Load Specifications
Load data in caliber 8 x 75 S with .323 | 150gr | Speer Hot-Cor bullet and 100 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: 25.6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 88% | 56,710 psi | 89% | 3074 fps | 100% |
| Accurate 2460 | <<locked>> | 84% | 55,158 psi | 86% | 3094 fps | 100% |
| Accurate 2495 | <<locked>> | 92% | 54,636 psi | 86% | 3087 fps | 100% |
| Accurate 2520 | <<locked>> | 88% | 57,246 psi | 90% | 3163 fps | 100% |
| Accurate 4064 | <<locked>> | 94% | 54,462 psi | 85% | 3133 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 50,314 psi | 79% | 3133 fps | 98% |
| Accurate LT-30 | <<locked>> | 82% | 55,724 psi | 87% | 3012 fps | 100% |
| Accurate LT-32 | <<locked>> | 82% | 56,130 psi | 88% | 3041 fps | 100% |
| ADI AR 2206H | <<locked>> | 90% | 55,767 psi | 87% | 3166 fps | 99.5% |
| ADI AR 2208 | <<locked>> | 96% | 56,869 psi | 89% | 3163 fps | 99.2% |
| ADI AR 2219 | <<locked>> | 82% | 56,855 psi | 89% | 3143 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 88% | 54,984 psi | 86% | 3120 fps | 99.9% |
| Alliant AR-Comp | <<locked>> | 88% | 55,187 psi | 86% | 3107 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 84% | 56,637 psi | 89% | 3241 fps | 99.8% |
| Alliant Power Pro 2000-MR | <<locked>> | 92% | 55,463 psi | 87% | 3284 fps | 99.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 96% | 56,260 psi | 88% | 3182 fps | 99.9% |
| Alliant Reloder-10x | <<locked>> | 84% | 56,289 psi | 88% | 3081 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 94% | 57,029 psi | 89% | 3205 fps | 99.3% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 49,066 psi | 77% | 3136 fps | 98% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 57,508 psi | 90% | 3314 fps | 99.9% |
| Baschieri & Pellagri 106 | <<locked>> | 82% | 55,230 psi | 87% | 3005 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 90% | 55,796 psi | 87% | 3179 fps | 98.9% |
| Bofors RP3 | <<locked>> | 96% | 57,043 psi | 89% | 3202 fps | 99.9% |
| Bofors RP7ᴾ | <<locked>> | 100% | 57,551 psi | 90% | 3156 fps | 95.9% |
| Hodgdon Benchmark | <<locked>> | 88% | 56,797 psi | 89% | 3104 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 88% | 54,172 psi | 85% | 3150 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 86% | 55,985 psi | 88% | 3251 fps | 99.3% |
| Hodgdon H322 | <<locked>> | 84% | 55,579 psi | 87% | 3123 fps | 100% |
| Hodgdon H335 | <<locked>> | 84% | 56,739 psi | 89% | 3146 fps | 100% |
| Hodgdon H380 | <<locked>> | 94% | 54,723 psi | 86% | 3153 fps | 98.2% |
| Hodgdon H414ᴾ | <<locked>> | 100% | 53,592 psi | 84% | 3186 fps | 95.9% |
| Hodgdon H4895 | <<locked>> | 90% | 56,275 psi | 88% | 3179 fps | 99.7% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 45,310 psi | 71% | 3009 fps | 98.5% |
| Hodgdon LEVERevolution | <<locked>> | 92% | 55,288 psi | 87% | 3209 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,969 psi | 55% | 1936 fps | 100% |
| Hodgdon VARGET | <<locked>> | 92% | 57,696 psi | 90% | 3182 fps | 99.8% |
| IMR 3031 | <<locked>> | 90% | 55,854 psi | 88% | 3169 fps | 100% |
| IMR 4064 | <<locked>> | 94% | 56,260 psi | 88% | 3143 fps | 99.3% |
| IMR 4166 Enduron | <<locked>> | 92% | 56,869 psi | 89% | 3120 fps | 96.4% |
