Load Specifications
Bullet Manufacturer:Peregrine
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:1:13.0
Load data in caliber 8 x 75 S with .323 | 220gr | Peregrine Brass Backup (VRG-2) bullet and 109 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% | 54,708 psi | 86% | 2484 fps | 100% |
| Accurate 2495 | <<locked>> | 88% | 57,145 psi | 90% | 2552 fps | 100% |
| Accurate 2520 | <<locked>> | 82% | 55,259 psi | 87% | 2575 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 56,144 psi | 88% | 2579 fps | 98.7% |
| Accurate 3100ᴾ | <<locked>> | 100% | 44,179 psi | 69% | 2500 fps | 98.4% |
| Accurate 4064 | <<locked>> | 90% | 57,174 psi | 90% | 2602 fps | 100% |
| Accurate 4350 | <<locked>> | 98% | 57,638 psi | 90% | 2703 fps | 100% |
| ADI AR 2206H | <<locked>> | 86% | 57,522 psi | 90% | 2638 fps | 100% |
| ADI AR 2208 | <<locked>> | 90% | 55,230 psi | 87% | 2598 fps | 100% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 52,025 psi | 82% | 2641 fps | 97.5% |
| ADI Benchmark 8208 | <<locked>> | 84% | 56,304 psi | 88% | 2585 fps | 100% |
| Alliant AR-Comp | <<locked>> | 82% | 54,244 psi | 85% | 2513 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 88% | 57,725 psi | 90% | 2762 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 90% | 55,245 psi | 87% | 2615 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 88% | 55,840 psi | 88% | 2638 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 98% | 55,158 psi | 86% | 2710 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 94% | 56,478 psi | 89% | 2740 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 51,126 psi | 80% | 2631 fps | 97.5% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 44,701 psi | 70% | 2575 fps | 96.2% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 41,974 psi | 66% | 2526 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 36,796 psi | 58% | 2438 fps | 97.2% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 47,195 psi | 74% | 2687 fps | 99.8% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 57,682 psi | 90% | 2664 fps | 100% |
| Bofors RP3 | <<locked>> | 90% | 55,956 psi | 88% | 2631 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 44,701 psi | 70% | 2575 fps | 96.2% |
| Bofors RP7 | <<locked>> | 94% | 55,825 psi | 87% | 2615 fps | 98.9% |
| Hodgdon Benchmark | <<locked>> | 82% | 54,578 psi | 86% | 2523 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 84% | 55,927 psi | 88% | 2618 fps | 100% |
| Hodgdon H380 | <<locked>> | 90% | 56,826 psi | 89% | 2648 fps | 100% |
| Hodgdon H414 | <<locked>> | 96% | 56,623 psi | 89% | 2707 fps | 99.4% |
| Hodgdon H4350 | <<locked>> | 94% | 57,116 psi | 90% | 2671 fps | 98.6% |
| Hodgdon H4895 | <<locked>> | 84% | 54,476 psi | 85% | 2598 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 54,998 psi | 86% | 2635 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 54,201 psi | 85% | 2635 fps | 100% |
| Hodgdon Superformance | <<locked>> | 96% | 57,450 psi | 90% | 2753 fps | 99.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,853 psi | 56% | 1572 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 55,724 psi | 87% | 2602 fps | 100% |
| IMR 3031 | <<locked>> | 84% | 55,085 psi | 86% | 2579 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 54,534 psi | 85% | 2579 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 86% | 54,215 psi | 85% | 2562 fps | 99% |
| IMR 4350 | <<locked>> | 98% | 56,391 psi | 88% | 2644 fps | 99% |
| IMR 4451 Enduron | <<locked>> | 92% | 54,288 psi | 85% | 2592 fps | 99% |
