Load Specifications
Bullet Manufacturer:Barnes
Bullet Weight:220 gr
Bullet Diameter:0.323"
Bullet Length:<<locked>>
Caliber:8 x 75 S load data
Case Length (l3):2.941"
Cartridge Length (C.O.L.):<<locked>>
Case Capacity:81 Grains of Water
Primer Size:Large Rifle (LR)
Barrel Length:25.6"
Max. allowed Pressure:63,817 psi
Recommended Twist Rate:1:13.5
Load data in caliber 8 x 75 S with .323 | 220gr | Barnes Solid RN bullet and 107 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 70, Hodgdon Superformance 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.
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: 25.6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 82% | 56,144 psi | 88% | 2493 fps | 100% |
| Accurate 2495 | <<locked>> | 86% | 55,332 psi | 87% | 2523 fps | 100% |
| Accurate 2520 | <<locked>> | 82% | 56,753 psi | 89% | 2585 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 57,392 psi | 90% | 2589 fps | 98.9% |
| Accurate 3100ᴾ | <<locked>> | 100% | 45,847 psi | 72% | 2520 fps | 98.7% |
| Accurate 4064 | <<locked>> | 88% | 55,593 psi | 87% | 2575 fps | 100% |
| Accurate 4350 | <<locked>> | 96% | 55,637 psi | 87% | 2674 fps | 100% |
| ADI AR 2206H | <<locked>> | 84% | 55,187 psi | 86% | 2602 fps | 100% |
| ADI AR 2208 | <<locked>> | 90% | 56,333 psi | 88% | 2608 fps | 100% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 53,461 psi | 84% | 2657 fps | 97.7% |
| ADI Benchmark 8208 | <<locked>> | 84% | 57,479 psi | 90% | 2595 fps | 100% |
| Alliant AR-Comp | <<locked>> | 82% | 55,593 psi | 87% | 2520 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 55,158 psi | 86% | 2723 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 90% | 56,594 psi | 89% | 2625 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 88% | 57,145 psi | 90% | 2648 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 98% | 56,347 psi | 88% | 2720 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 92% | 54,041 psi | 85% | 2700 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 52,286 psi | 82% | 2644 fps | 97.7% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 45,948 psi | 72% | 2589 fps | 96.5% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 43,250 psi | 68% | 2543 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 38,145 psi | 60% | 2461 fps | 97.6% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 48,907 psi | 77% | 2710 fps | 99.9% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 54,998 psi | 86% | 2621 fps | 100% |
| Bofors RP3 | <<locked>> | 90% | 57,537 psi | 90% | 2644 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 45,948 psi | 72% | 2589 fps | 96.5% |
| Bofors RP7 | <<locked>> | 94% | 57,116 psi | 90% | 2628 fps | 99% |
| Hodgdon Benchmark | <<locked>> | 82% | 55,680 psi | 87% | 2533 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 84% | 57,261 psi | 90% | 2631 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 54,534 psi | 85% | 2612 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 94% | 54,578 psi | 86% | 2674 fps | 99.2% |
| Hodgdon H4350 | <<locked>> | 92% | 54,984 psi | 86% | 2635 fps | 98.3% |
| Hodgdon H4895 | <<locked>> | 84% | 55,753 psi | 87% | 2608 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 56,362 psi | 88% | 2644 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 55,448 psi | 87% | 2644 fps | 100% |
| Hodgdon Superformance | <<locked>> | 94% | 54,650 psi | 86% | 2707 fps | 99% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,984 psi | 56% | 1572 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 56,869 psi | 89% | 2612 fps | 100% |
