Load Specifications
Bullet:.323 | 180gr | Hornady GMX
Bullet Manufacturer:Hornady
Bullet Weight:180 gr
Bullet Diameter:0.323"
Bullet Length:<<locked>>
Caliber:8 x 57 PCC load data
Case Length (l3):2.244"
Cartridge Length (C.O.L.):<<locked>>
Case Capacity:90 Grains of Water
Primer Size:Large Rifle Magnum (LRM)
Barrel Length:23.62"
Max. allowed Pressure:63,817 psi
Recommended Twist Rate:1:12.0
Load data in caliber 8 x 57 PCC with .323 | 180gr | Hornady GMX bullet and 101 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 70, 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: 23.62"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 82% | 54,592 psi | 86% | 2789 fps | 100% |
| Accurate 2495 | <<locked>> | 88% | 57,043 psi | 89% | 2858 fps | 100% |
| Accurate 2520 | <<locked>> | 82% | 55,303 psi | 87% | 2881 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 56,289 psi | 88% | 2874 fps | 97.7% |
| Accurate 3100ᴾ | <<locked>> | 100% | 44,512 psi | 70% | 2769 fps | 97.1% |
| Accurate 4064 | <<locked>> | 90% | 57,319 psi | 90% | 2910 fps | 100% |
| Accurate 4350 | <<locked>> | 96% | 54,099 psi | 85% | 2953 fps | 99.7% |
| ADI AR 2206H | <<locked>> | 86% | 57,638 psi | 90% | 2949 fps | 100% |
| ADI AR 2208 | <<locked>> | 90% | 55,274 psi | 87% | 2900 fps | 99.9% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 52,489 psi | 82% | 2933 fps | 96.1% |
| ADI Benchmark 8208 | <<locked>> | 84% | 56,478 psi | 89% | 2897 fps | 100% |
| Alliant AR-Comp | <<locked>> | 84% | 57,653 psi | 90% | 2864 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 53,882 psi | 84% | 3015 fps | 99.9% |
| Alliant Power Pro Varmintᴾ | <<locked>> | 100% | 52,243 psi | 82% | 2927 fps | 96.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 90% | 55,303 psi | 87% | 2917 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 88% | 55,724 psi | 87% | 2940 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 98% | 55,361 psi | 87% | 3015 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 94% | 56,695 psi | 89% | 3048 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 51,401 psi | 81% | 2917 fps | 96% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 42,134 psi | 66% | 2795 fps | 99.5% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 47,703 psi | 75% | 2972 fps | 99.1% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 57,624 psi | 90% | 2966 fps | 99.9% |
| Bofors RP3 | <<locked>> | 90% | 56,115 psi | 88% | 2936 fps | 100% |
| Bofors RP7 | <<locked>> | 94% | 55,869 psi | 88% | 2910 fps | 97.9% |
| Hodgdon Benchmark | <<locked>> | 82% | 54,346 psi | 85% | 2825 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 84% | 55,941 psi | 88% | 2923 fps | 100% |
| Hodgdon H380 | <<locked>> | 90% | 56,942 psi | 89% | 2949 fps | 99.7% |
| Hodgdon H414 | <<locked>> | 96% | 57,174 psi | 90% | 3012 fps | 98.6% |
| Hodgdon H4350 | <<locked>> | 94% | 57,450 psi | 90% | 2969 fps | 97.5% |
| Hodgdon H4895 | <<locked>> | 84% | 54,621 psi | 86% | 2907 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 55,201 psi | 87% | 2933 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 54,389 psi | 85% | 2940 fps | 100% |
| Hodgdon Superformance | <<locked>> | 96% | 57,696 psi | 90% | 3048 fps | 98.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,737 psi | 56% | 1795 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 55,738 psi | 87% | 2907 fps | 100% |