| IMR 4198 | <<locked>> | 84% | 56,304 psi | 88% | 3038 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 98% | 55,912 psi | 88% | 3133 fps | 96.1% |
| IMR 4831ᴾ | <<locked>> | 100% | 47,761 psi | 75% | 3068 fps | 97.6% |
| IMR 4895 | <<locked>> | 92% | 54,940 psi | 86% | 3186 fps | 99.5% |
| IMR 8208 XBR | <<locked>> | 88% | 54,984 psi | 86% | 3120 fps | 99.9% |
| Lovex D073.5 | <<locked>> | 84% | 55,172 psi | 86% | 3104 fps | 100% |
| Lovex D073.6 | <<locked>> | 90% | 55,085 psi | 86% | 3143 fps | 100% |
| Lovex S060 | <<locked>> | 90% | 55,709 psi | 87% | 3094 fps | 99.5% |
| Lovex S062 | <<locked>> | 94% | 55,753 psi | 87% | 3143 fps | 99.9% |
| Lovex S065ᴾ | <<locked>> | 100% | 54,853 psi | 86% | 3123 fps | 97.4% |
| Lovex S070ᴾ | <<locked>> | 100% | 52,286 psi | 82% | 3097 fps | 95.8% |
| Norma 201 | <<locked>> | 90% | 54,433 psi | 85% | 3110 fps | 99.9% |
| Norma 202 | <<locked>> | 90% | 55,013 psi | 86% | 3120 fps | 100% |
| Norma 203B | <<locked>> | 94% | 56,173 psi | 88% | 3192 fps | 99.5% |
| Norma URPᴾ | <<locked>> | 100% | 49,763 psi | 78% | 3123 fps | 97.8% |
| Ramshot Big Game | <<locked>> | 94% | 57,072 psi | 89% | 3222 fps | 99.5% |
| Ramshot TAC | <<locked>> | 88% | 55,593 psi | 87% | 3130 fps | 97.7% |
| Ramshot Wild Boar | <<locked>> | 88% | 54,911 psi | 86% | 3153 fps | 99.4% |
| Ramshot X-Terminator | <<locked>> | 86% | 56,246 psi | 88% | 3120 fps | 99.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,201 psi | 55% | 1978 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 54,433 psi | 85% | 3104 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 94% | 55,230 psi | 87% | 3130 fps | 96.8% |
| ReloadSwiss RS 52 | <<locked>> | 92% | 57,377 psi | 90% | 3278 fps | 99.4% |
| ReloadSwiss RS 60 | <<locked>> | 98% | 57,246 psi | 90% | 3317 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 50,082 psi | 78% | 3153 fps | 97.7% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 50,749 psi | 80% | 3176 fps | 97.2% |
| Rottweil R 901 | <<locked>> | 88% | 55,535 psi | 87% | 3100 fps | 100% |
| Rottweil R 902 | <<locked>> | 92% | 54,911 psi | 86% | 3107 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 98% | 56,681 psi | 89% | 3186 fps | 99.8% |
| Rottweil R 907ᴾ | <<locked>> | 100% | 57,551 psi | 90% | 3156 fps | 95.9% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 54,853 psi | 86% | 3123 fps | 97.4% |
| Shooters World Match Rifle | <<locked>> | 90% | 55,085 psi | 86% | 3143 fps | 100% |
| Shooters World Precision | <<locked>> | 94% | 55,753 psi | 87% | 3143 fps | 99.9% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 52,286 psi | 82% | 3097 fps | 95.8% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 54,186 psi | 85% | 3068 fps | 99.7% |
| SNPE Vectan SP 10 | <<locked>> | 82% | 57,276 psi | 90% | 3153 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 96% | 55,114 psi | 86% | 3199 fps | 99.4% |
| SNPE Vectan SP 3 | <<locked>> | 84% | 57,188 psi | 90% | 3104 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 90% | 57,377 psi | 90% | 3159 fps | 98.4% |
| SNPE Vectan SP 9 | <<locked>> | 92% | 57,696 psi | 90% | 3189 fps | 99.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 90% | 56,275 psi | 88% | 3054 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 96% | 56,391 psi | 88% | 3048 fps | 100% |
| SNPE Vectan Tubal 7000ᴾ | <<locked>> | 100% | 55,651 psi | 87% | 3074 fps | 96.1% |
