Load Specifications
Load data in caliber 8 x 57 PCC with .323 | 145gr | Brenneke TIG nature 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, 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: 23.62"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 86% | 55,941 psi | 88% | 3127 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 54,346 psi | 85% | 3146 fps | 100% |
| Accurate 2495 | <<locked>> | 92% | 57,711 psi | 90% | 3189 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 56,710 psi | 89% | 3215 fps | 100% |
| Accurate 4064 | <<locked>> | 92% | 53,969 psi | 85% | 3182 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 54,433 psi | 85% | 3258 fps | 98.7% |
| ADI AR 2206H | <<locked>> | 88% | 55,332 psi | 87% | 3225 fps | 99.5% |
| ADI AR 2208 | <<locked>> | 94% | 56,405 psi | 88% | 3219 fps | 99.3% |
| ADI Benchmark 8208 | <<locked>> | 86% | 54,302 psi | 85% | 3173 fps | 99.9% |
| Alliant AR-Comp | <<locked>> | 86% | 54,810 psi | 86% | 3156 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 56,043 psi | 88% | 3294 fps | 99.8% |
| Alliant Power Pro 2000-MR | <<locked>> | 90% | 55,129 psi | 86% | 3343 fps | 99.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 56,260 psi | 88% | 3245 fps | 99.9% |
| Alliant Reloder-10x | <<locked>> | 82% | 55,303 psi | 87% | 3133 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 92% | 56,869 psi | 89% | 3264 fps | 99.4% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 52,373 psi | 82% | 3261 fps | 98.7% |
| Alliant Reloder-17 | <<locked>> | 98% | 57,479 psi | 90% | 3369 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 37,144 psi | 58% | 2940 fps | 96.3% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 55,347 psi | 87% | 3235 fps | 98.9% |
| Bofors RP3 | <<locked>> | 94% | 56,985 psi | 89% | 3261 fps | 99.9% |
| Bofors RP7 | <<locked>> | 98% | 57,217 psi | 90% | 3219 fps | 96.1% |
| Hodgdon Benchmark | <<locked>> | 86% | 56,188 psi | 88% | 3163 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 88% | 57,537 psi | 90% | 3261 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 84% | 55,767 psi | 87% | 3307 fps | 99.3% |
| Hodgdon H322 | <<locked>> | 82% | 54,824 psi | 86% | 3176 fps | 100% |
| Hodgdon H335 | <<locked>> | 82% | 56,144 psi | 88% | 3199 fps | 100% |
| Hodgdon H380 | <<locked>> | 92% | 54,433 psi | 85% | 3212 fps | 98.3% |
| Hodgdon H414ᴾ | <<locked>> | 100% | 57,740 psi | 90% | 3317 fps | 97% |
| Hodgdon H4895 | <<locked>> | 88% | 55,869 psi | 88% | 3235 fps | 99.8% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 48,486 psi | 76% | 3127 fps | 99.1% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 55,376 psi | 87% | 3268 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,041 psi | 55% | 2005 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 57,319 psi | 90% | 3241 fps | 99.8% |
| IMR 3031 | <<locked>> | 88% | 55,434 psi | 87% | 3222 fps | 100% |
| IMR 4064 | <<locked>> | 92% | 55,869 psi | 88% | 3205 fps | 99.3% |
| IMR 4166 Enduron | <<locked>> | 90% | 56,043 psi | 88% | 3176 fps | 96.5% |
| IMR 4198 | <<locked>> | 82% | 55,448 psi | 87% | 3094 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 96% | 55,622 psi | 87% | 3196 fps | 96.3% |
| IMR 4831ᴾ | <<locked>> | 100% | 51,271 psi | 80% | 3186 fps | 98.3% |
