Load Specifications
Load data in caliber 8 x 57 IS with .323 | 185gr | Prvi Partizan Grom bullet and 80 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 52, Alliant Power Pro 2000-MR and Hodgdon LEVERevolution.
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>> | 88% | 49,008 psi | 87% | 2513 fps | 100% |
| Accurate 2460 | <<locked>> | 86% | 50,299 psi | 89% | 2572 fps | 100% |
| Accurate 2495 | <<locked>> | 94% | 48,559 psi | 86% | 2562 fps | 100% |
| Accurate 2520 | <<locked>> | 88% | 48,008 psi | 85% | 2575 fps | 99.8% |
| Accurate 4064 | <<locked>> | 96% | 48,240 psi | 85% | 2595 fps | 100% |
| Accurate LT-30 | <<locked>> | 82% | 49,690 psi | 88% | 2467 fps | 100% |
| Accurate LT-32 | <<locked>> | 82% | 50,067 psi | 89% | 2487 fps | 99.9% |
| ADI AR 2206H | <<locked>> | 92% | 50,981 psi | 90% | 2625 fps | 98.6% |
| ADI AR 2208 | <<locked>> | 96% | 48,791 psi | 86% | 2569 fps | 97.5% |
| ADI AR 2219 | <<locked>> | 82% | 48,994 psi | 87% | 2569 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 90% | 50,575 psi | 89% | 2589 fps | 99.3% |
| Alliant AR-Comp | <<locked>> | 90% | 49,516 psi | 88% | 2585 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 84% | 48,414 psi | 86% | 2631 fps | 98.7% |
| Alliant Power Pro 2000-MR | <<locked>> | 94% | 50,140 psi | 89% | 2710 fps | 97.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 98% | 50,676 psi | 90% | 2638 fps | 99.2% |
| Alliant Reloder-10x | <<locked>> | 84% | 49,008 psi | 87% | 2523 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 94% | 48,312 psi | 85% | 2605 fps | 97.7% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 47,921 psi | 85% | 2680 fps | 98.5% |
| Baschieri & Pellagri 106 | <<locked>> | 82% | 48,515 psi | 86% | 2467 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 92% | 50,328 psi | 89% | 2631 fps | 97.5% |
| Bofors RP3 | <<locked>> | 98% | 50,430 psi | 89% | 2648 fps | 99.2% |
| Hodgdon Benchmark | <<locked>> | 88% | 50,038 psi | 88% | 2539 fps | 99.5% |
| Hodgdon BL-C2 | <<locked>> | 90% | 48,660 psi | 86% | 2612 fps | 99.5% |
| Hodgdon CFE223 | <<locked>> | 88% | 50,111 psi | 89% | 2687 fps | 98% |
| Hodgdon H322 | <<locked>> | 84% | 47,790 psi | 84% | 2549 fps | 100% |
| Hodgdon H335 | <<locked>> | 84% | 48,878 psi | 86% | 2575 fps | 100% |
| Hodgdon H380 | <<locked>> | 96% | 49,037 psi | 87% | 2602 fps | 96.5% |
| Hodgdon H4895 | <<locked>> | 90% | 48,327 psi | 85% | 2589 fps | 98.6% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 38,029 psi | 67% | 2428 fps | 95.9% |
| Hodgdon LEVERevolution | <<locked>> | 94% | 49,530 psi | 88% | 2657 fps | 99.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,287 psi | 61% | 1575 fps | 100% |
| Hodgdon VARGET | <<locked>> | 92% | 49,835 psi | 88% | 2595 fps | 98.7% |
| IMR 3031 | <<locked>> | 92% | 50,009 psi | 88% | 2631 fps | 100% |
| IMR 4064 | <<locked>> | 94% | 48,254 psi | 85% | 2556 fps | 97.7% |
| IMR 4198 | <<locked>> | 84% | 49,850 psi | 88% | 2490 fps | 100% |
| IMR 4895 | <<locked>> | 94% | 49,516 psi | 88% | 2635 fps | 98.5% |
| IMR 8208 XBR | <<locked>> | 90% | 50,575 psi | 89% | 2589 fps | 99.3% |
| Lovex D073.5 | <<locked>> | 86% | 50,154 psi | 89% | 2575 fps | 99.7% |
| Lovex D073.6 | <<locked>> | 92% | 49,530 psi | 88% | 2608 fps | 99.9% |
| Lovex S060 | <<locked>> | 90% | 48,733 psi | 86% | 2520 fps | 98.2% |
| Lovex S062 | <<locked>> | 96% | 50,517 psi | 89% | 2602 fps | 99.4% |
