Load Specifications
Load data in caliber 8 x 64 S with .323 | 180gr | Barnes X S bullet and 83 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 Alliant Reloder-17.
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.
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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% | 50,343 psi | 86% | 2582 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 51,880 psi | 88% | 2644 fps | 100% |
| Accurate 2495 | <<locked>> | 90% | 51,982 psi | 88% | 2651 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 53,011 psi | 90% | 2700 fps | 100% |
| Accurate 4064 | <<locked>> | 92% | 51,503 psi | 88% | 2687 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 49,269 psi | 84% | 2726 fps | 97.6% |
| ADI AR 2206H | <<locked>> | 88% | 51,750 psi | 88% | 2697 fps | 98.9% |
| ADI AR 2208 | <<locked>> | 94% | 52,431 psi | 89% | 2690 fps | 98.5% |
| ADI Benchmark 8208 | <<locked>> | 86% | 51,039 psi | 87% | 2657 fps | 99.5% |
| Alliant AR-Comp | <<locked>> | 86% | 50,778 psi | 86% | 2651 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 52,417 psi | 89% | 2756 fps | 99.4% |
| Alliant Power Pro 2000-MR | <<locked>> | 90% | 50,430 psi | 86% | 2785 fps | 98.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 52,083 psi | 89% | 2717 fps | 99.5% |
| Alliant Reloder-10x | <<locked>> | 82% | 53,011 psi | 90% | 2631 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 92% | 52,779 psi | 90% | 2733 fps | 98.7% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 48,254 psi | 82% | 2720 fps | 97.5% |
| Alliant Reloder-17 | <<locked>> | 98% | 52,040 psi | 89% | 2818 fps | 99.4% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 51,097 psi | 87% | 2707 fps | 98% |
| Bofors RP3 | <<locked>> | 94% | 52,518 psi | 89% | 2733 fps | 99.6% |
| Hodgdon Benchmark | <<locked>> | 84% | 50,067 psi | 85% | 2598 fps | 99.7% |
| Hodgdon BL-C2 | <<locked>> | 88% | 53,127 psi | 90% | 2736 fps | 99.9% |
| Hodgdon CFE223 | <<locked>> | 84% | 50,952 psi | 87% | 2762 fps | 98.5% |
| Hodgdon H322 | <<locked>> | 82% | 51,488 psi | 88% | 2661 fps | 100% |
| Hodgdon H335 | <<locked>> | 82% | 52,315 psi | 89% | 2684 fps | 100% |
| Hodgdon H380 | <<locked>> | 92% | 50,676 psi | 86% | 2687 fps | 97.2% |
| Hodgdon H4895 | <<locked>> | 88% | 52,141 psi | 89% | 2710 fps | 99.3% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 44,527 psi | 76% | 2612 fps | 98.1% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 50,604 psi | 86% | 2736 fps | 99.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,389 psi | 60% | 1650 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 50,183 psi | 85% | 2661 fps | 99.1% |
| IMR 3031 | <<locked>> | 88% | 51,590 psi | 88% | 2707 fps | 100% |
| IMR 4064 | <<locked>> | 92% | 52,098 psi | 89% | 2677 fps | 98.6% |
| IMR 4198 | <<locked>> | 82% | 52,649 psi | 90% | 2589 fps | 100% |
| IMR 4831ᴾ | <<locked>> | 100% | 46,731 psi | 80% | 2667 fps | 97.1% |
| IMR 4895 | <<locked>> | 90% | 50,966 psi | 87% | 2717 fps | 98.9% |
| IMR 8208 XBR | <<locked>> | 86% | 51,039 psi | 87% | 2657 fps | 99.5% |
| Lovex D073.5 | <<locked>> | 82% | 51,445 psi | 88% | 2651 fps | 99.9% |
| Lovex D073.6 | <<locked>> | 88% | 51,256 psi | 87% | 2687 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 51,924 psi | 88% | 2635 fps | 99% |
| Lovex S062 | <<locked>> | 92% | 52,098 psi | 89% | 2684 fps | 99.7% |
| Lovex S065 | <<locked>> | 98% | 51,010 psi | 87% | 2664 fps | 96.4% |
| Norma 201 | <<locked>> | 88% | 51,401 psi | 88% | 2657 fps | 99.6% |