| IMR 4831 | <<locked>> | 98% | 54,375 psi | 85% | 2648 fps | 100% |
| IMR 4895 | <<locked>> | 88% | 57,290 psi | 90% | 2664 fps | 100% |
| IMR 8208 XBR | <<locked>> | 84% | 56,304 psi | 88% | 2585 fps | 100% |
| Lovex D073.6 | <<locked>> | 86% | 57,638 psi | 90% | 2612 fps | 100% |
| Lovex S060 | <<locked>> | 86% | 56,739 psi | 89% | 2566 fps | 100% |
| Lovex S062 | <<locked>> | 88% | 54,549 psi | 85% | 2572 fps | 100% |
| Lovex S065 | <<locked>> | 96% | 57,058 psi | 89% | 2631 fps | 99.9% |
| Lovex S070 | <<locked>> | 96% | 54,694 psi | 86% | 2625 fps | 99.3% |
| Lovex S071ᴾ | <<locked>> | 100% | 36,434 psi | 57% | 2359 fps | 96.6% |
| Norma 201 | <<locked>> | 86% | 55,985 psi | 88% | 2582 fps | 100% |
| Norma 202 | <<locked>> | 86% | 56,724 psi | 89% | 2579 fps | 100% |
| Norma 203B | <<locked>> | 88% | 55,085 psi | 86% | 2625 fps | 100% |
| Norma 204 | <<locked>> | 98% | 57,014 psi | 89% | 2694 fps | 98.2% |
| Norma MRPᴾ | <<locked>> | 100% | 46,934 psi | 74% | 2644 fps | 98.2% |
| Norma URP | <<locked>> | 98% | 56,434 psi | 88% | 2690 fps | 100% |
| Ramshot Big Game | <<locked>> | 88% | 55,666 psi | 87% | 2651 fps | 100% |
| Ramshot Hunter | <<locked>> | 98% | 55,158 psi | 86% | 2694 fps | 99.7% |
| Ramshot TAC | <<locked>> | 84% | 56,565 psi | 89% | 2618 fps | 99.9% |
| Ramshot Wild Boar | <<locked>> | 84% | 56,492 psi | 89% | 2631 fps | 100% |
| Ramshot X-Terminator | <<locked>> | 82% | 57,174 psi | 90% | 2595 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,347 psi | 57% | 1608 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 56,898 psi | 89% | 2635 fps | 99.6% |
| ReloadSwiss RS 52 | <<locked>> | 86% | 56,681 psi | 89% | 2700 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 92% | 56,275 psi | 88% | 2733 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 57,522 psi | 90% | 2730 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 98% | 56,826 psi | 89% | 2762 fps | 100% |
| Rottweil R 901 | <<locked>> | 84% | 56,898 psi | 89% | 2559 fps | 100% |
| Rottweil R 902 | <<locked>> | 88% | 56,681 psi | 89% | 2582 fps | 100% |
| Rottweil R 903 | <<locked>> | 92% | 55,840 psi | 88% | 2625 fps | 100% |
| Rottweil R 904ᴾ | <<locked>> | 100% | 53,969 psi | 85% | 2615 fps | 96.7% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 49,864 psi | 78% | 2615 fps | 97.4% |
| Rottweil R 907 | <<locked>> | 94% | 55,825 psi | 87% | 2615 fps | 98.9% |
| Shooters World Long Rifle | <<locked>> | 96% | 57,058 psi | 89% | 2631 fps | 99.9% |
| Shooters World Match Rifle | <<locked>> | 86% | 57,638 psi | 90% | 2612 fps | 100% |
| Shooters World Precision | <<locked>> | 88% | 54,549 psi | 85% | 2572 fps | 100% |
| Shooters World SW4350 | <<locked>> | 96% | 54,694 psi | 86% | 2625 fps | 99.3% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 57,725 psi | 90% | 2684 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 55,042 psi | 86% | 2595 fps | 99.9% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 55,985 psi | 88% | 2615 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 57,725 psi | 90% | 2520 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 54,418 psi | 85% | 2477 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 57,435 psi | 90% | 2592 fps | 99.3% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 49,385 psi | 77% | 2612 fps | 97.3% |
| Somchem S321 | <<locked>> | 82% | 57,566 psi | 90% | 2618 fps | 100% |
| Somchem S335 | <<locked>> | 86% | 56,797 psi | 89% | 2516 fps | 100% |
| Somchem S341 | <<locked>> | 84% | 54,839 psi | 86% | 2585 fps | 100% |
