Load Specifications
Load data in caliber 8 x 68 S with .323 | 180gr | Hornady ECX bullet and 101 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 Superformance 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.
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: 25.6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 84% | 55,013 psi | 86% | 2805 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 56,898 psi | 89% | 2881 fps | 100% |
| Accurate 2495 | <<locked>> | 90% | 57,043 psi | 89% | 2874 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 55,666 psi | 87% | 2897 fps | 100% |
| Accurate 2700 | <<locked>> | 90% | 56,710 psi | 89% | 2887 fps | 97.6% |
| Accurate 3100ᴾ | <<locked>> | 100% | 40,857 psi | 64% | 2717 fps | 96.2% |
| Accurate 4064 | <<locked>> | 92% | 57,174 psi | 90% | 2927 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 57,667 psi | 90% | 3022 fps | 99.9% |
| ADI AR 2206H | <<locked>> | 86% | 54,418 psi | 85% | 2913 fps | 100% |
| ADI AR 2208 | <<locked>> | 92% | 55,521 psi | 87% | 2913 fps | 99.9% |
| ADI Benchmark 8208 | <<locked>> | 86% | 56,956 psi | 89% | 2913 fps | 100% |
| Alliant AR-Comp | <<locked>> | 84% | 54,331 psi | 85% | 2838 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 88% | 54,157 psi | 85% | 3035 fps | 99.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 55,361 psi | 87% | 2933 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 90% | 56,072 psi | 88% | 2959 fps | 100% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 54,969 psi | 86% | 3025 fps | 99.9% |
| Alliant Reloder-17 | <<locked>> | 96% | 56,637 psi | 89% | 3064 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 39,059 psi | 61% | 2749 fps | 99% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 43,845 psi | 69% | 2917 fps | 98.4% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 54,375 psi | 85% | 2930 fps | 99.8% |
| Bofors RP3 | <<locked>> | 92% | 56,072 psi | 88% | 2949 fps | 100% |
| Bofors RP7 | <<locked>> | 96% | 56,028 psi | 88% | 2920 fps | 97.8% |
| Hodgdon Benchmark | <<locked>> | 84% | 55,158 psi | 86% | 2844 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 86% | 56,362 psi | 88% | 2943 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 82% | 54,839 psi | 86% | 2995 fps | 99.9% |
| Hodgdon H322 | <<locked>> | 82% | 57,522 psi | 90% | 2900 fps | 100% |
| Hodgdon H380 | <<locked>> | 92% | 57,174 psi | 90% | 2966 fps | 99.7% |
| Hodgdon H414 | <<locked>> | 98% | 56,942 psi | 89% | 3022 fps | 98.6% |
| Hodgdon H4350 | <<locked>> | 96% | 57,479 psi | 90% | 2982 fps | 97.5% |
| Hodgdon H4895 | <<locked>> | 86% | 54,955 psi | 86% | 2923 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 51,343 psi | 80% | 2894 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 88% | 54,389 psi | 85% | 2956 fps | 100% |
| Hodgdon Superformance | <<locked>> | 96% | 53,824 psi | 84% | 3002 fps | 97.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,418 psi | 56% | 1781 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 56,333 psi | 88% | 2927 fps | 100% |
| IMR 3031 | <<locked>> | 86% | 54,795 psi | 86% | 2900 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 54,853 psi | 86% | 2894 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 88% | 54,998 psi | 86% | 2877 fps | 98.1% |
| IMR 4350ᴾ | <<locked>> | 100% | 56,550 psi | 89% | 2949 fps | 97.9% |
| IMR 4451 Enduron | <<locked>> | 94% | 54,737 psi | 86% | 2904 fps | 98% |
| IMR 4831ᴾ | <<locked>> | 100% | 54,273 psi | 85% | 2956 fps | 99.8% |
| IMR 4895 | <<locked>> | 90% | 57,522 psi | 90% | 2989 fps | 100% |
| IMR 8208 XBR | <<locked>> | 86% | 56,956 psi | 89% | 2913 fps | 100% |
| Lovex D073.5 | <<locked>> | 82% | 57,130 psi | 90% | 2897 fps | 100% |
| Lovex D073.6 | <<locked>> | 88% | 57,624 psi | 90% | 2933 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 57,363 psi | 90% | 2890 fps | 100% |
| Lovex S062 | <<locked>> | 90% | 54,708 psi | 86% | 2890 fps | 100% |
| Lovex S065 | <<locked>> | 98% | 57,392 psi | 90% | 2946 fps | 99.3% |
| Lovex S070 | <<locked>> | 98% | 54,752 psi | 86% | 2930 fps | 98.3% |
| Norma 201 | <<locked>> | 88% | 56,289 psi | 88% | 2904 fps | 100% |
| Norma 202 | <<locked>> | 88% | 57,174 psi | 90% | 2907 fps | 100% |
