Load Specifications
Load data in caliber 8 x 57 PCC with .323 | 220gr | Hornady SP bullet and 90 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.
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 2700 | <<locked>> | 82% | 55,593 psi | 87% | 2628 fps | 99.4% |
| Accurate 3100 | <<locked>> | 98% | 54,447 psi | 85% | 2684 fps | 99.9% |
| Accurate 4064 | <<locked>> | 82% | 55,390 psi | 87% | 2605 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 56,333 psi | 88% | 2720 fps | 100% |
| Accurate MAGPRO | <<locked>> | 98% | 56,478 psi | 89% | 2822 fps | 97.4% |
| ADI AR 2208 | <<locked>> | 84% | 55,013 psi | 86% | 2638 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 57,043 psi | 89% | 2769 fps | 99.2% |
| ADI AR 2213 | <<locked>> | 98% | 54,766 psi | 86% | 2769 fps | 98% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 37,695 psi | 59% | 2503 fps | 96.9% |
| Alliant Power Pro Varmint | <<locked>> | 96% | 57,188 psi | 90% | 2762 fps | 99.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 56,202 psi | 88% | 2661 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 56,289 psi | 88% | 2680 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 57,058 psi | 89% | 2772 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 54,694 psi | 86% | 2740 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 56,420 psi | 88% | 2756 fps | 99.1% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 57,696 psi | 90% | 2818 fps | 99.4% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 54,708 psi | 86% | 2740 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 47,442 psi | 74% | 2687 fps | 99.9% |
| Alliant Reloder-26 | <<locked>> | 96% | 55,042 psi | 86% | 2828 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 53,040 psi | 83% | 2746 fps | 98.7% |
| Bofors RP3 | <<locked>> | 84% | 57,029 psi | 89% | 2677 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 43,323 psi | 68% | 2615 fps | 96.2% |
| Bofors RP5ᴾ | <<locked>> | 100% | 57,696 psi | 90% | 2818 fps | 99.4% |
| Bofors RP7 | <<locked>> | 88% | 56,289 psi | 88% | 2674 fps | 99.6% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 47,021 psi | 74% | 2635 fps | 97.2% |
| Hodgdon H380 | <<locked>> | 84% | 57,217 psi | 90% | 2697 fps | 100% |
| Hodgdon H414 | <<locked>> | 88% | 54,824 psi | 86% | 2720 fps | 99.7% |
| Hodgdon H4350 | <<locked>> | 86% | 54,360 psi | 85% | 2680 fps | 99% |
| Hodgdon H4831 | <<locked>> | 96% | 54,810 psi | 86% | 2710 fps | 97.4% |
| Hodgdon H4831 SC | <<locked>> | 98% | 57,508 psi | 90% | 2749 fps | 97.8% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 57,551 psi | 90% | 2697 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 46,412 psi | 73% | 2730 fps | 98.5% |
| Hodgdon Superformance | <<locked>> | 88% | 54,723 psi | 86% | 2756 fps | 99.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,637 psi | 57% | 1647 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 54,723 psi | 86% | 2625 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 56,913 psi | 89% | 2657 fps | 99.8% |
| IMR 4350 | <<locked>> | 92% | 57,348 psi | 90% | 2707 fps | 99.7% |
| IMR 4451 Enduron | <<locked>> | 86% | 54,389 psi | 85% | 2644 fps | 99.6% |
| IMR 4831 | <<locked>> | 92% | 56,695 psi | 89% | 2710 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 57,740 psi | 90% | 2707 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 56,246 psi | 88% | 2697 fps | 97.8% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 55,825 psi | 87% | 2795 fps | 98.3% |
| Lovex S062 | <<locked>> | 82% | 54,955 psi | 86% | 2615 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 54,520 psi | 85% | 2641 fps | 100% |
| Lovex S070 | <<locked>> | 90% | 55,999 psi | 88% | 2687 fps | 99.8% |
