Load Specifications
Load data in caliber 8 x 75 RS with .323 | 180gr | Hornady ECX bullet and 84 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 70, 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: 25.6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 82% | 49,487 psi | 90% | 2700 fps | 100% |
| Accurate 2495 | <<locked>> | 86% | 47,297 psi | 86% | 2713 fps | 100% |
| Accurate 2520 | <<locked>> | 82% | 49,182 psi | 89% | 2779 fps | 100% |
| Accurate 4064 | <<locked>> | 88% | 47,543 psi | 86% | 2759 fps | 100% |
| Accurate 4350 | <<locked>> | 96% | 46,833 psi | 85% | 2825 fps | 98.7% |
| ADI AR 2206H | <<locked>> | 84% | 48,689 psi | 88% | 2789 fps | 99.6% |
| ADI AR 2208 | <<locked>> | 90% | 49,763 psi | 90% | 2792 fps | 99.3% |
| ADI Benchmark 8208 | <<locked>> | 82% | 47,979 psi | 87% | 2746 fps | 99.9% |
| Alliant AR-Comp | <<locked>> | 82% | 48,153 psi | 87% | 2726 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 47,935 psi | 87% | 2894 fps | 99.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 90% | 49,414 psi | 90% | 2812 fps | 99.9% |
| Alliant Reloder-15 | <<locked>> | 86% | 46,789 psi | 85% | 2776 fps | 99.1% |
| Alliant Reloder-16 | <<locked>> | 98% | 48,979 psi | 89% | 2890 fps | 99.2% |
| Alliant Reloder-17 | <<locked>> | 94% | 49,705 psi | 90% | 2927 fps | 99.9% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 36,869 psi | 67% | 2667 fps | 98% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 41,162 psi | 75% | 2825 fps | 97.1% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 48,298 psi | 88% | 2799 fps | 98.9% |
| Bofors RP3 | <<locked>> | 90% | 49,647 psi | 90% | 2825 fps | 99.9% |
| Hodgdon Benchmark | <<locked>> | 82% | 49,676 psi | 90% | 2733 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 82% | 46,586 psi | 85% | 2766 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 47,326 psi | 86% | 2779 fps | 98.3% |
| Hodgdon H414 | <<locked>> | 94% | 46,847 psi | 85% | 2822 fps | 96.2% |
| Hodgdon H4895 | <<locked>> | 84% | 49,139 psi | 89% | 2799 fps | 99.8% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 48,385 psi | 88% | 2822 fps | 99.8% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 48,240 psi | 88% | 2831 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,215 psi | 64% | 1749 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 47,268 psi | 86% | 2753 fps | 99.6% |
| IMR 3031 | <<locked>> | 84% | 48,805 psi | 89% | 2789 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 49,168 psi | 89% | 2772 fps | 99.4% |
| IMR 4166 Enduron | <<locked>> | 86% | 49,400 psi | 90% | 2749 fps | 96.6% |
| IMR 4451 Enduron | <<locked>> | 92% | 49,110 psi | 89% | 2772 fps | 96.4% |
| IMR 4831 | <<locked>> | 98% | 47,819 psi | 87% | 2822 fps | 98.9% |
| IMR 4895 | <<locked>> | 86% | 47,964 psi | 87% | 2808 fps | 99.6% |
| IMR 8208 XBR | <<locked>> | 82% | 47,979 psi | 87% | 2746 fps | 99.9% |
| Lovex D073.6 | <<locked>> | 84% | 47,761 psi | 87% | 2766 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 48,776 psi | 89% | 2723 fps | 99.6% |
| Lovex S062 | <<locked>> | 88% | 48,965 psi | 89% | 2772 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 48,196 psi | 87% | 2766 fps | 97.7% |
| Lovex S070 | <<locked>> | 96% | 48,820 psi | 89% | 2795 fps | 96.8% |
| Norma 201 | <<locked>> | 84% | 47,500 psi | 86% | 2740 fps | 99.9% |
| Norma 202 | <<locked>> | 84% | 47,993 psi | 87% | 2746 fps | 100% |
| Norma 203B | <<locked>> | 88% | 49,269 psi | 89% | 2822 fps | 99.6% |
| Norma URP | <<locked>> | 98% | 49,821 psi | 90% | 2874 fps | 99% |
