Load Specifications
Load data in caliber 8 x 57 PCC with .323 | 220gr | Swift A-Frame bullet and 89 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, Norma MRP and Vihtavuori N560.
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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Max Load - Barrel Length: 23.62"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2700 | <<locked>> | 82% | 54,897 psi | 86% | 2612 fps | 99.3% |
| Accurate 3100ᴾ | <<locked>> | 100% | 57,000 psi | 89% | 2713 fps | 100% |
| Accurate 4064 | <<locked>> | 82% | 54,694 psi | 86% | 2595 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 55,521 psi | 87% | 2703 fps | 100% |
| Accurate MAGPRO | <<locked>> | 98% | 55,419 psi | 87% | 2802 fps | 97.1% |
| ADI AR 2208 | <<locked>> | 84% | 54,433 psi | 85% | 2625 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 56,159 psi | 88% | 2749 fps | 99% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 57,667 psi | 90% | 2805 fps | 98.3% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 37,130 psi | 58% | 2484 fps | 96.6% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 57,696 psi | 90% | 2795 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 55,332 psi | 87% | 2644 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 55,405 psi | 87% | 2667 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 56,202 psi | 88% | 2756 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 57,508 psi | 90% | 2772 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 55,550 psi | 87% | 2736 fps | 99% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 56,797 psi | 89% | 2802 fps | 99.2% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 53,722 psi | 84% | 2723 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 46,470 psi | 73% | 2667 fps | 99.8% |
| Alliant Reloder-26 | <<locked>> | 96% | 53,824 psi | 84% | 2812 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 51,924 psi | 81% | 2726 fps | 98.5% |
| Bofors RP3 | <<locked>> | 84% | 56,144 psi | 88% | 2661 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 56,797 psi | 89% | 2802 fps | 99.2% |
| Bofors RP7 | <<locked>> | 88% | 55,564 psi | 87% | 2657 fps | 99.4% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 46,209 psi | 72% | 2612 fps | 96.8% |
| Hodgdon H380 | <<locked>> | 84% | 56,405 psi | 88% | 2680 fps | 100% |
| Hodgdon H414 | <<locked>> | 90% | 57,580 psi | 90% | 2756 fps | 99.9% |
| Hodgdon H4350 | <<locked>> | 88% | 57,029 psi | 89% | 2713 fps | 99.3% |
| Hodgdon H4831 | <<locked>> | 98% | 57,725 psi | 90% | 2749 fps | 97.8% |
| Hodgdon H4831 SC | <<locked>> | 98% | 56,449 psi | 88% | 2730 fps | 97.5% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 56,521 psi | 89% | 2680 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 45,687 psi | 72% | 2710 fps | 98.2% |
| Hodgdon Superformance | <<locked>> | 88% | 53,809 psi | 84% | 2736 fps | 99.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,738 psi | 58% | 1644 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 57,348 psi | 90% | 2654 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 56,376 psi | 88% | 2644 fps | 99.7% |
| IMR 4350 | <<locked>> | 92% | 56,449 psi | 88% | 2687 fps | 99.5% |
| IMR 4451 Enduron | <<locked>> | 88% | 57,043 psi | 89% | 2680 fps | 99.7% |
| IMR 4831 | <<locked>> | 92% | 55,695 psi | 87% | 2694 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 56,855 psi | 89% | 2690 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 55,463 psi | 87% | 2680 fps | 97.5% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 55,027 psi | 86% | 2779 fps | 98% |
| Lovex S062 | <<locked>> | 84% | 57,580 psi | 90% | 2644 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 57,217 psi | 90% | 2677 fps | 100% |