| Lovex S071ᴾ | <<locked>> | 100% | 48,341 psi | 76% | 2592 fps | 99.6% |
| Norma 203B | <<locked>> | 82% | 55,579 psi | 87% | 2667 fps | 100% |
| Norma 204 | <<locked>> | 90% | 54,563 psi | 86% | 2707 fps | 98.7% |
| Norma MRP | <<locked>> | 98% | 57,450 psi | 90% | 2841 fps | 99.9% |
| Norma URP | <<locked>> | 90% | 55,042 psi | 86% | 2707 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 56,391 psi | 88% | 2694 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 56,666 psi | 89% | 2822 fps | 98.7% |
| Ramshot Hunter | <<locked>> | 92% | 57,421 psi | 90% | 2762 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 50,662 psi | 79% | 2700 fps | 99% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,362 psi | 59% | 1686 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 57,029 psi | 89% | 2684 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 54,157 psi | 85% | 2730 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 56,188 psi | 88% | 2743 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 54,447 psi | 85% | 2769 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 46,354 psi | 73% | 2723 fps | 99.2% |
| Rottweil R 902 | <<locked>> | 82% | 56,724 psi | 89% | 2621 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 57,348 psi | 90% | 2677 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 55,216 psi | 87% | 2687 fps | 98.1% |
| Rottweil R 905 | <<locked>> | 96% | 55,941 psi | 88% | 2746 fps | 99.2% |
| Rottweil R 907 | <<locked>> | 88% | 56,289 psi | 88% | 2674 fps | 99.6% |
| Shooters World Long Rifle | <<locked>> | 88% | 54,520 psi | 85% | 2641 fps | 100% |
| Shooters World Precision | <<locked>> | 82% | 54,955 psi | 86% | 2615 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 55,999 psi | 88% | 2687 fps | 99.8% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 54,998 psi | 86% | 2680 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 54,288 psi | 85% | 2513 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 57,696 psi | 90% | 2651 fps | 99.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 55,477 psi | 87% | 2743 fps | 99.1% |
| Somchem S355 | <<locked>> | 86% | 56,913 psi | 89% | 2667 fps | 100% |
| Somchem S361 | <<locked>> | 94% | 56,753 psi | 89% | 2684 fps | 97.6% |
| Somchem S365 | <<locked>> | 92% | 54,694 psi | 86% | 2707 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 56,376 psi | 88% | 2720 fps | 99.6% |
| Vihtavuori N135 | <<locked>> | 82% | 57,406 psi | 90% | 2582 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 57,377 psi | 90% | 2598 fps | 100% |
| Vihtavuori N150 | <<locked>> | 86% | 54,882 psi | 86% | 2602 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 56,913 psi | 89% | 2697 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 55,767 psi | 87% | 2700 fps | 99.3% |
| Vihtavuori N540 | <<locked>> | 82% | 55,608 psi | 87% | 2595 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 55,956 psi | 88% | 2703 fps | 100% |
| Vihtavuori N555 | <<locked>> | 98% | 57,363 psi | 90% | 2766 fps | 100% |
| Vihtavuori N560 | <<locked>> | 98% | 57,508 psi | 90% | 2835 fps | 98.2% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 49,472 psi | 78% | 2697 fps | 96.9% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 56,536 psi | 89% | 2664 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 54,824 psi | 86% | 2720 fps | 99.7% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 50,560 psi | 79% | 2812 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 56,579 psi | 89% | 2717 fps | 99.1% |
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% | 52,098 psi | 82% | 2575 fps | 99% |
| Accurate 3100 | <<locked>> | 82% | 31,763 psi | 50% | 2270 fps | 95.8% |
