Load Specifications
Load data in caliber 7 x 57 with .284 | 174gr | Prvi Partizan FMJ BT bullet and 78 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% | 49,197 psi | 87% | 2402 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 50,647 psi | 90% | 2448 fps | 97.7% |
| Accurate 3100ᴾ | <<locked>> | 100% | 46,180 psi | 82% | 2474 fps | 98.5% |
| Accurate 4064 | <<locked>> | 84% | 49,342 psi | 87% | 2444 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 48,921 psi | 86% | 2530 fps | 99.8% |
| ADI AR 2208 | <<locked>> | 86% | 50,270 psi | 89% | 2474 fps | 99.9% |
| ADI AR 2209 | <<locked>> | 98% | 50,444 psi | 89% | 2559 fps | 96.9% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 48,414 psi | 86% | 2572 fps | 99.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 50,328 psi | 89% | 2493 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 50,662 psi | 90% | 2510 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 49,966 psi | 88% | 2579 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 90% | 50,633 psi | 90% | 2602 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 49,371 psi | 87% | 2549 fps | 96.8% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 46,108 psi | 82% | 2539 fps | 96.2% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 43,526 psi | 77% | 2493 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 38,261 psi | 68% | 2411 fps | 97.3% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 49,153 psi | 87% | 2661 fps | 99.9% |
| Bofors RP3 | <<locked>> | 86% | 50,850 psi | 90% | 2507 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 46,108 psi | 82% | 2539 fps | 96.2% |
| Bofors RP7 | <<locked>> | 90% | 50,879 psi | 90% | 2487 fps | 98% |
| Hodgdon H380 | <<locked>> | 84% | 48,124 psi | 85% | 2470 fps | 99.5% |
| Hodgdon H414 | <<locked>> | 92% | 51,155 psi | 90% | 2569 fps | 98.6% |
| Hodgdon H4350 | <<locked>> | 88% | 48,762 psi | 86% | 2490 fps | 97% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 49,980 psi | 88% | 2513 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 48,907 psi | 86% | 2503 fps | 100% |
| Hodgdon Superformance | <<locked>> | 92% | 51,169 psi | 90% | 2605 fps | 98.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,969 psi | 64% | 1542 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 50,560 psi | 89% | 2477 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 49,632 psi | 88% | 2454 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 49,095 psi | 87% | 2434 fps | 98.1% |
| IMR 4350 | <<locked>> | 94% | 51,155 psi | 90% | 2513 fps | 98.1% |
| IMR 4451 Enduron | <<locked>> | 88% | 49,472 psi | 87% | 2467 fps | 98.1% |
| IMR 4831 | <<locked>> | 94% | 49,342 psi | 87% | 2520 fps | 99.8% |
| IMR 4895 | <<locked>> | 82% | 48,718 psi | 86% | 2487 fps | 100% |
| Lovex S062 | <<locked>> | 84% | 49,719 psi | 88% | 2454 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 49,052 psi | 87% | 2464 fps | 99.1% |
| Lovex S070 | <<locked>> | 92% | 49,951 psi | 88% | 2497 fps | 98.5% |
| Lovex S071ᴾ | <<locked>> | 100% | 38,319 psi | 68% | 2339 fps | 96.8% |
| Norma 203B | <<locked>> | 84% | 49,951 psi | 88% | 2497 fps | 100% |
| Norma 204 | <<locked>> | 92% | 47,906 psi | 85% | 2503 fps | 96.2% |
| Norma MRPᴾ | <<locked>> | 100% | 48,617 psi | 86% | 2615 fps | 98.2% |
| Norma URP | <<locked>> | 94% | 51,155 psi | 90% | 2562 fps | 99.9% |
| Ramshot Big Game | <<locked>> | 84% | 50,096 psi | 89% | 2520 fps | 100% |
| Ramshot Hunter | <<locked>> | 94% | 50,154 psi | 89% | 2566 fps | 99.1% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,506 psi | 65% | 1581 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 48,356 psi | 85% | 2454 fps | 98.5% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 50,865 psi | 90% | 2562 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 50,444 psi | 89% | 2598 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 48,312 psi | 85% | 2546 fps | 99.6% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 50,995 psi | 90% | 2621 fps | 99.8% |
| Rottweil R 902 | <<locked>> | 82% | 48,747 psi | 86% | 2421 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 50,763 psi | 90% | 2500 fps | 100% |
| Rottweil R 905 | <<locked>> | 98% | 48,457 psi | 86% | 2536 fps | 96.8% |
| Rottweil R 907 | <<locked>> | 90% | 50,879 psi | 90% | 2487 fps | 98% |
