Load Specifications
Load data in caliber 8 x 68 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 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>> | 86% | 55,680 psi | 87% | 3084 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 54,230 psi | 85% | 3110 fps | 100% |
| Accurate 2495 | <<locked>> | 88% | 56,724 psi | 89% | 3169 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 54,288 psi | 85% | 3156 fps | 100% |
| Accurate 4064 | <<locked>> | 94% | 57,522 psi | 90% | 3202 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 53,751 psi | 84% | 3222 fps | 98.9% |
| ADI AR 2206H | <<locked>> | 88% | 54,940 psi | 86% | 3186 fps | 99.6% |
| ADI AR 2208 | <<locked>> | 94% | 55,912 psi | 88% | 3182 fps | 99.4% |
| ADI Benchmark 8208 | <<locked>> | 88% | 57,464 psi | 90% | 3189 fps | 100% |
| Alliant AR-Comp | <<locked>> | 86% | 54,331 psi | 85% | 3117 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 55,521 psi | 87% | 3255 fps | 99.9% |
| Alliant Power Pro 2000-MR | <<locked>> | 90% | 54,462 psi | 85% | 3304 fps | 99.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 55,724 psi | 87% | 3205 fps | 99.9% |
| Alliant Reloder-10x | <<locked>> | 82% | 55,259 psi | 87% | 3094 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 92% | 56,275 psi | 88% | 3225 fps | 99.5% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 51,692 psi | 81% | 3222 fps | 98.9% |
| Alliant Reloder-17 | <<locked>> | 98% | 56,550 psi | 89% | 3330 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 36,970 psi | 58% | 2917 fps | 96.7% |
| Baschieri & Pellagri 106 | <<locked>> | 82% | 57,232 psi | 90% | 3061 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 54,607 psi | 86% | 3192 fps | 99% |
| Bofors RP3 | <<locked>> | 94% | 56,434 psi | 88% | 3222 fps | 100% |
| Bofors RP7 | <<locked>> | 98% | 56,565 psi | 89% | 3176 fps | 96.3% |
| Hodgdon Benchmark | <<locked>> | 86% | 55,738 psi | 87% | 3120 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 88% | 56,797 psi | 89% | 3222 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 84% | 54,911 psi | 86% | 3264 fps | 99.4% |
| Hodgdon H322 | <<locked>> | 86% | 57,276 psi | 90% | 3176 fps | 100% |
| Hodgdon H380 | <<locked>> | 94% | 57,479 psi | 90% | 3232 fps | 98.9% |
| Hodgdon H414 | <<locked>> | 96% | 54,882 psi | 86% | 3241 fps | 96.8% |
| Hodgdon H4895 | <<locked>> | 88% | 55,448 psi | 87% | 3199 fps | 99.8% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 47,819 psi | 75% | 3087 fps | 99.2% |
| Hodgdon LEVERevolution | <<locked>> | 92% | 54,578 psi | 86% | 3225 fps | 99.9% |
| Hodgdon Superformance | <<locked>> | 98% | 54,346 psi | 85% | 3248 fps | 96.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,128 psi | 55% | 1965 fps | 100% |
| Hodgdon VARGET | <<locked>> | 92% | 55,419 psi | 87% | 3179 fps | 99.8% |
| IMR 3031 | <<locked>> | 92% | 56,884 psi | 89% | 3212 fps | 100% |
| IMR 4064 | <<locked>> | 94% | 54,273 psi | 85% | 3143 fps | 99.3% |
| IMR 4166 Enduron | <<locked>> | 96% | 57,508 psi | 90% | 3166 fps | 97.1% |
| IMR 4198 | <<locked>> | 82% | 55,143 psi | 86% | 3048 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 96% | 55,042 psi | 86% | 3156 fps | 96.5% |
| IMR 4831ᴾ | <<locked>> | 100% | 44,991 psi | 71% | 3041 fps | 97.4% |
| IMR 4895 | <<locked>> | 92% | 57,696 psi | 90% | 3261 fps | 99.8% |