| Norma 201 | <<locked>> | 92% | 49,908 psi | 88% | 2579 fps | 99.3% |
| Norma 202 | <<locked>> | 92% | 49,864 psi | 88% | 2589 fps | 100% |
| Norma 203B | <<locked>> | 96% | 50,778 psi | 90% | 2644 fps | 98.6% |
| Ramshot Big Game | <<locked>> | 96% | 50,952 psi | 90% | 2667 fps | 98.4% |
| Ramshot TAC | <<locked>> | 90% | 51,053 psi | 90% | 2592 fps | 96.1% |
| Ramshot Wild Boar | <<locked>> | 90% | 49,937 psi | 88% | 2618 fps | 98.4% |
| Ramshot X-Terminator | <<locked>> | 86% | 48,733 psi | 86% | 2543 fps | 98% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,432 psi | 61% | 1611 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 86% | 50,401 psi | 89% | 2582 fps | 99.8% |
| ReloadSwiss RS 52 | <<locked>> | 94% | 50,850 psi | 90% | 2710 fps | 98.2% |
| ReloadSwiss RS 60 | <<locked>> | 98% | 47,863 psi | 85% | 2690 fps | 99.9% |
| Rottweil R 901 | <<locked>> | 88% | 48,211 psi | 85% | 2533 fps | 99.9% |
| Rottweil R 902 | <<locked>> | 94% | 50,096 psi | 89% | 2575 fps | 99.3% |
| Rottweil R 903ᴾ | <<locked>> | 100% | 50,270 psi | 89% | 2635 fps | 99% |
| Shooters World Match Rifle | <<locked>> | 92% | 49,530 psi | 88% | 2608 fps | 99.9% |
| Shooters World Precision | <<locked>> | 96% | 50,517 psi | 89% | 2602 fps | 99.4% |
| Shooters World Tactical Rifle | <<locked>> | 84% | 50,256 psi | 89% | 2549 fps | 99% |
| SNPE Vectan SP 10 | <<locked>> | 82% | 49,400 psi | 87% | 2575 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 98% | 48,892 psi | 86% | 2641 fps | 98.2% |
| SNPE Vectan SP 3 | <<locked>> | 84% | 49,835 psi | 88% | 2539 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 90% | 48,863 psi | 86% | 2566 fps | 96.3% |
| SNPE Vectan SP 9 | <<locked>> | 92% | 49,487 psi | 87% | 2598 fps | 98.3% |
| SNPE Vectan Tubal 3000 | <<locked>> | 90% | 49,356 psi | 87% | 2500 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 96% | 48,443 psi | 86% | 2493 fps | 100% |
| Somchem S321 | <<locked>> | 86% | 48,167 psi | 85% | 2572 fps | 99.2% |
| Somchem S335 | <<locked>> | 90% | 48,269 psi | 85% | 2497 fps | 100% |
| Somchem S341 | <<locked>> | 90% | 48,138 psi | 85% | 2566 fps | 98% |
| Somchem S355ᴾ | <<locked>> | 100% | 51,155 psi | 90% | 2638 fps | 98.9% |
| Somchem S365ᴾ | <<locked>> | 100% | 36,854 psi | 65% | 2470 fps | 97.2% |
| Vihtavuori N130 | <<locked>> | 86% | 49,211 psi | 87% | 2477 fps | 100% |
| Vihtavuori N133 | <<locked>> | 90% | 49,168 psi | 87% | 2493 fps | 100% |
| Vihtavuori N135 | <<locked>> | 94% | 48,762 psi | 86% | 2556 fps | 100% |
| Vihtavuori N140 | <<locked>> | 94% | 50,343 psi | 89% | 2569 fps | 100% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 49,501 psi | 88% | 2579 fps | 99.5% |
| Vihtavuori N530 | <<locked>> | 90% | 50,981 psi | 90% | 2589 fps | 99.4% |
| Vihtavuori N540 | <<locked>> | 94% | 48,660 psi | 86% | 2566 fps | 100% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 45,266 psi | 80% | 2520 fps | 97.9% |
| Winchester 748 | <<locked>> | 90% | 49,487 psi | 87% | 2628 fps | 99.7% |
| Winchester StaBALL Match | <<locked>> | 92% | 48,718 psi | 86% | 2605 fps | 98.7% |
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% | 38,130 psi | 67% | 2339 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 41,278 psi | 73% | 2428 fps | 99.4% |
| Accurate 2495 | <<locked>> | 80% | 30,574 psi | 54% | 2244 fps | 99.5% |