| IMR 3031 | <<locked>> | 84% | 54,897 psi | 86% | 2887 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 54,549 psi | 85% | 2877 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 86% | 54,389 psi | 85% | 2861 fps | 98.1% |
| IMR 4350 | <<locked>> | 98% | 56,608 psi | 89% | 2940 fps | 98% |
| IMR 4451 Enduron | <<locked>> | 92% | 54,418 psi | 85% | 2887 fps | 98% |
| IMR 4831 | <<locked>> | 98% | 54,665 psi | 86% | 2946 fps | 99.8% |
| IMR 4895 | <<locked>> | 88% | 57,188 psi | 90% | 2969 fps | 100% |
| IMR 8208 XBR | <<locked>> | 84% | 56,478 psi | 89% | 2897 fps | 100% |
| Lovex D073.6 | <<locked>> | 86% | 57,580 psi | 90% | 2920 fps | 100% |
| Lovex S060 | <<locked>> | 86% | 56,710 psi | 89% | 2871 fps | 100% |
| Lovex S062 | <<locked>> | 88% | 54,534 psi | 85% | 2874 fps | 100% |
| Lovex S065 | <<locked>> | 96% | 57,203 psi | 90% | 2930 fps | 99.4% |
| Lovex S070 | <<locked>> | 96% | 54,853 psi | 86% | 2917 fps | 98.4% |
| Norma 201 | <<locked>> | 86% | 56,101 psi | 88% | 2890 fps | 100% |
| Norma 202 | <<locked>> | 86% | 56,768 psi | 89% | 2887 fps | 100% |
| Norma 203B | <<locked>> | 88% | 54,940 psi | 86% | 2927 fps | 100% |
| Norma 204 | <<locked>> | 98% | 57,609 psi | 90% | 2992 fps | 97.1% |
| Norma MRPᴾ | <<locked>> | 100% | 47,456 psi | 74% | 2927 fps | 96.8% |
| Norma URP | <<locked>> | 98% | 56,826 psi | 89% | 2995 fps | 99.9% |
| Ramshot Big Game | <<locked>> | 88% | 55,854 psi | 88% | 2956 fps | 100% |
| Ramshot Hunter | <<locked>> | 98% | 55,796 psi | 87% | 2995 fps | 99.1% |
| Ramshot TAC | <<locked>> | 84% | 56,768 psi | 89% | 2920 fps | 99.4% |
| Ramshot Wild Boar | <<locked>> | 84% | 56,420 psi | 88% | 2933 fps | 100% |
| Ramshot X-Terminator | <<locked>> | 82% | 57,188 psi | 90% | 2897 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,071 psi | 57% | 1834 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 57,087 psi | 89% | 2933 fps | 98.9% |
| ReloadSwiss RS 52 | <<locked>> | 86% | 56,565 psi | 89% | 3009 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 92% | 56,521 psi | 89% | 3048 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 53,954 psi | 85% | 2976 fps | 99.6% |
| ReloadSwiss RS 70 | <<locked>> | 98% | 57,087 psi | 89% | 3068 fps | 99.8% |
| Rottweil R 901 | <<locked>> | 84% | 56,579 psi | 89% | 2864 fps | 100% |
| Rottweil R 902 | <<locked>> | 88% | 56,594 psi | 89% | 2887 fps | 100% |
| Rottweil R 903 | <<locked>> | 92% | 55,970 psi | 88% | 2927 fps | 100% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 50,154 psi | 79% | 2897 fps | 95.9% |
| Rottweil R 907 | <<locked>> | 94% | 55,869 psi | 88% | 2910 fps | 97.9% |
| Shooters World Long Rifle | <<locked>> | 96% | 57,203 psi | 90% | 2930 fps | 99.4% |
| Shooters World Match Rifle | <<locked>> | 86% | 57,580 psi | 90% | 2920 fps | 100% |
| Shooters World Precision | <<locked>> | 88% | 54,534 psi | 85% | 2874 fps | 100% |
| Shooters World SW4350 | <<locked>> | 96% | 54,853 psi | 86% | 2917 fps | 98.4% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 54,215 psi | 85% | 2936 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 55,129 psi | 86% | 2894 fps | 99.5% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 55,927 psi | 88% | 2917 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 57,522 psi | 90% | 2825 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 54,578 psi | 86% | 2776 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 57,522 psi | 90% | 2887 fps | 98.5% |