| IMR 3031 | <<locked>> | 84% | 56,115 psi | 88% | 2585 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 55,724 psi | 87% | 2589 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 86% | 55,288 psi | 87% | 2575 fps | 99.1% |
| IMR 4350 | <<locked>> | 98% | 57,566 psi | 90% | 2654 fps | 99.1% |
| IMR 4451 Enduron | <<locked>> | 92% | 55,347 psi | 87% | 2605 fps | 99.1% |
| IMR 4831 | <<locked>> | 98% | 55,825 psi | 87% | 2661 fps | 100% |
| IMR 4895 | <<locked>> | 86% | 54,998 psi | 86% | 2628 fps | 100% |
| IMR 4955 Enduronᴾ | <<locked>> | 100% | 53,214 psi | 83% | 2592 fps | 95.9% |
| IMR 8208 XBR | <<locked>> | 84% | 57,479 psi | 90% | 2595 fps | 100% |
| Lovex D073.6 | <<locked>> | 84% | 55,405 psi | 87% | 2579 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 54,534 psi | 85% | 2533 fps | 100% |
| Lovex S062 | <<locked>> | 88% | 55,941 psi | 88% | 2585 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 55,071 psi | 86% | 2602 fps | 99.8% |
| Lovex S070 | <<locked>> | 96% | 56,072 psi | 88% | 2638 fps | 99.4% |
| Lovex S071ᴾ | <<locked>> | 100% | 38,232 psi | 60% | 2385 fps | 97.1% |
| Norma 201 | <<locked>> | 86% | 57,392 psi | 90% | 2592 fps | 100% |
| Norma 202 | <<locked>> | 84% | 54,708 psi | 86% | 2549 fps | 100% |
| Norma 203B | <<locked>> | 88% | 56,347 psi | 88% | 2635 fps | 100% |
| Norma 204 | <<locked>> | 96% | 54,694 psi | 86% | 2657 fps | 97.8% |
| Norma MRPᴾ | <<locked>> | 100% | 48,559 psi | 76% | 2667 fps | 98.4% |
| Norma URP | <<locked>> | 96% | 54,360 psi | 85% | 2657 fps | 100% |
| Ramshot Big Game | <<locked>> | 88% | 56,942 psi | 89% | 2661 fps | 100% |
| Ramshot Hunter | <<locked>> | 98% | 56,739 psi | 89% | 2710 fps | 99.8% |
| Ramshot TAC | <<locked>> | 82% | 54,288 psi | 85% | 2582 fps | 99.8% |
| Ramshot Wild Boar | <<locked>> | 84% | 57,653 psi | 90% | 2641 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,535 psi | 57% | 1608 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 54,549 psi | 85% | 2595 fps | 99.4% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 54,288 psi | 85% | 2664 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 92% | 57,551 psi | 90% | 2743 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 55,201 psi | 87% | 2694 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 54,056 psi | 85% | 2720 fps | 100% |
| Rottweil R 901 | <<locked>> | 82% | 55,143 psi | 86% | 2526 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 54,752 psi | 86% | 2552 fps | 100% |
| Rottweil R 903 | <<locked>> | 92% | 57,377 psi | 90% | 2635 fps | 100% |
| Rottweil R 904ᴾ | <<locked>> | 100% | 55,129 psi | 86% | 2628 fps | 96.9% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 51,155 psi | 80% | 2628 fps | 97.7% |
| Rottweil R 907 | <<locked>> | 94% | 57,116 psi | 90% | 2628 fps | 99% |
| Shooters World Long Rifle | <<locked>> | 94% | 55,071 psi | 86% | 2602 fps | 99.8% |
| Shooters World Match Rifle | <<locked>> | 84% | 55,405 psi | 87% | 2579 fps | 100% |
| Shooters World Precision | <<locked>> | 88% | 55,941 psi | 88% | 2585 fps | 100% |
| Shooters World SW4350 | <<locked>> | 96% | 56,072 psi | 88% | 2638 fps | 99.4% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 55,332 psi | 87% | 2648 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 56,376 psi | 88% | 2608 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 57,188 psi | 90% | 2625 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 55,158 psi | 86% | 2484 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 55,550 psi | 87% | 2487 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 55,013 psi | 86% | 2556 fps | 99.1% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 50,662 psi | 79% | 2625 fps | 97.5% |