| IMR 8208 XBR | <<locked>> | 88% | 57,464 psi | 90% | 3189 fps | 100% |
| Lovex D073.5 | <<locked>> | 82% | 53,954 psi | 85% | 3117 fps | 100% |
| Lovex D073.6 | <<locked>> | 88% | 54,549 psi | 85% | 3163 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 54,592 psi | 86% | 3110 fps | 99.6% |
| Lovex S062 | <<locked>> | 92% | 55,100 psi | 86% | 3163 fps | 100% |
| Lovex S065 | <<locked>> | 98% | 54,273 psi | 85% | 3146 fps | 97.8% |
| Lovex S070ᴾ | <<locked>> | 100% | 55,245 psi | 87% | 3182 fps | 97% |
| Norma 201 | <<locked>> | 90% | 57,000 psi | 89% | 3182 fps | 100% |
| Norma 202 | <<locked>> | 90% | 57,638 psi | 90% | 3186 fps | 100% |
| Norma 203B | <<locked>> | 92% | 55,434 psi | 87% | 3212 fps | 99.7% |
| Norma URPᴾ | <<locked>> | 100% | 52,910 psi | 83% | 3209 fps | 98.7% |
| Ramshot Big Game | <<locked>> | 92% | 56,231 psi | 88% | 3238 fps | 99.7% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 51,880 psi | 81% | 3196 fps | 97.1% |
| Ramshot TAC | <<locked>> | 86% | 54,404 psi | 85% | 3146 fps | 98% |
| Ramshot Wild Boar | <<locked>> | 88% | 57,435 psi | 90% | 3228 fps | 99.8% |
| Ramshot X-Terminator | <<locked>> | 84% | 54,984 psi | 86% | 3133 fps | 99.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,563 psi | 56% | 2011 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 56,869 psi | 89% | 3173 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 54,389 psi | 85% | 3150 fps | 97.1% |
| ReloadSwiss RS 52 | <<locked>> | 90% | 56,724 psi | 89% | 3301 fps | 99.5% |
| ReloadSwiss RS 60 | <<locked>> | 96% | 56,463 psi | 88% | 3337 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 53,316 psi | 84% | 3238 fps | 98.6% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 53,592 psi | 84% | 3268 fps | 98.3% |
| Rottweil R 901 | <<locked>> | 86% | 54,534 psi | 85% | 3114 fps | 100% |
| Rottweil R 902 | <<locked>> | 92% | 57,493 psi | 90% | 3179 fps | 100% |
| Rottweil R 903 | <<locked>> | 96% | 56,014 psi | 88% | 3209 fps | 99.9% |
| Rottweil R 907 | <<locked>> | 98% | 56,565 psi | 89% | 3176 fps | 96.3% |
| Shooters World Long Rifle | <<locked>> | 98% | 54,273 psi | 85% | 3146 fps | 97.8% |
| Shooters World Match Rifle | <<locked>> | 88% | 54,549 psi | 85% | 3163 fps | 100% |
| Shooters World Precision | <<locked>> | 92% | 55,100 psi | 86% | 3163 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 55,245 psi | 87% | 3182 fps | 97% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 56,724 psi | 89% | 3140 fps | 99.9% |
| SNPE Vectan SP 11 | <<locked>> | 94% | 54,375 psi | 85% | 3215 fps | 99.6% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 56,072 psi | 88% | 3117 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 88% | 56,304 psi | 88% | 3179 fps | 98.7% |
| SNPE Vectan SP 9 | <<locked>> | 90% | 56,782 psi | 89% | 3209 fps | 99.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 55,216 psi | 87% | 3068 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 55,259 psi | 87% | 3061 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 54,752 psi | 86% | 3094 fps | 96.5% |
| Somchem S321 | <<locked>> | 84% | 55,114 psi | 86% | 3166 fps | 100% |
| Somchem S335 | <<locked>> | 88% | 54,433 psi | 85% | 3064 fps | 100% |
| Somchem S341 | <<locked>> | 88% | 55,811 psi | 87% | 3169 fps | 99.6% |