| IMR 4895 | <<locked>> | 90% | 54,563 psi | 86% | 3241 fps | 99.5% |
| IMR 8208 XBR | <<locked>> | 86% | 54,302 psi | 85% | 3173 fps | 99.9% |
| Lovex D073.5 | <<locked>> | 82% | 54,172 psi | 85% | 3153 fps | 100% |
| Lovex D073.6 | <<locked>> | 88% | 54,882 psi | 86% | 3199 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 54,984 psi | 86% | 3150 fps | 99.5% |
| Lovex S062 | <<locked>> | 92% | 55,288 psi | 87% | 3199 fps | 99.9% |
| Lovex S065 | <<locked>> | 98% | 54,650 psi | 86% | 3186 fps | 97.6% |
| Lovex S070ᴾ | <<locked>> | 100% | 55,680 psi | 87% | 3219 fps | 96.7% |
| Norma 201 | <<locked>> | 90% | 57,290 psi | 90% | 3222 fps | 100% |
| Norma 202 | <<locked>> | 88% | 54,331 psi | 85% | 3169 fps | 100% |
| Norma 203B | <<locked>> | 92% | 56,028 psi | 88% | 3251 fps | 99.6% |
| Norma URPᴾ | <<locked>> | 100% | 53,505 psi | 84% | 3245 fps | 98.5% |
| Ramshot Big Game | <<locked>> | 92% | 57,014 psi | 89% | 3281 fps | 99.6% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 52,591 psi | 82% | 3232 fps | 96.8% |
| Ramshot TAC | <<locked>> | 86% | 54,926 psi | 86% | 3182 fps | 97.8% |
| Ramshot Wild Boar | <<locked>> | 86% | 54,273 psi | 85% | 3205 fps | 99.4% |
| Ramshot X-Terminator | <<locked>> | 84% | 55,463 psi | 87% | 3173 fps | 99.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,375 psi | 55% | 2051 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 57,305 psi | 90% | 3215 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 54,853 psi | 86% | 3186 fps | 96.9% |
| ReloadSwiss RS 52 | <<locked>> | 90% | 57,479 psi | 90% | 3343 fps | 99.4% |
| ReloadSwiss RS 60 | <<locked>> | 96% | 57,290 psi | 90% | 3379 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 54,259 psi | 85% | 3281 fps | 98.5% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 54,462 psi | 85% | 3310 fps | 98.2% |
| Rottweil R 901 | <<locked>> | 86% | 54,389 psi | 85% | 3150 fps | 100% |
| Rottweil R 902 | <<locked>> | 92% | 57,740 psi | 90% | 3219 fps | 100% |
| Rottweil R 903 | <<locked>> | 96% | 56,579 psi | 89% | 3245 fps | 99.9% |
| Rottweil R 907 | <<locked>> | 98% | 57,217 psi | 90% | 3219 fps | 96.1% |
| Shooters World Long Rifle | <<locked>> | 98% | 54,650 psi | 86% | 3186 fps | 97.6% |
| Shooters World Match Rifle | <<locked>> | 88% | 54,882 psi | 86% | 3199 fps | 100% |
| Shooters World Precision | <<locked>> | 92% | 55,288 psi | 87% | 3199 fps | 99.9% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 55,680 psi | 87% | 3219 fps | 96.7% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 57,217 psi | 90% | 3182 fps | 99.9% |
| SNPE Vectan SP 11 | <<locked>> | 94% | 55,172 psi | 86% | 3258 fps | 99.5% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 56,536 psi | 89% | 3163 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 88% | 56,927 psi | 89% | 3222 fps | 98.5% |
| SNPE Vectan SP 9 | <<locked>> | 90% | 57,334 psi | 90% | 3248 fps | 99.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 55,535 psi | 87% | 3110 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 55,941 psi | 88% | 3107 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 55,463 psi | 87% | 3133 fps | 96.4% |
| Somchem S321 | <<locked>> | 84% | 55,564 psi | 87% | 3205 fps | 100% |
