Load Specifications
Load data in caliber 8 x 64 S with .323 | 180gr | Hornady GMX bullet and 82 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Power Pro 2000-MR, Hodgdon CFE223 and ReloadSwiss RS 52.
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: 23.62"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 90% | 52,141 psi | 89% | 2621 fps | 100% |
| Accurate 2200 | <<locked>> | 82% | 52,881 psi | 90% | 2707 fps | 98.2% |
| Accurate 2460 | <<locked>> | 86% | 50,488 psi | 86% | 2641 fps | 100% |
| Accurate 2495 | <<locked>> | 96% | 51,866 psi | 88% | 2674 fps | 100% |
| Accurate 2520 | <<locked>> | 90% | 51,793 psi | 88% | 2697 fps | 100% |
| Accurate 4064 | <<locked>> | 98% | 51,401 psi | 88% | 2703 fps | 100% |
| Accurate LT-30 | <<locked>> | 84% | 53,055 psi | 90% | 2579 fps | 100% |
| Accurate LT-32 | <<locked>> | 82% | 50,140 psi | 85% | 2552 fps | 99.9% |
| ADI AR 2206H | <<locked>> | 92% | 51,227 psi | 87% | 2694 fps | 98.7% |
| ADI AR 2208 | <<locked>> | 98% | 52,272 psi | 89% | 2690 fps | 98.2% |
| ADI AR 2219 | <<locked>> | 84% | 53,040 psi | 90% | 2690 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 90% | 50,749 psi | 86% | 2657 fps | 99.4% |
| Alliant AR-Comp | <<locked>> | 90% | 49,705 psi | 85% | 2648 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 86% | 52,083 psi | 89% | 2756 fps | 99.2% |
| Alliant Power Pro 2000-MR | <<locked>> | 94% | 50,502 psi | 86% | 2785 fps | 97.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 98% | 51,010 psi | 87% | 2707 fps | 99.3% |
| Alliant Reloder-10x | <<locked>> | 86% | 52,257 psi | 89% | 2631 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 96% | 52,025 psi | 89% | 2726 fps | 98.4% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 48,182 psi | 82% | 2749 fps | 98.7% |
| Baschieri & Pellagri 106 | <<locked>> | 84% | 51,764 psi | 88% | 2575 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 92% | 50,807 psi | 86% | 2703 fps | 97.7% |
| Bofors RP3 | <<locked>> | 98% | 51,082 psi | 87% | 2720 fps | 99.3% |
| Hodgdon Benchmark | <<locked>> | 88% | 50,082 psi | 85% | 2605 fps | 99.6% |
| Hodgdon BL-C2 | <<locked>> | 92% | 52,591 psi | 90% | 2736 fps | 99.8% |
| Hodgdon CFE223 | <<locked>> | 88% | 50,923 psi | 87% | 2769 fps | 98.3% |
| Hodgdon H322 | <<locked>> | 86% | 51,445 psi | 88% | 2667 fps | 100% |
| Hodgdon H335 | <<locked>> | 86% | 52,620 psi | 90% | 2694 fps | 100% |
| Hodgdon H380 | <<locked>> | 98% | 52,866 psi | 90% | 2726 fps | 97.4% |
| Hodgdon H4895 | <<locked>> | 92% | 51,605 psi | 88% | 2707 fps | 99.1% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 38,101 psi | 65% | 2490 fps | 96.1% |
| Hodgdon LEVERevolution | <<locked>> | 94% | 50,038 psi | 85% | 2733 fps | 99.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,084 psi | 58% | 1621 fps | 100% |
| Hodgdon VARGET | <<locked>> | 92% | 50,198 psi | 85% | 2664 fps | 98.9% |
| IMR 3031 | <<locked>> | 92% | 50,343 psi | 86% | 2700 fps | 100% |
| IMR 4064 | <<locked>> | 96% | 51,880 psi | 88% | 2677 fps | 98.4% |
| IMR 4198 | <<locked>> | 86% | 53,084 psi | 90% | 2598 fps | 100% |
| IMR 4895 | <<locked>> | 94% | 49,937 psi | 85% | 2707 fps | 98.6% |
| IMR 8208 XBR | <<locked>> | 90% | 50,749 psi | 86% | 2657 fps | 99.4% |
| Lovex D073.5 | <<locked>> | 86% | 50,488 psi | 86% | 2648 fps | 99.8% |
| Lovex D073.6 | <<locked>> | 92% | 49,559 psi | 84% | 2674 fps | 99.9% |
| Lovex S060 | <<locked>> | 92% | 52,199 psi | 89% | 2638 fps | 98.8% |
| Lovex S062 | <<locked>> | 96% | 50,908 psi | 87% | 2674 fps | 99.5% |