| Somchem S355 | <<locked>> | 96% | 56,521 psi | 89% | 3209 fps | 99.9% |
| Somchem S365ᴾ | <<locked>> | 100% | 47,282 psi | 74% | 3153 fps | 99.9% |
| Unknown powder | <<locked>> | 98% | 54,027 psi | 85% | 3219 fps | 98.3% |
| Vihtavuori N130 | <<locked>> | 84% | 54,940 psi | 86% | 3035 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 55,317 psi | 87% | 3054 fps | 100% |
| Vihtavuori N135 | <<locked>> | 92% | 56,884 psi | 89% | 3140 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 54,534 psi | 85% | 3107 fps | 100% |
| Vihtavuori N150 | <<locked>> | 96% | 54,462 psi | 85% | 3130 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 55,550 psi | 87% | 3209 fps | 98.9% |
| Vihtavuori N530 | <<locked>> | 86% | 54,462 psi | 85% | 3136 fps | 100% |
| Vihtavuori N540 | <<locked>> | 92% | 56,333 psi | 88% | 3156 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 54,621 psi | 86% | 3212 fps | 98.7% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 39,769 psi | 62% | 2999 fps | 96.7% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 56,405 psi | 88% | 3189 fps | 100% |
| Winchester 748 | <<locked>> | 84% | 54,708 psi | 86% | 3196 fps | 100% |
| Winchester 760 | <<locked>> | 96% | 54,882 psi | 86% | 3241 fps | 96.8% |
| Winchester StaBALL Match | <<locked>> | 82% | 54,433 psi | 85% | 3179 fps | 99.8% |
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% | 46,267 psi | 73% | 2936 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 50,618 psi | 79% | 3051 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 43,410 psi | 68% | 2953 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 44,222 psi | 69% | 2986 fps | 99.9% |
| Accurate 4064 | <<locked>> | 80% | 36,608 psi | 57% | 2822 fps | 99.6% |
| Accurate 4350 | <<locked>> | 90% | 37,652 psi | 59% | 2900 fps | 95.2% |
| ADI AR 2206H | <<locked>> | 80% | 42,453 psi | 67% | 2946 fps | 97.8% |
| ADI AR 2208 | <<locked>> | 80% | 36,201 psi | 57% | 2779 fps | 95.2% |
| ADI Benchmark 8208 | <<locked>> | 80% | 44,498 psi | 70% | 2963 fps | 99.1% |
| Alliant AR-Comp | <<locked>> | 80% | 44,396 psi | 70% | 2963 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 51,924 psi | 81% | 3189 fps | 99.6% |
| Alliant Power Pro 2000-MR | 63.2 gr | 80% | 38,537 psi | 60% | 2956 fps | 95.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 35,650 psi | 56% | 2802 fps | 96.9% |
| Alliant Reloder-10x | <<locked>> | 80% | 51,996 psi | 81% | 3045 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 38,247 psi | 60% | 2867 fps | 96.1% |
| Alliant Reloder-16 | <<locked>> | 90% | 37,898 psi | 59% | 2917 fps | 95.2% |
| Alliant Reloder-17 | 63.8 gr | 82% | 32,924 psi | 52% | 2808 fps | 95.1% |
| Alliant Reloder-23 | <<locked>> | 98% | 34,650 psi | 54% | 2854 fps | 95.8% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 53,650 psi | 84% | 3012 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 41,597 psi | 65% | 2943 fps | 96.5% |
| Bofors RP3 | <<locked>> | 80% | 35,157 psi | 55% | 2799 fps | 96.9% |
| Bofors RP7 | <<locked>> | 96% | 53,214 psi | 83% | 3120 fps | 95.6% |
| Hodgdon Benchmark | <<locked>> | 80% | 46,325 psi | 73% | 2956 fps | 99.6% |
| Hodgdon BL-C2 | <<locked>> | 80% | 43,250 psi | 68% | 2979 fps | 99.3% |
| Hodgdon CFE223 | <<locked>> | 80% | 47,630 psi | 75% | 3133 fps | 98.5% |
