Load Specifications
Load data in caliber 8 x 64 S with .323 | 180gr | Hornady ECX bullet and 89 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.
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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>> | 88% | 52,112 psi | 89% | 2644 fps | 100% |
| Accurate 2460 | <<locked>> | 84% | 50,285 psi | 86% | 2661 fps | 100% |
| Accurate 2495 | <<locked>> | 94% | 52,199 psi | 89% | 2697 fps | 100% |
| Accurate 2520 | <<locked>> | 88% | 51,924 psi | 88% | 2720 fps | 100% |
| Accurate 4064 | <<locked>> | 96% | 51,924 psi | 88% | 2733 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 44,295 psi | 75% | 2674 fps | 96.7% |
| Accurate LT-30 | <<locked>> | 82% | 52,388 psi | 89% | 2595 fps | 100% |
| Accurate LT-32 | <<locked>> | 82% | 52,779 psi | 90% | 2618 fps | 100% |
| ADI AR 2206H | <<locked>> | 90% | 51,329 psi | 87% | 2723 fps | 99% |
| ADI AR 2208 | <<locked>> | 96% | 52,301 psi | 89% | 2717 fps | 98.6% |
| ADI AR 2219 | <<locked>> | 82% | 52,605 psi | 90% | 2707 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 88% | 50,662 psi | 86% | 2680 fps | 99.6% |
| Alliant AR-Comp | <<locked>> | 88% | 49,966 psi | 85% | 2671 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 84% | 51,924 psi | 88% | 2779 fps | 99.5% |
| Alliant Power Pro 2000-MR | <<locked>> | 92% | 50,560 psi | 86% | 2818 fps | 98.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 96% | 51,198 psi | 87% | 2733 fps | 99.5% |
| Alliant Reloder-10x | <<locked>> | 84% | 52,228 psi | 89% | 2654 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 94% | 52,257 psi | 89% | 2756 fps | 98.8% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 44,715 psi | 76% | 2684 fps | 96.8% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 51,895 psi | 88% | 2841 fps | 99.5% |
| Baschieri & Pellagri 106 | <<locked>> | 82% | 51,198 psi | 87% | 2589 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 90% | 50,821 psi | 87% | 2730 fps | 98.1% |
| Bofors RP3 | <<locked>> | 96% | 51,227 psi | 87% | 2746 fps | 99.6% |
| Hodgdon Benchmark | <<locked>> | 88% | 52,837 psi | 90% | 2671 fps | 99.9% |
| Hodgdon BL-C2 | <<locked>> | 90% | 52,417 psi | 89% | 2756 fps | 99.9% |
| Hodgdon CFE223 | <<locked>> | 86% | 50,647 psi | 86% | 2789 fps | 98.6% |
| Hodgdon H322 | <<locked>> | 84% | 51,097 psi | 87% | 2687 fps | 100% |
| Hodgdon H335 | <<locked>> | 84% | 52,156 psi | 89% | 2710 fps | 100% |
| Hodgdon H380 | <<locked>> | 96% | 52,982 psi | 90% | 2756 fps | 97.8% |
| Hodgdon H4895 | <<locked>> | 90% | 51,808 psi | 88% | 2736 fps | 99.4% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 40,712 psi | 69% | 2572 fps | 97.4% |
| Hodgdon LEVERevolution | <<locked>> | 92% | 50,198 psi | 85% | 2759 fps | 99.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,519 psi | 59% | 1654 fps | 100% |
| Hodgdon VARGET | <<locked>> | 92% | 53,084 psi | 90% | 2736 fps | 99.5% |
| IMR 3031 | <<locked>> | 90% | 50,749 psi | 86% | 2726 fps | 100% |
| IMR 4064 | <<locked>> | 94% | 51,793 psi | 88% | 2703 fps | 98.7% |
| IMR 4198 | <<locked>> | 84% | 52,895 psi | 90% | 2618 fps | 100% |
| IMR 4831ᴾ | <<locked>> | 100% | 42,699 psi | 73% | 2625 fps | 96.3% |
| IMR 4895 | <<locked>> | 92% | 50,096 psi | 85% | 2733 fps | 98.9% |
| IMR 8208 XBR | <<locked>> | 88% | 50,662 psi | 86% | 2680 fps | 99.6% |
| Lovex D073.5 | <<locked>> | 84% | 50,140 psi | 85% | 2667 fps | 99.9% |
| Lovex D073.6 | <<locked>> | 90% | 49,763 psi | 85% | 2697 fps | 100% |
| Lovex S060 | <<locked>> | 90% | 51,590 psi | 88% | 2657 fps | 99% |
| Lovex S062 | <<locked>> | 94% | 50,952 psi | 87% | 2700 fps | 99.7% |
| Lovex S065ᴾ | <<locked>> | 100% | 50,067 psi | 85% | 2680 fps | 96.4% |
