Load Specifications
Load data in caliber 8 x 68 S with .323 | 175gr | Sierra Pro-Hunter bullet and 98 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% | 56,391 psi | 88% | 2864 fps | 100% |
| Accurate 2495 | <<locked>> | 88% | 55,274 psi | 87% | 2890 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 57,072 psi | 89% | 2959 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 54,230 psi | 85% | 2887 fps | 97.1% |
| Accurate 3100ᴾ | <<locked>> | 100% | 42,424 psi | 66% | 2782 fps | 96.4% |
| Accurate 4064 | <<locked>> | 90% | 55,317 psi | 87% | 2940 fps | 100% |
| Accurate 4350 | <<locked>> | 98% | 55,434 psi | 87% | 3028 fps | 99.7% |
| ADI AR 2206H | <<locked>> | 86% | 55,637 psi | 87% | 2972 fps | 100% |
| ADI AR 2208 | <<locked>> | 92% | 56,492 psi | 89% | 2969 fps | 99.9% |
| ADI Benchmark 8208 | <<locked>> | 84% | 54,447 psi | 85% | 2920 fps | 100% |
| Alliant AR-Comp | <<locked>> | 84% | 55,550 psi | 87% | 2894 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 88% | 55,317 psi | 87% | 3097 fps | 99.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 56,768 psi | 89% | 2995 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 90% | 57,203 psi | 90% | 3015 fps | 100% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 56,275 psi | 88% | 3084 fps | 99.9% |
| Alliant Reloder-17 | <<locked>> | 94% | 54,070 psi | 85% | 3068 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 40,335 psi | 63% | 2812 fps | 99.1% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 45,440 psi | 71% | 2986 fps | 98.6% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 55,535 psi | 87% | 2989 fps | 99.8% |
| Bofors RP3 | <<locked>> | 92% | 57,624 psi | 90% | 3012 fps | 100% |
| Bofors RP7 | <<locked>> | 96% | 57,522 psi | 90% | 2982 fps | 97.9% |
| Hodgdon Benchmark | <<locked>> | 84% | 56,072 psi | 88% | 2900 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 84% | 54,070 psi | 85% | 2953 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 82% | 55,970 psi | 88% | 3054 fps | 99.9% |
| Hodgdon H380 | <<locked>> | 90% | 54,723 psi | 86% | 2972 fps | 99.4% |
| Hodgdon H414 | <<locked>> | 96% | 54,418 psi | 85% | 3022 fps | 98.1% |
| Hodgdon H4350 | <<locked>> | 94% | 54,998 psi | 86% | 2982 fps | 96.9% |
| Hodgdon H4895 | <<locked>> | 86% | 56,260 psi | 88% | 2982 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 52,765 psi | 83% | 2956 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 88% | 55,709 psi | 87% | 3015 fps | 100% |
| Hodgdon Superformance | <<locked>> | 96% | 55,100 psi | 86% | 3061 fps | 97.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,549 psi | 56% | 1814 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 57,392 psi | 90% | 2986 fps | 100% |
| IMR 3031 | <<locked>> | 86% | 56,246 psi | 88% | 2963 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 55,970 psi | 88% | 2953 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 88% | 55,970 psi | 88% | 2933 fps | 98.1% |
| IMR 4350 | <<locked>> | 98% | 54,273 psi | 85% | 2953 fps | 97.4% |
| IMR 4451 Enduron | <<locked>> | 94% | 55,840 psi | 88% | 2959 fps | 98% |
| IMR 4831ᴾ | <<locked>> | 100% | 55,724 psi | 87% | 3015 fps | 99.8% |
| IMR 4895 | <<locked>> | 88% | 55,201 psi | 87% | 2995 fps | 100% |
| IMR 8208 XBR | <<locked>> | 84% | 54,447 psi | 85% | 2920 fps | 100% |
| Lovex D073.6 | <<locked>> | 86% | 55,376 psi | 87% | 2946 fps | 100% |
| Lovex S060 | <<locked>> | 86% | 54,984 psi | 86% | 2897 fps | 100% |
| Lovex S062 | <<locked>> | 90% | 56,014 psi | 88% | 2949 fps | 100% |
| Lovex S065 | <<locked>> | 96% | 55,143 psi | 86% | 2953 fps | 99% |
| Lovex S070 | <<locked>> | 98% | 56,231 psi | 88% | 2989 fps | 98.4% |
| Norma 201 | <<locked>> | 88% | 57,725 psi | 90% | 2963 fps | 100% |
| Norma 202 | <<locked>> | 86% | 54,926 psi | 86% | 2917 fps | 100% |
| Norma 203B | <<locked>> | 90% | 56,434 psi | 88% | 3002 fps | 100% |
| Norma 204 | <<locked>> | 98% | 54,737 psi | 86% | 3002 fps | 96.2% |
| Norma URP | <<locked>> | 98% | 54,244 psi | 85% | 3015 fps | 99.6% |
