Load Specifications
Load data in caliber 7 x 57 R with .284 | 140gr | Prvi Partizan PSP BT bullet and 52 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 60, Alliant Reloder-17 and ReloadSwiss RS 62.
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>> | 84% | 43,758 psi | 89% | 2605 fps | 100% |
| Accurate 4064 | <<locked>> | 86% | 44,034 psi | 89% | 2648 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 42,583 psi | 86% | 2687 fps | 97.2% |
| ADI AR 2208 | <<locked>> | 86% | 43,265 psi | 88% | 2615 fps | 97.8% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 43,787 psi | 89% | 2749 fps | 97.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 42,873 psi | 87% | 2641 fps | 99% |
| Alliant Reloder-15 | <<locked>> | 84% | 43,337 psi | 88% | 2651 fps | 98% |
| Alliant Reloder-16 | <<locked>> | 94% | 42,380 psi | 86% | 2697 fps | 97.3% |
| Alliant Reloder-17 | <<locked>> | 90% | 42,351 psi | 86% | 2726 fps | 98.7% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 36,201 psi | 73% | 2585 fps | 96.9% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 44,208 psi | 90% | 2667 fps | 97.6% |
| Bofors RP3 | <<locked>> | 86% | 42,482 psi | 86% | 2644 fps | 99% |
| Hodgdon H380 | <<locked>> | 86% | 43,656 psi | 89% | 2651 fps | 96.8% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 44,121 psi | 89% | 2687 fps | 98.9% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 43,932 psi | 89% | 2697 fps | 99.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,317 psi | 72% | 1713 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 43,497 psi | 88% | 2625 fps | 98.8% |
| IMR 4064 | <<locked>> | 84% | 42,627 psi | 86% | 2595 fps | 97.9% |
| IMR 4831 | <<locked>> | 96% | 43,671 psi | 89% | 2690 fps | 97.5% |
| IMR 4895 | <<locked>> | 84% | 44,353 psi | 90% | 2684 fps | 98.7% |
| Lovex D073.6 | <<locked>> | 82% | 43,918 psi | 89% | 2644 fps | 99.9% |
| Lovex S062 | <<locked>> | 84% | 42,482 psi | 86% | 2602 fps | 99.2% |
| Lovex S065 | <<locked>> | 92% | 44,469 psi | 90% | 2638 fps | 96.1% |
| Norma 201 | <<locked>> | 82% | 44,092 psi | 89% | 2618 fps | 99.4% |
| Norma 202 | <<locked>> | 82% | 44,295 psi | 90% | 2628 fps | 100% |
| Norma 203B | <<locked>> | 84% | 42,656 psi | 87% | 2641 fps | 98.3% |
| Norma URP | <<locked>> | 94% | 42,598 psi | 86% | 2684 fps | 97% |
| Ramshot Big Game | <<locked>> | 84% | 42,192 psi | 86% | 2654 fps | 98% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,665 psi | 72% | 1752 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 42,424 psi | 86% | 2697 fps | 97.8% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 42,351 psi | 86% | 2736 fps | 99.9% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 42,424 psi | 86% | 2707 fps | 96.8% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 42,873 psi | 87% | 2720 fps | 96% |
| Rottweil R 902 | <<locked>> | 82% | 41,901 psi | 85% | 2569 fps | 99% |
| Rottweil R 903 | <<locked>> | 88% | 42,685 psi | 87% | 2638 fps | 98.8% |
| Shooters World Long Rifle | <<locked>> | 92% | 44,469 psi | 90% | 2638 fps | 96.1% |
| Shooters World Match Rifle | <<locked>> | 82% | 43,918 psi | 89% | 2644 fps | 99.9% |
| Shooters World Precision | <<locked>> | 84% | 42,482 psi | 86% | 2602 fps | 99.2% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 43,976 psi | 89% | 2694 fps | 98.5% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 43,453 psi | 88% | 2631 fps | 98.4% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 42,699 psi | 87% | 2533 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 43,395 psi | 88% | 2641 fps | 98.8% |
| Somchem S365 | <<locked>> | 98% | 43,526 psi | 88% | 2746 fps | 99.7% |
| Vihtavuori N135 | <<locked>> | 84% | 43,932 psi | 89% | 2602 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 41,858 psi | 85% | 2562 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 44,411 psi | 90% | 2631 fps | 99.7% |
| Vihtavuori N160 | <<locked>> | 92% | 41,843 psi | 85% | 2631 fps | 96.7% |
