Load Specifications
Bullet:.323 | 180gr | Hornady GMX
Bullet Manufacturer:Hornady
Bullet Weight:180 gr
Bullet Diameter:0.323"
Bullet Length:<<locked>>
Caliber:8 x 57 IS load data
Case Length (l3):2.244"
Cartridge Length (C.O.L.):<<locked>>
Case Capacity:63 Grains of Water
Primer Size:Large Rifle (LR)
Barrel Length:23.62"
Max. allowed Pressure:56,565 psi
Recommended Twist Rate:1:12.0
Load data in caliber 8 x 57 IS with .323 | 180gr | Hornady GMX bullet and 86 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: 23.62"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 92% | 50,444 psi | 89% | 2562 fps | 100% |
| Accurate 2200 | <<locked>> | 82% | 48,501 psi | 86% | 2589 fps | 96.7% |
| Accurate 2230 | <<locked>> | 82% | 48,370 psi | 86% | 2592 fps | 97.1% |
| Accurate 2460 | <<locked>> | 88% | 48,863 psi | 86% | 2579 fps | 99.8% |
| Accurate 2495 | <<locked>> | 98% | 49,110 psi | 87% | 2605 fps | 100% |
| Accurate 2520 | <<locked>> | 92% | 49,864 psi | 88% | 2628 fps | 99.8% |
| Accurate 4064ᴾ | <<locked>> | 100% | 48,863 psi | 86% | 2635 fps | 100% |
| Accurate LT-30 | <<locked>> | 84% | 49,197 psi | 87% | 2480 fps | 100% |
| Accurate LT-32 | <<locked>> | 84% | 49,632 psi | 88% | 2497 fps | 99.7% |
| ADI AR 2206H | <<locked>> | 94% | 49,719 psi | 88% | 2628 fps | 97.9% |
| ADI AR 2207 | <<locked>> | 82% | 49,864 psi | 88% | 2507 fps | 100% |
| ADI AR 2208ᴾ | <<locked>> | 100% | 50,647 psi | 90% | 2618 fps | 97.3% |
| ADI AR 2219 | <<locked>> | 84% | 48,138 psi | 85% | 2582 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 92% | 49,429 psi | 87% | 2595 fps | 98.8% |
| Alliant AR-Comp | <<locked>> | 94% | 51,039 psi | 90% | 2638 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 88% | 50,140 psi | 89% | 2684 fps | 98.6% |
| Alliant Power Pro 2000-MR | <<locked>> | 96% | 49,153 psi | 87% | 2707 fps | 96.6% |
| Alliant Reloder- TS 15.5ᴾ | <<locked>> | 100% | 49,052 psi | 87% | 2638 fps | 98.6% |
| Alliant Reloder-10x | <<locked>> | 88% | 51,068 psi | 90% | 2579 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 98% | 50,169 psi | 89% | 2654 fps | 97.5% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 43,526 psi | 77% | 2612 fps | 96.7% |
| Alliant Reloder-7 | <<locked>> | 82% | 50,865 psi | 90% | 2520 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 86% | 51,082 psi | 90% | 2523 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 94% | 49,081 psi | 87% | 2631 fps | 96.6% |
| Bofors RP3ᴾ | <<locked>> | 100% | 48,588 psi | 86% | 2641 fps | 98.6% |
| Hodgdon Benchmark | <<locked>> | 90% | 48,936 psi | 87% | 2543 fps | 99.1% |
| Hodgdon BL-C2 | <<locked>> | 94% | 50,517 psi | 89% | 2664 fps | 99.4% |
| Hodgdon CFE223 | <<locked>> | 90% | 48,950 psi | 87% | 2690 fps | 97.2% |
| Hodgdon H322 | <<locked>> | 88% | 50,125 psi | 89% | 2612 fps | 100% |
| Hodgdon H335 | <<locked>> | 88% | 51,010 psi | 90% | 2631 fps | 100% |
| Hodgdon H380ᴾ | <<locked>> | 100% | 50,792 psi | 90% | 2648 fps | 96.1% |