| Lovex S070 | <<locked>> | 90% | 55,288 psi | 87% | 2671 fps | 99.8% |
| Lovex S071ᴾ | <<locked>> | 100% | 47,442 psi | 74% | 2575 fps | 99.4% |
| Norma 203B | <<locked>> | 82% | 54,694 psi | 86% | 2651 fps | 100% |
| Norma 204 | <<locked>> | 92% | 57,464 psi | 90% | 2743 fps | 99% |
| Norma MRP | <<locked>> | 98% | 56,536 psi | 89% | 2825 fps | 99.8% |
| Norma URP | <<locked>> | 92% | 57,537 psi | 90% | 2736 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 55,608 psi | 87% | 2680 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 55,608 psi | 87% | 2799 fps | 98.4% |
| Ramshot Hunter | <<locked>> | 92% | 56,478 psi | 89% | 2743 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 49,501 psi | 78% | 2677 fps | 98.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,289 psi | 58% | 1680 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 56,275 psi | 88% | 2667 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 56,927 psi | 89% | 2762 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 55,201 psi | 87% | 2726 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 57,377 psi | 90% | 2808 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 45,571 psi | 71% | 2703 fps | 99% |
| Rottweil R 902 | <<locked>> | 82% | 56,028 psi | 88% | 2612 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 56,478 psi | 89% | 2661 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 54,317 psi | 85% | 2671 fps | 97.8% |
| Rottweil R 905 | <<locked>> | 96% | 54,984 psi | 86% | 2726 fps | 99% |
| Rottweil R 907 | <<locked>> | 88% | 55,564 psi | 87% | 2657 fps | 99.4% |
| Shooters World Long Rifle | <<locked>> | 90% | 57,217 psi | 90% | 2677 fps | 100% |
| Shooters World Precision | <<locked>> | 84% | 57,580 psi | 90% | 2644 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 55,288 psi | 87% | 2671 fps | 99.8% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 54,215 psi | 85% | 2667 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 56,942 psi | 89% | 2543 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 56,768 psi | 89% | 2631 fps | 99.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 54,520 psi | 85% | 2723 fps | 98.9% |
| Somchem S355 | <<locked>> | 86% | 56,304 psi | 88% | 2654 fps | 100% |
| Somchem S361 | <<locked>> | 94% | 55,840 psi | 88% | 2664 fps | 97.4% |
| Somchem S365 | <<locked>> | 94% | 57,232 psi | 90% | 2736 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 55,535 psi | 87% | 2703 fps | 99.5% |
| Vihtavuori N135 | <<locked>> | 82% | 56,652 psi | 89% | 2569 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 56,753 psi | 89% | 2585 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 57,609 psi | 90% | 2631 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 56,173 psi | 88% | 2684 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 54,708 psi | 86% | 2680 fps | 99.2% |
| Vihtavuori N540 | <<locked>> | 82% | 54,810 psi | 86% | 2582 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 55,288 psi | 87% | 2690 fps | 100% |
| Vihtavuori N555 | <<locked>> | 98% | 56,333 psi | 88% | 2749 fps | 100% |
| Vihtavuori N560 | <<locked>> | 98% | 56,724 psi | 89% | 2818 fps | 98% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 48,457 psi | 76% | 2677 fps | 96.6% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 55,651 psi | 87% | 2651 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 57,580 psi | 90% | 2756 fps | 99.9% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 49,226 psi | 77% | 2792 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 55,521 psi | 87% | 2697 fps | 98.9% |
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 2700 | <<locked>> | 80% | 51,561 psi | 81% | 2562 fps | 98.9% |
| Accurate 3100 | <<locked>> | 82% | 31,111 psi | 49% | 2251 fps | 95.4% |
