Load Specifications
Load data in caliber 7 x 57 with .285 | 173gr | Prvi Partizan SP bullet and 77 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 70, Alliant Reloder-26 and Hodgdon Superformance.
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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Max Load - Barrel Length: 23.62"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2495 | <<locked>> | 82% | 49,313 psi | 87% | 2415 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 50,894 psi | 90% | 2464 fps | 97.8% |
| Accurate 3100ᴾ | <<locked>> | 100% | 46,601 psi | 82% | 2490 fps | 98.6% |
| Accurate 4064 | <<locked>> | 84% | 49,719 psi | 88% | 2461 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 49,226 psi | 87% | 2543 fps | 99.8% |
| ADI AR 2208 | <<locked>> | 86% | 50,618 psi | 89% | 2490 fps | 100% |
| ADI AR 2209 | <<locked>> | 98% | 50,575 psi | 89% | 2572 fps | 96.9% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 48,704 psi | 86% | 2589 fps | 99.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 50,662 psi | 90% | 2507 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 51,024 psi | 90% | 2526 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 50,531 psi | 89% | 2598 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 90% | 51,169 psi | 90% | 2621 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 49,821 psi | 88% | 2566 fps | 97% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 46,528 psi | 82% | 2559 fps | 96.4% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 43,947 psi | 78% | 2513 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 38,566 psi | 68% | 2428 fps | 97.4% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 49,545 psi | 88% | 2677 fps | 99.9% |
| Bofors RP3 | <<locked>> | 86% | 51,184 psi | 90% | 2523 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 46,528 psi | 82% | 2559 fps | 96.4% |
| Bofors RP7 | <<locked>> | 90% | 51,140 psi | 90% | 2503 fps | 98.1% |
| Hodgdon H380 | <<locked>> | 84% | 48,428 psi | 86% | 2484 fps | 99.5% |
| Hodgdon H414 | <<locked>> | 90% | 48,486 psi | 86% | 2539 fps | 98.2% |
| Hodgdon H4350 | <<locked>> | 88% | 49,023 psi | 87% | 2507 fps | 97.1% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 50,256 psi | 89% | 2530 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 49,240 psi | 87% | 2520 fps | 100% |
| Hodgdon Superformance | <<locked>> | 90% | 48,066 psi | 85% | 2566 fps | 97.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,998 psi | 64% | 1555 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 50,894 psi | 90% | 2493 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 50,024 psi | 88% | 2470 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 49,414 psi | 87% | 2451 fps | 98.2% |
| IMR 4350 | <<locked>> | 92% | 48,544 psi | 86% | 2484 fps | 97.6% |
| IMR 4451 Enduron | <<locked>> | 88% | 49,734 psi | 88% | 2484 fps | 98.2% |
| IMR 4831 | <<locked>> | 94% | 49,893 psi | 88% | 2539 fps | 99.9% |
| IMR 4895 | <<locked>> | 82% | 49,066 psi | 87% | 2503 fps | 100% |
| Lovex S062 | <<locked>> | 84% | 50,125 psi | 89% | 2470 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 49,327 psi | 87% | 2480 fps | 99.1% |
| Lovex S070 | <<locked>> | 92% | 50,227 psi | 89% | 2513 fps | 98.6% |
| Lovex S071ᴾ | <<locked>> | 100% | 38,798 psi | 69% | 2356 fps | 96.9% |
| Norma 203B | <<locked>> | 84% | 50,314 psi | 89% | 2513 fps | 100% |
| Norma 204 | <<locked>> | 92% | 48,428 psi | 86% | 2520 fps | 96.4% |
| Norma MRPᴾ | <<locked>> | 100% | 49,327 psi | 87% | 2638 fps | 98.3% |
| Norma URP | <<locked>> | 92% | 48,501 psi | 86% | 2533 fps | 99.7% |
| Ramshot Big Game | <<locked>> | 84% | 50,401 psi | 89% | 2536 fps | 100% |
| Ramshot Hunter | <<locked>> | 94% | 50,328 psi | 89% | 2579 fps | 99.1% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,521 psi | 65% | 1591 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 48,675 psi | 86% | 2470 fps | 98.6% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 51,082 psi | 90% | 2618 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 48,834 psi | 86% | 2566 fps | 99.7% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 47,921 psi | 85% | 2585 fps | 99.5% |
| Rottweil R 902 | <<locked>> | 82% | 48,820 psi | 86% | 2434 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 51,068 psi | 90% | 2516 fps | 100% |
| Rottweil R 905 | <<locked>> | 98% | 48,617 psi | 86% | 2549 fps | 96.9% |