| Shooters World Long Rifle | <<locked>> | 90% | 49,052 psi | 87% | 2464 fps | 99.1% |
| Shooters World Precision | <<locked>> | 84% | 49,719 psi | 88% | 2454 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 49,951 psi | 88% | 2497 fps | 98.5% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 48,979 psi | 87% | 2510 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 50,473 psi | 89% | 2484 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 49,574 psi | 88% | 2365 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 48,805 psi | 86% | 2418 fps | 98.1% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 51,010 psi | 90% | 2575 fps | 97.3% |
| Somchem S355 | <<locked>> | 88% | 50,952 psi | 90% | 2497 fps | 100% |
| Somchem S365 | <<locked>> | 96% | 49,748 psi | 88% | 2566 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 48,863 psi | 86% | 2513 fps | 97.7% |
| Vihtavuori N135 | <<locked>> | 82% | 48,501 psi | 86% | 2388 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 48,994 psi | 87% | 2402 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 48,950 psi | 87% | 2434 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 50,357 psi | 89% | 2516 fps | 99.8% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 45,063 psi | 80% | 2441 fps | 96.4% |
| Vihtavuori N540 | <<locked>> | 84% | 50,227 psi | 89% | 2441 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 49,211 psi | 87% | 2516 fps | 99.7% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 48,399 psi | 86% | 2562 fps | 99.9% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 49,763 psi | 88% | 2490 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 48,283 psi | 85% | 2526 fps | 98.2% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 39,102 psi | 69% | 2530 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 50,328 psi | 89% | 2490 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 48,907 psi | 86% | 2503 fps | 96.5% |
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% | 46,050 psi | 81% | 2356 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 44,657 psi | 79% | 2352 fps | 96.5% |
| Accurate 3100 | <<locked>> | 92% | 35,317 psi | 62% | 2280 fps | 95.8% |
| Accurate 4064 | <<locked>> | 80% | 43,569 psi | 77% | 2362 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 32,285 psi | 57% | 2221 fps | 96.6% |
| ADI AR 2208 | <<locked>> | 80% | 41,742 psi | 74% | 2336 fps | 99.3% |
| ADI AR 2209 | <<locked>> | 94% | 44,309 psi | 78% | 2457 fps | 95.3% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 45,005 psi | 80% | 2513 fps | 99.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 41,727 psi | 74% | 2356 fps | 99.9% |
| Alliant Reloder-15 | <<locked>> | 80% | 44,570 psi | 79% | 2411 fps | 99.7% |
| Alliant Reloder-16 | <<locked>> | 80% | 32,387 psi | 57% | 2234 fps | 96.8% |
| Alliant Reloder-17 | <<locked>> | 80% | 36,245 psi | 64% | 2349 fps | 99.3% |
| Alliant Reloder-19 | <<locked>> | 94% | 43,439 psi | 77% | 2444 fps | 95.3% |
| Alliant Reloder-22 | <<locked>> | 98% | 43,236 psi | 76% | 2487 fps | 95.4% |
| Alliant Reloder-23 | <<locked>> | 84% | 26,629 psi | 47% | 2113 fps | 95.8% |
| Alliant Reloder-25 | <<locked>> | 96% | 33,953 psi | 60% | 2313 fps | 95.6% |
| Alliant Reloder-26 | 46.6 gr | 88% | 32,213 psi | 57% | 2316 fps | 95.9% |
| Bofors RP3 | <<locked>> | 80% | 41,742 psi | 74% | 2365 fps | 99.9% |
| Bofors RP5 | <<locked>> | 98% | 43,236 psi | 76% | 2487 fps | 95.4% |
| Bofors RP7 | <<locked>> | 82% | 39,697 psi | 70% | 2293 fps | 95.3% |
| Hodgdon H380 | <<locked>> | 80% | 42,279 psi | 75% | 2372 fps | 98.7% |
| Hodgdon H414 | <<locked>> | 82% | 36,956 psi | 65% | 2320 fps | 95.2% |
| Hodgdon H4350 | <<locked>> | 84% | 42,917 psi | 76% | 2388 fps | 95.5% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 29,994 psi | 53% | 2149 fps | 97.6% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 45,788 psi | 81% | 2457 fps | 100% |
| Hodgdon Superformance | 45.9 gr | 84% | 38,580 psi | 68% | 2375 fps | 95.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,890 psi | 48% | 1378 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 47,427 psi | 84% | 2428 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 43,888 psi | 78% | 2365 fps | 99.6% |
| IMR 4166 Enduron | <<locked>> | 80% | 46,079 psi | 81% | 2385 fps | 97.6% |