| Norma 200 | <<locked>> | 82% | 51,967 psi | 88% | 2605 fps | 100% |
| Norma 201 | <<locked>> | 92% | 49,777 psi | 85% | 2644 fps | 99.3% |
| Norma 202 | <<locked>> | 92% | 50,285 psi | 86% | 2657 fps | 100% |
| Norma 203B | <<locked>> | 96% | 51,126 psi | 87% | 2717 fps | 98.7% |
| Ramshot Big Game | <<locked>> | 96% | 51,488 psi | 88% | 2740 fps | 98.6% |
| Ramshot TAC | <<locked>> | 90% | 51,561 psi | 88% | 2667 fps | 96.4% |
| Ramshot Wild Boar | <<locked>> | 90% | 50,314 psi | 86% | 2687 fps | 98.5% |
| Ramshot X-Terminator | <<locked>> | 88% | 52,359 psi | 89% | 2664 fps | 98.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,142 psi | 58% | 1657 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 86% | 50,720 psi | 86% | 2651 fps | 99.9% |
| ReloadSwiss RS 52 | <<locked>> | 94% | 51,619 psi | 88% | 2789 fps | 98.4% |
| ReloadSwiss RS 60ᴾ | <<locked>> | 100% | 51,576 psi | 88% | 2818 fps | 100% |
| Rottweil R 901 | <<locked>> | 90% | 50,937 psi | 87% | 2641 fps | 100% |
| Rottweil R 902 | <<locked>> | 94% | 50,285 psi | 86% | 2644 fps | 99.4% |
| Rottweil R 903ᴾ | <<locked>> | 100% | 50,662 psi | 86% | 2707 fps | 99.1% |
| Shooters World Match Rifle | <<locked>> | 92% | 49,559 psi | 84% | 2674 fps | 99.9% |
| Shooters World Precision | <<locked>> | 96% | 50,908 psi | 87% | 2674 fps | 99.5% |
| Shooters World Tactical Rifle | <<locked>> | 84% | 50,444 psi | 86% | 2615 fps | 99.1% |
| SNPE Vectan SP 10 | <<locked>> | 82% | 49,690 psi | 85% | 2644 fps | 100% |
| SNPE Vectan SP 11ᴾ | <<locked>> | 100% | 52,808 psi | 90% | 2766 fps | 98.8% |
| SNPE Vectan SP 3 | <<locked>> | 84% | 50,198 psi | 85% | 2608 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 92% | 52,649 psi | 90% | 2690 fps | 97.2% |
| SNPE Vectan SP 9 | <<locked>> | 92% | 49,603 psi | 84% | 2664 fps | 98.4% |
| SNPE Vectan Tubal 3000 | <<locked>> | 92% | 52,533 psi | 89% | 2608 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 98% | 51,895 psi | 88% | 2602 fps | 100% |
| Somchem S321 | <<locked>> | 88% | 51,837 psi | 88% | 2694 fps | 99.6% |
| Somchem S335 | <<locked>> | 92% | 51,256 psi | 87% | 2605 fps | 100% |
| Somchem S341 | <<locked>> | 92% | 52,025 psi | 89% | 2687 fps | 98.7% |
| Somchem S355ᴾ | <<locked>> | 100% | 51,605 psi | 88% | 2707 fps | 99.1% |
| Somchem S365ᴾ | <<locked>> | 100% | 36,898 psi | 63% | 2533 fps | 97.3% |
| Vihtavuori N130 | <<locked>> | 88% | 52,620 psi | 90% | 2589 fps | 100% |
| Vihtavuori N133 | <<locked>> | 92% | 52,359 psi | 89% | 2598 fps | 100% |
| Vihtavuori N135 | <<locked>> | 96% | 52,431 psi | 89% | 2671 fps | 100% |
| Vihtavuori N140 | <<locked>> | 94% | 50,618 psi | 86% | 2638 fps | 100% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 49,951 psi | 85% | 2648 fps | 99.6% |
| Vihtavuori N530 | <<locked>> | 90% | 51,401 psi | 88% | 2661 fps | 99.5% |
| Vihtavuori N540 | <<locked>> | 96% | 52,170 psi | 89% | 2680 fps | 100% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 45,513 psi | 77% | 2589 fps | 98.1% |
| Winchester 748 | <<locked>> | 90% | 50,009 psi | 85% | 2700 fps | 99.8% |
| Winchester StaBALL Match | <<locked>> | 94% | 52,591 psi | 90% | 2726 fps | 99.2% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 23.62"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 80% | 37,942 psi | 65% | 2398 fps | 100% |
| Accurate 2200 | <<locked>> | 80% | 49,487 psi | 84% | 2654 fps | 97.7% |
| Accurate 2460 | <<locked>> | 80% | 41,162 psi | 70% | 2490 fps | 99.4% |