| Accurate 4064 | <<locked>> | 80% | 52,069 psi | 82% | 2562 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 40,306 psi | 63% | 2461 fps | 99.4% |
| Accurate MAGPRO | <<locked>> | 94% | 49,182 psi | 77% | 2707 fps | 95.9% |
| ADI AR 2208 | <<locked>> | 80% | 48,849 psi | 77% | 2546 fps | 100% |
| ADI AR 2209 | <<locked>> | 84% | 38,696 psi | 61% | 2444 fps | 95.2% |
| ADI AR 2213 | <<locked>> | 92% | 44,773 psi | 70% | 2595 fps | 95.6% |
| ADI AR 2225 | <<locked>> | 98% | 35,462 psi | 56% | 2448 fps | 95.9% |
| Alliant Power Pro Varmint | <<locked>> | 84% | 38,812 psi | 61% | 2444 fps | 95.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 49,632 psi | 78% | 2569 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 52,895 psi | 83% | 2635 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 38,914 psi | 61% | 2470 fps | 99.5% |
| Alliant Reloder-17 | <<locked>> | 80% | 44,338 psi | 69% | 2582 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 38,435 psi | 60% | 2438 fps | 95.2% |
| Alliant Reloder-22 | <<locked>> | 88% | 38,711 psi | 61% | 2487 fps | 95.5% |
| Alliant Reloder-23 | <<locked>> | 80% | 28,631 psi | 45% | 2247 fps | 98.1% |
| Alliant Reloder-25 | <<locked>> | 86% | 30,414 psi | 48% | 2310 fps | 95.7% |
| Alliant Reloder-26 | 66 gr | 80% | 30,734 psi | 48% | 2359 fps | 96.8% |
| Bofors RP15 | <<locked>> | 90% | 38,392 psi | 60% | 2480 fps | 95.2% |
| Bofors RP3 | <<locked>> | 80% | 50,038 psi | 78% | 2579 fps | 100% |
| Bofors RP30 | <<locked>> | 98% | 40,596 psi | 64% | 2559 fps | 95.3% |
| Bofors RP5 | <<locked>> | 88% | 38,711 psi | 61% | 2487 fps | 95.5% |
| Bofors RP7 | <<locked>> | 80% | 43,801 psi | 69% | 2467 fps | 97.8% |
| Hodgdon H1000 | <<locked>> | 96% | 41,147 psi | 64% | 2520 fps | 95.3% |
| Hodgdon H380 | <<locked>> | 80% | 50,328 psi | 79% | 2595 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 42,090 psi | 66% | 2507 fps | 98% |
| Hodgdon H4350 | <<locked>> | 80% | 44,802 psi | 70% | 2520 fps | 97.4% |
| Hodgdon H4831 | <<locked>> | 90% | 44,817 psi | 70% | 2546 fps | 95% |
| Hodgdon H4831 SC | <<locked>> | 92% | 46,963 psi | 74% | 2585 fps | 95.6% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 36,550 psi | 57% | 2365 fps | 99.8% |
| Hodgdon Retumbo | <<locked>> | 94% | 38,319 psi | 60% | 2549 fps | 95.8% |
| Hodgdon Superformance | <<locked>> | 80% | 40,843 psi | 64% | 2520 fps | 97.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,514 psi | 43% | 1473 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 51,416 psi | 81% | 2575 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 53,592 psi | 84% | 2608 fps | 99.6% |
| IMR 4350 | <<locked>> | 80% | 39,349 psi | 62% | 2402 fps | 96.7% |
| IMR 4451 Enduron | <<locked>> | 80% | 45,150 psi | 71% | 2493 fps | 98.4% |
| IMR 4831 | <<locked>> | 80% | 38,595 psi | 60% | 2415 fps | 99.2% |
| IMR 4895 | <<locked>> | 80% | 54,288 psi | 85% | 2657 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 88% | 43,903 psi | 69% | 2493 fps | 95% |
| IMR 7828 SSC | <<locked>> | 92% | 42,946 psi | 67% | 2572 fps | 95.2% |
| Lovex S062 | <<locked>> | 80% | 51,692 psi | 81% | 2569 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 42,743 psi | 67% | 2451 fps | 99% |
| Lovex S070 | <<locked>> | 80% | 41,031 psi | 64% | 2434 fps | 97.9% |
| Lovex S071 | <<locked>> | 86% | 31,082 psi | 49% | 2254 fps | 95.5% |
| Norma 203B | <<locked>> | 80% | 52,257 psi | 82% | 2621 fps | 100% |
| Norma 204 | <<locked>> | 80% | 39,001 psi | 61% | 2431 fps | 95.2% |
| Norma MRP | 67.2 gr | 84% | 35,389 psi | 55% | 2441 fps | 95.8% |
| Norma URP | <<locked>> | 80% | 39,813 psi | 62% | 2454 fps | 99.3% |
| Ramshot Big Game | <<locked>> | 80% | 52,823 psi | 83% | 2644 fps | 100% |
| Ramshot Grand | <<locked>> | 92% | 42,554 psi | 67% | 2575 fps | 95.5% |
