Load Specifications
Load data in caliber 8 x 75 RS with .323 | 250gr | Woodleigh RN SN bullet and 73 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 ReloadSwiss RS 70.
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 3100 | <<locked>> | 98% | 49,124 psi | 89% | 2418 fps | 99.8% |
| Accurate 4350 | <<locked>> | 88% | 48,124 psi | 87% | 2408 fps | 100% |
| Accurate MAGPRO | <<locked>> | 96% | 47,355 psi | 86% | 2487 fps | 96.1% |
| ADI AR 2208 | <<locked>> | 82% | 48,675 psi | 88% | 2346 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 49,139 psi | 89% | 2448 fps | 98.4% |
| ADI AR 2213 | <<locked>> | 96% | 46,934 psi | 85% | 2441 fps | 96.8% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 34,287 psi | 62% | 2254 fps | 96.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 49,255 psi | 89% | 2365 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 49,255 psi | 89% | 2461 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 49,705 psi | 90% | 2477 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 48,718 psi | 88% | 2444 fps | 98.4% |
| Alliant Reloder-22 | <<locked>> | 98% | 48,936 psi | 89% | 2493 fps | 98.6% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 49,385 psi | 90% | 2477 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 42,975 psi | 78% | 2421 fps | 99.8% |
| Alliant Reloder-26 | <<locked>> | 96% | 48,762 psi | 88% | 2549 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 47,979 psi | 87% | 2477 fps | 98.4% |
| Bofors RP3 | <<locked>> | 82% | 49,588 psi | 90% | 2375 fps | 100% |
| Bofors RP5 | <<locked>> | 98% | 48,936 psi | 89% | 2493 fps | 98.6% |
| Bofors RP7 | <<locked>> | 86% | 49,182 psi | 89% | 2365 fps | 99.1% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 42,844 psi | 78% | 2365 fps | 96.4% |
| Hodgdon H380 | <<locked>> | 82% | 49,792 psi | 90% | 2388 fps | 100% |
| Hodgdon H414 | <<locked>> | 86% | 47,195 psi | 86% | 2408 fps | 99.3% |
| Hodgdon H4350 | <<locked>> | 84% | 47,456 psi | 86% | 2375 fps | 98.4% |
| Hodgdon H4831 | <<locked>> | 94% | 47,007 psi | 85% | 2395 fps | 96.2% |
| Hodgdon H4831 SC | <<locked>> | 96% | 49,211 psi | 89% | 2428 fps | 96.7% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 49,487 psi | 90% | 2395 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 42,076 psi | 76% | 2454 fps | 97.9% |
| Hodgdon Superformance | <<locked>> | 88% | 49,661 psi | 90% | 2484 fps | 99.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,477 psi | 66% | 1483 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 46,920 psi | 85% | 2352 fps | 98.8% |
| IMR 4451 Enduron | <<locked>> | 84% | 47,732 psi | 87% | 2346 fps | 99.1% |
| IMR 4831 | <<locked>> | 90% | 48,805 psi | 89% | 2405 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 48,965 psi | 89% | 2388 fps | 96.8% |
| IMR 7828 SSC | <<locked>> | 98% | 47,790 psi | 87% | 2470 fps | 97.1% |
| Lovex S065 | <<locked>> | 86% | 47,964 psi | 87% | 2346 fps | 99.8% |
| Lovex S070 | <<locked>> | 88% | 48,762 psi | 88% | 2382 fps | 99.5% |
| Lovex S071ᴾ | <<locked>> | 100% | 43,772 psi | 79% | 2339 fps | 99.4% |
| Norma 204 | <<locked>> | 88% | 47,007 psi | 85% | 2395 fps | 97.9% |
| Norma MRP | <<locked>> | 96% | 48,298 psi | 88% | 2513 fps | 99.5% |
| Norma URP | <<locked>> | 88% | 47,384 psi | 86% | 2398 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 47,703 psi | 87% | 2480 fps | 97.5% |
| Ramshot Hunter | <<locked>> | 90% | 49,269 psi | 89% | 2448 fps | 99.8% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 45,411 psi | 82% | 2425 fps | 98.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,130 psi | 67% | 1519 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 49,443 psi | 90% | 2467 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 47,819 psi | 87% | 2431 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 49,864 psi | 90% | 2503 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 41,698 psi | 76% | 2448 fps | 98.7% |
| Rottweil R 903 | <<locked>> | 84% | 49,719 psi | 90% | 2375 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 47,964 psi | 87% | 2379 fps | 97.2% |
| Rottweil R 905 | <<locked>> | 94% | 47,776 psi | 87% | 2428 fps | 98.4% |