| Somchem S321 | <<locked>> | 82% | 57,682 psi | 90% | 2927 fps | 100% |
| Somchem S335 | <<locked>> | 86% | 56,913 psi | 89% | 2822 fps | 100% |
| Somchem S341 | <<locked>> | 84% | 54,839 psi | 86% | 2884 fps | 100% |
| Somchem S355 | <<locked>> | 92% | 55,999 psi | 88% | 2923 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 55,303 psi | 87% | 2995 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 50,937 psi | 80% | 2877 fps | 97% |
| Vihtavuori N130 | <<locked>> | 82% | 57,130 psi | 90% | 2782 fps | 100% |
| Vihtavuori N133 | <<locked>> | 84% | 54,505 psi | 85% | 2762 fps | 100% |
| Vihtavuori N135 | <<locked>> | 88% | 56,681 psi | 89% | 2848 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 57,363 psi | 90% | 2867 fps | 100% |
| Vihtavuori N150 | <<locked>> | 94% | 57,624 psi | 90% | 2900 fps | 100% |
| Vihtavuori N160 | <<locked>> | 96% | 55,680 psi | 87% | 2940 fps | 99.8% |
| Vihtavuori N530 | <<locked>> | 84% | 56,811 psi | 89% | 2894 fps | 100% |
| Vihtavuori N540 | <<locked>> | 88% | 55,637 psi | 87% | 2864 fps | 100% |
| Vihtavuori N550 | <<locked>> | 96% | 54,534 psi | 85% | 2940 fps | 99.6% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 46,818 psi | 73% | 2874 fps | 99.4% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 55,753 psi | 87% | 2913 fps | 100% |
| Winchester 748 | <<locked>> | 84% | 57,334 psi | 90% | 2943 fps | 100% |
| Winchester 760 | <<locked>> | 96% | 57,174 psi | 90% | 3012 fps | 98.6% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 37,811 psi | 59% | 2815 fps | 99.6% |
| Winchester StaBALL Match | <<locked>> | 86% | 55,970 psi | 88% | 2927 fps | 100% |
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% | 51,300 psi | 80% | 2740 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 43,714 psi | 69% | 2661 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 51,517 psi | 81% | 2825 fps | 100% |
| Accurate 2700 | <<locked>> | 82% | 45,977 psi | 72% | 2700 fps | 95.5% |
| Accurate 3100 | <<locked>> | 96% | 38,609 psi | 61% | 2651 fps | 95.4% |
| Accurate 4064 | <<locked>> | 80% | 41,379 psi | 65% | 2657 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 32,909 psi | 52% | 2536 fps | 95.3% |
| ADI AR 2206H | <<locked>> | 80% | 47,500 psi | 74% | 2785 fps | 99.7% |
| ADI AR 2208 | <<locked>> | 80% | 40,248 psi | 63% | 2628 fps | 98.1% |
| ADI AR 2209 | <<locked>> | 98% | 49,081 psi | 77% | 2871 fps | 95.2% |
| ADI Benchmark 8208 | <<locked>> | 80% | 49,676 psi | 78% | 2792 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 50,647 psi | 79% | 2772 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 43,627 psi | 68% | 2825 fps | 98.8% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 48,878 psi | 77% | 2867 fps | 95.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 40,103 psi | 63% | 2651 fps | 99.3% |
| Alliant Reloder-15 | <<locked>> | 80% | 43,062 psi | 67% | 2720 fps | 98.8% |
| Alliant Reloder-16 | <<locked>> | 82% | 33,141 psi | 52% | 2552 fps | 95.4% |
| Alliant Reloder-17 | 62.4 gr | 80% | 34,751 psi | 54% | 2625 fps | 97.9% |
| Alliant Reloder-19 | <<locked>> | 98% | 48,167 psi | 75% | 2858 fps | 95.2% |
| Alliant Reloder-23 | <<locked>> | 88% | 28,689 psi | 45% | 2454 fps | 95% |
| Alliant Reloder-26 | <<locked>> | 92% | 35,578 psi | 56% | 2700 fps | 95.7% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 46,949 psi | 74% | 2792 fps | 99.1% |
| Bofors RP3 | <<locked>> | 80% | 39,769 psi | 62% | 2654 fps | 99.3% |