| Hodgdon H322 | <<locked>> | 80% | 47,253 psi | 74% | 3015 fps | 100% |
| Hodgdon H380 | <<locked>> | 84% | 41,365 psi | 65% | 2927 fps | 95.7% |
| Hodgdon H414 | <<locked>> | 92% | 47,863 psi | 75% | 3114 fps | 95.1% |
| Hodgdon H4895 | <<locked>> | 80% | 42,844 psi | 67% | 2959 fps | 98.4% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 32,532 psi | 51% | 2740 fps | 95.1% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 36,492 psi | 57% | 2864 fps | 97.3% |
| Hodgdon Superformance | <<locked>> | 96% | 50,401 psi | 79% | 3176 fps | 95.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,107 psi | 41% | 1759 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 38,145 psi | 60% | 2838 fps | 97.2% |
| IMR 3031 | <<locked>> | 80% | 38,754 psi | 61% | 2894 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 35,317 psi | 55% | 2753 fps | 95.2% |
| IMR 4166 Enduron | <<locked>> | 90% | 47,964 psi | 75% | 2995 fps | 95% |
| IMR 4198 | <<locked>> | 80% | 51,996 psi | 81% | 3002 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 92% | 48,718 psi | 76% | 3041 fps | 95.1% |
| IMR 4831 | <<locked>> | 94% | 37,231 psi | 58% | 2874 fps | 95.1% |
| IMR 4895 | <<locked>> | 80% | 39,175 psi | 61% | 2904 fps | 97.1% |
| IMR 8208 XBR | <<locked>> | 80% | 44,498 psi | 70% | 2963 fps | 99.1% |
| Lovex D073.5 | <<locked>> | 80% | 50,560 psi | 79% | 3061 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 41,379 psi | 65% | 2927 fps | 99.6% |
| Lovex S060 | <<locked>> | 80% | 42,728 psi | 67% | 2884 fps | 97.9% |
| Lovex S062 | <<locked>> | 80% | 37,753 psi | 59% | 2825 fps | 97.9% |
| Lovex S065 | <<locked>> | 90% | 42,424 psi | 66% | 2920 fps | 95% |
| Lovex S070 | <<locked>> | 96% | 48,573 psi | 76% | 3064 fps | 95.5% |
| Norma 201 | <<locked>> | 80% | 41,582 psi | 65% | 2900 fps | 98.7% |
| Norma 202 | <<locked>> | 80% | 41,930 psi | 66% | 2913 fps | 99.9% |
| Norma 203B | <<locked>> | 80% | 37,637 psi | 59% | 2854 fps | 96.6% |
| Norma URP | <<locked>> | 90% | 37,956 psi | 59% | 2904 fps | 95.1% |
| Ramshot Big Game | <<locked>> | 80% | 37,159 psi | 58% | 2864 fps | 96.2% |
| Ramshot Hunter | <<locked>> | 96% | 45,382 psi | 71% | 3068 fps | 95.4% |
| Ramshot TAC | <<locked>> | 80% | 44,599 psi | 70% | 2959 fps | 95.9% |
| Ramshot Wild Boar | <<locked>> | 80% | 43,918 psi | 69% | 2982 fps | 98.1% |
| Ramshot X-Terminator | <<locked>> | 80% | 48,196 psi | 76% | 3015 fps | 98.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,411 psi | 41% | 1801 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 49,995 psi | 78% | 3061 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 47,674 psi | 75% | 3028 fps | 95.7% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 39,958 psi | 63% | 2976 fps | 96.6% |
| ReloadSwiss RS 60 | 62.2 gr | 80% | 32,721 psi | 51% | 2818 fps | 97.7% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 40,248 psi | 63% | 2982 fps | 95.7% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 43,627 psi | 68% | 3061 fps | 95.8% |
| Rottweil R 901 | <<locked>> | 80% | 45,600 psi | 71% | 2959 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 39,624 psi | 62% | 2848 fps | 98.3% |
| Rottweil R 903 | <<locked>> | 80% | 33,040 psi | 52% | 2736 fps | 95.8% |
| Rottweil R 907 | <<locked>> | 96% | 53,214 psi | 83% | 3120 fps | 95.6% |
