Load Specifications
Load data in caliber 8 x 75 RS with .323 | 220gr | Swift A-Frame 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 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.
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Max Load - Barrel Length: 25.6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2495 | <<locked>> | 82% | 49,342 psi | 90% | 2454 fps | 100% |
| Accurate 2700 | <<locked>> | 82% | 47,848 psi | 87% | 2457 fps | 97.5% |
| Accurate 3100ᴾ | <<locked>> | 100% | 46,702 psi | 85% | 2539 fps | 98.9% |
| Accurate 4064 | <<locked>> | 84% | 49,734 psi | 90% | 2503 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 49,197 psi | 89% | 2589 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 84% | 47,500 psi | 86% | 2487 fps | 99.9% |
| ADI AR 2209 | <<locked>> | 96% | 47,645 psi | 86% | 2572 fps | 96.7% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 48,617 psi | 88% | 2631 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 47,703 psi | 87% | 2507 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 47,993 psi | 87% | 2523 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 47,485 psi | 86% | 2595 fps | 99.9% |
| Alliant Reloder-17 | <<locked>> | 88% | 47,805 psi | 87% | 2615 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 46,775 psi | 85% | 2562 fps | 96.7% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 46,746 psi | 85% | 2612 fps | 96.9% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 44,077 psi | 80% | 2559 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 38,609 psi | 70% | 2477 fps | 97.9% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 49,719 psi | 90% | 2730 fps | 100% |
| Bofors RP3 | <<locked>> | 84% | 47,993 psi | 87% | 2520 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 46,746 psi | 85% | 2612 fps | 96.9% |
| Bofors RP7 | <<locked>> | 88% | 48,051 psi | 87% | 2500 fps | 97.8% |
| Hodgdon H380 | <<locked>> | 84% | 48,646 psi | 88% | 2533 fps | 99.7% |
| Hodgdon H414 | <<locked>> | 90% | 48,588 psi | 88% | 2589 fps | 98.5% |
| Hodgdon H4350 | <<locked>> | 88% | 49,081 psi | 89% | 2549 fps | 97.4% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 47,181 psi | 86% | 2526 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 49,284 psi | 89% | 2566 fps | 100% |
| Hodgdon Superformance | <<locked>> | 90% | 47,993 psi | 87% | 2612 fps | 98.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,056 psi | 65% | 1578 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 46,891 psi | 85% | 2467 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 82% | 49,458 psi | 90% | 2493 fps | 98.5% |
| IMR 4350 | <<locked>> | 92% | 48,428 psi | 88% | 2526 fps | 97.9% |
| IMR 4451 Enduron | <<locked>> | 88% | 49,763 psi | 90% | 2526 fps | 98.5% |
| IMR 4831 | <<locked>> | 92% | 46,717 psi | 85% | 2536 fps | 99.8% |
| IMR 4895 | <<locked>> | 82% | 49,182 psi | 89% | 2549 fps | 100% |
| Lovex S062 | <<locked>> | 82% | 47,166 psi | 86% | 2467 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 49,458 psi | 90% | 2523 fps | 99.3% |
| Lovex S070 | <<locked>> | 90% | 47,253 psi | 86% | 2510 fps | 98.4% |
| Lovex S071ᴾ | <<locked>> | 100% | 38,856 psi | 71% | 2402 fps | 97.3% |
| Norma 203B | <<locked>> | 82% | 47,297 psi | 86% | 2510 fps | 100% |
| Norma 204 | <<locked>> | 92% | 48,544 psi | 88% | 2569 fps | 96.8% |
| Norma MRPᴾ | <<locked>> | 100% | 49,327 psi | 90% | 2687 fps | 98.7% |
| Norma URP | <<locked>> | 92% | 48,617 psi | 88% | 2579 fps | 99.8% |
| Ramshot Big Game | <<locked>> | 82% | 47,224 psi | 86% | 2530 fps | 100% |
| Ramshot Hunter | <<locked>> | 92% | 47,355 psi | 86% | 2575 fps | 98.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,593 psi | 66% | 1614 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 48,791 psi | 89% | 2516 fps | 98.8% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 47,616 psi | 86% | 2612 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 48,979 psi | 89% | 2612 fps | 99.8% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 47,964 psi | 87% | 2631 fps | 99.7% |
| Rottweil R 902 | <<locked>> | 82% | 49,008 psi | 89% | 2477 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 48,095 psi | 87% | 2516 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 49,211 psi | 89% | 2546 fps | 95.8% |