| Accurate 4064 | <<locked>> | 80% | 51,358 psi | 80% | 2549 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 39,465 psi | 62% | 2444 fps | 99.3% |
| Accurate MAGPRO | <<locked>> | 94% | 48,124 psi | 75% | 2684 fps | 95.5% |
| ADI AR 2208 | <<locked>> | 80% | 48,240 psi | 76% | 2533 fps | 100% |
| ADI AR 2209 | <<locked>> | 86% | 40,611 psi | 64% | 2480 fps | 95.7% |
| ADI AR 2213 | <<locked>> | 92% | 44,208 psi | 69% | 2579 fps | 95.3% |
| ADI AR 2225 | <<locked>> | 98% | 34,780 psi | 55% | 2425 fps | 95.4% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 53,780 psi | 84% | 2740 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 48,994 psi | 77% | 2556 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 52,040 psi | 82% | 2618 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 38,334 psi | 60% | 2454 fps | 99.4% |
| Alliant Reloder-17 | <<locked>> | 80% | 43,555 psi | 68% | 2566 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 37,942 psi | 59% | 2425 fps | 95% |
| Alliant Reloder-22 | <<locked>> | 88% | 38,087 psi | 60% | 2470 fps | 95.2% |
| Alliant Reloder-23 | <<locked>> | 80% | 28,166 psi | 44% | 2231 fps | 97.8% |
| Alliant Reloder-25 | <<locked>> | 86% | 29,921 psi | 47% | 2290 fps | 95.2% |
| Alliant Reloder-26 | 65 gr | 80% | 30,153 psi | 47% | 2339 fps | 96.4% |
| Bofors RP15 | <<locked>> | 92% | 40,118 psi | 63% | 2513 fps | 95.7% |
| Bofors RP3 | <<locked>> | 80% | 49,371 psi | 77% | 2566 fps | 100% |
| Bofors RP5 | <<locked>> | 88% | 38,087 psi | 60% | 2470 fps | 95.2% |
| Bofors RP7 | <<locked>> | 80% | 43,207 psi | 68% | 2454 fps | 97.6% |
| Hodgdon H1000 | <<locked>> | 98% | 43,250 psi | 68% | 2556 fps | 95.9% |
| Hodgdon H380 | <<locked>> | 80% | 49,487 psi | 78% | 2579 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 80% | 41,321 psi | 65% | 2487 fps | 97.7% |
| Hodgdon H4350 | <<locked>> | 80% | 44,251 psi | 69% | 2507 fps | 97.2% |
| Hodgdon H4831 | <<locked>> | 92% | 47,166 psi | 74% | 2582 fps | 95.5% |
| Hodgdon H4831 SC | <<locked>> | 92% | 46,354 psi | 73% | 2569 fps | 95.3% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 35,940 psi | 56% | 2352 fps | 99.7% |
| Hodgdon Retumbo | <<locked>> | 94% | 37,637 psi | 59% | 2530 fps | 95.4% |
| Hodgdon Superformance | <<locked>> | 80% | 40,219 psi | 63% | 2500 fps | 97.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,485 psi | 43% | 1467 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 50,763 psi | 80% | 2562 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 52,794 psi | 83% | 2592 fps | 99.5% |
| IMR 4350 | <<locked>> | 80% | 38,856 psi | 61% | 2388 fps | 96.5% |
| IMR 4451 Enduron | <<locked>> | 80% | 44,599 psi | 70% | 2480 fps | 98.3% |
| IMR 4831 | <<locked>> | 80% | 37,826 psi | 59% | 2398 fps | 99.1% |
| IMR 4895 | <<locked>> | 80% | 53,403 psi | 84% | 2641 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 46,079 psi | 72% | 2526 fps | 95.5% |
| IMR 7828 SSC | <<locked>> | 94% | 45,005 psi | 71% | 2608 fps | 95.7% |
| Lovex S062 | <<locked>> | 80% | 51,010 psi | 80% | 2556 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 42,163 psi | 66% | 2434 fps | 98.9% |
| Lovex S070 | <<locked>> | 80% | 40,509 psi | 63% | 2421 fps | 97.7% |
| Lovex S071 | <<locked>> | 86% | 30,414 psi | 48% | 2234 fps | 95.1% |
| Norma 203B | <<locked>> | 80% | 51,401 psi | 81% | 2605 fps | 100% |
| Norma 204 | <<locked>> | 82% | 41,089 psi | 64% | 2470 fps | 95.8% |
| Norma MRP | 66.2 gr | 84% | 34,795 psi | 55% | 2425 fps | 95.5% |
| Norma URP | <<locked>> | 80% | 39,189 psi | 61% | 2438 fps | 99.2% |
| Ramshot Big Game | <<locked>> | 80% | 52,011 psi | 82% | 2628 fps | 100% |
| Ramshot Grand | <<locked>> | 92% | 41,800 psi | 66% | 2556 fps | 95% |