| Ramshot Big Game | <<locked>> | 88% | 49,501 psi | 90% | 2841 fps | 99.6% |
| Ramshot Hunter | <<locked>> | 98% | 48,950 psi | 89% | 2867 fps | 97.6% |
| Ramshot TAC | <<locked>> | 82% | 47,863 psi | 87% | 2749 fps | 97.8% |
| Ramshot Wild Boar | <<locked>> | 82% | 47,369 psi | 86% | 2772 fps | 99.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,534 psi | 64% | 1791 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 47,906 psi | 87% | 2762 fps | 96.9% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 46,543 psi | 84% | 2831 fps | 99.1% |
| ReloadSwiss RS 60 | <<locked>> | 92% | 49,516 psi | 90% | 2930 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 46,717 psi | 85% | 2848 fps | 98.4% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 46,934 psi | 85% | 2871 fps | 98.1% |
| Rottweil R 901 | <<locked>> | 82% | 48,356 psi | 88% | 2723 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 48,022 psi | 87% | 2736 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 92% | 49,530 psi | 90% | 2818 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 94% | 48,196 psi | 87% | 2766 fps | 97.7% |
| Shooters World Match Rifle | <<locked>> | 84% | 47,761 psi | 87% | 2766 fps | 100% |
| Shooters World Precision | <<locked>> | 88% | 48,965 psi | 89% | 2772 fps | 100% |
| Shooters World SW4350 | <<locked>> | 96% | 48,820 psi | 89% | 2795 fps | 96.8% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 48,138 psi | 87% | 2825 fps | 99.5% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 49,458 psi | 90% | 2782 fps | 98.5% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 47,137 psi | 86% | 2759 fps | 99.4% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 49,313 psi | 89% | 2690 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 49,211 psi | 89% | 2687 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 48,225 psi | 88% | 2717 fps | 96.3% |
| Somchem S335 | <<locked>> | 84% | 48,617 psi | 88% | 2687 fps | 100% |
| Somchem S341 | <<locked>> | 84% | 49,226 psi | 89% | 2779 fps | 99.6% |
| Somchem S355 | <<locked>> | 90% | 47,007 psi | 85% | 2766 fps | 99.6% |
| Somchem S365ᴾ | <<locked>> | 100% | 47,587 psi | 86% | 2874 fps | 100% |
| Vihtavuori N133 | <<locked>> | 84% | 49,603 psi | 90% | 2677 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 47,500 psi | 86% | 2710 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 48,457 psi | 88% | 2726 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 48,254 psi | 88% | 2749 fps | 100% |
| Vihtavuori N160 | <<locked>> | 96% | 49,023 psi | 89% | 2818 fps | 98.8% |
| Vihtavuori N530 | <<locked>> | 82% | 48,153 psi | 87% | 2743 fps | 99.9% |
| Vihtavuori N540 | <<locked>> | 88% | 49,792 psi | 90% | 2766 fps | 100% |
| Vihtavuori N550 | <<locked>> | 96% | 48,124 psi | 87% | 2822 fps | 98.6% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 40,089 psi | 73% | 2746 fps | 98% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 49,545 psi | 90% | 2802 fps | 99.9% |
| Winchester 748 | <<locked>> | 82% | 47,659 psi | 86% | 2785 fps | 100% |
| Winchester 760 | <<locked>> | 94% | 47,079 psi | 85% | 2825 fps | 96.3% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 32,793 psi | 60% | 2648 fps | 97.4% |
| Winchester StaBALL Match | <<locked>> | 84% | 46,630 psi | 85% | 2762 fps | 99.6% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 25.6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 80% | 46,383 psi | 84% | 2651 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 38,667 psi | 70% | 2569 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 45,847 psi | 83% | 2723 fps | 100% |