| Norma 202 | <<locked>> | 88% | 51,097 psi | 87% | 2661 fps | 100% |
| Norma 203B | <<locked>> | 92% | 51,924 psi | 88% | 2723 fps | 99% |
| Norma URPᴾ | <<locked>> | 100% | 48,689 psi | 83% | 2713 fps | 97.3% |
| Ramshot Big Game | <<locked>> | 92% | 51,692 psi | 88% | 2740 fps | 98.8% |
| Ramshot TAC | <<locked>> | 86% | 51,227 psi | 87% | 2661 fps | 96.7% |
| Ramshot Wild Boar | <<locked>> | 86% | 50,575 psi | 86% | 2687 fps | 98.8% |
| Ramshot X-Terminator | <<locked>> | 84% | 52,112 psi | 89% | 2657 fps | 98.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,665 psi | 61% | 1686 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 50,560 psi | 86% | 2644 fps | 99.9% |
| ReloadSwiss RS 52 | <<locked>> | 90% | 52,359 psi | 89% | 2792 fps | 98.7% |
| ReloadSwiss RS 60 | <<locked>> | 96% | 51,953 psi | 88% | 2825 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 48,457 psi | 82% | 2736 fps | 97.1% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 49,371 psi | 84% | 2749 fps | 96.3% |
| Rottweil R 901 | <<locked>> | 86% | 53,055 psi | 90% | 2654 fps | 100% |
| Rottweil R 902 | <<locked>> | 90% | 51,488 psi | 88% | 2651 fps | 99.6% |
| Rottweil R 903 | <<locked>> | 96% | 52,344 psi | 89% | 2723 fps | 99.4% |
| Shooters World Long Rifle | <<locked>> | 98% | 51,010 psi | 87% | 2664 fps | 96.4% |
| Shooters World Match Rifle | <<locked>> | 88% | 51,256 psi | 87% | 2687 fps | 100% |
| Shooters World Precision | <<locked>> | 92% | 52,098 psi | 89% | 2684 fps | 99.7% |
| SNPE Vectan SP 11 | <<locked>> | 94% | 50,198 psi | 85% | 2723 fps | 98.7% |
| SNPE Vectan SP 7 | <<locked>> | 88% | 52,982 psi | 90% | 2694 fps | 97.5% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 50,183 psi | 85% | 2671 fps | 98.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 52,663 psi | 90% | 2605 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 52,228 psi | 89% | 2602 fps | 100% |
| Somchem S321 | <<locked>> | 84% | 52,054 psi | 89% | 2690 fps | 99.7% |
| Somchem S335 | <<locked>> | 88% | 52,228 psi | 89% | 2608 fps | 100% |
| Somchem S341 | <<locked>> | 88% | 52,228 psi | 89% | 2687 fps | 98.9% |
| Somchem S355 | <<locked>> | 96% | 52,852 psi | 90% | 2720 fps | 99.4% |
| Somchem S365ᴾ | <<locked>> | 100% | 43,714 psi | 74% | 2667 fps | 99.2% |
| Vihtavuori N130 | <<locked>> | 84% | 52,736 psi | 90% | 2582 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 52,446 psi | 89% | 2595 fps | 100% |
| Vihtavuori N135 | <<locked>> | 90% | 50,473 psi | 86% | 2631 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 51,285 psi | 87% | 2641 fps | 100% |
| Vihtavuori N150 | <<locked>> | 96% | 50,807 psi | 86% | 2654 fps | 99.8% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 51,024 psi | 87% | 2710 fps | 97.6% |
| Vihtavuori N530 | <<locked>> | 86% | 51,343 psi | 87% | 2654 fps | 99.6% |
| Vihtavuori N540 | <<locked>> | 92% | 52,939 psi | 90% | 2684 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 50,096 psi | 85% | 2717 fps | 97.3% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 51,996 psi | 89% | 2697 fps | 99.3% |
| Winchester 748 | <<locked>> | 86% | 50,546 psi | 86% | 2700 fps | 99.9% |
| Winchester StaBALL Match | <<locked>> | 90% | 52,895 psi | 90% | 2730 fps | 99.4% |
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% | 44,759 psi | 76% | 2497 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 48,704 psi | 83% | 2598 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 38,450 psi | 65% | 2431 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 43,714 psi | 74% | 2552 fps | 99.6% |