| Hodgdon H4895 | <<locked>> | 94% | 50,038 psi | 88% | 2638 fps | 98.4% |
| Hodgdon LEVERevolution | <<locked>> | 96% | 48,124 psi | 85% | 2657 fps | 98.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 33,591 psi | 59% | 1575 fps | 100% |
| Hodgdon VARGET | <<locked>> | 94% | 48,805 psi | 86% | 2598 fps | 98.1% |
| IMR 3031 | <<locked>> | 94% | 48,240 psi | 85% | 2635 fps | 100% |
| IMR 4064 | <<locked>> | 98% | 50,299 psi | 89% | 2605 fps | 97.5% |
| IMR 4198 | <<locked>> | 86% | 49,342 psi | 87% | 2510 fps | 100% |
| IMR 4895 | <<locked>> | 96% | 48,124 psi | 85% | 2638 fps | 97.7% |
| IMR 8208 XBR | <<locked>> | 92% | 49,429 psi | 87% | 2595 fps | 98.8% |
| Lovex D073.4 | <<locked>> | 82% | 49,153 psi | 87% | 2589 fps | 99.6% |
| Lovex D073.5 | <<locked>> | 88% | 48,834 psi | 86% | 2582 fps | 99.3% |
| Lovex D073.6 | <<locked>> | 96% | 50,850 psi | 90% | 2654 fps | 99.8% |
| Lovex S060 | <<locked>> | 94% | 50,792 psi | 90% | 2569 fps | 98% |
| Lovex S062 | <<locked>> | 98% | 49,095 psi | 87% | 2605 fps | 98.9% |
| Norma 200 | <<locked>> | 84% | 50,894 psi | 90% | 2556 fps | 100% |
| Norma 201 | <<locked>> | 94% | 48,385 psi | 86% | 2579 fps | 98.7% |
| Norma 202 | <<locked>> | 94% | 48,414 psi | 86% | 2592 fps | 99.9% |
| Norma 203B | <<locked>> | 98% | 49,182 psi | 87% | 2644 fps | 97.8% |
| Ramshot Big Game | <<locked>> | 98% | 49,487 psi | 87% | 2661 fps | 97.6% |
| Ramshot Wild Boar | <<locked>> | 92% | 48,559 psi | 86% | 2615 fps | 97.6% |
| Ramshot X-Terminator | <<locked>> | 90% | 51,039 psi | 90% | 2595 fps | 97.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 33,620 psi | 59% | 1611 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 88% | 49,414 psi | 87% | 2592 fps | 99.6% |
| ReloadSwiss RS 52 | <<locked>> | 96% | 49,197 psi | 87% | 2707 fps | 97.3% |
| ReloadSwiss RS 60ᴾ | <<locked>> | 100% | 46,630 psi | 82% | 2684 fps | 99.5% |
| Rottweil R 901 | <<locked>> | 92% | 49,240 psi | 87% | 2575 fps | 99.8% |
| Rottweil R 902 | <<locked>> | 96% | 48,617 psi | 86% | 2575 fps | 98.7% |
| Rottweil R 903ᴾ | <<locked>> | 100% | 44,962 psi | 79% | 2575 fps | 97.7% |
| Shooters World AR Plus | <<locked>> | 82% | 49,153 psi | 87% | 2589 fps | 99.6% |
| Shooters World Match Rifle | <<locked>> | 96% | 50,850 psi | 90% | 2654 fps | 99.8% |
| Shooters World Precision | <<locked>> | 98% | 49,095 psi | 87% | 2605 fps | 98.9% |
| Shooters World Tactical Rifle | <<locked>> | 86% | 49,487 psi | 87% | 2556 fps | 98.5% |
| SNPE Vectan BA6 1/2 | <<locked>> | 82% | 50,821 psi | 90% | 2280 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 84% | 48,573 psi | 86% | 2589 fps | 99.8% |
| SNPE Vectan SP 11ᴾ | <<locked>> | 100% | 47,747 psi | 84% | 2641 fps | 97.3% |
| SNPE Vectan SP 3 | <<locked>> | 86% | 48,805 psi | 86% | 2549 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 94% | 50,952 psi | 90% | 2618 fps | 96% |