| Norma 201 | <<locked>> | 90% | 49,792 psi | 85% | 2671 fps | 99.5% |
| Norma 202 | <<locked>> | 90% | 50,270 psi | 86% | 2680 fps | 100% |
| Norma 203B | <<locked>> | 94% | 51,343 psi | 87% | 2746 fps | 99% |
| Norma URPᴾ | <<locked>> | 100% | 44,715 psi | 76% | 2674 fps | 96.6% |
| Ramshot Big Game | <<locked>> | 94% | 51,590 psi | 88% | 2766 fps | 98.9% |
| Ramshot TAC | <<locked>> | 88% | 51,155 psi | 87% | 2690 fps | 96.8% |
| Ramshot Wild Boar | <<locked>> | 88% | 50,183 psi | 85% | 2710 fps | 98.8% |
| Ramshot X-Terminator | <<locked>> | 86% | 51,866 psi | 88% | 2684 fps | 98.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,563 psi | 59% | 1690 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 50,241 psi | 86% | 2667 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 92% | 51,677 psi | 88% | 2812 fps | 98.7% |
| ReloadSwiss RS 60 | <<locked>> | 98% | 51,561 psi | 88% | 2848 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 44,440 psi | 76% | 2694 fps | 96.3% |
| Rottweil R 901 | <<locked>> | 88% | 50,966 psi | 87% | 2664 fps | 100% |
| Rottweil R 902 | <<locked>> | 92% | 50,212 psi | 85% | 2667 fps | 99.6% |
| Rottweil R 903 | <<locked>> | 98% | 51,111 psi | 87% | 2736 fps | 99.4% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 50,067 psi | 85% | 2680 fps | 96.4% |
| Shooters World Match Rifle | <<locked>> | 90% | 49,763 psi | 85% | 2697 fps | 100% |
| Shooters World Precision | <<locked>> | 94% | 50,952 psi | 87% | 2700 fps | 99.7% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 49,980 psi | 85% | 2635 fps | 99.3% |
| SNPE Vectan SP 10 | <<locked>> | 82% | 52,924 psi | 90% | 2717 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 98% | 53,113 psi | 90% | 2795 fps | 99.2% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 50,038 psi | 85% | 2628 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 90% | 52,228 psi | 89% | 2713 fps | 97.6% |
| SNPE Vectan SP 9 | <<locked>> | 92% | 52,895 psi | 90% | 2743 fps | 99.2% |
| SNPE Vectan Tubal 3000 | <<locked>> | 90% | 52,156 psi | 89% | 2628 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 96% | 51,764 psi | 88% | 2625 fps | 100% |
| Somchem S321 | <<locked>> | 86% | 51,474 psi | 88% | 2713 fps | 99.8% |
| Somchem S335 | <<locked>> | 90% | 51,097 psi | 87% | 2625 fps | 100% |
| Somchem S341 | <<locked>> | 90% | 51,895 psi | 88% | 2713 fps | 99% |
| Somchem S355 | <<locked>> | 98% | 51,706 psi | 88% | 2733 fps | 99.3% |
| Somchem S365ᴾ | <<locked>> | 100% | 39,624 psi | 67% | 2618 fps | 98.6% |
| Vihtavuori N130 | <<locked>> | 86% | 52,011 psi | 89% | 2602 fps | 100% |
| Vihtavuori N133 | <<locked>> | 90% | 52,127 psi | 89% | 2618 fps | 100% |
| Vihtavuori N135 | <<locked>> | 94% | 52,489 psi | 89% | 2690 fps | 100% |
| Vihtavuori N140 | <<locked>> | 92% | 50,676 psi | 86% | 2661 fps | 100% |
| Vihtavuori N150 | <<locked>> | 98% | 50,198 psi | 85% | 2677 fps | 99.8% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 47,195 psi | 80% | 2677 fps | 97% |
| Vihtavuori N530 | <<locked>> | 88% | 51,184 psi | 87% | 2684 fps | 99.7% |
| Vihtavuori N540 | <<locked>> | 94% | 52,170 psi | 89% | 2700 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 46,253 psi | 79% | 2680 fps | 96.7% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 48,544 psi | 83% | 2671 fps | 99% |
| Winchester 748 | <<locked>> | 88% | 50,212 psi | 85% | 2726 fps | 99.9% |
| Winchester StaBALL Match | <<locked>> | 92% | 52,562 psi | 89% | 2749 fps | 99.5% |
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% | 40,480 psi | 69% | 2464 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 43,888 psi | 75% | 2559 fps | 99.8% |
| Accurate 2495 | <<locked>> | 80% | 32,503 psi | 55% | 2362 fps | 99.9% |
