 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 40,030 psi | 68% | 2313 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 33,083 psi | 56% | 2198 fps | 97.6% |
| Vihtavuori N160 | <<locked>> | 88% | 37,463 psi | 64% | 2329 fps | 95.3% |
| Vihtavuori N530 | <<locked>> | 80% | 44,846 psi | 76% | 2408 fps | 99.4% |
| Vihtavuori N540 | <<locked>> | 80% | 38,551 psi | 66% | 2306 fps | 99.7% |
| Vihtavuori N550 | <<locked>> | 90% | 39,175 psi | 67% | 2385 fps | 95.7% |
| Vihtavuori N555 | <<locked>> | 96% | 35,012 psi | 60% | 2365 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 31,372 psi | 53% | 2169 fps | 95.1% |
| Winchester 748 | <<locked>> | 80% | 43,830 psi | 75% | 2444 fps | 99.7% |
| Winchester 760 | <<locked>> | 96% | 48,689 psi | 83% | 2569 fps | 95.6% |
| Winchester StaBALL Match | <<locked>> | 80% | 40,582 psi | 69% | 2379 fps | 98.3% |
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 87 powders for 8 x 64 S loaded with the .323 | 200gr | Barnes X S. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,684 fps; across all powders the maximum-charge window runs from 1,552 fps to 2,684 fps. Accurate 4350 gives the best case fill at 100 %, and 87 of the 87 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (405 MPa), the top charges use 61–90 %, leaving at least 10 % headroom. The 200.0 gr projectile in 0.323" calls for a 1:13.0 twist; slower twists will usually not stabilise this weight. Accurate 4350, Alliant Reloder-16, Alliant Reloder-23 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. ReloadSwiss RS 60, Alliant Reloder-17, Alliant Power Pro 2000-MR rank at the top here: for 8 x 64 S with the .323 | 200gr | Barnes X S 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.