Load Specifications
Load data in caliber 8 x 75 RS with .323 | 220gr | Woodleigh PP SN bullet and 75 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 70, Alliant Reloder-26 and Hodgdon Superformance.
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: 25.6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2495 | <<locked>> | 82% | 49,458 psi | 90% | 2454 fps | 100% |
| Accurate 2700 | <<locked>> | 82% | 47,761 psi | 87% | 2457 fps | 97.5% |
| Accurate 3100ᴾ | <<locked>> | 100% | 46,601 psi | 85% | 2536 fps | 98.9% |
| Accurate 4064 | <<locked>> | 84% | 49,632 psi | 90% | 2500 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 49,052 psi | 89% | 2585 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 84% | 47,398 psi | 86% | 2484 fps | 99.9% |
| ADI AR 2209 | <<locked>> | 96% | 47,543 psi | 86% | 2569 fps | 96.6% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 48,747 psi | 88% | 2635 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 47,587 psi | 86% | 2503 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 47,848 psi | 87% | 2520 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 47,369 psi | 86% | 2592 fps | 99.9% |
| Alliant Reloder-17 | <<locked>> | 88% | 47,674 psi | 87% | 2615 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 49,763 psi | 90% | 2612 fps | 97.3% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 46,659 psi | 85% | 2608 fps | 96.8% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 43,976 psi | 80% | 2559 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 38,580 psi | 70% | 2477 fps | 97.9% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 49,632 psi | 90% | 2726 fps | 100% |
| Bofors RP3 | <<locked>> | 84% | 47,848 psi | 87% | 2516 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 46,659 psi | 85% | 2608 fps | 96.8% |
| Bofors RP7 | <<locked>> | 88% | 47,921 psi | 87% | 2497 fps | 97.8% |
| Hodgdon H380 | <<locked>> | 84% | 48,530 psi | 88% | 2530 fps | 99.7% |
| Hodgdon H414 | <<locked>> | 90% | 48,472 psi | 88% | 2585 fps | 98.5% |
| Hodgdon H4350 | <<locked>> | 88% | 48,950 psi | 89% | 2549 fps | 97.4% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 47,253 psi | 86% | 2530 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 49,414 psi | 90% | 2566 fps | 100% |
| Hodgdon Superformance | <<locked>> | 90% | 47,892 psi | 87% | 2608 fps | 98.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,114 psi | 66% | 1578 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 47,007 psi | 85% | 2467 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 82% | 49,356 psi | 90% | 2490 fps | 98.4% |
| IMR 4350 | <<locked>> | 92% | 48,327 psi | 88% | 2526 fps | 97.9% |
| IMR 4451 Enduron | <<locked>> | 88% | 49,661 psi | 90% | 2526 fps | 98.4% |
| IMR 4831 | <<locked>> | 94% | 49,763 psi | 90% | 2582 fps | 99.9% |
| IMR 4895 | <<locked>> | 82% | 49,037 psi | 89% | 2546 fps | 100% |
| Lovex S062 | <<locked>> | 82% | 47,050 psi | 85% | 2464 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 49,385 psi | 90% | 2523 fps | 99.3% |
| Lovex S070 | <<locked>> | 90% | 47,123 psi | 86% | 2507 fps | 98.3% |
| Lovex S071ᴾ | <<locked>> | 100% | 38,740 psi | 70% | 2398 fps | 97.3% |
| Norma 203B | <<locked>> | 82% | 47,181 psi | 86% | 2510 fps | 100% |
| Norma 204 | <<locked>> | 92% | 48,428 psi | 88% | 2566 fps | 96.8% |
| Norma MRPᴾ | <<locked>> | 100% | 49,226 psi | 89% | 2684 fps | 98.6% |
| Norma URP | <<locked>> | 92% | 48,486 psi | 88% | 2575 fps | 99.8% |
| Ramshot Big Game | <<locked>> | 82% | 47,355 psi | 86% | 2533 fps | 100% |
| Ramshot Hunter | <<locked>> | 92% | 47,239 psi | 86% | 2575 fps | 98.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,666 psi | 67% | 1617 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 48,660 psi | 88% | 2513 fps | 98.8% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 47,558 psi | 86% | 2612 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 48,892 psi | 89% | 2608 fps | 99.8% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 47,935 psi | 87% | 2631 fps | 99.7% |
| Rottweil R 902 | <<locked>> | 82% | 48,863 psi | 89% | 2474 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 47,979 psi | 87% | 2513 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 49,095 psi | 89% | 2543 fps | 95.8% |