| Rottweil R 907 | <<locked>> | 86% | 49,182 psi | 89% | 2365 fps | 99.1% |
| Shooters World Long Rifle | <<locked>> | 86% | 47,964 psi | 87% | 2346 fps | 99.8% |
| Shooters World SW4350 | <<locked>> | 88% | 48,762 psi | 88% | 2382 fps | 99.5% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 47,718 psi | 87% | 2382 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 48,051 psi | 87% | 2238 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 47,253 psi | 86% | 2303 fps | 99.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 47,340 psi | 86% | 2425 fps | 98.3% |
| Somchem S355 | <<locked>> | 84% | 49,850 psi | 90% | 2372 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 48,936 psi | 89% | 2372 fps | 96.5% |
| Somchem S365 | <<locked>> | 92% | 49,617 psi | 90% | 2448 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 48,385 psi | 88% | 2408 fps | 99% |
| Vihtavuori N150 | <<locked>> | 84% | 47,761 psi | 87% | 2310 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 49,182 psi | 89% | 2392 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 47,543 psi | 86% | 2388 fps | 98.6% |
| Vihtavuori N550 | <<locked>> | 88% | 48,530 psi | 88% | 2402 fps | 100% |
| Vihtavuori N555 | <<locked>> | 96% | 48,631 psi | 88% | 2454 fps | 100% |
| Vihtavuori N560 | <<locked>> | 96% | 48,820 psi | 89% | 2503 fps | 97% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 44,179 psi | 80% | 2428 fps | 96.2% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 48,443 psi | 88% | 2365 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 47,442 psi | 86% | 2411 fps | 99.3% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 44,541 psi | 81% | 2539 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 47,935 psi | 87% | 2398 fps | 98.2% |
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 3100 | <<locked>> | 82% | 28,834 psi | 52% | 2047 fps | 95.5% |
| Accurate 4350 | <<locked>> | 80% | 36,709 psi | 67% | 2221 fps | 99.3% |
| Accurate MAGPRO | <<locked>> | 94% | 44,106 psi | 80% | 2434 fps | 95.2% |
| ADI AR 2208 | <<locked>> | 80% | 45,643 psi | 83% | 2300 fps | 100% |
| ADI AR 2209 | <<locked>> | 86% | 38,232 psi | 69% | 2257 fps | 95.8% |
| ADI AR 2213 | <<locked>> | 92% | 41,147 psi | 75% | 2339 fps | 95.1% |
| ADI AR 2225 | <<locked>> | 98% | 32,358 psi | 59% | 2205 fps | 95.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 46,151 psi | 84% | 2323 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 35,969 psi | 65% | 2231 fps | 99.4% |
| Alliant Reloder-17 | <<locked>> | 80% | 40,495 psi | 73% | 2333 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 35,549 psi | 65% | 2205 fps | 95% |
| Alliant Reloder-22 | <<locked>> | 88% | 35,331 psi | 64% | 2244 fps | 95.1% |
| Alliant Reloder-23 | <<locked>> | 80% | 26,324 psi | 48% | 2031 fps | 98% |
| Alliant Reloder-25 | <<locked>> | 86% | 28,021 psi | 51% | 2087 fps | 95.3% |
| Alliant Reloder-26 | 54.9 gr | 80% | 27,920 psi | 51% | 2129 fps | 96.4% |
| Bofors RP15 | <<locked>> | 92% | 37,362 psi | 68% | 2287 fps | 95.7% |
| Bofors RP3 | <<locked>> | 80% | 46,427 psi | 84% | 2333 fps | 100% |
| Bofors RP5 | <<locked>> | 88% | 35,331 psi | 64% | 2244 fps | 95.1% |
| Bofors RP7 | <<locked>> | 80% | 40,988 psi | 74% | 2231 fps | 97.6% |
| Hodgdon H1000 | <<locked>> | 98% | 40,103 psi | 73% | 2313 fps | 95.5% |
| Hodgdon H380 | <<locked>> | 80% | 46,659 psi | 85% | 2343 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 80% | 38,783 psi | 70% | 2264 fps | 97.8% |
| Hodgdon H4350 | <<locked>> | 80% | 41,756 psi | 76% | 2277 fps | 97.2% |
| Hodgdon H4831 | <<locked>> | 92% | 44,019 psi | 80% | 2346 fps | 95.4% |
| Hodgdon H4831 SC | <<locked>> | 92% | 43,149 psi | 78% | 2329 fps | 95.1% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 33,562 psi | 61% | 2139 fps | 99.7% |
| Hodgdon Retumbo | <<locked>> | 94% | 34,983 psi | 63% | 2297 fps | 95.1% |
| Hodgdon Superformance | <<locked>> | 80% | 37,579 psi | 68% | 2277 fps | 97.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,282 psi | 50% | 1322 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 36,709 psi | 67% | 2175 fps | 96.5% |