| Ramshot Big Game | <<locked>> | 90% | 57,188 psi | 90% | 3028 fps | 100% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 56,594 psi | 89% | 3064 fps | 99% |
| Ramshot TAC | <<locked>> | 84% | 54,679 psi | 86% | 2936 fps | 99.1% |
| Ramshot Wild Boar | <<locked>> | 84% | 54,534 psi | 85% | 2959 fps | 100% |
| Ramshot X-Terminator | <<locked>> | 82% | 55,376 psi | 87% | 2923 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,129 psi | 57% | 1860 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 57,522 psi | 90% | 2949 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 54,984 psi | 86% | 2949 fps | 98.5% |
| ReloadSwiss RS 52 | <<locked>> | 86% | 54,302 psi | 85% | 3031 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 57,653 psi | 90% | 3123 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 54,926 psi | 86% | 3048 fps | 99.6% |
| ReloadSwiss RS 70 | <<locked>> | 98% | 54,404 psi | 85% | 3077 fps | 99.5% |
| Rottweil R 901 | <<locked>> | 84% | 55,216 psi | 87% | 2894 fps | 100% |
| Rottweil R 902 | <<locked>> | 88% | 54,752 psi | 86% | 2913 fps | 100% |
| Rottweil R 903 | <<locked>> | 94% | 57,479 psi | 90% | 3005 fps | 100% |
| Rottweil R 907 | <<locked>> | 96% | 57,522 psi | 90% | 2982 fps | 97.9% |
| Shooters World Long Rifle | <<locked>> | 96% | 55,143 psi | 86% | 2953 fps | 99% |
| Shooters World Match Rifle | <<locked>> | 86% | 55,376 psi | 87% | 2946 fps | 100% |
| Shooters World Precision | <<locked>> | 90% | 56,014 psi | 88% | 2949 fps | 100% |
| Shooters World SW4350 | <<locked>> | 98% | 56,231 psi | 88% | 2989 fps | 98.4% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 55,434 psi | 87% | 3012 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 57,101 psi | 89% | 2976 fps | 99.6% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 57,667 psi | 90% | 2995 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 55,695 psi | 87% | 2851 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 56,072 psi | 88% | 2848 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 55,608 psi | 87% | 2904 fps | 98.1% |
| Somchem S321 | <<locked>> | 82% | 55,825 psi | 87% | 2953 fps | 100% |
| Somchem S335 | <<locked>> | 86% | 55,100 psi | 86% | 2848 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 56,637 psi | 89% | 2963 fps | 100% |
| Somchem S355 | <<locked>> | 94% | 57,450 psi | 90% | 2995 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 52,228 psi | 82% | 3015 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 48,631 psi | 76% | 2894 fps | 96.3% |
| Vihtavuori N130 | <<locked>> | 82% | 55,405 psi | 87% | 2808 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 55,970 psi | 88% | 2835 fps | 100% |
| Vihtavuori N135 | <<locked>> | 88% | 54,737 psi | 86% | 2877 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 55,390 psi | 87% | 2894 fps | 100% |
| Vihtavuori N150 | <<locked>> | 94% | 55,593 psi | 87% | 2927 fps | 100% |
| Vihtavuori N160 | <<locked>> | 98% | 56,927 psi | 89% | 3012 fps | 99.8% |
| Vihtavuori N530 | <<locked>> | 84% | 54,984 psi | 86% | 2920 fps | 100% |
| Vihtavuori N540 | <<locked>> | 90% | 57,029 psi | 89% | 2940 fps | 100% |
| Vihtavuori N550 | <<locked>> | 98% | 55,840 psi | 88% | 3015 fps | 99.6% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 44,541 psi | 70% | 2894 fps | 99% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 57,145 psi | 90% | 2986 fps | 100% |
| Winchester 748 | <<locked>> | 84% | 54,911 psi | 86% | 2966 fps | 100% |
| Winchester 760 | <<locked>> | 96% | 54,665 psi | 86% | 3025 fps | 98.1% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 36,216 psi | 57% | 2822 fps | 99.2% |
| Winchester StaBALL Match | <<locked>> | 88% | 57,551 psi | 90% | 3002 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% | 49,908 psi | 78% | 2772 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 42,612 psi | 67% | 2697 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 49,835 psi | 78% | 2851 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 47,747 psi | 75% | 2779 fps | 95.7% |
| Accurate 3100 | <<locked>> | 98% | 39,639 psi | 62% | 2726 fps | 95.6% |