| Somchem S335 | <<locked>> | 88% | 54,868 psi | 86% | 3104 fps | 100% |
| Somchem S341 | <<locked>> | 88% | 56,478 psi | 89% | 3212 fps | 99.6% |
| Somchem S355 | <<locked>> | 96% | 56,927 psi | 89% | 3245 fps | 99.8% |
| Somchem S365ᴾ | <<locked>> | 100% | 47,805 psi | 75% | 3182 fps | 99.8% |
| Vihtavuori N130 | <<locked>> | 84% | 55,317 psi | 87% | 3077 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 55,709 psi | 87% | 3097 fps | 100% |
| Vihtavuori N135 | <<locked>> | 92% | 57,479 psi | 90% | 3186 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 55,129 psi | 86% | 3150 fps | 100% |
| Vihtavuori N150 | <<locked>> | 96% | 55,027 psi | 86% | 3169 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 56,405 psi | 88% | 3248 fps | 98.8% |
| Vihtavuori N530 | <<locked>> | 86% | 54,781 psi | 86% | 3173 fps | 99.9% |
| Vihtavuori N540 | <<locked>> | 92% | 57,014 psi | 89% | 3196 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 55,361 psi | 87% | 3248 fps | 98.6% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 40,132 psi | 63% | 3025 fps | 96.3% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 57,246 psi | 90% | 3228 fps | 99.9% |
| Winchester 748 | <<locked>> | 86% | 54,578 psi | 86% | 3222 fps | 100% |
| Winchester 760 | <<locked>> | 98% | 54,201 psi | 85% | 3258 fps | 96.3% |
| Winchester StaBALL Match | <<locked>> | 90% | 57,522 psi | 90% | 3258 fps | 99.9% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 23.62"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 80% | 46,151 psi | 72% | 2969 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 50,546 psi | 79% | 3084 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 38,261 psi | 60% | 2854 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 45,788 psi | 72% | 3031 fps | 99.9% |
| Accurate 4064 | <<locked>> | 80% | 36,230 psi | 57% | 2838 fps | 99.3% |
| Accurate 4350 | <<locked>> | 92% | 40,625 psi | 64% | 2989 fps | 95.6% |
| ADI AR 2206H | <<locked>> | 80% | 42,569 psi | 67% | 2976 fps | 97.5% |
| ADI AR 2208 | <<locked>> | 82% | 38,609 psi | 61% | 2864 fps | 95.6% |
| ADI Benchmark 8208 | <<locked>> | 80% | 44,715 psi | 70% | 2995 fps | 98.9% |
| Alliant AR-Comp | <<locked>> | 80% | 44,701 psi | 70% | 2999 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 52,286 psi | 82% | 3228 fps | 99.5% |
| Alliant Power Pro 2000-MR | 66.7 gr | 80% | 38,711 psi | 61% | 2982 fps | 95.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 35,563 psi | 56% | 2822 fps | 96.4% |
| Alliant Reloder-10x | <<locked>> | 80% | 52,098 psi | 82% | 3081 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 38,305 psi | 60% | 2890 fps | 95.7% |
| Alliant Reloder-16 | <<locked>> | 92% | 40,538 psi | 64% | 3005 fps | 95.7% |
| Alliant Reloder-17 | 69 gr | 84% | 35,331 psi | 55% | 2897 fps | 95.6% |
| Alliant Reloder-23 | <<locked>> | 98% | 34,722 psi | 54% | 2871 fps | 95.2% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 41,959 psi | 66% | 2972 fps | 96.2% |
| Bofors RP3 | <<locked>> | 80% | 35,012 psi | 55% | 2818 fps | 96.3% |
| Bofors RP7 | <<locked>> | 96% | 53,490 psi | 84% | 3153 fps | 95.3% |
| Hodgdon Benchmark | <<locked>> | 80% | 46,630 psi | 73% | 2992 fps | 99.5% |
| Hodgdon BL-C2 | <<locked>> | 80% | 43,424 psi | 68% | 3009 fps | 99.1% |