| Somchem S355 | <<locked>> | 92% | 55,883 psi | 88% | 2618 fps | 100% |
| Somchem S361ᴾ | <<locked>> | 100% | 55,709 psi | 87% | 2612 fps | 96.1% |
| Somchem S365ᴾ | <<locked>> | 100% | 54,752 psi | 86% | 2687 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 50,618 psi | 79% | 2595 fps | 98.2% |
| Vihtavuori N130 | <<locked>> | 82% | 57,348 psi | 90% | 2477 fps | 100% |
| Vihtavuori N133 | <<locked>> | 84% | 54,694 psi | 86% | 2461 fps | 100% |
| Vihtavuori N135 | <<locked>> | 88% | 56,579 psi | 89% | 2539 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 57,508 psi | 90% | 2562 fps | 100% |
| Vihtavuori N150 | <<locked>> | 94% | 57,464 psi | 90% | 2595 fps | 100% |
| Vihtavuori N160 | <<locked>> | 96% | 55,593 psi | 87% | 2641 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 43,540 psi | 68% | 2467 fps | 96.3% |
| Vihtavuori N530 | <<locked>> | 84% | 56,869 psi | 89% | 2589 fps | 100% |
| Vihtavuori N540 | <<locked>> | 88% | 55,463 psi | 87% | 2562 fps | 100% |
| Vihtavuori N550 | <<locked>> | 96% | 54,433 psi | 85% | 2648 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 46,456 psi | 73% | 2592 fps | 99.9% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 55,477 psi | 87% | 2618 fps | 100% |
| Winchester 748 | <<locked>> | 84% | 57,159 psi | 90% | 2631 fps | 100% |
| Winchester 760 | <<locked>> | 96% | 56,913 psi | 89% | 2710 fps | 99.4% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 37,594 psi | 59% | 2556 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 86% | 55,999 psi | 88% | 2621 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 47,326 psi | 74% | 2533 fps | 96.5% |
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% | 51,474 psi | 81% | 2444 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 43,816 psi | 69% | 2382 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 51,692 psi | 81% | 2530 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 43,076 psi | 68% | 2379 fps | 96.4% |
| Accurate 3100 | <<locked>> | 92% | 33,373 psi | 52% | 2297 fps | 95.5% |
| Accurate 4064 | <<locked>> | 80% | 41,481 psi | 65% | 2385 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 30,676 psi | 48% | 2244 fps | 96.4% |
| ADI AR 2206H | <<locked>> | 80% | 47,558 psi | 75% | 2497 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 40,408 psi | 63% | 2365 fps | 99.2% |
| ADI AR 2209 | <<locked>> | 94% | 42,989 psi | 67% | 2487 fps | 95.3% |
| ADI Benchmark 8208 | <<locked>> | 80% | 49,734 psi | 78% | 2497 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 50,850 psi | 80% | 2470 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 43,584 psi | 68% | 2546 fps | 99.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 40,292 psi | 63% | 2385 fps | 99.9% |
| Alliant Reloder-15 | <<locked>> | 80% | 43,163 psi | 68% | 2444 fps | 99.6% |
| Alliant Reloder-16 | <<locked>> | 80% | 31,198 psi | 49% | 2260 fps | 96.7% |
| Alliant Reloder-17 | 53.2 gr | 80% | 34,780 psi | 55% | 2375 fps | 99.2% |
| Alliant Reloder-19 | <<locked>> | 94% | 42,192 psi | 66% | 2480 fps | 95.3% |
| Alliant Reloder-22 | <<locked>> | 98% | 41,785 psi | 65% | 2520 fps | 95.4% |
| Alliant Reloder-23 | <<locked>> | 84% | 25,353 psi | 40% | 2129 fps | 95.4% |
| Alliant Reloder-25 | <<locked>> | 96% | 32,489 psi | 51% | 2333 fps | 95.3% |
| Alliant Reloder-26 | <<locked>> | 88% | 30,821 psi | 48% | 2339 fps | 95.7% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 47,079 psi | 74% | 2513 fps | 99.8% |
| Bofors RP3 | <<locked>> | 80% | 40,016 psi | 63% | 2392 fps | 99.9% |