| SNPE Vectan SP 9 | <<locked>> | 94% | 48,109 psi | 85% | 2598 fps | 97.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 92% | 48,124 psi | 85% | 2503 fps | 99.8% |
| SNPE Vectan Tubal 5000ᴾ | <<locked>> | 100% | 50,357 psi | 89% | 2543 fps | 100% |
| Somchem S321 | <<locked>> | 90% | 50,241 psi | 89% | 2628 fps | 99.1% |
| Somchem S335 | <<locked>> | 94% | 49,922 psi | 88% | 2546 fps | 100% |
| Somchem S341 | <<locked>> | 94% | 50,256 psi | 89% | 2615 fps | 97.8% |
| Somchem S355ᴾ | <<locked>> | 100% | 46,398 psi | 82% | 2585 fps | 97.7% |
| Vihtavuori N120 | <<locked>> | 82% | 49,879 psi | 88% | 2461 fps | 100% |
| Vihtavuori N130 | <<locked>> | 88% | 48,370 psi | 86% | 2493 fps | 100% |
| Vihtavuori N133 | <<locked>> | 94% | 51,068 psi | 90% | 2546 fps | 100% |
| Vihtavuori N135 | <<locked>> | 98% | 49,922 psi | 88% | 2602 fps | 100% |
| Vihtavuori N140 | <<locked>> | 96% | 49,110 psi | 87% | 2579 fps | 100% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 44,643 psi | 79% | 2526 fps | 98.5% |
| Vihtavuori N530 | <<locked>> | 92% | 49,864 psi | 88% | 2595 fps | 98.9% |
| Vihtavuori N540 | <<locked>> | 98% | 50,314 psi | 89% | 2615 fps | 99.9% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 41,220 psi | 73% | 2461 fps | 96% |
| Winchester 748 | <<locked>> | 92% | 48,109 psi | 85% | 2631 fps | 99.3% |
| Winchester StaBALL Match | <<locked>> | 96% | 50,763 psi | 90% | 2657 fps | 98.5% |
Start Load - Barrel Length: 23.62"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 80% | 34,650 psi | 61% | 2303 fps | 99.7% |
| Accurate 2200 | <<locked>> | 80% | 45,368 psi | 80% | 2536 fps | 96% |
| Accurate 2230 | <<locked>> | 80% | 44,904 psi | 79% | 2536 fps | 96.4% |
| Accurate 2460 | <<locked>> | 80% | 37,260 psi | 66% | 2379 fps | 98.4% |
| Accurate 2495 | <<locked>> | 80% | 26,556 psi | 47% | 2182 fps | 98.3% |
| Accurate 2520 | <<locked>> | 80% | 32,561 psi | 58% | 2316 fps | 96.7% |
| Accurate 4064 | <<locked>> | 80% | 25,222 psi | 45% | 2156 fps | 95% |
| Accurate LT-30 | <<locked>> | 80% | 43,511 psi | 77% | 2395 fps | 99.9% |
| Accurate LT-32 | <<locked>> | 80% | 43,874 psi | 78% | 2408 fps | 99.1% |
| ADI AR 2206H | <<locked>> | 86% | 38,450 psi | 68% | 2425 fps | 95.1% |
| ADI AR 2207 | <<locked>> | 80% | 46,934 psi | 83% | 2467 fps | 100% |
| ADI AR 2208 | <<locked>> | 94% | 42,032 psi | 74% | 2474 fps | 95.2% |
| ADI AR 2219 | <<locked>> | 80% | 42,076 psi | 74% | 2484 fps | 99.8% |
| ADI Benchmark 8208 | <<locked>> | 80% | 33,779 psi | 60% | 2303 fps | 95% |
| Alliant AR-Comp | <<locked>> | 80% | 31,865 psi | 56% | 2320 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 38,479 psi | 68% | 2474 fps | 96% |
| Alliant Power Pro 2000-MR | <<locked>> | 94% | 45,774 psi | 81% | 2644 fps | 95.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 90% | 35,418 psi | 63% | 2392 fps | 95.3% |
| Alliant Reloder-10x | <<locked>> | 80% | 39,581 psi | 70% | 2402 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 92% | 41,263 psi | 73% | 2503 fps | 95.4% |