| Shooters World Long Rifle | <<locked>> | 90% | 42,424 psi | 66% | 2920 fps | 95% |
| Shooters World Match Rifle | <<locked>> | 80% | 41,379 psi | 65% | 2927 fps | 99.6% |
| Shooters World Precision | <<locked>> | 80% | 37,753 psi | 59% | 2825 fps | 97.9% |
| Shooters World SW4350 | <<locked>> | 96% | 48,573 psi | 76% | 3064 fps | 95.5% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 52,895 psi | 83% | 3081 fps | 99.8% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 34,113 psi | 53% | 2789 fps | 95.1% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 52,678 psi | 83% | 3064 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 42,859 psi | 67% | 2930 fps | 96% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 41,118 psi | 64% | 2913 fps | 97.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 43,062 psi | 67% | 2861 fps | 99.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 35,679 psi | 56% | 2707 fps | 99.7% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 48,124 psi | 75% | 2979 fps | 95% |
| Somchem S321 | <<locked>> | 80% | 48,124 psi | 75% | 3048 fps | 99.7% |
| Somchem S335 | <<locked>> | 80% | 42,612 psi | 67% | 2861 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 42,337 psi | 66% | 2923 fps | 97.7% |
| Somchem S355 | <<locked>> | 80% | 33,910 psi | 53% | 2746 fps | 95.8% |
| Somchem S365 | <<locked>> | 86% | 29,762 psi | 47% | 2720 fps | 95.4% |
| Unknown powder | <<locked>> | 90% | 41,394 psi | 65% | 2969 fps | 95.4% |
| Vihtavuori N130 | <<locked>> | 80% | 48,689 psi | 76% | 2936 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 43,294 psi | 68% | 2858 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 38,856 psi | 61% | 2838 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 39,653 psi | 62% | 2841 fps | 99.8% |
| Vihtavuori N150 | <<locked>> | 80% | 32,285 psi | 51% | 2680 fps | 96.8% |
| Vihtavuori N160 | <<locked>> | 90% | 39,740 psi | 62% | 2907 fps | 95.6% |
| Vihtavuori N530 | <<locked>> | 80% | 44,643 psi | 70% | 2959 fps | 99.2% |
| Vihtavuori N540 | <<locked>> | 80% | 38,159 psi | 60% | 2825 fps | 99.5% |
| Vihtavuori N550 | <<locked>> | 90% | 39,218 psi | 61% | 2907 fps | 95.2% |
| Vihtavuori N555 | <<locked>> | 98% | 37,347 psi | 59% | 2943 fps | 95.9% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 32,880 psi | 52% | 2703 fps | 95.4% |
| Winchester 748 | <<locked>> | 80% | 47,500 psi | 74% | 3071 fps | 99.9% |
| Winchester 760 | <<locked>> | 92% | 47,863 psi | 75% | 3114 fps | 95.1% |
| Winchester StaBALL Match | <<locked>> | 80% | 50,604 psi | 79% | 3114 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 114 powders for 8 x 68 S loaded with the .323 | 150gr | Speer Hot-Cor. ReloadSwiss RS 60 delivers the highest muzzle velocity at 3,337 fps; across all powders the maximum-charge window runs from 1,965 fps to 3,337 fps. Accurate 3100 gives the best case fill at 100 %, and 114 of the 114 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 52–90 %, 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 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, ReloadSwiss RS 60, Alliant Reloder-17 rank at the top here: for 8 x 68 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, 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.