Load Specifications
Bullet:.323 | 200gr | Swift A-Frame
Bullet Manufacturer:Swift
Bullet Weight:200 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:1:15.0
Load data in caliber 8 x 75 S with .323 | 200gr | Swift A-Frame bullet and 103 powders. The key underlying parameters are shown in the table above.
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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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>> | 84% | 57,580 psi | 90% | 2651 fps | 100% |
| Accurate 2495 | <<locked>> | 88% | 56,695 psi | 89% | 2684 fps | 100% |
| Accurate 2520 | <<locked>> | 82% | 54,694 psi | 86% | 2703 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 55,419 psi | 87% | 2694 fps | 98% |
| Accurate 3100ᴾ | <<locked>> | 100% | 43,598 psi | 68% | 2608 fps | 97.6% |
| Accurate 4064 | <<locked>> | 90% | 56,724 psi | 89% | 2733 fps | 100% |
| Accurate 4350 | <<locked>> | 98% | 56,826 psi | 89% | 2828 fps | 100% |
| ADI AR 2206H | <<locked>> | 86% | 56,840 psi | 89% | 2766 fps | 100% |
| ADI AR 2208 | <<locked>> | 90% | 54,462 psi | 85% | 2720 fps | 100% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 51,445 psi | 81% | 2756 fps | 96.5% |
| ADI Benchmark 8208 | <<locked>> | 84% | 55,811 psi | 87% | 2717 fps | 100% |
| Alliant AR-Comp | <<locked>> | 84% | 57,116 psi | 90% | 2684 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 88% | 56,753 psi | 89% | 2890 fps | 100% |
| Alliant Power Pro Varmintᴾ | <<locked>> | 100% | 50,952 psi | 80% | 2749 fps | 96.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 90% | 54,694 psi | 86% | 2743 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 88% | 55,071 psi | 86% | 2762 fps | 100% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 57,682 psi | 90% | 2881 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 94% | 55,390 psi | 87% | 2864 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 50,198 psi | 79% | 2743 fps | 96.4% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 41,481 psi | 65% | 2638 fps | 99.7% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 46,615 psi | 73% | 2802 fps | 99.4% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 56,666 psi | 89% | 2785 fps | 100% |
| Bofors RP3 | <<locked>> | 90% | 55,288 psi | 87% | 2756 fps | 100% |
| Bofors RP7 | <<locked>> | 94% | 55,071 psi | 86% | 2733 fps | 98.2% |
| Hodgdon Benchmark | <<locked>> | 84% | 57,217 psi | 90% | 2694 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 84% | 55,288 psi | 87% | 2746 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 82% | 57,305 psi | 90% | 2844 fps | 100% |
| Hodgdon H380 | <<locked>> | 90% | 55,999 psi | 88% | 2772 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 96% | 55,695 psi | 87% | 2825 fps | 98.8% |
| Hodgdon H4350 | <<locked>> | 94% | 56,202 psi | 88% | 2785 fps | 97.8% |
| Hodgdon H4895 | <<locked>> | 86% | 57,479 psi | 90% | 2776 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 54,114 psi | 85% | 2756 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 88% | 57,145 psi | 90% | 2808 fps | 100% |
| Hodgdon Superformance | <<locked>> | 96% | 56,362 psi | 88% | 2867 fps | 98.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,679 psi | 56% | 1660 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 55,056 psi | 86% | 2726 fps | 100% |
| IMR 3031 | <<locked>> | 84% | 54,157 psi | 85% | 2703 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 57,406 psi | 90% | 2749 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 88% | 57,203 psi | 90% | 2736 fps | 98.8% |
| IMR 4350 | <<locked>> | 98% | 55,579 psi | 87% | 2759 fps | 98.3% |
| IMR 4451 Enduron | <<locked>> | 94% | 56,884 psi | 89% | 2759 fps | 98.8% |
| IMR 4831ᴾ | <<locked>> | 100% | 57,159 psi | 90% | 2818 fps | 100% |
| IMR 4895 | <<locked>> | 88% | 56,492 psi | 89% | 2789 fps | 100% |
| IMR 8208 XBR | <<locked>> | 84% | 55,811 psi | 87% | 2717 fps | 100% |
| Lovex D073.6 | <<locked>> | 86% | 56,840 psi | 89% | 2740 fps | 100% |
| Lovex S060 | <<locked>> | 86% | 56,014 psi | 88% | 2690 fps | 100% |
| Lovex S062 | <<locked>> | 90% | 57,217 psi | 90% | 2743 fps | 100% |
| Lovex S065 | <<locked>> | 96% | 56,449 psi | 88% | 2756 fps | 99.5% |
| Lovex S070 | <<locked>> | 98% | 57,479 psi | 90% | 2792 fps | 99.1% |