| Accurate 4064 | <<locked>> | 80% | 36,318 psi | 62% | 2418 fps | 99.3% |
| Accurate 4350 | <<locked>> | 94% | 40,553 psi | 69% | 2569 fps | 95.4% |
| ADI AR 2206H | <<locked>> | 80% | 41,002 psi | 70% | 2503 fps | 96.9% |
| ADI AR 2208 | <<locked>> | 84% | 39,392 psi | 67% | 2454 fps | 95.7% |
| ADI Benchmark 8208 | <<locked>> | 80% | 42,786 psi | 73% | 2513 fps | 98.5% |
| Alliant AR-Comp | <<locked>> | 80% | 42,090 psi | 72% | 2520 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 49,371 psi | 84% | 2703 fps | 99.1% |
| Alliant Power Pro 2000-MR | 49.7 gr | 82% | 39,334 psi | 67% | 2559 fps | 95% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 34,505 psi | 59% | 2385 fps | 96% |
| Alliant Reloder-10x | <<locked>> | 80% | 49,966 psi | 85% | 2585 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 36,999 psi | 63% | 2438 fps | 95.1% |
| Alliant Reloder-16 | <<locked>> | 94% | 40,712 psi | 69% | 2569 fps | 95.3% |
| Alliant Reloder-17 | 51.3 gr | 86% | 35,882 psi | 61% | 2490 fps | 95.5% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 39,639 psi | 67% | 2493 fps | 95.2% |
| Bofors RP3 | <<locked>> | 80% | 34,185 psi | 58% | 2388 fps | 96% |
| Hodgdon Benchmark | <<locked>> | 80% | 44,672 psi | 76% | 2507 fps | 99.2% |
| Hodgdon BL-C2 | <<locked>> | 80% | 41,336 psi | 70% | 2536 fps | 98.7% |
| Hodgdon CFE223 | <<locked>> | 80% | 44,599 psi | 76% | 2651 fps | 97.3% |
| Hodgdon H322 | <<locked>> | 80% | 48,269 psi | 82% | 2612 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 49,095 psi | 84% | 2635 fps | 100% |
| Hodgdon H380 | <<locked>> | 86% | 42,105 psi | 72% | 2533 fps | 95.2% |
| Hodgdon H4895 | <<locked>> | 80% | 41,249 psi | 70% | 2513 fps | 97.6% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 35,317 psi | 60% | 2421 fps | 95.4% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 37,014 psi | 63% | 2477 fps | 96.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,353 psi | 45% | 1470 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 39,392 psi | 67% | 2464 fps | 97% |
| IMR 3031 | <<locked>> | 80% | 40,364 psi | 69% | 2523 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 36,782 psi | 63% | 2392 fps | 95.1% |
| IMR 4198 | <<locked>> | 80% | 49,835 psi | 85% | 2546 fps | 100% |
| IMR 4831 | <<locked>> | 94% | 38,986 psi | 66% | 2520 fps | 95% |
| IMR 4895 | <<locked>> | 80% | 37,768 psi | 64% | 2467 fps | 96.1% |
| IMR 8208 XBR | <<locked>> | 80% | 42,786 psi | 73% | 2513 fps | 98.5% |
| Lovex D073.5 | <<locked>> | 80% | 48,399 psi | 82% | 2602 fps | 99.7% |
| Lovex D073.6 | <<locked>> | 80% | 39,871 psi | 68% | 2493 fps | 99.2% |
| Lovex S060 | <<locked>> | 80% | 41,466 psi | 71% | 2448 fps | 97.1% |
| Lovex S062 | <<locked>> | 80% | 36,912 psi | 63% | 2405 fps | 97.2% |
| Lovex S065 | <<locked>> | 94% | 45,542 psi | 78% | 2572 fps | 95.1% |
| Norma 201 | <<locked>> | 80% | 40,654 psi | 69% | 2467 fps | 98.1% |
| Norma 202 | <<locked>> | 80% | 40,480 psi | 69% | 2480 fps | 99.6% |
| Norma 203B | <<locked>> | 80% | 36,405 psi | 62% | 2428 fps | 95.6% |
| Norma URP | <<locked>> | 94% | 40,625 psi | 69% | 2562 fps | 95.2% |
| Ramshot Big Game | <<locked>> | 82% | 37,942 psi | 65% | 2484 fps | 95.8% |
| Ramshot TAC | <<locked>> | 82% | 45,397 psi | 77% | 2559 fps | 95.3% |
| Ramshot Wild Boar | <<locked>> | 80% | 41,756 psi | 71% | 2530 fps | 97.1% |