| Bofors RP5 | <<locked>> | 98% | 41,785 psi | 65% | 2520 fps | 95.4% |
| Bofors RP7 | <<locked>> | 82% | 38,189 psi | 60% | 2320 fps | 95.2% |
| Hodgdon Benchmark | <<locked>> | 80% | 51,227 psi | 80% | 2477 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 48,791 psi | 76% | 2523 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 40,683 psi | 64% | 2398 fps | 98.6% |
| Hodgdon H414 | <<locked>> | 82% | 35,389 psi | 55% | 2343 fps | 95% |
| Hodgdon H4350 | <<locked>> | 84% | 41,423 psi | 65% | 2418 fps | 95.4% |
| Hodgdon H4895 | <<locked>> | 80% | 48,037 psi | 75% | 2507 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 28,631 psi | 45% | 2169 fps | 97.4% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 44,367 psi | 70% | 2490 fps | 100% |
| Hodgdon Superformance | 59 gr | 84% | 37,130 psi | 58% | 2405 fps | 95% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,643 psi | 42% | 1401 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 46,021 psi | 72% | 2461 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 48,211 psi | 76% | 2487 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 42,438 psi | 67% | 2392 fps | 99.6% |
| IMR 4166 Enduron | <<locked>> | 80% | 44,904 psi | 70% | 2418 fps | 97.6% |
| IMR 4350 | <<locked>> | 86% | 38,537 psi | 60% | 2352 fps | 95.4% |
| IMR 4451 Enduron | <<locked>> | 80% | 37,405 psi | 59% | 2303 fps | 95.4% |
| IMR 4831 | <<locked>> | 80% | 29,979 psi | 47% | 2208 fps | 96.2% |
| IMR 4895 | <<locked>> | 80% | 44,237 psi | 69% | 2470 fps | 99.9% |
| IMR 8208 XBR | <<locked>> | 80% | 49,734 psi | 78% | 2497 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 47,094 psi | 74% | 2474 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 47,224 psi | 74% | 2434 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 42,322 psi | 66% | 2392 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 34,722 psi | 54% | 2254 fps | 96.2% |
| Lovex S070 | <<locked>> | 82% | 35,070 psi | 55% | 2283 fps | 95.1% |
| Lovex S071 | <<locked>> | 98% | 34,113 psi | 53% | 2310 fps | 95.8% |
| Norma 201 | <<locked>> | 80% | 46,398 psi | 73% | 2448 fps | 100% |
| Norma 202 | <<locked>> | 80% | 47,036 psi | 74% | 2451 fps | 100% |
| Norma 203B | <<locked>> | 80% | 42,496 psi | 67% | 2434 fps | 99.8% |
| Norma 204 | <<locked>> | 90% | 43,482 psi | 68% | 2480 fps | 95.4% |
| Norma MRP | <<locked>> | 94% | 38,392 psi | 60% | 2484 fps | 95.8% |
| Norma URP | <<locked>> | 80% | 31,256 psi | 49% | 2247 fps | 96.4% |
| Ramshot Big Game | <<locked>> | 80% | 42,308 psi | 66% | 2451 fps | 99.7% |
| Ramshot Hunter | <<locked>> | 84% | 34,766 psi | 54% | 2336 fps | 95.8% |
| Ramshot TAC | <<locked>> | 80% | 49,661 psi | 78% | 2520 fps | 99.4% |
| Ramshot Wild Boar | <<locked>> | 80% | 49,414 psi | 77% | 2533 fps | 100% |
| Ramshot X-Terminator | <<locked>> | 80% | 53,447 psi | 84% | 2543 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,948 psi | 42% | 1434 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 40,973 psi | 64% | 2382 fps | 97.3% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 46,122 psi | 72% | 2549 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 37,101 psi | 58% | 2431 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 30,472 psi | 48% | 2260 fps | 95.9% |
| ReloadSwiss RS 70 | 55.4 gr | 82% | 32,721 psi | 51% | 2320 fps | 96% |
| Rottweil R 901 | <<locked>> | 80% | 50,430 psi | 79% | 2474 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 44,208 psi | 69% | 2405 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 37,637 psi | 59% | 2343 fps | 99.6% |