| Alliant Reloder-17 | <<locked>> | 98% | 40,785 psi | 72% | 2559 fps | 95.9% |
| Alliant Reloder-7 | <<locked>> | 80% | 47,950 psi | 85% | 2480 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 42,061 psi | 74% | 2388 fps | 99.9% |
| Baschieri & Pellagri 107 | <<locked>> | 90% | 43,033 psi | 76% | 2526 fps | 95% |
| Bofors RP3 | <<locked>> | 90% | 34,461 psi | 61% | 2385 fps | 95.1% |
| Hodgdon Benchmark | <<locked>> | 80% | 36,143 psi | 64% | 2313 fps | 96.5% |
| Hodgdon BL-C2 | <<locked>> | 82% | 33,344 psi | 59% | 2352 fps | 95.7% |
| Hodgdon CFE223 | <<locked>> | 86% | 42,743 psi | 76% | 2579 fps | 95.7% |
| Hodgdon H322 | <<locked>> | 80% | 38,247 psi | 68% | 2415 fps | 99.4% |
| Hodgdon H335 | <<locked>> | 80% | 38,812 psi | 69% | 2431 fps | 98.8% |
| Hodgdon H380 | <<locked>> | 98% | 47,529 psi | 84% | 2598 fps | 95.4% |
| Hodgdon H4895 | <<locked>> | 84% | 36,434 psi | 64% | 2392 fps | 95.2% |
| Hodgdon LEVERevolution | <<locked>> | 88% | 37,014 psi | 65% | 2451 fps | 95.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 24,627 psi | 44% | 1401 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 37,623 psi | 67% | 2398 fps | 95.4% |
| IMR 3031 | <<locked>> | 80% | 30,269 psi | 54% | 2297 fps | 98.4% |
| IMR 4064 | <<locked>> | 92% | 41,611 psi | 74% | 2461 fps | 95.4% |
| IMR 4198 | <<locked>> | 80% | 41,147 psi | 73% | 2385 fps | 100% |
| IMR 4895 | <<locked>> | 90% | 39,552 psi | 70% | 2484 fps | 95.6% |
| IMR 8208 XBR | <<locked>> | 80% | 33,779 psi | 60% | 2303 fps | 95% |
| Lovex D073.4 | <<locked>> | 80% | 45,614 psi | 81% | 2533 fps | 99.3% |
| Lovex D073.5 | <<locked>> | 80% | 37,028 psi | 65% | 2375 fps | 97.2% |
| Lovex D073.6 | <<locked>> | 80% | 29,254 psi | 52% | 2251 fps | 95.4% |
| Lovex S060 | <<locked>> | 86% | 39,987 psi | 71% | 2385 fps | 95.6% |
| Lovex S062 | <<locked>> | 86% | 33,576 psi | 59% | 2316 fps | 95.1% |
| Norma 200 | <<locked>> | 80% | 44,657 psi | 79% | 2464 fps | 100% |
| Norma 201 | <<locked>> | 84% | 35,331 psi | 62% | 2339 fps | 95.7% |
| Norma 202 | <<locked>> | 80% | 30,835 psi | 55% | 2260 fps | 96.8% |
| Norma 203B | <<locked>> | 90% | 37,898 psi | 67% | 2441 fps | 95% |
| Ramshot Big Game | <<locked>> | 92% | 40,625 psi | 72% | 2507 fps | 95.4% |
| Ramshot Wild Boar | <<locked>> | 86% | 39,798 psi | 70% | 2461 fps | 95.4% |
| Ramshot X-Terminator | <<locked>> | 82% | 39,305 psi | 69% | 2395 fps | 95.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 24,758 psi | 44% | 1437 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 38,130 psi | 67% | 2395 fps | 97.9% |
| ReloadSwiss RS 52 | <<locked>> | 92% | 43,047 psi | 76% | 2598 fps | 95.8% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 33,489 psi | 59% | 2405 fps | 95.8% |
| Rottweil R 901 | <<locked>> | 80% | 34,272 psi | 61% | 2300 fps | 97.6% |
| Rottweil R 902 | <<locked>> | 84% | 33,475 psi | 59% | 2293 fps | 95% |