| Somchem S335 | <<locked>> | 84% | 54,824 psi | 86% | 2487 fps | 100% |
| Somchem S341 | <<locked>> | 84% | 56,057 psi | 88% | 2598 fps | 100% |
| Somchem S355 | <<locked>> | 92% | 57,566 psi | 90% | 2635 fps | 100% |
| Somchem S361ᴾ | <<locked>> | 100% | 56,927 psi | 89% | 2625 fps | 96.4% |
| Somchem S365ᴾ | <<locked>> | 100% | 56,492 psi | 89% | 2703 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 51,953 psi | 81% | 2612 fps | 98.4% |
| Vihtavuori N133 | <<locked>> | 84% | 55,535 psi | 87% | 2467 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 54,578 psi | 86% | 2510 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 55,114 psi | 86% | 2526 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 55,376 psi | 87% | 2566 fps | 100% |
| Vihtavuori N160 | <<locked>> | 96% | 56,855 psi | 89% | 2651 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 44,773 psi | 70% | 2484 fps | 96.6% |
| Vihtavuori N530 | <<locked>> | 82% | 54,433 psi | 85% | 2549 fps | 100% |
| Vihtavuori N540 | <<locked>> | 88% | 56,739 psi | 89% | 2572 fps | 100% |
| Vihtavuori N550 | <<locked>> | 96% | 55,767 psi | 87% | 2661 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 48,298 psi | 76% | 2612 fps | 100% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 56,666 psi | 89% | 2625 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 54,795 psi | 86% | 2598 fps | 100% |
| Winchester 760 | <<locked>> | 94% | 54,578 psi | 86% | 2674 fps | 99.2% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 38,899 psi | 61% | 2579 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 86% | 57,246 psi | 90% | 2635 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 48,820 psi | 77% | 2552 fps | 96.8% |
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 2015 | <<locked>> | 80% | 52,881 psi | 83% | 2454 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 45,716 psi | 72% | 2398 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 53,200 psi | 83% | 2543 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 44,280 psi | 69% | 2392 fps | 96.6% |
| Accurate 3100 | <<locked>> | 90% | 32,793 psi | 51% | 2274 fps | 95.2% |
| Accurate 4064 | <<locked>> | 80% | 43,294 psi | 68% | 2405 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 32,140 psi | 50% | 2267 fps | 96.9% |
| ADI AR 2206H | <<locked>> | 80% | 48,805 psi | 76% | 2510 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 41,481 psi | 65% | 2379 fps | 99.4% |
| ADI AR 2209 | <<locked>> | 94% | 44,092 psi | 69% | 2503 fps | 95.6% |
| ADI Benchmark 8208 | <<locked>> | 80% | 50,879 psi | 80% | 2507 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 51,938 psi | 81% | 2477 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 44,744 psi | 70% | 2562 fps | 99.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 41,568 psi | 65% | 2402 fps | 99.9% |
| Alliant Reloder-15 | <<locked>> | 80% | 44,425 psi | 70% | 2461 fps | 99.7% |
| Alliant Reloder-16 | <<locked>> | 80% | 32,285 psi | 51% | 2280 fps | 97.1% |
| Alliant Reloder-17 | 53.3 gr | 80% | 35,998 psi | 56% | 2395 fps | 99.4% |
| Alliant Reloder-19 | <<locked>> | 94% | 43,366 psi | 68% | 2493 fps | 95.6% |
| Alliant Reloder-22 | <<locked>> | 98% | 43,047 psi | 67% | 2536 fps | 95.7% |
| Alliant Reloder-23 | <<locked>> | 82% | 24,860 psi | 39% | 2106 fps | 95.1% |
| Alliant Reloder-25 | <<locked>> | 96% | 33,649 psi | 53% | 2356 fps | 95.9% |
| Alliant Reloder-26 | <<locked>> | 86% | 29,965 psi | 47% | 2306 fps | 95.2% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 48,269 psi | 76% | 2523 fps | 99.8% |