| Norma 203B | <<locked>> | 90% | 55,245 psi | 87% | 2946 fps | 100% |
| Norma 204ᴾ | <<locked>> | 100% | 57,566 psi | 90% | 3005 fps | 96.9% |
| Norma URPᴾ | <<locked>> | 100% | 56,449 psi | 88% | 3005 fps | 99.8% |
| Ramshot Big Game | <<locked>> | 90% | 55,999 psi | 88% | 2972 fps | 100% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 55,448 psi | 87% | 3005 fps | 99% |
| Ramshot TAC | <<locked>> | 86% | 57,348 psi | 90% | 2936 fps | 99.4% |
| Ramshot Wild Boar | <<locked>> | 86% | 56,942 psi | 89% | 2956 fps | 100% |
| Ramshot X-Terminator | <<locked>> | 84% | 57,740 psi | 90% | 2913 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,737 psi | 56% | 1821 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 56,275 psi | 88% | 2890 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 57,566 psi | 90% | 2949 fps | 98.9% |
| ReloadSwiss RS 52 | <<locked>> | 88% | 56,753 psi | 89% | 3028 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 56,289 psi | 88% | 3061 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 57,363 psi | 90% | 3045 fps | 99.8% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 56,985 psi | 89% | 3077 fps | 99.8% |
| Rottweil R 901 | <<locked>> | 86% | 57,174 psi | 90% | 2884 fps | 100% |
| Rottweil R 902 | <<locked>> | 90% | 56,826 psi | 89% | 2904 fps | 100% |
| Rottweil R 903 | <<locked>> | 94% | 55,941 psi | 88% | 2943 fps | 100% |
| Rottweil R 907 | <<locked>> | 96% | 56,028 psi | 88% | 2920 fps | 97.8% |
| Shooters World Long Rifle | <<locked>> | 98% | 57,392 psi | 90% | 2946 fps | 99.3% |
| Shooters World Match Rifle | <<locked>> | 88% | 57,624 psi | 90% | 2933 fps | 100% |
| Shooters World Precision | <<locked>> | 90% | 54,708 psi | 86% | 2890 fps | 100% |
| Shooters World SW4350 | <<locked>> | 98% | 54,752 psi | 86% | 2930 fps | 98.3% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 54,302 psi | 85% | 2953 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 55,738 psi | 87% | 2913 fps | 99.5% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 56,391 psi | 88% | 2936 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 54,592 psi | 86% | 2795 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 54,984 psi | 86% | 2795 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 54,172 psi | 85% | 2844 fps | 98% |
| Somchem S321 | <<locked>> | 82% | 54,389 psi | 85% | 2894 fps | 100% |
| Somchem S335 | <<locked>> | 88% | 57,217 psi | 90% | 2835 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 55,434 psi | 87% | 2907 fps | 100% |
| Somchem S355 | <<locked>> | 94% | 56,014 psi | 88% | 2936 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 50,821 psi | 80% | 2953 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 47,065 psi | 74% | 2828 fps | 96.1% |
| Vihtavuori N130 | <<locked>> | 82% | 54,433 psi | 85% | 2756 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 54,911 psi | 86% | 2779 fps | 100% |
| Vihtavuori N135 | <<locked>> | 90% | 56,884 psi | 89% | 2864 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 54,201 psi | 85% | 2835 fps | 100% |
| Vihtavuori N150 | <<locked>> | 96% | 57,725 psi | 90% | 2913 fps | 100% |
| Vihtavuori N160 | <<locked>> | 98% | 55,550 psi | 87% | 2953 fps | 99.7% |
| Vihtavuori N530 | <<locked>> | 86% | 57,421 psi | 90% | 2913 fps | 100% |
| Vihtavuori N540 | <<locked>> | 90% | 55,724 psi | 87% | 2881 fps | 100% |
| Vihtavuori N550 | <<locked>> | 98% | 54,491 psi | 85% | 2956 fps | 99.6% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 42,960 psi | 67% | 2828 fps | 98.9% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 55,927 psi | 88% | 2927 fps | 100% |
| Winchester 748 | <<locked>> | 86% | 57,595 psi | 90% | 2963 fps | 100% |
| Winchester 760 | <<locked>> | 98% | 56,942 psi | 89% | 3022 fps | 98.6% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 34,998 psi | 55% | 2756 fps | 99% |
| Winchester StaBALL Match | <<locked>> | 88% | 56,275 psi | 88% | 2943 fps | 100% |
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% | 48,457 psi | 76% | 2710 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 53,345 psi | 84% | 2831 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 40,901 psi | 64% | 2631 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 48,356 psi | 76% | 2792 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 46,398 psi | 73% | 2717 fps | 95.5% |