| IMR 4350 | <<locked>> | 86% | 39,987 psi | 71% | 2326 fps | 95.5% |
| IMR 4451 Enduron | <<locked>> | 80% | 38,711 psi | 68% | 2277 fps | 95.5% |
| IMR 4831 | <<locked>> | 80% | 31,473 psi | 56% | 2188 fps | 96.4% |
| IMR 4895 | <<locked>> | 80% | 45,672 psi | 81% | 2438 fps | 99.9% |
| Lovex S062 | <<locked>> | 80% | 44,034 psi | 78% | 2365 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 36,201 psi | 64% | 2231 fps | 96.4% |
| Lovex S070 | <<locked>> | 82% | 36,637 psi | 65% | 2260 fps | 95.3% |
| Lovex S071 | <<locked>> | 96% | 33,910 psi | 60% | 2251 fps | 95.3% |
| Norma 203B | <<locked>> | 80% | 43,918 psi | 78% | 2402 fps | 99.8% |
| Norma 204 | <<locked>> | 90% | 44,875 psi | 79% | 2451 fps | 95.5% |
| Norma MRP | <<locked>> | 94% | 39,987 psi | 71% | 2457 fps | 96% |
| Norma URP | <<locked>> | 80% | 32,590 psi | 58% | 2224 fps | 96.6% |
| Ramshot Big Game | <<locked>> | 80% | 43,787 psi | 77% | 2421 fps | 99.7% |
| Ramshot Hunter | <<locked>> | 82% | 33,736 psi | 60% | 2257 fps | 95% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,180 psi | 48% | 1407 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 42,380 psi | 75% | 2352 fps | 97.4% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 47,543 psi | 84% | 2513 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 38,566 psi | 68% | 2402 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 31,981 psi | 57% | 2238 fps | 96.1% |
| ReloadSwiss RS 70 | 42 gr | 80% | 31,778 psi | 56% | 2238 fps | 95.1% |
| Rottweil R 902 | <<locked>> | 80% | 45,730 psi | 81% | 2375 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 39,218 psi | 69% | 2316 fps | 99.7% |
| Rottweil R 905 | <<locked>> | 94% | 42,366 psi | 75% | 2431 fps | 95.2% |
| Rottweil R 907 | <<locked>> | 82% | 39,697 psi | 70% | 2293 fps | 95.3% |
| Shooters World Long Rifle | <<locked>> | 80% | 36,201 psi | 64% | 2231 fps | 96.4% |
| Shooters World Precision | <<locked>> | 80% | 44,034 psi | 78% | 2365 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 36,637 psi | 65% | 2260 fps | 95.3% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 40,089 psi | 71% | 2359 fps | 99.4% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 47,413 psi | 84% | 2438 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 41,220 psi | 73% | 2247 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 37,666 psi | 67% | 2228 fps | 95.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 41,974 psi | 74% | 2428 fps | 95.1% |
| Somchem S355 | <<locked>> | 80% | 39,900 psi | 71% | 2320 fps | 99.6% |
| Somchem S365 | <<locked>> | 80% | 29,240 psi | 52% | 2185 fps | 98.6% |
| Somchem S385 | <<locked>> | 92% | 40,495 psi | 72% | 2372 fps | 95.6% |
| Vihtavuori N135 | <<locked>> | 80% | 45,672 psi | 81% | 2349 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 45,963 psi | 81% | 2359 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 37,913 psi | 67% | 2257 fps | 99.9% |
| Vihtavuori N160 | <<locked>> | 80% | 33,852 psi | 60% | 2224 fps | 96.9% |
| Vihtavuori N165 | <<locked>> | 98% | 42,206 psi | 75% | 2392 fps | 95.6% |
| Vihtavuori N540 | <<locked>> | 80% | 44,309 psi | 78% | 2356 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 33,460 psi | 59% | 2228 fps | 96.6% |
| Vihtavuori N555 | <<locked>> | 84% | 28,761 psi | 51% | 2178 fps | 95.9% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 33,344 psi | 59% | 2201 fps | 98.7% |
| Winchester 760 | <<locked>> | 82% | 36,956 psi | 65% | 2320 fps | 95.2% |
| Winchester StaBALL HD | <<locked>> | 86% | 25,019 psi | 44% | 2129 fps | 95.1% |
| Winchester StaBALL Match | <<locked>> | 80% | 47,239 psi | 84% | 2448 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 45,672 psi | 81% | 2454 fps | 95.8% |
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 78 powders for 7 x 57 loaded with the .284 | 174gr | Prvi Partizan FMJ BT. Alliant Reloder-26 delivers the highest muzzle velocity at 2,661 fps; across all powders the maximum-charge window runs from 1,542 fps to 2,661 fps. Accurate 3100 gives the best case fill at 100 %, and 78 of the 78 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 174.0 gr projectile in 0.284" calls for a 1:12.0 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 .284 | 174gr | Prvi Partizan FMJ BT 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.