| Accurate 4064 | <<locked>> | 80% | 36,593 psi | 66% | 2562 fps | 99.9% |
| Accurate 4350 | <<locked>> | 88% | 35,273 psi | 64% | 2592 fps | 95.8% |
| ADI AR 2206H | <<locked>> | 80% | 42,714 psi | 78% | 2680 fps | 98.8% |
| ADI AR 2208 | <<locked>> | 80% | 36,434 psi | 66% | 2530 fps | 96.7% |
| ADI Benchmark 8208 | <<locked>> | 80% | 44,860 psi | 81% | 2690 fps | 99.7% |
| Alliant AR-Comp | <<locked>> | 80% | 44,933 psi | 82% | 2680 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 38,783 psi | 70% | 2703 fps | 97.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 35,824 psi | 65% | 2552 fps | 98.1% |
| Alliant Reloder-15 | <<locked>> | 80% | 38,464 psi | 70% | 2612 fps | 97.5% |
| Alliant Reloder-16 | <<locked>> | 86% | 33,562 psi | 61% | 2549 fps | 95% |
| Alliant Reloder-17 | 55.9 gr | 80% | 30,734 psi | 56% | 2503 fps | 95.7% |
| Alliant Reloder-23 | <<locked>> | 94% | 30,574 psi | 55% | 2500 fps | 95.5% |
| Alliant Reloder-26 | <<locked>> | 98% | 38,189 psi | 69% | 2753 fps | 96.1% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 42,032 psi | 76% | 2684 fps | 97.8% |
| Bofors RP3 | <<locked>> | 80% | 35,128 psi | 64% | 2546 fps | 98.1% |
| Hodgdon Benchmark | <<locked>> | 80% | 46,702 psi | 85% | 2684 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 43,497 psi | 79% | 2710 fps | 99.8% |
| Hodgdon H380 | <<locked>> | 80% | 36,172 psi | 66% | 2552 fps | 95.4% |
| Hodgdon H414 | <<locked>> | 92% | 43,700 psi | 79% | 2762 fps | 95.3% |
| Hodgdon H4895 | <<locked>> | 80% | 43,120 psi | 78% | 2690 fps | 99.2% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 30,705 psi | 56% | 2448 fps | 95.9% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 39,102 psi | 71% | 2661 fps | 98.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,136 psi | 47% | 1562 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 41,611 psi | 76% | 2648 fps | 99% |
| IMR 3031 | <<locked>> | 80% | 42,627 psi | 77% | 2687 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 38,232 psi | 69% | 2566 fps | 97.5% |
| IMR 4166 Enduron | <<locked>> | 82% | 43,453 psi | 79% | 2641 fps | 95.1% |
| IMR 4451 Enduron | <<locked>> | 88% | 43,468 psi | 79% | 2671 fps | 95% |
| IMR 4831 | <<locked>> | 88% | 34,243 psi | 62% | 2549 fps | 95.5% |
| IMR 4895 | <<locked>> | 80% | 39,407 psi | 72% | 2644 fps | 98.3% |
| IMR 8208 XBR | <<locked>> | 80% | 44,860 psi | 81% | 2690 fps | 99.7% |
| Lovex D073.6 | <<locked>> | 80% | 41,713 psi | 76% | 2661 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 43,091 psi | 78% | 2621 fps | 98.9% |
| Lovex S062 | <<locked>> | 80% | 37,942 psi | 69% | 2566 fps | 98.9% |
| Lovex S065 | <<locked>> | 88% | 39,972 psi | 73% | 2608 fps | 95.7% |
| Lovex S070 | <<locked>> | 92% | 43,062 psi | 78% | 2690 fps | 95.3% |
| Norma 201 | <<locked>> | 80% | 41,814 psi | 76% | 2635 fps | 99.4% |
| Norma 202 | <<locked>> | 80% | 42,235 psi | 77% | 2644 fps | 100% |
| Norma 203B | <<locked>> | 80% | 37,811 psi | 69% | 2598 fps | 97.8% |
| Norma URP | <<locked>> | 88% | 35,723 psi | 65% | 2595 fps | 95.8% |
| Ramshot Big Game | <<locked>> | 80% | 37,405 psi | 68% | 2612 fps | 97.6% |
| Ramshot Hunter | <<locked>> | 92% | 40,001 psi | 73% | 2690 fps | 95.1% |
| Ramshot TAC | <<locked>> | 80% | 44,831 psi | 81% | 2694 fps | 97.1% |
| Ramshot Wild Boar | <<locked>> | 80% | 44,295 psi | 80% | 2717 fps | 99% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,310 psi | 48% | 1598 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 42,105 psi | 76% | 2651 fps | 95.4% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 40,422 psi | 73% | 2717 fps | 97.9% |