| Accurate 2520 | <<locked>> | 80% | 36,666 psi | 65% | 2379 fps | 98.4% |
| Accurate 4064 | <<locked>> | 80% | 28,935 psi | 51% | 2221 fps | 97.2% |
| Accurate LT-30 | <<locked>> | 80% | 46,717 psi | 83% | 2425 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 47,094 psi | 83% | 2441 fps | 99.7% |
| ADI AR 2206H | <<locked>> | 82% | 37,405 psi | 66% | 2382 fps | 95.5% |
| ADI AR 2208 | <<locked>> | 90% | 40,669 psi | 72% | 2428 fps | 95.6% |
| ADI AR 2219 | <<locked>> | 80% | 46,006 psi | 81% | 2523 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 80% | 36,941 psi | 65% | 2349 fps | 96.7% |
| Alliant AR-Comp | <<locked>> | 80% | 35,476 psi | 63% | 2365 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 42,366 psi | 75% | 2526 fps | 97.6% |
| Alliant Power Pro 2000-MR | 48.3 gr | 88% | 41,060 psi | 73% | 2539 fps | 95.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 34,693 psi | 61% | 2349 fps | 95.7% |
| Alliant Reloder-10x | <<locked>> | 80% | 43,482 psi | 77% | 2438 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 88% | 40,001 psi | 71% | 2454 fps | 95.7% |
| Alliant Reloder-17 | <<locked>> | 92% | 36,767 psi | 65% | 2454 fps | 95.3% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 45,498 psi | 80% | 2421 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 41,321 psi | 73% | 2477 fps | 95.3% |
| Bofors RP3 | <<locked>> | 86% | 33,939 psi | 60% | 2346 fps | 95.6% |
| Hodgdon Benchmark | <<locked>> | 80% | 39,233 psi | 69% | 2352 fps | 97.9% |
| Hodgdon BL-C2 | <<locked>> | 80% | 34,693 psi | 61% | 2356 fps | 96.8% |
| Hodgdon CFE223 | <<locked>> | 82% | 40,973 psi | 72% | 2526 fps | 95.9% |
| Hodgdon H322 | <<locked>> | 80% | 42,076 psi | 74% | 2457 fps | 99.9% |
| Hodgdon H335 | <<locked>> | 80% | 42,482 psi | 75% | 2474 fps | 99.6% |
| Hodgdon H380 | <<locked>> | 92% | 43,004 psi | 76% | 2500 fps | 95% |
| Hodgdon H4895 | <<locked>> | 80% | 35,186 psi | 62% | 2339 fps | 95.4% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 35,795 psi | 63% | 2379 fps | 95% |
| Hodgdon LEVERevolution | 44.1 gr | 82% | 33,431 psi | 59% | 2346 fps | 95.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,367 psi | 45% | 1404 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 36,216 psi | 64% | 2346 fps | 95.6% |
| IMR 3031 | <<locked>> | 80% | 33,750 psi | 60% | 2352 fps | 99.5% |
| IMR 4064 | <<locked>> | 86% | 37,724 psi | 67% | 2362 fps | 95% |
| IMR 4198 | <<locked>> | 80% | 44,483 psi | 79% | 2411 fps | 100% |
| IMR 4895 | <<locked>> | 84% | 36,158 psi | 64% | 2388 fps | 95.2% |
| IMR 8208 XBR | <<locked>> | 80% | 36,941 psi | 65% | 2349 fps | 96.7% |
| Lovex D073.5 | <<locked>> | 80% | 40,944 psi | 72% | 2428 fps | 98.6% |
| Lovex D073.6 | <<locked>> | 80% | 32,996 psi | 58% | 2310 fps | 97.4% |
| Lovex S060 | <<locked>> | 80% | 36,143 psi | 64% | 2287 fps | 95% |
| Lovex S062 | <<locked>> | 82% | 32,880 psi | 58% | 2277 fps | 95.5% |
| Norma 201 | <<locked>> | 80% | 34,330 psi | 61% | 2293 fps | 96% |
| Norma 202 | <<locked>> | 80% | 34,360 psi | 61% | 2313 fps | 98.4% |
| Norma 203B | <<locked>> | 86% | 36,912 psi | 65% | 2398 fps | 95.4% |
| Ramshot Big Game | <<locked>> | 88% | 39,131 psi | 69% | 2457 fps | 95.7% |
| Ramshot TAC | <<locked>> | 88% | 47,892 psi | 85% | 2543 fps | 95.4% |
| Ramshot Wild Boar | <<locked>> | 82% | 38,087 psi | 67% | 2405 fps | 95.6% |