| Somchem S321 | <<locked>> | 86% | 56,318 psi | 88% | 3156 fps | 100% |
| Somchem S335 | <<locked>> | 90% | 55,506 psi | 87% | 3051 fps | 100% |
| Somchem S341 | <<locked>> | 90% | 57,029 psi | 89% | 3156 fps | 99.5% |
| Somchem S355 | <<locked>> | 98% | 57,188 psi | 90% | 3189 fps | 99.8% |
| Somchem S365ᴾ | <<locked>> | 100% | 44,411 psi | 70% | 3068 fps | 99.4% |
| Vihtavuori N130 | <<locked>> | 86% | 56,188 psi | 88% | 3025 fps | 100% |
| Vihtavuori N133 | <<locked>> | 90% | 56,275 psi | 88% | 3038 fps | 100% |
| Vihtavuori N135 | <<locked>> | 94% | 57,609 psi | 90% | 3123 fps | 100% |
| Vihtavuori N140 | <<locked>> | 92% | 55,434 psi | 87% | 3094 fps | 100% |
| Vihtavuori N150 | <<locked>> | 98% | 55,158 psi | 86% | 3110 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 52,504 psi | 82% | 3123 fps | 98.1% |
| Vihtavuori N530 | <<locked>> | 88% | 55,579 psi | 87% | 3123 fps | 99.9% |
| Vihtavuori N540 | <<locked>> | 94% | 57,319 psi | 90% | 3140 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 51,474 psi | 81% | 3127 fps | 97.8% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 53,664 psi | 84% | 3110 fps | 99.7% |
| Winchester 748 | <<locked>> | 88% | 55,056 psi | 86% | 3169 fps | 100% |
| Winchester 760ᴾ | <<locked>> | 100% | 53,838 psi | 84% | 3189 fps | 96% |
| Winchester StaBALL Match | <<locked>> | 90% | 54,056 psi | 85% | 3143 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% | 44,222 psi | 69% | 2874 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 48,341 psi | 76% | 2986 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 36,753 psi | 58% | 2772 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 43,352 psi | 68% | 2930 fps | 99.7% |
| Accurate 4064 | <<locked>> | 80% | 34,751 psi | 54% | 2753 fps | 99% |
| Accurate 4350 | <<locked>> | 94% | 40,611 psi | 64% | 2940 fps | 95.6% |
| Accurate LT-30 | <<locked>> | 80% | 52,315 psi | 82% | 2963 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 52,707 psi | 83% | 2986 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 40,553 psi | 64% | 2874 fps | 96.9% |
| ADI AR 2208 | <<locked>> | 84% | 39,160 psi | 61% | 2822 fps | 95.7% |
| ADI AR 2219 | <<locked>> | 80% | 53,258 psi | 83% | 3091 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 80% | 42,569 psi | 67% | 2890 fps | 98.5% |
| Alliant AR-Comp | <<locked>> | 80% | 42,119 psi | 66% | 2900 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 49,501 psi | 78% | 3114 fps | 99.1% |
| Alliant Power Pro 2000-MR | 61.8 gr | 82% | 39,218 psi | 61% | 2940 fps | 95.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 33,852 psi | 53% | 2726 fps | 95.8% |
| Alliant Reloder-10x | <<locked>> | 80% | 49,719 psi | 78% | 2979 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 38,827 psi | 61% | 2851 fps | 95.8% |
| Alliant Reloder-16 | <<locked>> | 94% | 40,857 psi | 64% | 2956 fps | 95.7% |
| Alliant Reloder-17 | <<locked>> | 86% | 35,795 psi | 56% | 2858 fps | 95.7% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 51,590 psi | 81% | 2949 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 39,581 psi | 62% | 2867 fps | 95.4% |
| Bofors RP3 | <<locked>> | 80% | 33,170 psi | 52% | 2723 fps | 95.7% |
| Bofors RP7 | <<locked>> | 98% | 54,041 psi | 85% | 3097 fps | 95.2% |