| Accurate 4064 | <<locked>> | 80% | 40,292 psi | 63% | 2690 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 33,997 psi | 53% | 2618 fps | 95.6% |
| ADI AR 2206H | <<locked>> | 80% | 46,079 psi | 72% | 2812 fps | 99.4% |
| ADI AR 2208 | <<locked>> | 80% | 39,146 psi | 61% | 2654 fps | 97.7% |
| ADI Benchmark 8208 | <<locked>> | 80% | 48,109 psi | 75% | 2815 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 48,617 psi | 76% | 2799 fps | 100% |
| Alliant Power Pro 2000-MR | 61 gr | 80% | 41,930 psi | 66% | 2844 fps | 98.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 38,783 psi | 61% | 2677 fps | 99% |
| Alliant Reloder-15 | <<locked>> | 80% | 41,727 psi | 65% | 2743 fps | 98.5% |
| Alliant Reloder-16 | <<locked>> | 84% | 34,258 psi | 54% | 2635 fps | 95.7% |
| Alliant Reloder-17 | 60.1 gr | 80% | 33,605 psi | 53% | 2648 fps | 97.4% |
| Alliant Reloder-23 | <<locked>> | 90% | 29,617 psi | 46% | 2533 fps | 95.4% |
| Alliant Reloder-26 | <<locked>> | 94% | 36,622 psi | 57% | 2782 fps | 95.9% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 45,252 psi | 71% | 2812 fps | 98.7% |
| Bofors RP3 | <<locked>> | 80% | 38,595 psi | 60% | 2684 fps | 99% |
| Bofors RP7 | <<locked>> | 88% | 44,672 psi | 70% | 2759 fps | 95.2% |
| Hodgdon Benchmark | <<locked>> | 80% | 49,719 psi | 78% | 2802 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 47,079 psi | 74% | 2838 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 80% | 52,054 psi | 82% | 2992 fps | 99.8% |
| Hodgdon H380 | <<locked>> | 80% | 39,349 psi | 62% | 2684 fps | 96.7% |
| Hodgdon H414 | <<locked>> | 88% | 41,640 psi | 65% | 2785 fps | 95.1% |
| Hodgdon H4350 | <<locked>> | 90% | 48,399 psi | 76% | 2867 fps | 95.4% |
| Hodgdon H4895 | <<locked>> | 80% | 46,499 psi | 73% | 2822 fps | 99.7% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 29,486 psi | 46% | 2474 fps | 95.7% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 42,496 psi | 67% | 2792 fps | 99.6% |
| Hodgdon Superformance | 71.4 gr | 90% | 44,382 psi | 70% | 2864 fps | 95.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,527 psi | 42% | 1624 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 44,541 psi | 70% | 2772 fps | 99.5% |
| IMR 3031 | <<locked>> | 80% | 46,195 psi | 72% | 2812 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 41,060 psi | 64% | 2690 fps | 98.4% |
| IMR 4166 Enduron | <<locked>> | 80% | 43,468 psi | 68% | 2710 fps | 95.5% |
| IMR 4350 | <<locked>> | 92% | 44,962 psi | 70% | 2789 fps | 95.3% |
| IMR 4451 Enduron | <<locked>> | 86% | 43,584 psi | 68% | 2740 fps | 95.4% |
| IMR 4831 | <<locked>> | 84% | 32,924 psi | 52% | 2575 fps | 95.3% |
| IMR 4895 | <<locked>> | 80% | 42,757 psi | 67% | 2776 fps | 99.1% |
| IMR 8208 XBR | <<locked>> | 80% | 48,109 psi | 75% | 2815 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 45,324 psi | 71% | 2789 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 45,818 psi | 72% | 2740 fps | 99.4% |
| Lovex S062 | <<locked>> | 80% | 41,031 psi | 64% | 2694 fps | 99.5% |
| Lovex S065 | <<locked>> | 84% | 38,174 psi | 60% | 2635 fps | 95.4% |
| Lovex S070 | <<locked>> | 88% | 41,104 psi | 64% | 2713 fps | 95.1% |
| Norma 201 | <<locked>> | 80% | 45,020 psi | 71% | 2759 fps | 99.8% |
| Norma 202 | <<locked>> | 80% | 45,339 psi | 71% | 2766 fps | 100% |
| Norma 203B | <<locked>> | 80% | 41,104 psi | 64% | 2733 fps | 98.8% |
| Norma 204 | <<locked>> | 96% | 51,372 psi | 81% | 2943 fps | 95.5% |
| Norma URP | <<locked>> | 84% | 34,345 psi | 54% | 2621 fps | 95.6% |
| Ramshot Big Game | <<locked>> | 80% | 40,683 psi | 64% | 2746 fps | 98.6% |
| Ramshot Hunter | <<locked>> | 90% | 40,712 psi | 64% | 2776 fps | 95.8% |
| Ramshot TAC | <<locked>> | 80% | 48,109 psi | 75% | 2825 fps | 98.1% |
| Ramshot Wild Boar | <<locked>> | 80% | 47,630 psi | 75% | 2844 fps | 99.6% |