| Rottweil R 907 | <<locked>> | 90% | 51,140 psi | 90% | 2503 fps | 98.1% |
| Shooters World Long Rifle | <<locked>> | 90% | 49,327 psi | 87% | 2480 fps | 99.1% |
| Shooters World Precision | <<locked>> | 84% | 50,125 psi | 89% | 2470 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 50,227 psi | 89% | 2513 fps | 98.6% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 49,240 psi | 87% | 2523 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 50,807 psi | 90% | 2500 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 49,966 psi | 88% | 2382 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 49,037 psi | 87% | 2434 fps | 98.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 48,138 psi | 85% | 2543 fps | 96.8% |
| Somchem S355 | <<locked>> | 86% | 48,472 psi | 86% | 2470 fps | 100% |
| Somchem S365 | <<locked>> | 96% | 49,995 psi | 88% | 2582 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 49,356 psi | 87% | 2530 fps | 97.8% |
| Vihtavuori N135 | <<locked>> | 82% | 48,950 psi | 87% | 2402 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 49,356 psi | 87% | 2418 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 49,269 psi | 87% | 2448 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 50,633 psi | 90% | 2530 fps | 99.8% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 45,484 psi | 80% | 2457 fps | 96.5% |
| Vihtavuori N540 | <<locked>> | 84% | 50,531 psi | 89% | 2457 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 49,719 psi | 88% | 2533 fps | 99.7% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 48,979 psi | 87% | 2582 fps | 100% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 50,212 psi | 89% | 2507 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 48,486 psi | 86% | 2539 fps | 98.2% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 39,421 psi | 70% | 2546 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 50,691 psi | 90% | 2510 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 49,298 psi | 87% | 2520 fps | 96.6% |
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 2495 | <<locked>> | 80% | 46,224 psi | 82% | 2369 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 44,918 psi | 79% | 2369 fps | 96.6% |
| Accurate 3100 | <<locked>> | 90% | 33,257 psi | 59% | 2244 fps | 95% |
| Accurate 4064 | <<locked>> | 80% | 43,714 psi | 77% | 2375 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 32,663 psi | 58% | 2241 fps | 96.8% |
| ADI AR 2208 | <<locked>> | 80% | 41,843 psi | 74% | 2346 fps | 99.3% |
| ADI AR 2209 | <<locked>> | 94% | 44,469 psi | 79% | 2470 fps | 95.4% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 45,324 psi | 80% | 2530 fps | 99.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 42,134 psi | 74% | 2372 fps | 99.9% |
| Alliant Reloder-15 | <<locked>> | 80% | 44,947 psi | 79% | 2428 fps | 99.7% |
| Alliant Reloder-16 | <<locked>> | 80% | 32,692 psi | 58% | 2251 fps | 96.9% |
| Alliant Reloder-17 | <<locked>> | 80% | 36,550 psi | 65% | 2365 fps | 99.4% |
| Alliant Reloder-19 | <<locked>> | 94% | 43,932 psi | 78% | 2467 fps | 95.5% |
| Alliant Reloder-22 | <<locked>> | 98% | 43,613 psi | 77% | 2507 fps | 95.6% |
| Alliant Reloder-23 | <<locked>> | 84% | 26,832 psi | 47% | 2129 fps | 95.9% |
| Alliant Reloder-25 | <<locked>> | 96% | 34,127 psi | 60% | 2326 fps | 95.6% |
| Alliant Reloder-26 | 46.1 gr | 86% | 30,414 psi | 54% | 2277 fps | 95% |
| Bofors RP3 | <<locked>> | 80% | 42,105 psi | 74% | 2382 fps | 99.9% |
| Bofors RP5 | <<locked>> | 98% | 43,613 psi | 77% | 2507 fps | 95.6% |
| Bofors RP7 | <<locked>> | 82% | 40,001 psi | 71% | 2310 fps | 95.5% |
| Hodgdon H380 | <<locked>> | 80% | 42,598 psi | 75% | 2385 fps | 98.7% |
| Hodgdon H414 | <<locked>> | 82% | 37,260 psi | 66% | 2333 fps | 95.3% |
| Hodgdon H4350 | <<locked>> | 84% | 43,221 psi | 76% | 2405 fps | 95.6% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 30,095 psi | 53% | 2159 fps | 97.6% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 46,166 psi | 82% | 2474 fps | 100% |
| Hodgdon Superformance | 46.5 gr | 84% | 38,986 psi | 69% | 2395 fps | 95.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,035 psi | 48% | 1388 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 47,790 psi | 84% | 2444 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 43,990 psi | 78% | 2379 fps | 99.6% |
| IMR 4166 Enduron | <<locked>> | 80% | 46,427 psi | 82% | 2402 fps | 97.7% |
| IMR 4350 | <<locked>> | 86% | 40,248 psi | 71% | 2339 fps | 95.6% |