| Ramshot Hunter | <<locked>> | 80% | 37,942 psi | 59% | 2428 fps | 97.6% |
| Ramshot Magnum | <<locked>> | 92% | 37,246 psi | 58% | 2444 fps | 95.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,036 psi | 44% | 1503 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 49,545 psi | 78% | 2566 fps | 99.4% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 46,238 psi | 72% | 2612 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 39,233 psi | 61% | 2461 fps | 99.1% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 37,927 psi | 59% | 2470 fps | 98.7% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 34,505 psi | 54% | 2448 fps | 95.1% |
| Rottweil R 902 | <<locked>> | 80% | 52,837 psi | 83% | 2566 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 46,557 psi | 73% | 2516 fps | 100% |
| Rottweil R 904 | <<locked>> | 86% | 42,279 psi | 66% | 2464 fps | 95% |
| Rottweil R 905 | <<locked>> | 86% | 39,610 psi | 62% | 2461 fps | 95.8% |
| Rottweil R 907 | <<locked>> | 80% | 43,207 psi | 68% | 2454 fps | 97.6% |
| Shooters World Long Rifle | <<locked>> | 80% | 42,163 psi | 66% | 2434 fps | 98.9% |
| Shooters World Precision | <<locked>> | 80% | 51,010 psi | 80% | 2556 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 40,509 psi | 63% | 2421 fps | 97.7% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 47,616 psi | 75% | 2569 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 47,601 psi | 75% | 2418 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 41,350 psi | 65% | 2385 fps | 97.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 39,233 psi | 61% | 2457 fps | 95.6% |
| Somchem S355 | <<locked>> | 80% | 46,673 psi | 73% | 2513 fps | 100% |
| Somchem S361 | <<locked>> | 88% | 45,861 psi | 72% | 2507 fps | 95.1% |
| Somchem S365 | <<locked>> | 80% | 35,694 psi | 56% | 2398 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 35,230 psi | 55% | 2339 fps | 95.2% |
| Vihtavuori N135 | <<locked>> | 80% | 53,330 psi | 84% | 2526 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 53,287 psi | 84% | 2539 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 44,643 psi | 70% | 2448 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 40,495 psi | 63% | 2434 fps | 99.3% |
| Vihtavuori N165 | <<locked>> | 88% | 37,057 psi | 58% | 2375 fps | 95.4% |
| Vihtavuori N540 | <<locked>> | 80% | 51,343 psi | 80% | 2536 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 39,914 psi | 63% | 2438 fps | 99.1% |
| Vihtavuori N555 | <<locked>> | 80% | 31,357 psi | 49% | 2303 fps | 97.9% |
| Vihtavuori N560 | 72.5 gr | 92% | 46,108 psi | 72% | 2641 fps | 95.6% |
| Vihtavuori N565 | <<locked>> | 98% | 45,150 psi | 71% | 2615 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 39,479 psi | 62% | 2405 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 41,524 psi | 65% | 2490 fps | 97.8% |
| Winchester StaBALL HD | <<locked>> | 80% | 24,918 psi | 39% | 2215 fps | 97.1% |
| Winchester Supreme 780 | <<locked>> | 88% | 39,407 psi | 62% | 2428 fps | 95.4% |
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 89 powders for 8 x 57 PCC loaded with the .323 | 220gr | Swift A-Frame. Norma MRP delivers the highest muzzle velocity at 2,825 fps; across all powders the maximum-charge window runs from 1,644 fps to 2,825 fps. Accurate 3100 gives the best case fill at 100 %, and 89 of the 89 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 58–90 %, leaving at least 10 % headroom. The 220.0 gr projectile in 0.323" calls for a 1:14.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2213, ADI AR 2225 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 Reloder-26, Norma MRP, Vihtavuori N560 rank at the top here: for 8 x 57 PCC with the .323 | 220gr | Swift A-Frame 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.