| Accurate 3100 | <<locked>> | 98% | 38,029 psi | 60% | 2661 fps | 95.3% |
| Accurate 4064 | <<locked>> | 80% | 38,740 psi | 61% | 2628 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 32,634 psi | 51% | 2552 fps | 95.3% |
| ADI AR 2206H | <<locked>> | 80% | 44,904 psi | 70% | 2753 fps | 99.4% |
| ADI AR 2208 | <<locked>> | 80% | 38,043 psi | 60% | 2595 fps | 97.6% |
| ADI Benchmark 8208 | <<locked>> | 80% | 47,007 psi | 74% | 2759 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 47,500 psi | 74% | 2743 fps | 100% |
| Alliant Power Pro 2000-MR | 59.6 gr | 80% | 40,799 psi | 64% | 2782 fps | 98.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 37,724 psi | 59% | 2618 fps | 98.9% |
| Alliant Reloder-15 | <<locked>> | 80% | 40,524 psi | 64% | 2684 fps | 98.4% |
| Alliant Reloder-16 | <<locked>> | 84% | 33,098 psi | 52% | 2569 fps | 95.5% |
| Alliant Reloder-17 | 58.7 gr | 80% | 32,445 psi | 51% | 2582 fps | 97.1% |
| Alliant Reloder-23 | <<locked>> | 90% | 28,500 psi | 45% | 2470 fps | 95% |
| Alliant Reloder-26 | <<locked>> | 94% | 35,331 psi | 55% | 2717 fps | 95.6% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 44,121 psi | 69% | 2756 fps | 98.6% |
| Bofors RP3 | <<locked>> | 80% | 37,188 psi | 58% | 2618 fps | 98.9% |
| Bofors RP7 | <<locked>> | 88% | 43,482 psi | 68% | 2700 fps | 95% |
| Hodgdon Benchmark | <<locked>> | 80% | 48,631 psi | 76% | 2746 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 45,745 psi | 72% | 2779 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 80% | 50,821 psi | 80% | 2933 fps | 99.7% |
| Hodgdon H322 | <<locked>> | 80% | 53,838 psi | 84% | 2851 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 38,101 psi | 60% | 2625 fps | 96.6% |
| Hodgdon H414 | <<locked>> | 90% | 43,323 psi | 68% | 2785 fps | 95.8% |
| Hodgdon H4350 | <<locked>> | 90% | 47,413 psi | 74% | 2815 fps | 95.3% |
| Hodgdon H4895 | <<locked>> | 80% | 45,310 psi | 71% | 2762 fps | 99.7% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 28,384 psi | 44% | 2411 fps | 95.3% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 41,394 psi | 65% | 2733 fps | 99.5% |
| Hodgdon Superformance | 69.8 gr | 90% | 43,163 psi | 68% | 2802 fps | 95.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,353 psi | 41% | 1591 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 43,482 psi | 68% | 2713 fps | 99.5% |
| IMR 3031 | <<locked>> | 80% | 45,063 psi | 71% | 2756 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 39,943 psi | 63% | 2631 fps | 98.3% |
| IMR 4166 Enduron | <<locked>> | 80% | 42,453 psi | 67% | 2651 fps | 95.4% |
| IMR 4350 | <<locked>> | 92% | 43,801 psi | 69% | 2730 fps | 95.2% |
| IMR 4451 Enduron | <<locked>> | 86% | 42,728 psi | 67% | 2687 fps | 95.3% |
| IMR 4831 | <<locked>> | 84% | 31,734 psi | 50% | 2513 fps | 95% |
| IMR 4895 | <<locked>> | 80% | 41,539 psi | 65% | 2717 fps | 99% |
| IMR 8208 XBR | <<locked>> | 80% | 47,007 psi | 74% | 2759 fps | 100% |
| Lovex D073.5 | <<locked>> | 80% | 53,287 psi | 84% | 2844 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 43,947 psi | 69% | 2726 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 44,962 psi | 70% | 2687 fps | 99.4% |
| Lovex S062 | <<locked>> | 80% | 39,885 psi | 63% | 2635 fps | 99.5% |
| Lovex S065 | <<locked>> | 84% | 36,999 psi | 58% | 2575 fps | 95.2% |
| Lovex S070 | <<locked>> | 90% | 42,511 psi | 67% | 2710 fps | 95.7% |
| Norma 201 | <<locked>> | 80% | 43,830 psi | 69% | 2700 fps | 99.8% |
| Norma 202 | <<locked>> | 80% | 44,295 psi | 69% | 2710 fps | 100% |
| Norma 203B | <<locked>> | 80% | 39,914 psi | 63% | 2674 fps | 98.7% |
| Norma 204 | <<locked>> | 96% | 50,169 psi | 79% | 2884 fps | 95.4% |
| Norma URP | <<locked>> | 84% | 33,083 psi | 52% | 2559 fps | 95.3% |
| Ramshot Big Game | <<locked>> | 80% | 39,465 psi | 62% | 2684 fps | 98.5% |
| Ramshot Hunter | <<locked>> | 90% | 39,566 psi | 62% | 2717 fps | 95.6% |
| Ramshot TAC | <<locked>> | 80% | 47,021 psi | 74% | 2769 fps | 98% |
| Ramshot Wild Boar | <<locked>> | 80% | 46,427 psi | 73% | 2785 fps | 99.5% |