| Rottweil R 905 | <<locked>> | 98% | 48,718 psi | 88% | 2598 fps | 97.3% |
| Rottweil R 907 | <<locked>> | 88% | 48,051 psi | 87% | 2500 fps | 97.8% |
| Shooters World Long Rifle | <<locked>> | 90% | 49,458 psi | 90% | 2523 fps | 99.3% |
| Shooters World Precision | <<locked>> | 82% | 47,166 psi | 86% | 2467 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 47,253 psi | 86% | 2510 fps | 98.4% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 49,371 psi | 90% | 2569 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 46,862 psi | 85% | 2379 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 49,168 psi | 89% | 2480 fps | 98.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 48,254 psi | 88% | 2592 fps | 97.2% |
| Somchem S355 | <<locked>> | 86% | 48,457 psi | 88% | 2513 fps | 100% |
| Somchem S365 | <<locked>> | 94% | 46,934 psi | 85% | 2582 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 49,516 psi | 90% | 2579 fps | 98.1% |
| Vihtavuori N135 | <<locked>> | 82% | 48,892 psi | 89% | 2441 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 49,255 psi | 89% | 2457 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 49,298 psi | 89% | 2490 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 47,369 psi | 86% | 2523 fps | 99.7% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 45,513 psi | 83% | 2503 fps | 96.9% |
| Vihtavuori N540 | <<locked>> | 82% | 47,471 psi | 86% | 2454 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 49,734 psi | 90% | 2579 fps | 99.8% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 48,965 psi | 89% | 2628 fps | 100% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 47,065 psi | 85% | 2503 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 48,588 psi | 88% | 2589 fps | 98.5% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 39,552 psi | 72% | 2598 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 49,603 psi | 90% | 2572 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% | 46,398 psi | 84% | 2411 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 44,715 psi | 81% | 2405 fps | 96.8% |
| Accurate 3100 | <<locked>> | 90% | 33,199 psi | 60% | 2287 fps | 95.5% |
| Accurate 4064 | <<locked>> | 80% | 43,903 psi | 80% | 2418 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 32,692 psi | 59% | 2283 fps | 97.2% |
| ADI AR 2208 | <<locked>> | 80% | 42,032 psi | 76% | 2392 fps | 99.5% |
| ADI AR 2209 | <<locked>> | 92% | 41,887 psi | 76% | 2467 fps | 95.1% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 45,527 psi | 83% | 2582 fps | 99.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 42,134 psi | 76% | 2415 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 44,991 psi | 82% | 2474 fps | 99.8% |
| Alliant Reloder-16 | <<locked>> | 80% | 32,721 psi | 59% | 2297 fps | 97.4% |
| Alliant Reloder-17 | 54 gr | 80% | 36,448 psi | 66% | 2408 fps | 99.6% |
| Alliant Reloder-19 | <<locked>> | 92% | 41,263 psi | 75% | 2461 fps | 95.1% |
| Alliant Reloder-22 | <<locked>> | 96% | 41,089 psi | 75% | 2507 fps | 95.3% |
| Alliant Reloder-23 | <<locked>> | 82% | 25,208 psi | 46% | 2119 fps | 95.4% |
| Alliant Reloder-25 | <<locked>> | 94% | 32,198 psi | 58% | 2323 fps | 95.3% |
| Alliant Reloder-26 | 59.5 gr | 86% | 30,429 psi | 55% | 2326 fps | 95.6% |
| Bofors RP3 | <<locked>> | 80% | 42,076 psi | 76% | 2425 fps | 100% |
| Bofors RP5 | <<locked>> | 96% | 41,089 psi | 75% | 2507 fps | 95.3% |
| Bofors RP7 | <<locked>> | 80% | 37,565 psi | 68% | 2306 fps | 95.1% |
| Hodgdon H380 | <<locked>> | 80% | 42,525 psi | 77% | 2428 fps | 99% |
| Hodgdon H414 | <<locked>> | 82% | 37,304 psi | 68% | 2379 fps | 95.8% |
| Hodgdon H4350 | <<locked>> | 82% | 40,553 psi | 74% | 2398 fps | 95.3% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 30,095 psi | 55% | 2201 fps | 98% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 46,166 psi | 84% | 2516 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 39,015 psi | 71% | 2444 fps | 95.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,992 psi | 49% | 1411 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 44,150 psi | 80% | 2421 fps | 99.8% |
| IMR 4166 Enduron | <<locked>> | 80% | 46,441 psi | 84% | 2444 fps | 98% |