| Ramshot X-Terminator | <<locked>> | 80% | 40,147 psi | 71% | 2392 fps | 96.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,599 psi | 45% | 1440 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 41,452 psi | 73% | 2434 fps | 99% |
| ReloadSwiss RS 52 | 45.8 gr | 86% | 39,015 psi | 69% | 2497 fps | 95.3% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 30,385 psi | 54% | 2306 fps | 95.1% |
| Rottweil R 901 | <<locked>> | 80% | 38,072 psi | 67% | 2352 fps | 98.9% |
| Rottweil R 902 | <<locked>> | 80% | 32,634 psi | 58% | 2247 fps | 95.4% |
| Rottweil R 903 | <<locked>> | 88% | 34,040 psi | 60% | 2343 fps | 95.2% |
| Shooters World Match Rifle | <<locked>> | 80% | 32,996 psi | 58% | 2310 fps | 97.4% |
| Shooters World Precision | <<locked>> | 82% | 32,880 psi | 58% | 2277 fps | 95.5% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 43,918 psi | 78% | 2444 fps | 98.1% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 46,224 psi | 82% | 2526 fps | 99.9% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 38,043 psi | 67% | 2441 fps | 95.4% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 44,164 psi | 78% | 2451 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 88% | 45,687 psi | 81% | 2516 fps | 95.5% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 38,247 psi | 68% | 2398 fps | 95.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 36,260 psi | 64% | 2274 fps | 98.7% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 29,501 psi | 52% | 2149 fps | 97.9% |
| Somchem S321 | <<locked>> | 80% | 39,479 psi | 70% | 2421 fps | 97.8% |
| Somchem S335 | <<locked>> | 80% | 35,534 psi | 63% | 2277 fps | 99.2% |
| Somchem S341 | <<locked>> | 82% | 36,840 psi | 65% | 2362 fps | 95.1% |
| Somchem S355 | <<locked>> | 88% | 35,360 psi | 63% | 2352 fps | 95.4% |
| Somchem S365 | <<locked>> | 96% | 32,445 psi | 57% | 2365 fps | 95.4% |
| Vihtavuori N130 | <<locked>> | 80% | 41,147 psi | 73% | 2356 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 36,216 psi | 64% | 2283 fps | 99.9% |
| Vihtavuori N135 | <<locked>> | 80% | 31,328 psi | 55% | 2254 fps | 99.6% |
| Vihtavuori N140 | <<locked>> | 80% | 32,387 psi | 57% | 2254 fps | 98.2% |
| Vihtavuori N150 | <<locked>> | 86% | 31,401 psi | 56% | 2247 fps | 95.6% |
| Vihtavuori N530 | <<locked>> | 80% | 36,825 psi | 65% | 2343 fps | 96.8% |
| Vihtavuori N540 | <<locked>> | 80% | 31,024 psi | 55% | 2234 fps | 97.2% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 37,086 psi | 66% | 2365 fps | 95.5% |
| Winchester 748 | <<locked>> | 80% | 35,563 psi | 63% | 2379 fps | 97.4% |
| Winchester StaBALL Match | <<locked>> | 82% | 34,969 psi | 62% | 2349 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 80 powders for 8 x 57 IS loaded with the .323 | 185gr | Prvi Partizan Grom. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,710 fps; across all powders the maximum-charge window runs from 1,575 fps to 2,710 fps. Alliant Reloder-17 gives the best case fill at 100 %, and 80 of the 80 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (390 MPa), the top charges use 61–90 %, leaving at least 10 % headroom. The 185.0 gr projectile in 0.323" calls for a 1:13.5 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. ReloadSwiss RS 52, Alliant Power Pro 2000-MR, Hodgdon LEVERevolution rank at the top here: for 8 x 57 IS with the .323 | 185gr | Prvi Partizan Grom 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.