| ReloadSwiss RS 60 | 55.9 gr | 80% | 32,808 psi | 60% | 2575 fps | 98.9% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 35,230 psi | 64% | 2612 fps | 95.3% |
| ReloadSwiss RS 70 | 63.9 gr | 90% | 38,145 psi | 69% | 2680 fps | 95.4% |
| Rottweil R 901 | <<locked>> | 80% | 45,614 psi | 83% | 2677 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 39,682 psi | 72% | 2582 fps | 99.1% |
| Rottweil R 903 | <<locked>> | 80% | 33,112 psi | 60% | 2493 fps | 97.2% |
| Shooters World Long Rifle | <<locked>> | 88% | 39,972 psi | 73% | 2608 fps | 95.7% |
| Shooters World Match Rifle | <<locked>> | 80% | 41,713 psi | 76% | 2661 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 37,942 psi | 69% | 2566 fps | 98.9% |
| Shooters World SW4350 | <<locked>> | 92% | 43,062 psi | 78% | 2690 fps | 95.3% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 34,243 psi | 62% | 2543 fps | 96.6% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 42,888 psi | 78% | 2664 fps | 97.2% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 41,423 psi | 75% | 2651 fps | 98.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 43,294 psi | 79% | 2589 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 35,824 psi | 65% | 2454 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 45,179 psi | 82% | 2664 fps | 95.6% |
| Somchem S335 | <<locked>> | 80% | 42,902 psi | 78% | 2592 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 42,786 psi | 78% | 2667 fps | 98.8% |
| Somchem S355 | <<locked>> | 80% | 34,084 psi | 62% | 2500 fps | 97.2% |
| Somchem S365 | <<locked>> | 82% | 26,179 psi | 48% | 2372 fps | 95.1% |
| Vihtavuori N133 | <<locked>> | 80% | 43,642 psi | 79% | 2585 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 39,073 psi | 71% | 2569 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 39,987 psi | 73% | 2582 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 32,430 psi | 59% | 2441 fps | 98% |
| Vihtavuori N160 | <<locked>> | 86% | 35,027 psi | 64% | 2546 fps | 95.4% |
| Vihtavuori N530 | <<locked>> | 80% | 44,933 psi | 82% | 2687 fps | 99.8% |
| Vihtavuori N540 | <<locked>> | 80% | 38,392 psi | 70% | 2566 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 86% | 34,461 psi | 63% | 2546 fps | 95% |
| Vihtavuori N555 | <<locked>> | 94% | 32,619 psi | 59% | 2575 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 28,790 psi | 52% | 2356 fps | 95% |
| Winchester 748 | <<locked>> | 80% | 44,469 psi | 81% | 2733 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 43,932 psi | 80% | 2766 fps | 95.4% |
| Winchester StaBALL HD | <<locked>> | 98% | 30,821 psi | 56% | 2582 fps | 96.2% |
| Winchester StaBALL Match | <<locked>> | 80% | 40,669 psi | 74% | 2651 fps | 98.9% |
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 75 RS loaded with the .323 | 180gr | Hornady ECX. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,930 fps; across all powders the maximum-charge window runs from 1,749 fps to 2,930 fps. Accurate 3100 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 (380 MPa), the top charges use 57–90 %, 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 3100, ADI AR 2209, Alliant Reloder-19 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 70, ReloadSwiss RS 60, Alliant Reloder-17 rank at the top here: for 8 x 75 RS 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 3100, ADI AR 2209, Alliant Reloder-19 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.