| Norma 201 | <<locked>> | 86% | 55,419 psi | 87% | 2710 fps | 100% |
| Norma 202 | <<locked>> | 86% | 56,231 psi | 88% | 2710 fps | 100% |
| Norma 203B | <<locked>> | 88% | 54,317 psi | 85% | 2749 fps | 100% |
| Norma 204 | <<locked>> | 98% | 56,115 psi | 88% | 2808 fps | 97.3% |
| Norma MRPᴾ | <<locked>> | 100% | 46,354 psi | 73% | 2756 fps | 97.2% |
| Norma URP | <<locked>> | 98% | 55,593 psi | 87% | 2815 fps | 99.9% |
| Ramshot Big Game | <<locked>> | 88% | 54,824 psi | 86% | 2772 fps | 100% |
| Ramshot Hunter | <<locked>> | 98% | 54,273 psi | 85% | 2812 fps | 99.2% |
| Ramshot TAC | <<locked>> | 84% | 55,883 psi | 88% | 2740 fps | 99.6% |
| Ramshot Wild Boar | <<locked>> | 84% | 55,753 psi | 87% | 2756 fps | 100% |
| Ramshot X-Terminator | <<locked>> | 82% | 56,492 psi | 89% | 2717 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,361 psi | 57% | 1703 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 56,217 psi | 88% | 2753 fps | 99.1% |
| ReloadSwiss RS 52 | <<locked>> | 86% | 55,608 psi | 87% | 2828 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 92% | 55,056 psi | 86% | 2858 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 56,434 psi | 88% | 2851 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 98% | 55,666 psi | 87% | 2877 fps | 99.9% |
| Rottweil R 901 | <<locked>> | 84% | 56,550 psi | 89% | 2687 fps | 100% |
| Rottweil R 902 | <<locked>> | 88% | 56,028 psi | 88% | 2707 fps | 100% |
| Rottweil R 903 | <<locked>> | 92% | 55,172 psi | 86% | 2749 fps | 100% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 48,965 psi | 77% | 2723 fps | 96.3% |
| Rottweil R 907 | <<locked>> | 94% | 55,071 psi | 86% | 2733 fps | 98.2% |
| Shooters World Long Rifle | <<locked>> | 96% | 56,449 psi | 88% | 2756 fps | 99.5% |
| Shooters World Match Rifle | <<locked>> | 86% | 56,840 psi | 89% | 2740 fps | 100% |
| Shooters World Precision | <<locked>> | 90% | 57,217 psi | 90% | 2743 fps | 100% |
| Shooters World SW4350 | <<locked>> | 98% | 57,479 psi | 90% | 2792 fps | 99.1% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 56,724 psi | 89% | 2808 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 54,491 psi | 85% | 2720 fps | 99.7% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 55,100 psi | 86% | 2740 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 56,927 psi | 89% | 2644 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 57,101 psi | 89% | 2641 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 56,666 psi | 89% | 2710 fps | 98.8% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 48,486 psi | 76% | 2720 fps | 96.2% |
| Somchem S321 | <<locked>> | 82% | 57,101 psi | 89% | 2749 fps | 100% |
| Somchem S335 | <<locked>> | 86% | 56,188 psi | 88% | 2641 fps | 100% |
| Somchem S341 | <<locked>> | 84% | 54,114 psi | 85% | 2710 fps | 100% |
| Somchem S355 | <<locked>> | 92% | 55,245 psi | 87% | 2743 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 53,809 psi | 84% | 2815 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 49,676 psi | 78% | 2703 fps | 97.3% |
| Vihtavuori N130 | <<locked>> | 82% | 56,565 psi | 89% | 2602 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 57,203 psi | 90% | 2628 fps | 100% |
| Vihtavuori N135 | <<locked>> | 88% | 55,854 psi | 88% | 2667 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 56,768 psi | 89% | 2690 fps | 100% |
| Vihtavuori N150 | <<locked>> | 94% | 56,811 psi | 89% | 2723 fps | 100% |
| Vihtavuori N160 | <<locked>> | 96% | 54,592 psi | 86% | 2759 fps | 99.9% |
| Vihtavuori N530 | <<locked>> | 84% | 56,318 psi | 88% | 2713 fps | 100% |
| Vihtavuori N540 | <<locked>> | 88% | 54,868 psi | 86% | 2687 fps | 100% |
| Vihtavuori N550 | <<locked>> | 98% | 57,116 psi | 90% | 2815 fps | 99.9% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 45,803 psi | 72% | 2707 fps | 99.6% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 54,549 psi | 85% | 2736 fps | 100% |
| Winchester 748 | <<locked>> | 84% | 56,492 psi | 89% | 2762 fps | 100% |
| Winchester 760 | <<locked>> | 96% | 55,970 psi | 88% | 2828 fps | 98.9% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 37,202 psi | 58% | 2657 fps | 99.9% |
| Winchester StaBALL Match | <<locked>> | 86% | 55,230 psi | 87% | 2749 fps | 100% |