| Rottweil R 903 | <<locked>> | 94% | 36,825 psi | 65% | 2428 fps | 95.5% |
| Shooters World AR Plus | <<locked>> | 80% | 45,614 psi | 81% | 2533 fps | 99.3% |
| Shooters World Match Rifle | <<locked>> | 80% | 29,254 psi | 52% | 2251 fps | 95.4% |
| Shooters World Precision | <<locked>> | 86% | 33,576 psi | 59% | 2316 fps | 95.1% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 40,364 psi | 71% | 2405 fps | 96.7% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 48,240 psi | 85% | 2247 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 42,453 psi | 75% | 2487 fps | 99.3% |
| SNPE Vectan SP 11 | <<locked>> | 94% | 39,218 psi | 69% | 2484 fps | 95% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 40,379 psi | 71% | 2415 fps | 99.9% |
| SNPE Vectan SP 7 | <<locked>> | 92% | 47,355 psi | 84% | 2562 fps | 95.2% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 39,726 psi | 70% | 2451 fps | 95.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 33,011 psi | 58% | 2231 fps | 97.4% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 26,629 psi | 47% | 2100 fps | 96.2% |
| Somchem S321 | <<locked>> | 80% | 35,723 psi | 63% | 2369 fps | 96.1% |
| Somchem S335 | <<locked>> | 80% | 32,300 psi | 57% | 2234 fps | 98% |
| Somchem S341 | <<locked>> | 88% | 40,814 psi | 72% | 2461 fps | 95.6% |
| Somchem S355 | <<locked>> | 94% | 38,334 psi | 68% | 2441 fps | 95.7% |
| Vihtavuori N120 | <<locked>> | 80% | 46,992 psi | 83% | 2421 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 37,681 psi | 67% | 2320 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 32,953 psi | 58% | 2241 fps | 99.4% |
| Vihtavuori N135 | <<locked>> | 80% | 27,818 psi | 49% | 2201 fps | 98.5% |
| Vihtavuori N140 | <<locked>> | 80% | 29,080 psi | 51% | 2201 fps | 96.6% |
| Vihtavuori N150 | <<locked>> | 90% | 32,068 psi | 57% | 2287 fps | 95.1% |
| Vihtavuori N530 | <<locked>> | 80% | 33,388 psi | 59% | 2293 fps | 95% |
| Vihtavuori N540 | <<locked>> | 80% | 27,847 psi | 49% | 2182 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 38,725 psi | 68% | 2408 fps | 95.1% |
| Winchester 748 | <<locked>> | 80% | 32,024 psi | 57% | 2320 fps | 95.4% |
| Winchester StaBALL Match | <<locked>> | 86% | 36,158 psi | 64% | 2398 fps | 95% |
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 102 powders for 8 x 57 IS loaded with the .323 | 180gr | Hornady GMX. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,707 fps; across all powders the maximum-charge window runs from 1,575 fps to 2,707 fps. Accurate 4064 gives the best case fill at 100 %, and 102 of the 102 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (390 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. Accurate 4064, Accurate 4350, ADI AR 2208 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. As outliers, Accurate 2700, Accurate 4350, Alliant Reloder-16 burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.