| IMR 4350 | <<locked>> | 84% | 37,811 psi | 69% | 2333 fps | 95.2% |
| IMR 4451 Enduron | <<locked>> | 80% | 38,943 psi | 71% | 2333 fps | 96% |
| IMR 4831 | <<locked>> | 80% | 31,778 psi | 58% | 2247 fps | 96.9% |
| IMR 4895 | <<locked>> | 80% | 46,108 psi | 84% | 2500 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 44,251 psi | 80% | 2421 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 36,448 psi | 66% | 2290 fps | 96.9% |
| Lovex S070 | <<locked>> | 80% | 34,577 psi | 63% | 2267 fps | 95% |
| Lovex S071 | <<locked>> | 94% | 31,995 psi | 58% | 2260 fps | 95% |
| Norma 203B | <<locked>> | 80% | 44,338 psi | 80% | 2464 fps | 99.9% |
| Norma 204 | <<locked>> | 88% | 42,409 psi | 77% | 2461 fps | 95.2% |
| Norma MRP | <<locked>> | 92% | 37,666 psi | 68% | 2464 fps | 95.7% |
| Norma URP | <<locked>> | 80% | 32,837 psi | 60% | 2283 fps | 97.1% |
| Ramshot Big Game | <<locked>> | 80% | 44,295 psi | 80% | 2484 fps | 99.9% |
| Ramshot Hunter | <<locked>> | 82% | 34,113 psi | 62% | 2320 fps | 95.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,354 psi | 50% | 1444 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 42,815 psi | 78% | 2415 fps | 97.8% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 38,783 psi | 70% | 2461 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 32,416 psi | 59% | 2303 fps | 96.7% |
| ReloadSwiss RS 70 | 54.9 gr | 80% | 32,126 psi | 58% | 2303 fps | 95.8% |
| Rottweil R 902 | <<locked>> | 80% | 46,195 psi | 84% | 2434 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 39,450 psi | 72% | 2372 fps | 99.8% |
| Rottweil R 904 | <<locked>> | 94% | 46,354 psi | 84% | 2500 fps | 95.1% |
| Rottweil R 905 | <<locked>> | 92% | 40,118 psi | 73% | 2444 fps | 95% |
| Rottweil R 907 | <<locked>> | 80% | 37,565 psi | 68% | 2306 fps | 95.1% |
| Shooters World Long Rifle | <<locked>> | 80% | 36,448 psi | 66% | 2290 fps | 96.9% |
| Shooters World Precision | <<locked>> | 80% | 44,251 psi | 80% | 2421 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 34,577 psi | 63% | 2267 fps | 95% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 40,509 psi | 74% | 2425 fps | 99.6% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 41,524 psi | 75% | 2300 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 35,563 psi | 65% | 2234 fps | 95.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 42,438 psi | 77% | 2490 fps | 95.7% |
| Somchem S355 | <<locked>> | 80% | 40,190 psi | 73% | 2375 fps | 99.8% |
| Somchem S365 | <<locked>> | 80% | 29,486 psi | 54% | 2244 fps | 99% |
| Somchem S385 | <<locked>> | 90% | 38,232 psi | 69% | 2382 fps | 95.4% |
| Vihtavuori N135 | <<locked>> | 80% | 45,977 psi | 83% | 2402 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 46,195 psi | 84% | 2411 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 38,159 psi | 69% | 2313 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 34,258 psi | 62% | 2283 fps | 97.5% |
| Vihtavuori N165 | <<locked>> | 96% | 39,972 psi | 73% | 2405 fps | 95.4% |
| Vihtavuori N540 | <<locked>> | 80% | 44,570 psi | 81% | 2411 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 33,707 psi | 61% | 2283 fps | 97.1% |
| Vihtavuori N555 | <<locked>> | 82% | 27,311 psi | 50% | 2192 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 33,663 psi | 61% | 2260 fps | 99.1% |
| Winchester 760 | <<locked>> | 82% | 37,304 psi | 68% | 2379 fps | 95.8% |
| Winchester StaBALL HD | <<locked>> | 86% | 25,237 psi | 46% | 2198 fps | 96.1% |
| Winchester Supreme 780 | <<locked>> | 96% | 43,134 psi | 78% | 2464 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 75 powders for 8 x 75 RS loaded with the .323 | 220gr | Swift A-Frame. Alliant Reloder-26 delivers the highest muzzle velocity at 2,730 fps; across all powders the maximum-charge window runs from 1,578 fps to 2,730 fps. Accurate 3100 gives the best case fill at 100 %, and 75 of the 75 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (380 MPa), the top charges use 65–90 %, 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, 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. ReloadSwiss RS 70, Alliant Reloder-26, Alliant Reloder-17 rank at the top here: for 8 x 75 RS 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.