| Bofors RP3 | <<locked>> | 80% | 41,510 psi | 65% | 2411 fps | 100% |
| Bofors RP5 | <<locked>> | 98% | 43,047 psi | 67% | 2536 fps | 95.7% |
| Bofors RP7 | <<locked>> | 82% | 39,407 psi | 62% | 2336 fps | 95.6% |
| Hodgdon Benchmark | <<locked>> | 80% | 52,272 psi | 82% | 2487 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 50,154 psi | 79% | 2536 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 42,003 psi | 66% | 2415 fps | 98.8% |
| Hodgdon H414 | <<locked>> | 82% | 36,579 psi | 57% | 2362 fps | 95.5% |
| Hodgdon H4350 | <<locked>> | 84% | 42,540 psi | 67% | 2431 fps | 95.7% |
| Hodgdon H4895 | <<locked>> | 80% | 49,284 psi | 77% | 2520 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 29,617 psi | 46% | 2185 fps | 97.7% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 45,600 psi | 71% | 2503 fps | 100% |
| Hodgdon Superformance | 59.1 gr | 84% | 38,305 psi | 60% | 2425 fps | 95.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,818 psi | 42% | 1401 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 47,108 psi | 74% | 2474 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 49,516 psi | 78% | 2500 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 43,598 psi | 68% | 2408 fps | 99.7% |
| IMR 4166 Enduron | <<locked>> | 80% | 45,963 psi | 72% | 2431 fps | 97.8% |
| IMR 4350 | <<locked>> | 86% | 39,668 psi | 62% | 2365 fps | 95.7% |
| IMR 4451 Enduron | <<locked>> | 80% | 38,464 psi | 60% | 2320 fps | 95.8% |
| IMR 4831 | <<locked>> | 80% | 31,270 psi | 49% | 2231 fps | 96.7% |
| IMR 4895 | <<locked>> | 80% | 45,513 psi | 71% | 2487 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 98% | 49,893 psi | 78% | 2543 fps | 95.2% |
| IMR 8208 XBR | <<locked>> | 80% | 50,879 psi | 80% | 2507 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 48,602 psi | 76% | 2490 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 48,298 psi | 76% | 2444 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 43,642 psi | 68% | 2405 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 35,984 psi | 56% | 2274 fps | 96.6% |
| Lovex S070 | <<locked>> | 82% | 36,361 psi | 57% | 2300 fps | 95.5% |
| Lovex S071 | <<locked>> | 96% | 33,634 psi | 53% | 2293 fps | 95.6% |
| Norma 201 | <<locked>> | 80% | 47,790 psi | 75% | 2461 fps | 100% |
| Norma 202 | <<locked>> | 80% | 48,298 psi | 76% | 2464 fps | 100% |
| Norma 203B | <<locked>> | 80% | 43,772 psi | 69% | 2448 fps | 99.9% |
| Norma 204 | <<locked>> | 90% | 44,643 psi | 70% | 2497 fps | 95.7% |
| Norma MRP | <<locked>> | 92% | 37,144 psi | 58% | 2448 fps | 95.4% |
| Norma URP | <<locked>> | 80% | 32,474 psi | 51% | 2270 fps | 96.9% |
| Ramshot Big Game | <<locked>> | 80% | 43,526 psi | 68% | 2467 fps | 99.8% |
| Ramshot Hunter | <<locked>> | 82% | 33,707 psi | 53% | 2306 fps | 95.3% |
| Ramshot TAC | <<locked>> | 80% | 50,763 psi | 80% | 2530 fps | 99.5% |
| Ramshot Wild Boar | <<locked>> | 80% | 50,604 psi | 79% | 2546 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,383 psi | 43% | 1440 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 42,119 psi | 66% | 2395 fps | 97.6% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 47,427 psi | 74% | 2562 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 38,276 psi | 60% | 2448 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 31,763 psi | 50% | 2283 fps | 96.4% |
| ReloadSwiss RS 70 | 54.1 gr | 80% | 31,575 psi | 49% | 2283 fps | 95.4% |
| Rottweil R 901 | <<locked>> | 80% | 52,011 psi | 82% | 2487 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 45,614 psi | 71% | 2421 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 39,088 psi | 61% | 2362 fps | 99.7% |