| Rottweil R 904 | <<locked>> | 96% | 47,427 psi | 74% | 2516 fps | 95.3% |
| Rottweil R 905 | <<locked>> | 94% | 40,741 psi | 64% | 2457 fps | 95.1% |
| Rottweil R 907 | <<locked>> | 82% | 38,189 psi | 60% | 2320 fps | 95.2% |
| Shooters World Long Rifle | <<locked>> | 80% | 34,722 psi | 54% | 2254 fps | 96.2% |
| Shooters World Match Rifle | <<locked>> | 80% | 47,094 psi | 74% | 2474 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 42,322 psi | 66% | 2392 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 35,070 psi | 55% | 2283 fps | 95.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 38,783 psi | 61% | 2392 fps | 99.4% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 47,979 psi | 75% | 2497 fps | 99.5% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 46,137 psi | 72% | 2474 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 47,921 psi | 75% | 2395 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 40,045 psi | 63% | 2277 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 36,274 psi | 57% | 2254 fps | 95.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 40,364 psi | 63% | 2454 fps | 95% |
| Somchem S321 | <<locked>> | 80% | 54,012 psi | 85% | 2572 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 47,326 psi | 74% | 2392 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 47,892 psi | 75% | 2490 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 38,305 psi | 60% | 2343 fps | 99.6% |
| Somchem S361 | <<locked>> | 98% | 52,214 psi | 82% | 2562 fps | 95.4% |
| Somchem S365 | <<locked>> | 80% | 27,804 psi | 44% | 2205 fps | 98.4% |
| Somchem S385 | <<locked>> | 92% | 38,638 psi | 61% | 2392 fps | 95.4% |
| Vihtavuori N130 | <<locked>> | 80% | 53,983 psi | 85% | 2438 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 48,414 psi | 76% | 2382 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 44,150 psi | 69% | 2379 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 44,628 psi | 70% | 2392 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 36,550 psi | 57% | 2287 fps | 99.9% |
| Vihtavuori N160 | <<locked>> | 80% | 32,518 psi | 51% | 2251 fps | 96.8% |
| Vihtavuori N165 | <<locked>> | 98% | 40,683 psi | 64% | 2418 fps | 95.5% |
| Vihtavuori N530 | <<locked>> | 80% | 50,024 psi | 78% | 2497 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 42,815 psi | 67% | 2385 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 31,981 psi | 50% | 2251 fps | 96.4% |
| Vihtavuori N555 | <<locked>> | 84% | 27,180 psi | 43% | 2198 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 32,227 psi | 51% | 2228 fps | 98.7% |
| Winchester 748 | <<locked>> | 80% | 50,038 psi | 78% | 2539 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 35,578 psi | 56% | 2346 fps | 95.1% |
| Winchester StaBALL HD | <<locked>> | 88% | 25,237 psi | 40% | 2201 fps | 96% |
| Winchester StaBALL Match | <<locked>> | 80% | 45,774 psi | 72% | 2477 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 44,121 psi | 69% | 2480 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 109 powders for 8 x 75 S loaded with the .323 | 220gr | Peregrine Brass Backup (VRG-2). Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,762 fps; across all powders the maximum-charge window runs from 1,572 fps to 2,762 fps. Accurate 3100 gives the best case fill at 100 %, and 109 of the 109 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 1:13.0 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 | Peregrine Brass Backup (VRG-2) 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.