| Rottweil R 905 | <<locked>> | 98% | 48,617 psi | 88% | 2595 fps | 97.2% |
| Rottweil R 907 | <<locked>> | 88% | 47,921 psi | 87% | 2497 fps | 97.8% |
| Shooters World Long Rifle | <<locked>> | 90% | 49,385 psi | 90% | 2523 fps | 99.3% |
| Shooters World Precision | <<locked>> | 82% | 47,050 psi | 85% | 2464 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 47,123 psi | 86% | 2507 fps | 98.3% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 49,284 psi | 89% | 2566 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 46,978 psi | 85% | 2382 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 49,081 psi | 89% | 2477 fps | 98.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 48,153 psi | 87% | 2589 fps | 97.1% |
| Somchem S355 | <<locked>> | 86% | 48,385 psi | 88% | 2513 fps | 100% |
| Somchem S365 | <<locked>> | 94% | 46,833 psi | 85% | 2579 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 49,414 psi | 90% | 2575 fps | 98.1% |
| Vihtavuori N135 | <<locked>> | 82% | 49,023 psi | 89% | 2444 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 49,168 psi | 89% | 2454 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 49,443 psi | 90% | 2493 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 47,514 psi | 86% | 2526 fps | 99.7% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 45,484 psi | 83% | 2503 fps | 96.9% |
| Vihtavuori N540 | <<locked>> | 82% | 47,572 psi | 86% | 2454 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 49,617 psi | 90% | 2575 fps | 99.8% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 48,907 psi | 89% | 2628 fps | 100% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 46,978 psi | 85% | 2500 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 48,472 psi | 88% | 2585 fps | 98.5% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 39,479 psi | 72% | 2598 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 49,516 psi | 90% | 2569 fps | 97.1% |
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 2495 | <<locked>> | 80% | 46,238 psi | 84% | 2411 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 44,846 psi | 81% | 2408 fps | 96.9% |
| Accurate 3100 | <<locked>> | 90% | 33,301 psi | 60% | 2287 fps | 95.6% |
| Accurate 4064 | <<locked>> | 80% | 43,787 psi | 79% | 2415 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 32,605 psi | 59% | 2280 fps | 97.2% |
| ADI AR 2208 | <<locked>> | 80% | 41,901 psi | 76% | 2392 fps | 99.5% |
| ADI AR 2209 | <<locked>> | 92% | 41,785 psi | 76% | 2464 fps | 95% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 45,397 psi | 82% | 2579 fps | 99.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 42,018 psi | 76% | 2415 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 44,875 psi | 81% | 2470 fps | 99.8% |
| Alliant Reloder-16 | <<locked>> | 80% | 32,648 psi | 59% | 2297 fps | 97.3% |
| Alliant Reloder-17 | <<locked>> | 80% | 36,332 psi | 66% | 2405 fps | 99.5% |
| Alliant Reloder-19 | <<locked>> | 92% | 41,162 psi | 75% | 2457 fps | 95.1% |
| Alliant Reloder-22 | <<locked>> | 96% | 40,988 psi | 74% | 2500 fps | 95.2% |
| Alliant Reloder-23 | <<locked>> | 82% | 25,266 psi | 46% | 2123 fps | 95.5% |
| Alliant Reloder-25 | <<locked>> | 94% | 32,126 psi | 58% | 2323 fps | 95.3% |
| Alliant Reloder-26 | 59.4 gr | 86% | 30,400 psi | 55% | 2323 fps | 95.6% |
| Bofors RP3 | <<locked>> | 80% | 41,959 psi | 76% | 2421 fps | 100% |
| Bofors RP5 | <<locked>> | 96% | 40,988 psi | 74% | 2500 fps | 95.2% |
| Bofors RP7 | <<locked>> | 80% | 37,492 psi | 68% | 2303 fps | 95.1% |
| Hodgdon H380 | <<locked>> | 80% | 42,409 psi | 77% | 2428 fps | 98.9% |
| Hodgdon H414 | <<locked>> | 82% | 37,188 psi | 67% | 2379 fps | 95.8% |
| Hodgdon H4350 | <<locked>> | 82% | 40,480 psi | 73% | 2398 fps | 95.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 30,182 psi | 55% | 2205 fps | 98% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 46,079 psi | 84% | 2516 fps | 100% |
| Hodgdon Superformance | 59.9 gr | 84% | 38,943 psi | 71% | 2441 fps | 95.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,832 psi | 49% | 1407 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 44,063 psi | 80% | 2418 fps | 99.8% |
| IMR 4166 Enduron | <<locked>> | 80% | 46,340 psi | 84% | 2441 fps | 97.9% |
| IMR 4350 | <<locked>> | 84% | 37,724 psi | 68% | 2333 fps | 95.2% |