| Accurate 2520 | <<locked>> | 80% | 39,146 psi | 67% | 2507 fps | 99.2% |
| Accurate 4064 | <<locked>> | 80% | 30,792 psi | 52% | 2339 fps | 98.2% |
| Accurate 4350 | <<locked>> | 98% | 41,321 psi | 70% | 2618 fps | 95.9% |
| Accurate LT-30 | <<locked>> | 80% | 49,284 psi | 84% | 2552 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 49,676 psi | 85% | 2572 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 37,217 psi | 63% | 2461 fps | 96% |
| ADI AR 2208 | <<locked>> | 86% | 38,319 psi | 65% | 2467 fps | 95.5% |
| ADI AR 2219 | <<locked>> | 80% | 49,081 psi | 84% | 2654 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 80% | 39,247 psi | 67% | 2480 fps | 97.8% |
| Alliant AR-Comp | <<locked>> | 80% | 38,159 psi | 65% | 2487 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 45,411 psi | 77% | 2667 fps | 98.6% |
| Alliant Power Pro 2000-MR | 52.9 gr | 86% | 41,118 psi | 70% | 2635 fps | 95.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 32,677 psi | 56% | 2379 fps | 95.5% |
| Alliant Reloder-10x | <<locked>> | 80% | 46,079 psi | 78% | 2562 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 37,739 psi | 64% | 2490 fps | 95.6% |
| Alliant Reloder-16 | <<locked>> | 96% | 39,610 psi | 67% | 2579 fps | 95.1% |
| Alliant Reloder-17 | <<locked>> | 88% | 34,548 psi | 59% | 2490 fps | 95.2% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 48,095 psi | 82% | 2546 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 38,566 psi | 66% | 2507 fps | 95.1% |
| Bofors RP3 | <<locked>> | 82% | 31,836 psi | 54% | 2375 fps | 95.3% |
| Hodgdon Benchmark | <<locked>> | 80% | 41,379 psi | 70% | 2480 fps | 98.8% |
| Hodgdon BL-C2 | <<locked>> | 80% | 37,159 psi | 63% | 2487 fps | 97.9% |
| Hodgdon CFE223 | <<locked>> | 80% | 40,872 psi | 70% | 2608 fps | 96.5% |
| Hodgdon H322 | <<locked>> | 80% | 44,773 psi | 76% | 2585 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 45,411 psi | 77% | 2605 fps | 100% |
| Hodgdon H380 | <<locked>> | 90% | 43,366 psi | 74% | 2595 fps | 95.8% |
| Hodgdon H4895 | <<locked>> | 80% | 37,449 psi | 64% | 2470 fps | 96.7% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 33,765 psi | 57% | 2421 fps | 95% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 33,330 psi | 57% | 2425 fps | 95.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,541 psi | 43% | 1476 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 36,071 psi | 61% | 2425 fps | 96.2% |
| IMR 3031 | <<locked>> | 80% | 36,230 psi | 62% | 2477 fps | 99.9% |
| IMR 4064 | <<locked>> | 84% | 37,768 psi | 64% | 2451 fps | 95.6% |
| IMR 4198 | <<locked>> | 80% | 46,876 psi | 80% | 2533 fps | 100% |
| IMR 4831 | <<locked>> | 98% | 39,813 psi | 68% | 2569 fps | 95.5% |
| IMR 4895 | <<locked>> | 82% | 36,056 psi | 61% | 2467 fps | 95.7% |
| IMR 8208 XBR | <<locked>> | 80% | 39,247 psi | 67% | 2480 fps | 97.8% |
| Lovex D073.5 | <<locked>> | 80% | 43,555 psi | 74% | 2556 fps | 99.3% |
| Lovex D073.6 | <<locked>> | 80% | 35,317 psi | 60% | 2438 fps | 98.4% |
| Lovex S060 | <<locked>> | 80% | 37,985 psi | 65% | 2411 fps | 96.3% |
| Lovex S062 | <<locked>> | 80% | 32,634 psi | 56% | 2349 fps | 96% |
| Lovex S065 | <<locked>> | 98% | 46,876 psi | 80% | 2628 fps | 95.6% |
| Norma 201 | <<locked>> | 80% | 36,318 psi | 62% | 2418 fps | 97.2% |
| Norma 202 | <<locked>> | 80% | 36,332 psi | 62% | 2434 fps | 99.1% |
| Norma 203B | <<locked>> | 82% | 34,621 psi | 59% | 2425 fps | 95.1% |
| Norma URP | <<locked>> | 98% | 42,003 psi | 72% | 2621 fps | 95.9% |
| Ramshot Big Game | <<locked>> | 84% | 36,782 psi | 63% | 2493 fps | 95.5% |
| Ramshot TAC | <<locked>> | 84% | 44,773 psi | 76% | 2579 fps | 95.3% |
| Ramshot Wild Boar | <<locked>> | 80% | 38,043 psi | 65% | 2487 fps | 96.2% |