| Bofors RP7 | <<locked>> | 86% | 43,410 psi | 68% | 2687 fps | 95.1% |
| Hodgdon Benchmark | <<locked>> | 80% | 51,198 psi | 80% | 2776 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 48,892 psi | 77% | 2815 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 40,654 psi | 64% | 2664 fps | 97.3% |
| Hodgdon H414 | <<locked>> | 88% | 43,410 psi | 68% | 2769 fps | 95.8% |
| Hodgdon H4350 | <<locked>> | 88% | 47,297 psi | 74% | 2799 fps | 95.4% |
| Hodgdon H4895 | <<locked>> | 80% | 47,964 psi | 75% | 2795 fps | 99.9% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 28,500 psi | 45% | 2395 fps | 95.3% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 44,164 psi | 69% | 2766 fps | 99.8% |
| Hodgdon Superformance | 72.6 gr | 88% | 43,178 psi | 68% | 2789 fps | 95.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,440 psi | 41% | 1601 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 46,021 psi | 72% | 2746 fps | 99.7% |
| IMR 3031 | <<locked>> | 80% | 48,022 psi | 75% | 2785 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 42,279 psi | 66% | 2664 fps | 98.8% |
| IMR 4166 Enduron | <<locked>> | 80% | 44,860 psi | 70% | 2690 fps | 96.1% |
| IMR 4350 | <<locked>> | 90% | 43,888 psi | 69% | 2717 fps | 95.2% |
| IMR 4451 Enduron | <<locked>> | 84% | 42,351 psi | 66% | 2667 fps | 95.3% |
| IMR 4831 | <<locked>> | 82% | 31,981 psi | 50% | 2497 fps | 95% |
| IMR 4895 | <<locked>> | 80% | 44,164 psi | 69% | 2749 fps | 99.4% |
| IMR 8208 XBR | <<locked>> | 80% | 49,676 psi | 78% | 2792 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 46,920 psi | 74% | 2759 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 47,239 psi | 74% | 2720 fps | 99.7% |
| Lovex S062 | <<locked>> | 80% | 42,293 psi | 66% | 2667 fps | 99.7% |
| Lovex S065 | <<locked>> | 82% | 36,999 psi | 58% | 2559 fps | 95.2% |
| Lovex S070 | <<locked>> | 88% | 42,467 psi | 67% | 2694 fps | 95.7% |
| Norma 201 | <<locked>> | 80% | 46,311 psi | 73% | 2730 fps | 99.9% |
| Norma 202 | <<locked>> | 80% | 46,818 psi | 73% | 2736 fps | 100% |
| Norma 203B | <<locked>> | 80% | 42,453 psi | 67% | 2707 fps | 99.1% |
| Norma 204 | <<locked>> | 94% | 50,067 psi | 78% | 2871 fps | 95.4% |
| Norma MRP | <<locked>> | 98% | 44,164 psi | 69% | 2861 fps | 95.8% |
| Norma URP | <<locked>> | 82% | 33,228 psi | 52% | 2539 fps | 95.2% |
| Ramshot Big Game | <<locked>> | 80% | 42,366 psi | 66% | 2723 fps | 99% |
| Ramshot Hunter | <<locked>> | 88% | 39,769 psi | 62% | 2700 fps | 95.7% |
| Ramshot TAC | <<locked>> | 80% | 49,487 psi | 78% | 2802 fps | 98.5% |
| Ramshot Wild Boar | <<locked>> | 80% | 49,414 psi | 77% | 2822 fps | 99.8% |
| Ramshot X-Terminator | <<locked>> | 80% | 53,505 psi | 84% | 2841 fps | 99.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,818 psi | 42% | 1637 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 41,031 psi | 64% | 2644 fps | 95.7% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 45,847 psi | 72% | 2828 fps | 99.2% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 37,028 psi | 58% | 2694 fps | 99.9% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 35,244 psi | 55% | 2615 fps | 95.8% |
| ReloadSwiss RS 70 | 68.1 gr | 86% | 37,478 psi | 59% | 2684 fps | 95.9% |
| Rottweil R 901 | <<locked>> | 80% | 50,183 psi | 79% | 2769 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 44,135 psi | 69% | 2684 fps | 99.8% |
| Rottweil R 903 | <<locked>> | 80% | 37,376 psi | 59% | 2598 fps | 98.6% |