Start Load - Barrel Length: 25.6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 80% | 50,995 psi | 80% | 2569 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 43,961 psi | 69% | 2507 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 51,097 psi | 80% | 2654 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 42,743 psi | 67% | 2484 fps | 95.3% |
| Accurate 3100 | <<locked>> | 94% | 35,636 psi | 56% | 2451 fps | 95.3% |
| Accurate 4064 | <<locked>> | 80% | 41,568 psi | 65% | 2507 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 30,589 psi | 48% | 2346 fps | 95.3% |
| ADI AR 2206H | <<locked>> | 80% | 47,065 psi | 74% | 2615 fps | 99.8% |
| ADI AR 2208 | <<locked>> | 80% | 40,118 psi | 63% | 2477 fps | 98.6% |
| ADI AR 2209 | <<locked>> | 98% | 48,240 psi | 76% | 2700 fps | 95.7% |
| ADI Benchmark 8208 | <<locked>> | 80% | 49,124 psi | 77% | 2618 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 49,995 psi | 78% | 2595 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 43,134 psi | 68% | 2664 fps | 99.2% |
| Alliant Power Pro Varmint | <<locked>> | 96% | 45,005 psi | 71% | 2644 fps | 95% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 39,987 psi | 63% | 2500 fps | 99.6% |
| Alliant Reloder-15 | <<locked>> | 80% | 42,743 psi | 67% | 2559 fps | 99.2% |
| Alliant Reloder-16 | <<locked>> | 80% | 30,951 psi | 49% | 2359 fps | 95.4% |
| Alliant Reloder-17 | <<locked>> | 80% | 34,490 psi | 54% | 2480 fps | 98.5% |
| Alliant Reloder-19 | <<locked>> | 98% | 47,224 psi | 74% | 2690 fps | 95.7% |
| Alliant Reloder-23 | <<locked>> | 86% | 26,919 psi | 42% | 2274 fps | 95.1% |
| Alliant Reloder-26 | <<locked>> | 90% | 32,837 psi | 51% | 2493 fps | 95.4% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 46,325 psi | 73% | 2625 fps | 99.3% |
| Bofors RP3 | <<locked>> | 80% | 39,697 psi | 62% | 2503 fps | 99.6% |
| Bofors RP7 | <<locked>> | 86% | 43,004 psi | 67% | 2526 fps | 95.7% |
| Hodgdon Benchmark | <<locked>> | 80% | 50,720 psi | 79% | 2602 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 48,385 psi | 76% | 2644 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 80% | 53,548 psi | 84% | 2792 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 40,480 psi | 63% | 2510 fps | 97.9% |
| Hodgdon H414 | <<locked>> | 86% | 40,190 psi | 63% | 2559 fps | 95.6% |
| Hodgdon H4350 | <<locked>> | 86% | 43,700 psi | 68% | 2575 fps | 95% |
| Hodgdon H4895 | <<locked>> | 80% | 47,500 psi | 74% | 2628 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 28,456 psi | 45% | 2264 fps | 96.3% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 43,743 psi | 69% | 2605 fps | 99.9% |
| Hodgdon Superformance | <<locked>> | 88% | 42,337 psi | 66% | 2625 fps | 95.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,687 psi | 42% | 1483 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 45,469 psi | 71% | 2579 fps | 99.9% |
| IMR 3031 | <<locked>> | 80% | 47,485 psi | 74% | 2612 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 42,148 psi | 66% | 2507 fps | 99.1% |
| IMR 4166 Enduron | <<locked>> | 80% | 44,396 psi | 70% | 2526 fps | 96.6% |
| IMR 4350 | <<locked>> | 88% | 40,654 psi | 64% | 2507 fps | 95% |
| IMR 4451 Enduron | <<locked>> | 82% | 39,494 psi | 62% | 2461 fps | 95.1% |
| IMR 4831 | <<locked>> | 80% | 29,834 psi | 47% | 2310 fps | 95% |
| IMR 4895 | <<locked>> | 80% | 43,758 psi | 69% | 2589 fps | 99.6% |
| IMR 8208 XBR | <<locked>> | 80% | 49,124 psi | 77% | 2618 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 46,499 psi | 73% | 2595 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 46,891 psi | 73% | 2552 fps | 99.8% |
| Lovex S062 | <<locked>> | 80% | 42,119 psi | 66% | 2510 fps | 99.9% |
| Lovex S065 | <<locked>> | 80% | 34,679 psi | 54% | 2362 fps | 95.2% |
| Lovex S070 | <<locked>> | 86% | 39,682 psi | 62% | 2490 fps | 95.6% |
| Norma 201 | <<locked>> | 80% | 46,209 psi | 72% | 2569 fps | 100% |
| Norma 202 | <<locked>> | 80% | 46,644 psi | 73% | 2572 fps | 100% |
| Norma 203B | <<locked>> | 80% | 42,119 psi | 66% | 2549 fps | 99.4% |
| Norma 204 | <<locked>> | 92% | 45,847 psi | 72% | 2641 fps | 95% |
| Norma MRP | <<locked>> | 96% | 40,480 psi | 63% | 2638 fps | 95.4% |
| Norma URP | <<locked>> | 80% | 30,908 psi | 48% | 2349 fps | 95.2% |
| Ramshot Big Game | <<locked>> | 80% | 41,872 psi | 66% | 2566 fps | 99.3% |
| Ramshot Hunter | <<locked>> | 86% | 36,695 psi | 57% | 2490 fps | 95.4% |