| Ramshot X-Terminator | <<locked>> | 80% | 42,583 psi | 72% | 2523 fps | 97.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,686 psi | 44% | 1509 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 44,179 psi | 75% | 2569 fps | 99.6% |
| ReloadSwiss RS 52 | 48.9 gr | 82% | 36,550 psi | 62% | 2526 fps | 95% |
| ReloadSwiss RS 60 | 49.7 gr | 82% | 30,269 psi | 52% | 2388 fps | 95.9% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 41,466 psi | 71% | 2638 fps | 95.4% |
| Rottweil R 901 | <<locked>> | 80% | 39,900 psi | 68% | 2474 fps | 99.5% |
| Rottweil R 902 | <<locked>> | 80% | 34,418 psi | 59% | 2369 fps | 96.6% |
| Rottweil R 903 | <<locked>> | 84% | 31,966 psi | 54% | 2372 fps | 95% |
| Shooters World Long Rifle | <<locked>> | 98% | 46,876 psi | 80% | 2628 fps | 95.6% |
| Shooters World Match Rifle | <<locked>> | 80% | 35,317 psi | 60% | 2438 fps | 98.4% |
| Shooters World Precision | <<locked>> | 80% | 32,634 psi | 56% | 2349 fps | 96% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 46,702 psi | 80% | 2582 fps | 98.9% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 49,313 psi | 84% | 2661 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 35,839 psi | 61% | 2477 fps | 95.3% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 46,934 psi | 80% | 2582 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 42,409 psi | 72% | 2546 fps | 95.3% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 35,795 psi | 61% | 2428 fps | 95.4% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 38,203 psi | 65% | 2395 fps | 99.3% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 31,227 psi | 53% | 2264 fps | 98.8% |
| Somchem S321 | <<locked>> | 80% | 41,989 psi | 71% | 2552 fps | 98.7% |
| Somchem S335 | <<locked>> | 80% | 37,565 psi | 64% | 2398 fps | 99.7% |
| Somchem S341 | <<locked>> | 80% | 36,738 psi | 63% | 2441 fps | 95.7% |
| Somchem S355 | <<locked>> | 84% | 33,040 psi | 56% | 2379 fps | 95.1% |
| Somchem S365 | <<locked>> | 92% | 30,574 psi | 52% | 2398 fps | 95.3% |
| Vihtavuori N130 | <<locked>> | 80% | 43,439 psi | 74% | 2474 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 38,363 psi | 65% | 2402 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 33,460 psi | 57% | 2372 fps | 99.9% |
| Vihtavuori N140 | <<locked>> | 80% | 34,432 psi | 59% | 2375 fps | 99% |
| Vihtavuori N150 | <<locked>> | 82% | 29,428 psi | 50% | 2274 fps | 95.3% |
| Vihtavuori N160 | <<locked>> | 96% | 41,394 psi | 70% | 2572 fps | 95.5% |
| Vihtavuori N530 | <<locked>> | 80% | 39,088 psi | 67% | 2474 fps | 97.9% |
| Vihtavuori N540 | <<locked>> | 80% | 33,025 psi | 56% | 2359 fps | 98.3% |
| Vihtavuori N550 | <<locked>> | 96% | 40,379 psi | 69% | 2572 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 34,679 psi | 59% | 2398 fps | 95.4% |
| Winchester 748 | <<locked>> | 80% | 37,884 psi | 64% | 2507 fps | 98.4% |
| Winchester StaBALL Match | <<locked>> | 80% | 34,838 psi | 59% | 2428 fps | 95.9% |
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 107 powders for 8 x 64 S loaded with the .323 | 180gr | Hornady ECX. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,848 fps; across all powders the maximum-charge window runs from 1,654 fps to 2,848 fps. Accurate 4350 gives the best case fill at 100 %, and 107 of the 107 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (405 MPa), the top charges use 53–90 %, leaving at least 10 % headroom. The 180.0 gr projectile in 0.323" 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 60, ReloadSwiss RS 52 rank at the top here: for 8 x 64 S with the .323 | 180gr | Hornady ECX they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 2700, Alliant Reloder-23, Bofors RP7 burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.