| Hodgdon CFE223 | <<locked>> | 80% | 48,196 psi | 76% | 3169 fps | 98.2% |
| Hodgdon H322 | <<locked>> | 80% | 51,198 psi | 80% | 3117 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 52,359 psi | 82% | 3140 fps | 100% |
| Hodgdon H380 | <<locked>> | 84% | 41,394 psi | 65% | 2949 fps | 95.2% |
| Hodgdon H414 | <<locked>> | 96% | 50,357 psi | 79% | 3186 fps | 95.4% |
| Hodgdon H4895 | <<locked>> | 80% | 42,946 psi | 67% | 2989 fps | 98.1% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 34,766 psi | 54% | 2822 fps | 95.5% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 38,986 psi | 61% | 2946 fps | 97.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,933 psi | 41% | 1795 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 41,321 psi | 65% | 2936 fps | 97.7% |
| IMR 3031 | <<locked>> | 80% | 42,424 psi | 66% | 2999 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 37,985 psi | 60% | 2844 fps | 95.7% |
| IMR 4166 Enduron | <<locked>> | 86% | 49,385 psi | 77% | 3054 fps | 95% |
| IMR 4198 | <<locked>> | 80% | 52,243 psi | 82% | 3045 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 94% | 52,359 psi | 82% | 3136 fps | 95.6% |
| IMR 4831 | <<locked>> | 92% | 39,117 psi | 61% | 2936 fps | 95.2% |
| IMR 4895 | <<locked>> | 80% | 39,233 psi | 61% | 2930 fps | 96.7% |
| IMR 8208 XBR | <<locked>> | 80% | 44,715 psi | 70% | 2995 fps | 98.9% |
| Lovex D073.5 | <<locked>> | 80% | 50,604 psi | 79% | 3094 fps | 99.9% |
| Lovex D073.6 | <<locked>> | 80% | 41,408 psi | 65% | 2953 fps | 99.5% |
| Lovex S060 | <<locked>> | 80% | 42,830 psi | 67% | 2917 fps | 97.6% |
| Lovex S062 | <<locked>> | 80% | 37,652 psi | 59% | 2844 fps | 97.5% |
| Lovex S065 | <<locked>> | 92% | 45,223 psi | 71% | 3005 fps | 95.4% |
| Lovex S070 | <<locked>> | 96% | 48,921 psi | 77% | 3097 fps | 95.1% |
| Norma 201 | <<locked>> | 80% | 41,452 psi | 65% | 2923 fps | 98.4% |
| Norma 202 | <<locked>> | 80% | 41,945 psi | 66% | 2943 fps | 99.8% |
| Norma 203B | <<locked>> | 80% | 37,666 psi | 59% | 2877 fps | 96.1% |
| Norma URP | <<locked>> | 92% | 40,814 psi | 64% | 2992 fps | 95.6% |
| Ramshot Big Game | <<locked>> | 80% | 37,347 psi | 59% | 2887 fps | 95.7% |
| Ramshot Hunter | <<locked>> | 96% | 45,948 psi | 72% | 3104 fps | 95.1% |
| Ramshot TAC | <<locked>> | 80% | 44,759 psi | 70% | 2989 fps | 95.5% |
| Ramshot Wild Boar | <<locked>> | 80% | 44,164 psi | 69% | 3012 fps | 97.8% |
| Ramshot X-Terminator | <<locked>> | 80% | 48,399 psi | 76% | 3048 fps | 98.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,165 psi | 41% | 1834 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 50,212 psi | 79% | 3094 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 47,906 psi | 75% | 3061 fps | 95.3% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 40,045 psi | 63% | 2999 fps | 96.1% |
| ReloadSwiss RS 60 | 65.7 gr | 80% | 32,793 psi | 51% | 2838 fps | 97.1% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 40,538 psi | 64% | 3009 fps | 95.2% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 44,048 psi | 69% | 3094 fps | 95.5% |
| Rottweil R 901 | <<locked>> | 80% | 45,310 psi | 71% | 2986 fps | 99.9% |
| Rottweil R 902 | <<locked>> | 80% | 39,523 psi | 62% | 2874 fps | 98% |