| Rottweil R 905 | <<locked>> | 98% | 46,760 psi | 73% | 2835 fps | 95.1% |
| Rottweil R 907 | <<locked>> | 86% | 43,410 psi | 68% | 2687 fps | 95.1% |
| Shooters World Long Rifle | <<locked>> | 82% | 36,999 psi | 58% | 2559 fps | 95.2% |
| Shooters World Match Rifle | <<locked>> | 80% | 46,920 psi | 74% | 2759 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 42,293 psi | 66% | 2667 fps | 99.7% |
| Shooters World SW4350 | <<locked>> | 88% | 42,467 psi | 67% | 2694 fps | 95.7% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 38,595 psi | 60% | 2651 fps | 98.3% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 47,935 psi | 75% | 2776 fps | 98.7% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 45,948 psi | 72% | 2753 fps | 99.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 47,732 psi | 75% | 2684 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 39,871 psi | 62% | 2546 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 41,408 psi | 65% | 2612 fps | 95.2% |
| Somchem S321 | <<locked>> | 80% | 53,882 psi | 84% | 2871 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 47,239 psi | 74% | 2680 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 47,776 psi | 75% | 2772 fps | 99.7% |
| Somchem S355 | <<locked>> | 80% | 38,189 psi | 60% | 2602 fps | 98.6% |
| Somchem S365 | <<locked>> | 80% | 27,804 psi | 44% | 2431 fps | 96.6% |
| Somchem S385 | <<locked>> | 96% | 44,512 psi | 70% | 2762 fps | 95.4% |
| Vihtavuori N130 | <<locked>> | 80% | 53,766 psi | 84% | 2736 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 48,211 psi | 76% | 2671 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 43,976 psi | 69% | 2661 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 44,324 psi | 69% | 2671 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 36,303 psi | 57% | 2536 fps | 99.2% |
| Vihtavuori N160 | <<locked>> | 82% | 34,780 psi | 55% | 2546 fps | 95.8% |
| Vihtavuori N530 | <<locked>> | 80% | 49,734 psi | 78% | 2785 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 42,801 psi | 67% | 2661 fps | 100% |
| Vihtavuori N550 | <<locked>> | 82% | 34,185 psi | 54% | 2543 fps | 95.3% |
| Vihtavuori N555 | <<locked>> | 88% | 31,140 psi | 49% | 2533 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 32,140 psi | 50% | 2464 fps | 97.2% |
| Winchester 748 | <<locked>> | 80% | 49,995 psi | 78% | 2835 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 40,785 psi | 64% | 2713 fps | 95% |
| Winchester StaBALL HD | <<locked>> | 92% | 28,805 psi | 45% | 2533 fps | 95.7% |
| Winchester StaBALL Match | <<locked>> | 80% | 45,629 psi | 72% | 2756 fps | 99.7% |
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 101 powders for 8 x 57 PCC loaded with the .323 | 180gr | Hornady GMX. ReloadSwiss RS 70 delivers the highest muzzle velocity at 3,068 fps; across all powders the maximum-charge window runs from 1,795 fps to 3,068 fps. Accurate 3100 gives the best case fill at 100 %, and 101 of the 101 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 180.0 gr projectile in 0.323" calls for a 1:12.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2209, Alliant Power Pro Varmint 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. ReloadSwiss RS 70, Hodgdon Superformance, Alliant Reloder-17 rank at the top here: for 8 x 57 PCC with the .323 | 180gr | Hornady GMX 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.