| IMR 4451 Enduron | <<locked>> | 80% | 42,293 psi | 77% | 2254 fps | 98.3% |
| IMR 4831 | <<locked>> | 80% | 35,404 psi | 64% | 2182 fps | 99.1% |
| IMR 4955 Enduron | <<locked>> | 90% | 43,323 psi | 79% | 2300 fps | 95.4% |
| IMR 7828 SSC | <<locked>> | 94% | 41,887 psi | 76% | 2365 fps | 95.5% |
| Lovex S065 | <<locked>> | 80% | 39,842 psi | 72% | 2215 fps | 98.9% |
| Lovex S070 | <<locked>> | 80% | 38,130 psi | 69% | 2201 fps | 97.7% |
| Lovex S071 | <<locked>> | 86% | 28,210 psi | 51% | 2034 fps | 95.2% |
| Norma 204 | <<locked>> | 82% | 38,392 psi | 70% | 2244 fps | 95.7% |
| Norma MRP | 55.9 gr | 84% | 32,300 psi | 59% | 2205 fps | 95.5% |
| Norma URP | <<locked>> | 80% | 36,680 psi | 67% | 2218 fps | 99.2% |
| Ramshot Grand | <<locked>> | 94% | 41,626 psi | 76% | 2372 fps | 95.8% |
| Ramshot Hunter | <<locked>> | 80% | 35,447 psi | 64% | 2208 fps | 97.7% |
| Ramshot Magnum | <<locked>> | 92% | 34,272 psi | 62% | 2215 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,717 psi | 50% | 1355 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 43,033 psi | 78% | 2375 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 36,477 psi | 66% | 2241 fps | 99.1% |
| ReloadSwiss RS 70 | 54.4 gr | 80% | 35,505 psi | 64% | 2251 fps | 98.7% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 34,069 psi | 62% | 2280 fps | 96% |
| Rottweil R 903 | <<locked>> | 80% | 43,787 psi | 79% | 2290 fps | 100% |
| Rottweil R 904 | <<locked>> | 86% | 39,668 psi | 72% | 2238 fps | 95% |
| Rottweil R 905 | <<locked>> | 86% | 36,709 psi | 67% | 2234 fps | 95.7% |
| Rottweil R 907 | <<locked>> | 80% | 40,988 psi | 74% | 2231 fps | 97.6% |
| Shooters World Long Rifle | <<locked>> | 80% | 39,842 psi | 72% | 2215 fps | 98.9% |
| Shooters World SW4350 | <<locked>> | 80% | 38,130 psi | 69% | 2201 fps | 97.7% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 44,744 psi | 81% | 2336 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 45,237 psi | 82% | 2198 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 38,914 psi | 71% | 2165 fps | 97.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 36,361 psi | 66% | 2231 fps | 95.5% |
| Somchem S355 | <<locked>> | 80% | 44,048 psi | 80% | 2287 fps | 100% |
| Somchem S361 | <<locked>> | 88% | 42,989 psi | 78% | 2277 fps | 95% |
| Somchem S365 | <<locked>> | 80% | 33,185 psi | 60% | 2185 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 32,909 psi | 60% | 2133 fps | 95.2% |
| Vihtavuori N150 | <<locked>> | 80% | 42,105 psi | 76% | 2228 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 37,956 psi | 69% | 2211 fps | 99.3% |
| Vihtavuori N165 | <<locked>> | 88% | 34,403 psi | 62% | 2159 fps | 95.3% |
| Vihtavuori N550 | <<locked>> | 80% | 37,391 psi | 68% | 2218 fps | 99.1% |
| Vihtavuori N555 | <<locked>> | 80% | 28,863 psi | 52% | 2093 fps | 97.9% |
| Vihtavuori N560 | <<locked>> | 92% | 42,685 psi | 77% | 2398 fps | 95.4% |
| Vihtavuori N565 | <<locked>> | 98% | 41,321 psi | 75% | 2379 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 37,014 psi | 67% | 2188 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 38,783 psi | 70% | 2264 fps | 97.8% |
| Winchester StaBALL HD | <<locked>> | 80% | 23,235 psi | 42% | 2018 fps | 97.2% |
| Winchester Supreme 780 | <<locked>> | 88% | 36,637 psi | 66% | 2205 fps | 95.3% |
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 79 powders for 8 x 75 RS loaded with the .323 | 250gr | Woodleigh RN SN. Alliant Reloder-26 delivers the highest muzzle velocity at 2,549 fps; across all powders the maximum-charge window runs from 1,483 fps to 2,549 fps. ADI AR 2217 gives the best case fill at 100 %, and 79 of the 79 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (380 MPa), the top charges use 54–90 %, leaving at least 10 % headroom. The 250.0 gr projectile in 0.323" calls for a 1:14.5 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2225, 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, ReloadSwiss RS 70 rank at the top here: for 8 x 75 RS with the .323 | 250gr | Woodleigh RN SN they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AR 2217, Baschieri & Pellagri 109, Norma 217 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.