| Ramshot X-Terminator | <<locked>> | 80% | 50,575 psi | 79% | 2808 fps | 99.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,527 psi | 42% | 1627 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 52,765 psi | 83% | 2841 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 41,292 psi | 65% | 2667 fps | 95.8% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 42,815 psi | 67% | 2792 fps | 98.8% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 34,606 psi | 54% | 2654 fps | 99.6% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 34,969 psi | 55% | 2635 fps | 95.8% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 37,594 psi | 59% | 2700 fps | 95.9% |
| Rottweil R 901 | <<locked>> | 80% | 47,630 psi | 75% | 2740 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 41,655 psi | 65% | 2651 fps | 99.6% |
| Rottweil R 903 | <<locked>> | 80% | 34,969 psi | 55% | 2562 fps | 98.1% |
| Rottweil R 907 | <<locked>> | 88% | 43,482 psi | 68% | 2700 fps | 95% |
| Shooters World Long Rifle | <<locked>> | 84% | 36,999 psi | 58% | 2575 fps | 95.2% |
| Shooters World Match Rifle | <<locked>> | 80% | 43,947 psi | 69% | 2726 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 39,885 psi | 63% | 2635 fps | 99.5% |
| Shooters World SW4350 | <<locked>> | 90% | 42,511 psi | 67% | 2710 fps | 95.7% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 36,100 psi | 57% | 2615 fps | 97.7% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 45,208 psi | 71% | 2740 fps | 98.2% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 43,366 psi | 68% | 2720 fps | 99.2% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 45,165 psi | 71% | 2651 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 37,536 psi | 59% | 2513 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 41,539 psi | 65% | 2625 fps | 95.2% |
| Somchem S321 | <<locked>> | 80% | 50,807 psi | 80% | 2838 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 44,846 psi | 70% | 2654 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 44,889 psi | 70% | 2733 fps | 99.3% |
| Somchem S355 | <<locked>> | 80% | 35,882 psi | 56% | 2572 fps | 98.1% |
| Somchem S365 | <<locked>> | 80% | 25,875 psi | 41% | 2392 fps | 95.6% |
| Somchem S385 | <<locked>> | 98% | 44,005 psi | 69% | 2772 fps | 95.2% |
| Vihtavuori N130 | <<locked>> | 80% | 50,995 psi | 80% | 2710 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 45,571 psi | 71% | 2644 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 41,147 psi | 64% | 2631 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 41,916 psi | 66% | 2641 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 34,142 psi | 54% | 2507 fps | 98.8% |
| Vihtavuori N160 | <<locked>> | 84% | 34,708 psi | 54% | 2566 fps | 95.8% |
| Vihtavuori N530 | <<locked>> | 80% | 47,094 psi | 74% | 2756 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 40,321 psi | 63% | 2631 fps | 100% |
| Vihtavuori N550 | <<locked>> | 84% | 34,142 psi | 54% | 2566 fps | 95.4% |
| Vihtavuori N555 | <<locked>> | 90% | 30,501 psi | 48% | 2543 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 30,182 psi | 47% | 2428 fps | 96.4% |
| Winchester 748 | <<locked>> | 80% | 46,905 psi | 74% | 2802 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 43,540 psi | 68% | 2789 fps | 95.9% |
| Winchester StaBALL HD | <<locked>> | 94% | 28,587 psi | 45% | 2546 fps | 95.6% |
| Winchester StaBALL Match | <<locked>> | 80% | 42,844 psi | 67% | 2723 fps | 99.5% |
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 119 powders for 8 x 68 S loaded with the .323 | 180gr | Hornady ECX. ReloadSwiss RS 70 delivers the highest muzzle velocity at 3,077 fps; across all powders the maximum-charge window runs from 1,781 fps to 3,077 fps. Accurate 3100 gives the best case fill at 100 %, and 119 of the 119 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 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 3100, Accurate 4350, ADI AR 2209 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 Superformance, Alliant Reloder-17 rank at the top here: for 8 x 68 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, Alliant Reloder-22, Alliant Reloder-25, Bofors RP15 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.