| Rottweil R 904 | <<locked>> | 96% | 48,573 psi | 76% | 2530 fps | 95.6% |
| Rottweil R 905 | <<locked>> | 94% | 42,018 psi | 66% | 2477 fps | 95.5% |
| Rottweil R 907 | <<locked>> | 82% | 39,407 psi | 62% | 2336 fps | 95.6% |
| Shooters World Long Rifle | <<locked>> | 80% | 35,984 psi | 56% | 2274 fps | 96.6% |
| Shooters World Match Rifle | <<locked>> | 80% | 48,602 psi | 76% | 2490 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 43,642 psi | 68% | 2405 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 36,361 psi | 57% | 2300 fps | 95.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 40,016 psi | 63% | 2408 fps | 99.5% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 49,327 psi | 77% | 2510 fps | 99.6% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 47,340 psi | 74% | 2487 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 48,805 psi | 76% | 2402 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 40,944 psi | 64% | 2287 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 37,521 psi | 59% | 2270 fps | 95.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 41,626 psi | 65% | 2470 fps | 95.4% |
| Somchem S335 | <<locked>> | 80% | 48,602 psi | 76% | 2405 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 49,139 psi | 77% | 2503 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 39,610 psi | 62% | 2359 fps | 99.7% |
| Somchem S361 | <<locked>> | 98% | 53,403 psi | 84% | 2575 fps | 95.7% |
| Somchem S365 | <<locked>> | 80% | 29,022 psi | 45% | 2228 fps | 98.8% |
| Somchem S385 | <<locked>> | 90% | 37,623 psi | 59% | 2365 fps | 95% |
| Vihtavuori N133 | <<locked>> | 80% | 49,255 psi | 77% | 2388 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 45,310 psi | 71% | 2388 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 45,861 psi | 72% | 2405 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 37,840 psi | 59% | 2303 fps | 99.9% |
| Vihtavuori N160 | <<locked>> | 80% | 33,765 psi | 53% | 2267 fps | 97.2% |
| Vihtavuori N165 | <<locked>> | 96% | 39,465 psi | 62% | 2388 fps | 95.1% |
| Vihtavuori N530 | <<locked>> | 80% | 51,242 psi | 80% | 2507 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 44,048 psi | 69% | 2398 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 33,228 psi | 52% | 2270 fps | 96.8% |
| Vihtavuori N555 | <<locked>> | 82% | 26,818 psi | 42% | 2175 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 33,301 psi | 52% | 2247 fps | 98.9% |
| Winchester 748 | <<locked>> | 80% | 51,329 psi | 80% | 2552 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 36,782 psi | 58% | 2365 fps | 95.5% |
| Winchester StaBALL HD | <<locked>> | 86% | 24,831 psi | 39% | 2175 fps | 95.6% |
| Winchester StaBALL Match | <<locked>> | 80% | 47,007 psi | 74% | 2493 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 42,598 psi | 67% | 2448 fps | 95.2% |
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 107 powders for 8 x 75 S loaded with the .323 | 220gr | Barnes Solid RN. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,743 fps; across all powders the maximum-charge window runs from 1,572 fps to 2,743 fps. Accurate 3100 gives the best case fill at 100 %, and 107 of the 107 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 56–90 %, leaving at least 10 % headroom. The 220.0 gr projectile in 0.323" calls for a 1:13.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2209, Alliant Reloder-19 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, Hodgdon Superformance, Alliant Reloder-17 rank at the top here: for 8 x 75 S with the .323 | 220gr | Barnes Solid RN 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.