| IMR 4451 Enduron | <<locked>> | 80% | 38,783 psi | 69% | 2287 fps | 95.6% |
| IMR 4831 | <<locked>> | 80% | 31,778 psi | 56% | 2205 fps | 96.5% |
| IMR 4895 | <<locked>> | 80% | 46,093 psi | 81% | 2457 fps | 99.9% |
| Lovex S062 | <<locked>> | 80% | 44,135 psi | 78% | 2379 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 36,318 psi | 64% | 2244 fps | 96.4% |
| Lovex S070 | <<locked>> | 82% | 36,927 psi | 65% | 2277 fps | 95.4% |
| Lovex S071 | <<locked>> | 96% | 34,156 psi | 60% | 2264 fps | 95.4% |
| Norma 203B | <<locked>> | 80% | 44,324 psi | 78% | 2418 fps | 99.8% |
| Norma 204 | <<locked>> | 90% | 45,411 psi | 80% | 2470 fps | 95.6% |
| Norma MRP | <<locked>> | 92% | 37,652 psi | 67% | 2415 fps | 95.1% |
| Norma URP | <<locked>> | 80% | 32,909 psi | 58% | 2241 fps | 96.7% |
| Ramshot Big Game | <<locked>> | 80% | 44,092 psi | 78% | 2438 fps | 99.8% |
| Ramshot Hunter | <<locked>> | 82% | 33,997 psi | 60% | 2274 fps | 95.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,311 psi | 48% | 1421 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 42,699 psi | 75% | 2369 fps | 97.5% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 38,870 psi | 69% | 2418 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 32,271 psi | 57% | 2254 fps | 96.2% |
| ReloadSwiss RS 70 | 42.5 gr | 80% | 32,010 psi | 57% | 2254 fps | 95.2% |
| Rottweil R 902 | <<locked>> | 80% | 46,137 psi | 82% | 2392 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 39,581 psi | 70% | 2333 fps | 99.7% |
| Rottweil R 905 | <<locked>> | 94% | 42,583 psi | 75% | 2448 fps | 95.3% |
| Rottweil R 907 | <<locked>> | 82% | 40,001 psi | 71% | 2310 fps | 95.5% |
| Shooters World Long Rifle | <<locked>> | 80% | 36,318 psi | 64% | 2244 fps | 96.4% |
| Shooters World Precision | <<locked>> | 80% | 44,135 psi | 78% | 2379 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 36,927 psi | 65% | 2277 fps | 95.4% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 40,422 psi | 71% | 2379 fps | 99.4% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 47,747 psi | 84% | 2454 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 41,365 psi | 73% | 2260 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 37,942 psi | 67% | 2244 fps | 95.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 42,192 psi | 75% | 2441 fps | 95.2% |
| Somchem S355 | <<locked>> | 80% | 40,001 psi | 71% | 2329 fps | 99.6% |
| Somchem S365 | <<locked>> | 80% | 29,515 psi | 52% | 2201 fps | 98.7% |
| Somchem S385 | <<locked>> | 92% | 40,654 psi | 72% | 2385 fps | 95.7% |
| Vihtavuori N135 | <<locked>> | 80% | 45,818 psi | 81% | 2359 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 46,325 psi | 82% | 2375 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 38,276 psi | 68% | 2274 fps | 99.9% |
| Vihtavuori N160 | <<locked>> | 80% | 34,200 psi | 60% | 2241 fps | 97% |
| Vihtavuori N165 | <<locked>> | 98% | 42,583 psi | 75% | 2408 fps | 95.7% |
| Vihtavuori N540 | <<locked>> | 80% | 44,614 psi | 79% | 2372 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 33,736 psi | 60% | 2244 fps | 96.7% |
| Vihtavuori N555 | <<locked>> | 82% | 27,195 psi | 48% | 2146 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 33,750 psi | 60% | 2221 fps | 98.8% |
| Winchester 760 | <<locked>> | 82% | 37,260 psi | 66% | 2333 fps | 95.3% |
| Winchester StaBALL HD | <<locked>> | 86% | 25,193 psi | 45% | 2146 fps | 95.2% |
| Winchester StaBALL Match | <<locked>> | 80% | 47,572 psi | 84% | 2461 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 43,120 psi | 76% | 2421 fps | 95.1% |
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 77 powders for 7 x 57 loaded with the .285 | 173gr | Prvi Partizan SP. Alliant Reloder-26 delivers the highest muzzle velocity at 2,677 fps; across all powders the maximum-charge window runs from 1,555 fps to 2,677 fps. Accurate 3100 gives the best case fill at 100 %, and 77 of the 77 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (390 MPa), the top charges use 64–90 %, leaving at least 10 % headroom. The 173.0 gr projectile in 0.285" calls for a 1:12.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, Alliant Reloder-22, Alliant Reloder-23 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, Alliant Reloder-26, Hodgdon Superformance rank at the top here: for 7 x 57 with the .285 | 173gr | Prvi Partizan SP 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.