| Hodgdon Benchmark | <<locked>> | 80% | 44,657 psi | 70% | 2894 fps | 99.2% |
| Hodgdon BL-C2 | <<locked>> | 80% | 41,075 psi | 64% | 2904 fps | 98.7% |
| Hodgdon CFE223 | <<locked>> | 80% | 45,034 psi | 71% | 3051 fps | 97.5% |
| Hodgdon H322 | <<locked>> | 80% | 48,762 psi | 76% | 3015 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 49,574 psi | 78% | 3035 fps | 100% |
| Hodgdon H380 | <<locked>> | 86% | 41,916 psi | 66% | 2907 fps | 95.3% |
| Hodgdon H414 | <<locked>> | 98% | 50,270 psi | 79% | 3127 fps | 95.1% |
| Hodgdon H4895 | <<locked>> | 80% | 40,901 psi | 64% | 2887 fps | 97.6% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 35,128 psi | 55% | 2779 fps | 95.6% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 36,912 psi | 58% | 2844 fps | 96.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,933 psi | 41% | 1732 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 39,276 psi | 62% | 2835 fps | 97.1% |
| IMR 3031 | <<locked>> | 80% | 40,016 psi | 63% | 2897 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 36,289 psi | 57% | 2746 fps | 95% |
| IMR 4166 Enduron | <<locked>> | 90% | 53,229 psi | 83% | 3058 fps | 95.6% |
| IMR 4198 | <<locked>> | 80% | 50,125 psi | 79% | 2946 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 96% | 52,620 psi | 82% | 3077 fps | 95.4% |
| IMR 4831 | <<locked>> | 94% | 39,189 psi | 61% | 2890 fps | 95.2% |
| IMR 4895 | <<locked>> | 80% | 37,275 psi | 58% | 2828 fps | 96% |
| IMR 8208 XBR | <<locked>> | 80% | 42,569 psi | 67% | 2890 fps | 98.5% |
| Lovex D073.5 | <<locked>> | 80% | 48,196 psi | 76% | 2989 fps | 99.7% |
| Lovex D073.6 | <<locked>> | 80% | 39,363 psi | 62% | 2854 fps | 99.1% |
| Lovex S060 | <<locked>> | 80% | 41,089 psi | 64% | 2815 fps | 97.1% |
| Lovex S062 | <<locked>> | 80% | 36,013 psi | 56% | 2753 fps | 97% |
| Lovex S065 | <<locked>> | 94% | 45,701 psi | 72% | 2956 fps | 95.4% |
| Lovex S070 | <<locked>> | 98% | 49,110 psi | 77% | 3041 fps | 95% |
| Norma 201 | <<locked>> | 80% | 39,798 psi | 62% | 2828 fps | 98% |
| Norma 202 | <<locked>> | 80% | 39,929 psi | 63% | 2848 fps | 99.6% |
| Norma 203B | <<locked>> | 80% | 35,810 psi | 56% | 2782 fps | 95.4% |
| Norma URP | <<locked>> | 94% | 40,901 psi | 64% | 2943 fps | 95.5% |
| Ramshot Big Game | <<locked>> | 82% | 37,782 psi | 59% | 2848 fps | 95.9% |
| Ramshot TAC | <<locked>> | 82% | 45,614 psi | 71% | 2946 fps | 95.6% |
| Ramshot Wild Boar | <<locked>> | 80% | 41,814 psi | 66% | 2907 fps | 97.2% |
| Ramshot X-Terminator | <<locked>> | 80% | 46,122 psi | 72% | 2940 fps | 98% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,237 psi | 41% | 1775 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 47,790 psi | 75% | 2989 fps | 99.8% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 48,530 psi | 76% | 3012 fps | 95.3% |
| ReloadSwiss RS 52 | 58.5 gr | 80% | 37,797 psi | 59% | 2897 fps | 95.4% |
| ReloadSwiss RS 60 | 59.4 gr | 80% | 31,154 psi | 49% | 2736 fps | 96.3% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 40,524 psi | 64% | 2959 fps | 95.1% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 44,266 psi | 69% | 3041 fps | 95.3% |
| Rottweil R 901 | <<locked>> | 80% | 43,642 psi | 68% | 2890 fps | 99.8% |
| Rottweil R 902 | <<locked>> | 80% | 37,869 psi | 59% | 2776 fps | 97.5% |
| Rottweil R 903 | <<locked>> | 82% | 33,388 psi | 52% | 2720 fps | 95.4% |