| Rottweil R 903 | <<locked>> | 80% | 32,764 psi | 51% | 2749 fps | 95.1% |
| Rottweil R 907 | <<locked>> | 96% | 53,490 psi | 84% | 3153 fps | 95.3% |
| Shooters World Long Rifle | <<locked>> | 92% | 45,223 psi | 71% | 3005 fps | 95.4% |
| Shooters World Match Rifle | <<locked>> | 80% | 41,408 psi | 65% | 2953 fps | 99.5% |
| Shooters World Precision | <<locked>> | 80% | 37,652 psi | 59% | 2844 fps | 97.5% |
| Shooters World SW4350 | <<locked>> | 96% | 48,921 psi | 77% | 3097 fps | 95.1% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 53,243 psi | 83% | 3120 fps | 99.7% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 36,564 psi | 57% | 2874 fps | 95.5% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 52,982 psi | 83% | 3107 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 42,902 psi | 67% | 2956 fps | 95.6% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 41,104 psi | 64% | 2936 fps | 97.1% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 43,076 psi | 68% | 2894 fps | 99.8% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 35,665 psi | 56% | 2733 fps | 99.5% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 51,750 psi | 81% | 3071 fps | 95.6% |
| Somchem S321 | <<locked>> | 80% | 48,486 psi | 76% | 3084 fps | 99.6% |
| Somchem S335 | <<locked>> | 80% | 42,554 psi | 67% | 2890 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 42,743 psi | 67% | 2959 fps | 97.5% |
| Somchem S355 | <<locked>> | 80% | 33,765 psi | 53% | 2762 fps | 95.2% |
| Somchem S365 | <<locked>> | 88% | 31,792 psi | 50% | 2799 fps | 95.8% |
| Vihtavuori N130 | <<locked>> | 80% | 48,791 psi | 76% | 2976 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 43,410 psi | 68% | 2894 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 38,812 psi | 61% | 2864 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 39,639 psi | 62% | 2867 fps | 99.7% |
| Vihtavuori N150 | <<locked>> | 80% | 32,097 psi | 50% | 2697 fps | 96.2% |
| Vihtavuori N160 | <<locked>> | 90% | 40,030 psi | 63% | 2933 fps | 95.2% |
| Vihtavuori N530 | <<locked>> | 80% | 44,773 psi | 70% | 2992 fps | 99% |
| Vihtavuori N540 | <<locked>> | 80% | 38,276 psi | 60% | 2851 fps | 99.3% |
| Vihtavuori N550 | <<locked>> | 92% | 42,250 psi | 66% | 2999 fps | 95.7% |
| Vihtavuori N555 | <<locked>> | 98% | 37,521 psi | 59% | 2959 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 35,244 psi | 55% | 2789 fps | 95.9% |
| Winchester 748 | <<locked>> | 80% | 44,295 psi | 69% | 3035 fps | 99.4% |
| Winchester 760 | <<locked>> | 96% | 50,589 psi | 79% | 3189 fps | 95.4% |
| Winchester StaBALL Match | <<locked>> | 80% | 40,596 psi | 64% | 2940 fps | 97.6% |
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 110 powders for 8 x 57 PCC loaded with the .323 | 145gr | Brenneke TIG nature. ReloadSwiss RS 60 delivers the highest muzzle velocity at 3,379 fps; across all powders the maximum-charge window runs from 2,005 fps to 3,379 fps. Accurate 3100 gives the best case fill at 100 %, and 110 of the 110 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 145.0 gr projectile in 0.323" calls for a 1:12.0 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 57 PCC with the .323 | 145gr | Brenneke TIG nature 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.