| Ramshot X-Terminator | <<locked>> | 80% | 46,238 psi | 79% | 2559 fps | 97.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,701 psi | 45% | 1506 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 47,747 psi | 81% | 2595 fps | 99.8% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 37,971 psi | 65% | 2523 fps | 95.4% |
| ReloadSwiss RS 60 | 47.7 gr | 80% | 31,734 psi | 54% | 2392 fps | 96.4% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 42,743 psi | 73% | 2631 fps | 95.5% |
| ReloadSwiss RS 70 | <<locked>> | 98% | 46,412 psi | 79% | 2694 fps | 95.5% |
| Rottweil R 901 | <<locked>> | 80% | 44,802 psi | 76% | 2520 fps | 99.8% |
| Rottweil R 902 | <<locked>> | 80% | 38,943 psi | 66% | 2425 fps | 97.7% |
| Rottweil R 903 | <<locked>> | 82% | 34,272 psi | 58% | 2382 fps | 95.7% |
| Shooters World Long Rifle | <<locked>> | 94% | 45,542 psi | 78% | 2572 fps | 95.1% |
| Shooters World Match Rifle | <<locked>> | 80% | 39,871 psi | 68% | 2493 fps | 99.2% |
| Shooters World Precision | <<locked>> | 80% | 36,912 psi | 63% | 2405 fps | 97.2% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 37,014 psi | 63% | 2467 fps | 95.5% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 43,642 psi | 74% | 2533 fps | 95.4% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 39,392 psi | 67% | 2470 fps | 96.4% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 41,727 psi | 71% | 2428 fps | 99.7% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 34,606 psi | 59% | 2303 fps | 99.3% |
| Somchem S321 | <<locked>> | 80% | 46,021 psi | 78% | 2592 fps | 99.2% |
| Somchem S335 | <<locked>> | 80% | 41,495 psi | 71% | 2434 fps | 99.9% |
| Somchem S341 | <<locked>> | 80% | 40,451 psi | 69% | 2484 fps | 96.6% |
| Somchem S355 | <<locked>> | 80% | 33,228 psi | 57% | 2343 fps | 95% |
| Somchem S365 | <<locked>> | 88% | 30,821 psi | 52% | 2365 fps | 95.1% |
| Vihtavuori N130 | <<locked>> | 80% | 46,949 psi | 80% | 2497 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 41,742 psi | 71% | 2428 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 37,521 psi | 64% | 2418 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 38,159 psi | 65% | 2418 fps | 99.5% |
| Vihtavuori N150 | <<locked>> | 80% | 31,444 psi | 54% | 2283 fps | 96% |
| Vihtavuori N160 | <<locked>> | 94% | 42,598 psi | 73% | 2562 fps | 95.7% |
| Vihtavuori N530 | <<locked>> | 80% | 42,786 psi | 73% | 2510 fps | 98.5% |
| Vihtavuori N540 | <<locked>> | 80% | 36,869 psi | 63% | 2405 fps | 99% |
| Vihtavuori N550 | <<locked>> | 94% | 41,727 psi | 71% | 2566 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 36,013 psi | 61% | 2398 fps | 95.7% |
| Winchester 748 | <<locked>> | 80% | 41,669 psi | 71% | 2549 fps | 99% |
| Winchester StaBALL Match | <<locked>> | 80% | 38,609 psi | 66% | 2474 fps | 96.9% |
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 83 powders for 8 x 64 S loaded with the .323 | 180gr | Barnes X S. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,825 fps; across all powders the maximum-charge window runs from 1,650 fps to 2,825 fps. Accurate 4350 gives the best case fill at 100 %, and 83 of the 83 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (405 MPa), the top charges use 60–90 %, leaving at least 10 % headroom. The 180.0 gr projectile in 0.323" calls for a 1:14.0 twist; slower twists will usually not stabilise this weight. Accurate 4350, Alliant Reloder-16, Hodgdon Hybrid 100V 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, Alliant Reloder-17 rank at the top here: for 8 x 64 S with the .323 | 180gr | 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.