| Ramshot X-Terminator | <<locked>> | 80% | 51,779 psi | 81% | 2864 fps | 99.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,934 psi | 42% | 1663 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 53,838 psi | 84% | 2897 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 39,784 psi | 62% | 2667 fps | 95.1% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 43,976 psi | 69% | 2851 fps | 98.8% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 35,781 psi | 56% | 2717 fps | 99.7% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 33,794 psi | 53% | 2635 fps | 95.1% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 36,216 psi | 57% | 2700 fps | 95.1% |
| Rottweil R 901 | <<locked>> | 80% | 49,052 psi | 77% | 2799 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 42,873 psi | 67% | 2710 fps | 99.7% |
| Rottweil R 903 | <<locked>> | 80% | 36,390 psi | 57% | 2628 fps | 98.3% |
| Rottweil R 907 | <<locked>> | 88% | 44,672 psi | 70% | 2759 fps | 95.2% |
| Shooters World Long Rifle | <<locked>> | 84% | 38,174 psi | 60% | 2635 fps | 95.4% |
| Shooters World Match Rifle | <<locked>> | 80% | 45,324 psi | 71% | 2789 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 41,031 psi | 64% | 2694 fps | 99.5% |
| Shooters World SW4350 | <<locked>> | 88% | 41,104 psi | 64% | 2713 fps | 95.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 37,188 psi | 58% | 2674 fps | 97.8% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 46,340 psi | 73% | 2799 fps | 98.2% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 44,425 psi | 70% | 2776 fps | 99.2% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 46,398 psi | 73% | 2710 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 38,711 psi | 61% | 2572 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 42,728 psi | 67% | 2684 fps | 95.3% |
| Somchem S321 | <<locked>> | 80% | 52,083 psi | 82% | 2897 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 45,919 psi | 72% | 2707 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 46,050 psi | 72% | 2792 fps | 99.4% |
| Somchem S355 | <<locked>> | 80% | 37,057 psi | 58% | 2631 fps | 98.3% |
| Somchem S365 | <<locked>> | 80% | 27,035 psi | 42% | 2457 fps | 96% |
| Somchem S385 | <<locked>> | 98% | 45,397 psi | 71% | 2831 fps | 95.4% |
| Vihtavuori N130 | <<locked>> | 80% | 52,257 psi | 82% | 2769 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 46,760 psi | 73% | 2700 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 42,525 psi | 67% | 2690 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 43,134 psi | 68% | 2700 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 35,375 psi | 55% | 2566 fps | 99% |
| Vihtavuori N160 | <<locked>> | 82% | 33,547 psi | 53% | 2569 fps | 95.2% |
| Vihtavuori N530 | <<locked>> | 80% | 48,254 psi | 76% | 2812 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 41,423 psi | 65% | 2687 fps | 100% |
| Vihtavuori N550 | <<locked>> | 84% | 35,259 psi | 55% | 2625 fps | 95.6% |
| Vihtavuori N555 | <<locked>> | 90% | 32,024 psi | 50% | 2615 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 31,241 psi | 49% | 2487 fps | 96.6% |
| Winchester 748 | <<locked>> | 80% | 47,935 psi | 75% | 2858 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 41,814 psi | 66% | 2792 fps | 95.1% |
| Winchester StaBALL HD | <<locked>> | 94% | 29,863 psi | 47% | 2618 fps | 96.2% |
| Winchester StaBALL Match | <<locked>> | 80% | 44,092 psi | 69% | 2782 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 98 powders for 8 x 68 S loaded with the .323 | 175gr | Sierra Pro-Hunter. ReloadSwiss RS 60 delivers the highest muzzle velocity at 3,123 fps; across all powders the maximum-charge window runs from 1,814 fps to 3,123 fps. Accurate 3100 gives the best case fill at 100 %, and 98 of the 98 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 56–90 %, leaving at least 10 % headroom. The 175.0 gr projectile in 0.323" calls for a 1:16.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, 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. Alliant Power Pro 2000-MR, Hodgdon Superformance, Alliant Reloder-17 rank at the top here: for 8 x 68 S with the .323 | 175gr | Sierra Pro-Hunter 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.