| Ramshot Hunter | <<locked>> | 80% | 38,667 psi | 61% | 2444 fps | 97.9% |
| Ramshot Magnum | <<locked>> | 92% | 37,927 psi | 59% | 2464 fps | 96% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,065 psi | 44% | 1509 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 50,096 psi | 79% | 2579 fps | 99.5% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 47,079 psi | 74% | 2628 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 39,958 psi | 63% | 2477 fps | 99.2% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 38,580 psi | 60% | 2490 fps | 98.9% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 35,085 psi | 55% | 2470 fps | 95.6% |
| Rottweil R 902 | <<locked>> | 80% | 53,519 psi | 84% | 2579 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 47,224 psi | 74% | 2533 fps | 100% |
| Rottweil R 904 | <<locked>> | 86% | 42,757 psi | 67% | 2477 fps | 95.3% |
| Rottweil R 905 | <<locked>> | 84% | 37,565 psi | 59% | 2421 fps | 95.2% |
| Rottweil R 907 | <<locked>> | 80% | 43,801 psi | 69% | 2467 fps | 97.8% |
| Shooters World Long Rifle | <<locked>> | 80% | 42,743 psi | 67% | 2451 fps | 99% |
| Shooters World Precision | <<locked>> | 80% | 51,692 psi | 81% | 2569 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 41,031 psi | 64% | 2434 fps | 97.9% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 48,428 psi | 76% | 2585 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 48,037 psi | 75% | 2431 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 41,858 psi | 66% | 2398 fps | 97.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 37,217 psi | 58% | 2418 fps | 95% |
| Somchem S355 | <<locked>> | 80% | 47,297 psi | 74% | 2530 fps | 100% |
| Somchem S361 | <<locked>> | 88% | 46,601 psi | 73% | 2523 fps | 95.5% |
| Somchem S365 | <<locked>> | 80% | 36,318 psi | 57% | 2411 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 35,882 psi | 56% | 2359 fps | 95.5% |
| Vihtavuori N135 | <<locked>> | 80% | 53,853 psi | 84% | 2536 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 53,954 psi | 85% | 2552 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 45,223 psi | 71% | 2461 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 41,263 psi | 65% | 2451 fps | 99.5% |
| Vihtavuori N165 | <<locked>> | 88% | 37,666 psi | 59% | 2392 fps | 95.7% |
| Vihtavuori N540 | <<locked>> | 80% | 52,141 psi | 82% | 2552 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 40,611 psi | 64% | 2454 fps | 99.3% |
| Vihtavuori N555 | <<locked>> | 80% | 31,937 psi | 50% | 2320 fps | 98.1% |
| Vihtavuori N560 | 72 gr | 90% | 43,859 psi | 69% | 2602 fps | 95% |
| Vihtavuori N565 | <<locked>> | 96% | 43,091 psi | 68% | 2582 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 40,103 psi | 63% | 2418 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 42,090 psi | 66% | 2507 fps | 98% |
| Winchester StaBALL HD | <<locked>> | 80% | 25,382 psi | 40% | 2234 fps | 97.5% |
| Winchester Supreme 780 | <<locked>> | 88% | 40,001 psi | 63% | 2444 fps | 95.7% |
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 90 powders for 8 x 57 PCC loaded with the .323 | 220gr | Hornady SP. Norma MRP delivers the highest muzzle velocity at 2,841 fps; across all powders the maximum-charge window runs from 1,647 fps to 2,841 fps. ADI AR 2225 gives the best case fill at 100 %, and 90 of the 90 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 57–90 %, leaving at least 10 % headroom. The 220.0 gr projectile in 0.323" calls for a 1:15.0 twist; slower twists will usually not stabilise this weight. ADI AR 2225, Alliant Reloder-22, Alliant Reloder-23 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 | Hornady SP 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.