| Ramshot TAC | <<locked>> | 80% | 49,168 psi | 77% | 2638 fps | 98.9% |
| Ramshot Wild Boar | <<locked>> | 80% | 48,689 psi | 76% | 2651 fps | 99.9% |
| Ramshot X-Terminator | <<locked>> | 80% | 52,968 psi | 83% | 2667 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,992 psi | 42% | 1519 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 40,611 psi | 64% | 2490 fps | 96.3% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 45,252 psi | 71% | 2664 fps | 99.5% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 36,680 psi | 57% | 2539 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 32,474 psi | 51% | 2415 fps | 95.6% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 34,766 psi | 54% | 2477 fps | 95.6% |
| Rottweil R 901 | <<locked>> | 80% | 50,241 psi | 79% | 2598 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 43,888 psi | 69% | 2523 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 37,275 psi | 58% | 2451 fps | 99.1% |
| Rottweil R 905 | <<locked>> | 98% | 45,861 psi | 72% | 2671 fps | 95.6% |
| Rottweil R 907 | <<locked>> | 86% | 43,004 psi | 67% | 2526 fps | 95.7% |
| Shooters World Long Rifle | <<locked>> | 80% | 34,679 psi | 54% | 2362 fps | 95.2% |
| Shooters World Match Rifle | <<locked>> | 80% | 46,499 psi | 73% | 2595 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 42,119 psi | 66% | 2510 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 86% | 39,682 psi | 62% | 2490 fps | 95.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 38,218 psi | 60% | 2500 fps | 98.7% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 47,630 psi | 75% | 2615 fps | 99% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 45,484 psi | 71% | 2589 fps | 99.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 47,224 psi | 74% | 2510 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 39,508 psi | 62% | 2388 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 38,522 psi | 60% | 2408 fps | 95% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 45,440 psi | 71% | 2664 fps | 95.4% |
| Somchem S321 | <<locked>> | 80% | 53,229 psi | 83% | 2694 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 47,065 psi | 74% | 2516 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 47,137 psi | 74% | 2605 fps | 99.8% |
| Somchem S355 | <<locked>> | 80% | 38,145 psi | 60% | 2457 fps | 99.1% |
| Somchem S365 | <<locked>> | 80% | 27,746 psi | 43% | 2303 fps | 97.5% |
| Somchem S385 | <<locked>> | 94% | 40,857 psi | 64% | 2549 fps | 95% |
| Vihtavuori N130 | <<locked>> | 80% | 53,185 psi | 83% | 2559 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 47,630 psi | 75% | 2500 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 43,540 psi | 68% | 2497 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 43,990 psi | 69% | 2507 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 36,172 psi | 57% | 2392 fps | 99.5% |
| Vihtavuori N160 | <<locked>> | 80% | 32,300 psi | 51% | 2352 fps | 95.7% |
| Vihtavuori N530 | <<locked>> | 80% | 49,400 psi | 77% | 2615 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 42,540 psi | 67% | 2503 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 31,879 psi | 50% | 2352 fps | 95.3% |
| Vihtavuori N555 | <<locked>> | 86% | 29,008 psi | 45% | 2349 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 31,966 psi | 50% | 2326 fps | 97.8% |
| Winchester 748 | <<locked>> | 80% | 49,356 psi | 77% | 2661 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 40,190 psi | 63% | 2559 fps | 95.6% |
| Winchester StaBALL HD | <<locked>> | 90% | 27,021 psi | 42% | 2349 fps | 95.6% |
| Winchester StaBALL Match | <<locked>> | 80% | 45,194 psi | 71% | 2595 fps | 99.9% |
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 103 powders for 8 x 75 S loaded with the .323 | 200gr | Swift A-Frame. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,890 fps; across all powders the maximum-charge window runs from 1,660 fps to 2,890 fps. Accurate 3100 gives the best case fill at 100 %, and 103 of the 103 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 200.0 gr projectile in 0.323" calls for a 1:15.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2209, Alliant Power Pro Varmint 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. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.