| IMR 4451 Enduron | <<locked>> | 80% | 38,827 psi | 70% | 2333 fps | 96% |
| IMR 4831 | <<locked>> | 80% | 31,676 psi | 57% | 2244 fps | 96.9% |
| IMR 4895 | <<locked>> | 80% | 46,021 psi | 84% | 2497 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 44,135 psi | 80% | 2418 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 36,376 psi | 66% | 2287 fps | 96.8% |
| Lovex S070 | <<locked>> | 80% | 34,635 psi | 63% | 2267 fps | 95% |
| Lovex S071 | <<locked>> | 94% | 31,908 psi | 58% | 2257 fps | 95% |
| Norma 203B | <<locked>> | 80% | 44,251 psi | 80% | 2461 fps | 99.9% |
| Norma 204 | <<locked>> | 88% | 42,308 psi | 77% | 2461 fps | 95.2% |
| Norma MRP | <<locked>> | 92% | 37,579 psi | 68% | 2464 fps | 95.6% |
| Norma URP | <<locked>> | 80% | 32,895 psi | 60% | 2283 fps | 97.1% |
| Ramshot Big Game | <<locked>> | 80% | 44,164 psi | 80% | 2480 fps | 99.9% |
| Ramshot Hunter | <<locked>> | 82% | 33,997 psi | 62% | 2316 fps | 95.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,398 psi | 50% | 1444 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 42,743 psi | 78% | 2411 fps | 97.8% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 38,653 psi | 70% | 2457 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 32,300 psi | 59% | 2297 fps | 96.7% |
| ReloadSwiss RS 70 | 54.8 gr | 80% | 32,024 psi | 58% | 2300 fps | 95.7% |
| Rottweil R 902 | <<locked>> | 80% | 46,093 psi | 84% | 2431 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 39,566 psi | 72% | 2375 fps | 99.8% |
| Rottweil R 904 | <<locked>> | 94% | 46,238 psi | 84% | 2497 fps | 95.1% |
| Rottweil R 905 | <<locked>> | 92% | 40,001 psi | 73% | 2441 fps | 95% |
| Rottweil R 907 | <<locked>> | 80% | 37,492 psi | 68% | 2303 fps | 95.1% |
| Shooters World Long Rifle | <<locked>> | 80% | 36,376 psi | 66% | 2287 fps | 96.8% |
| Shooters World Precision | <<locked>> | 80% | 44,135 psi | 80% | 2418 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 34,635 psi | 63% | 2267 fps | 95% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 40,408 psi | 73% | 2421 fps | 99.6% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 41,379 psi | 75% | 2297 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 35,491 psi | 64% | 2234 fps | 95.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 42,366 psi | 77% | 2490 fps | 95.7% |
| Somchem S355 | <<locked>> | 80% | 40,059 psi | 73% | 2372 fps | 99.8% |
| Somchem S365 | <<locked>> | 80% | 29,559 psi | 54% | 2244 fps | 99% |
| Somchem S385 | <<locked>> | 90% | 38,116 psi | 69% | 2379 fps | 95.3% |
| Vihtavuori N135 | <<locked>> | 80% | 45,876 psi | 83% | 2398 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 46,311 psi | 84% | 2415 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 38,232 psi | 69% | 2313 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 34,142 psi | 62% | 2280 fps | 97.4% |
| Vihtavuori N165 | <<locked>> | 96% | 39,885 psi | 72% | 2402 fps | 95.3% |
| Vihtavuori N540 | <<locked>> | 80% | 44,440 psi | 81% | 2408 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 33,634 psi | 61% | 2283 fps | 97% |
| Vihtavuori N555 | <<locked>> | 82% | 27,209 psi | 49% | 2192 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 33,576 psi | 61% | 2257 fps | 99% |
| Winchester 760 | <<locked>> | 82% | 37,188 psi | 67% | 2379 fps | 95.8% |
| Winchester StaBALL HD | <<locked>> | 86% | 25,179 psi | 46% | 2195 fps | 96% |
| Winchester Supreme 780 | <<locked>> | 96% | 43,033 psi | 78% | 2461 fps | 95.5% |
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 91 powders for 8 x 75 RS loaded with the .323 | 220gr | Woodleigh PP SN. Alliant Reloder-26 delivers the highest muzzle velocity at 2,726 fps; across all powders the maximum-charge window runs from 1,578 fps to 2,726 fps. Accurate 3100 gives the best case fill at 100 %, and 91 of the 91 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (380 MPa), the top charges use 66–90 %, 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, Accurate MAGPRO, ADI AR 2213 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, Alliant Reloder-26, Hodgdon Superformance rank at the top here: for 8 x 75 RS with the .323 | 220gr | Woodleigh PP SN they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate MAGPRO, Baschieri & Pellagri 109, Hodgdon H1000 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.