| Accurate 2495 | <<locked>> | 80% | 30,095 psi | 51% | 2293 fps | 99.5% |
| Accurate 2520 | <<locked>> | 80% | 36,506 psi | 62% | 2434 fps | 98.4% |
| Accurate 4064 | <<locked>> | 80% | 28,500 psi | 49% | 2270 fps | 97.1% |
| Accurate LT-30 | <<locked>> | 80% | 46,862 psi | 80% | 2490 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 47,268 psi | 80% | 2507 fps | 99.8% |
| ADI AR 2206H | <<locked>> | 82% | 37,246 psi | 63% | 2438 fps | 95.5% |
| ADI AR 2208 | <<locked>> | 90% | 40,828 psi | 70% | 2493 fps | 95.8% |
| ADI AR 2219 | <<locked>> | 80% | 46,079 psi | 78% | 2585 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 80% | 36,941 psi | 63% | 2408 fps | 96.8% |
| Alliant AR-Comp | <<locked>> | 80% | 35,404 psi | 60% | 2421 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 42,482 psi | 72% | 2592 fps | 97.7% |
| Alliant Power Pro 2000-MR | 50.9 gr | 88% | 41,321 psi | 70% | 2608 fps | 95.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 34,621 psi | 59% | 2408 fps | 95.8% |
| Alliant Reloder-10x | <<locked>> | 80% | 43,526 psi | 74% | 2500 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 37,753 psi | 64% | 2470 fps | 95.1% |
| Alliant Reloder-17 | <<locked>> | 92% | 36,956 psi | 63% | 2523 fps | 95.5% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 45,585 psi | 78% | 2484 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 41,437 psi | 71% | 2539 fps | 95.5% |
| Bofors RP3 | <<locked>> | 86% | 33,823 psi | 58% | 2405 fps | 95.7% |
| Hodgdon Benchmark | <<locked>> | 80% | 39,059 psi | 66% | 2411 fps | 97.9% |
| Hodgdon BL-C2 | <<locked>> | 80% | 34,563 psi | 59% | 2411 fps | 96.8% |
| Hodgdon CFE223 | 47.3 gr | 80% | 38,218 psi | 65% | 2530 fps | 95.1% |
| Hodgdon H322 | <<locked>> | 80% | 42,264 psi | 72% | 2523 fps | 99.9% |
| Hodgdon H335 | <<locked>> | 80% | 42,772 psi | 73% | 2539 fps | 99.7% |
| Hodgdon H380 | <<locked>> | 92% | 43,221 psi | 74% | 2566 fps | 95.2% |
| Hodgdon H4895 | <<locked>> | 80% | 35,099 psi | 60% | 2398 fps | 95.5% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 35,636 psi | 61% | 2438 fps | 95.2% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 33,489 psi | 57% | 2408 fps | 95.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,106 psi | 43% | 1444 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 36,172 psi | 62% | 2405 fps | 95.7% |
| IMR 3031 | <<locked>> | 80% | 33,634 psi | 57% | 2408 fps | 99.5% |
| IMR 4064 | <<locked>> | 86% | 37,768 psi | 64% | 2425 fps | 95.1% |
| IMR 4198 | <<locked>> | 80% | 44,440 psi | 76% | 2474 fps | 100% |
| IMR 4895 | <<locked>> | 84% | 36,114 psi | 61% | 2448 fps | 95.3% |
| IMR 8208 XBR | <<locked>> | 80% | 36,941 psi | 63% | 2408 fps | 96.8% |
| Lovex D073.5 | <<locked>> | 80% | 40,930 psi | 70% | 2490 fps | 98.7% |
| Lovex D073.6 | <<locked>> | 80% | 32,692 psi | 56% | 2362 fps | 97.4% |
| Lovex S060 | <<locked>> | 80% | 35,969 psi | 61% | 2343 fps | 95.1% |
| Lovex S062 | <<locked>> | 82% | 32,692 psi | 56% | 2329 fps | 95.6% |
| Norma 200 | <<locked>> | 80% | 48,950 psi | 83% | 2562 fps | 100% |
| Norma 201 | <<locked>> | 80% | 34,171 psi | 58% | 2349 fps | 96.1% |
| Norma 202 | <<locked>> | 80% | 34,113 psi | 58% | 2369 fps | 98.4% |
| Norma 203B | <<locked>> | 86% | 37,043 psi | 63% | 2461 fps | 95.5% |
| Ramshot Big Game | <<locked>> | 88% | 39,320 psi | 67% | 2523 fps | 95.9% |
| Ramshot TAC | <<locked>> | 88% | 48,167 psi | 82% | 2612 fps | 95.6% |
| Ramshot Wild Boar | <<locked>> | 82% | 38,174 psi | 65% | 2467 fps | 95.7% |