| Rottweil R 907 | <<locked>> | 98% | 54,041 psi | 85% | 3097 fps | 95.2% |
| Shooters World Long Rifle | <<locked>> | 94% | 45,701 psi | 72% | 2956 fps | 95.4% |
| Shooters World Match Rifle | <<locked>> | 80% | 39,363 psi | 62% | 2854 fps | 99.1% |
| Shooters World Precision | <<locked>> | 80% | 36,013 psi | 56% | 2753 fps | 97% |
| Shooters World SW4350 | <<locked>> | 98% | 49,110 psi | 77% | 3041 fps | 95% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 50,604 psi | 79% | 3009 fps | 99.4% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 53,635 psi | 84% | 3097 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 36,956 psi | 58% | 2835 fps | 95.6% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 50,618 psi | 79% | 3005 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 43,671 psi | 68% | 2913 fps | 95.7% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 39,204 psi | 61% | 2838 fps | 96.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 41,423 psi | 65% | 2799 fps | 99.7% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 34,185 psi | 54% | 2648 fps | 99.3% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 52,098 psi | 82% | 3015 fps | 95.4% |
| Somchem S321 | <<locked>> | 80% | 45,919 psi | 72% | 2976 fps | 99.3% |
| Somchem S335 | <<locked>> | 80% | 40,915 psi | 64% | 2799 fps | 99.9% |
| Somchem S341 | <<locked>> | 80% | 40,306 psi | 63% | 2851 fps | 96.7% |
| Somchem S355 | <<locked>> | 82% | 34,476 psi | 54% | 2736 fps | 95.5% |
| Somchem S365 | <<locked>> | 88% | 30,182 psi | 47% | 2703 fps | 95% |
| Vihtavuori N130 | <<locked>> | 80% | 46,876 psi | 73% | 2881 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 41,597 psi | 65% | 2799 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 36,999 psi | 58% | 2776 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 37,724 psi | 59% | 2772 fps | 99.5% |
| Vihtavuori N150 | <<locked>> | 80% | 30,618 psi | 48% | 2608 fps | 95.6% |
| Vihtavuori N160 | <<locked>> | 92% | 40,248 psi | 63% | 2887 fps | 95.2% |
| Vihtavuori N530 | <<locked>> | 80% | 42,525 psi | 67% | 2887 fps | 98.6% |
| Vihtavuori N540 | <<locked>> | 80% | 36,463 psi | 57% | 2759 fps | 99% |
| Vihtavuori N550 | <<locked>> | 94% | 42,293 psi | 66% | 2949 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 33,504 psi | 53% | 2687 fps | 95% |
| Winchester 748 | <<locked>> | 80% | 41,916 psi | 66% | 2933 fps | 99.1% |
| Winchester 760 | <<locked>> | 98% | 50,488 psi | 79% | 3130 fps | 95.2% |
| Winchester StaBALL Match | <<locked>> | 80% | 38,406 psi | 60% | 2838 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 111 powders for 8 x 75 S loaded with the .323 | 150gr | Speer Hot-Cor. ReloadSwiss RS 60 delivers the highest muzzle velocity at 3,317 fps; across all powders the maximum-charge window runs from 1,936 fps to 3,317 fps. Accurate 4350 gives the best case fill at 100 %, and 111 of the 111 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 49–90 %, leaving at least 10 % headroom. The 150.0 gr projectile in 0.323" calls for a 1:6.0 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 75 S with the .323 | 150gr | Speer Hot-Cor they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Alliant Reloder-26, Hodgdon H4350, IMR 4350 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.