| Ramshot X-Terminator | <<locked>> | 80% | 40,074 psi | 68% | 2451 fps | 96.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,251 psi | 43% | 1480 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 41,713 psi | 71% | 2500 fps | 99.1% |
| ReloadSwiss RS 52 | 48.2 gr | 86% | 39,073 psi | 67% | 2559 fps | 95.4% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 30,240 psi | 51% | 2362 fps | 95.2% |
| Rottweil R 901 | <<locked>> | 80% | 37,463 psi | 64% | 2405 fps | 98.9% |
| Rottweil R 902 | <<locked>> | 80% | 32,271 psi | 55% | 2300 fps | 95.3% |
| Rottweil R 903 | <<locked>> | 88% | 33,765 psi | 57% | 2395 fps | 95.2% |
| Shooters World Match Rifle | <<locked>> | 80% | 32,692 psi | 56% | 2362 fps | 97.4% |
| Shooters World Precision | <<locked>> | 82% | 32,692 psi | 56% | 2329 fps | 95.6% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 43,918 psi | 75% | 2510 fps | 98.2% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 46,586 psi | 79% | 2595 fps | 99.9% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 38,043 psi | 65% | 2503 fps | 95.6% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 44,077 psi | 75% | 2516 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 88% | 45,600 psi | 78% | 2579 fps | 95.6% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 38,363 psi | 65% | 2461 fps | 95.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 35,926 psi | 61% | 2329 fps | 98.7% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 29,182 psi | 50% | 2195 fps | 97.9% |
| Somchem S321 | <<locked>> | 80% | 39,320 psi | 67% | 2480 fps | 97.8% |
| Somchem S335 | <<locked>> | 80% | 35,462 psi | 60% | 2336 fps | 99.2% |
| Somchem S341 | <<locked>> | 82% | 36,854 psi | 63% | 2421 fps | 95.2% |
| Somchem S355 | <<locked>> | 88% | 35,128 psi | 60% | 2408 fps | 95.4% |
| Somchem S365 | <<locked>> | 96% | 32,372 psi | 55% | 2425 fps | 95.5% |
| Vihtavuori N130 | <<locked>> | 80% | 40,930 psi | 70% | 2411 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 35,998 psi | 61% | 2336 fps | 99.9% |
| Vihtavuori N135 | <<locked>> | 80% | 30,980 psi | 53% | 2303 fps | 99.6% |
| Vihtavuori N140 | <<locked>> | 80% | 32,140 psi | 55% | 2306 fps | 98.2% |
| Vihtavuori N150 | <<locked>> | 86% | 31,444 psi | 54% | 2306 fps | 95.7% |
| Vihtavuori N530 | <<locked>> | 80% | 36,753 psi | 63% | 2402 fps | 96.9% |
| Vihtavuori N540 | <<locked>> | 80% | 30,777 psi | 52% | 2287 fps | 97.2% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 37,231 psi | 63% | 2428 fps | 95.7% |
| Winchester 748 | <<locked>> | 80% | 35,375 psi | 60% | 2431 fps | 97.4% |
| Winchester StaBALL Match | <<locked>> | 82% | 34,824 psi | 59% | 2405 fps | 95.4% |
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 82 powders for 8 x 64 S loaded with the .323 | 180gr | Hornady GMX. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,818 fps; across all powders the maximum-charge window runs from 1,621 fps to 2,818 fps. Alliant Reloder-17 gives the best case fill at 100 %, and 82 of the 82 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (405 MPa), the top charges use 58–90 %, leaving at least 10 % headroom. The 180.0 gr projectile in 0.323" calls for a 1:12.0 twist; slower twists will usually not stabilise this weight. Alliant Reloder-17, Hodgdon Hybrid 100V, Hodgdon TrailBoss 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 Power Pro 2000-MR, Hodgdon CFE223, ReloadSwiss RS 52 rank at the top here: for 8 x 64 S with the .323 | 180gr | Hornady GMX 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.