| Vihtavuori N540 | <<locked>> | 84% | 43,149 psi | 88% | 2602 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 43,888 psi | 89% | 2687 fps | 97.1% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 38,914 psi | 79% | 2661 fps | 96.9% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 42,250 psi | 86% | 2615 fps | 98.7% |
| Winchester StaBALL Match | <<locked>> | 82% | 42,917 psi | 87% | 2638 fps | 98.8% |
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% | 38,479 psi | 78% | 2513 fps | 100% |
| Accurate 4064 | <<locked>> | 80% | 36,405 psi | 74% | 2500 fps | 99.7% |
| Accurate 4350 | <<locked>> | 90% | 37,028 psi | 75% | 2572 fps | 95.5% |
| ADI AR 2208 | <<locked>> | 80% | 35,926 psi | 73% | 2461 fps | 95.7% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 38,276 psi | 78% | 2628 fps | 96.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 35,288 psi | 72% | 2480 fps | 97.3% |
| Alliant Reloder-15 | <<locked>> | 80% | 38,072 psi | 77% | 2543 fps | 96.6% |
| Alliant Reloder-16 | <<locked>> | 90% | 37,565 psi | 76% | 2589 fps | 95.7% |
| Alliant Reloder-17 | 42.8 gr | 82% | 32,634 psi | 66% | 2493 fps | 95.6% |
| Alliant Reloder-23 | <<locked>> | 96% | 32,155 psi | 65% | 2480 fps | 95.1% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 41,249 psi | 84% | 2608 fps | 96.9% |
| Bofors RP3 | <<locked>> | 80% | 34,780 psi | 71% | 2480 fps | 97.3% |
| Hodgdon H380 | <<locked>> | 82% | 38,072 psi | 77% | 2533 fps | 95.2% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 32,213 psi | 65% | 2431 fps | 95.6% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 38,305 psi | 78% | 2585 fps | 98.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,165 psi | 53% | 1529 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 40,785 psi | 83% | 2572 fps | 98.3% |
| IMR 4064 | <<locked>> | 80% | 37,695 psi | 76% | 2493 fps | 96.6% |
| IMR 4831 | <<locked>> | 90% | 35,795 psi | 73% | 2526 fps | 95.1% |
| IMR 4895 | <<locked>> | 80% | 38,986 psi | 79% | 2572 fps | 97.5% |
| Lovex D073.6 | <<locked>> | 80% | 41,104 psi | 83% | 2595 fps | 99.8% |
| Lovex S062 | <<locked>> | 80% | 37,550 psi | 76% | 2500 fps | 98.3% |
| Lovex S065 | <<locked>> | 90% | 42,018 psi | 85% | 2592 fps | 95.4% |
| Norma 201 | <<locked>> | 80% | 41,350 psi | 84% | 2566 fps | 99% |
| Norma 202 | <<locked>> | 80% | 41,524 psi | 84% | 2575 fps | 100% |
| Norma 203B | <<locked>> | 80% | 37,463 psi | 76% | 2533 fps | 97% |
| Norma URP | <<locked>> | 90% | 37,623 psi | 76% | 2579 fps | 95.5% |
| Ramshot Big Game | <<locked>> | 80% | 36,869 psi | 75% | 2539 fps | 96.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,556 psi | 54% | 1568 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 39,610 psi | 80% | 2641 fps | 97% |
| ReloadSwiss RS 60 | 41.7 gr | 80% | 32,430 psi | 66% | 2500 fps | 98.1% |
| ReloadSwiss RS 62 | 46.9 gr | 90% | 36,999 psi | 75% | 2592 fps | 95% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 40,016 psi | 81% | 2657 fps | 95% |
| Rottweil R 902 | <<locked>> | 80% | 39,291 psi | 80% | 2516 fps | 98.6% |
| Rottweil R 903 | <<locked>> | 80% | 32,648 psi | 66% | 2425 fps | 96.2% |
| Shooters World Long Rifle | <<locked>> | 90% | 42,018 psi | 85% | 2592 fps | 95.4% |
| Shooters World Match Rifle | <<locked>> | 80% | 41,104 psi | 83% | 2595 fps | 99.8% |
| Shooters World Precision | <<locked>> | 80% | 37,550 psi | 76% | 2500 fps | 98.3% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 33,837 psi | 69% | 2474 fps | 95.6% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 40,785 psi | 83% | 2579 fps | 97.8% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 35,476 psi | 72% | 2395 fps | 99.8% |
| Somchem S355 | <<locked>> | 80% | 33,692 psi | 68% | 2434 fps | 96.3% |
| Somchem S365 | <<locked>> | 86% | 29,457 psi | 60% | 2415 fps | 95.9% |
| Vihtavuori N135 | <<locked>> | 80% | 38,595 psi | 78% | 2507 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 39,233 psi | 80% | 2513 fps | 99.9% |
| Vihtavuori N150 | <<locked>> | 80% | 31,923 psi | 65% | 2372 fps | 97.2% |
| Vihtavuori N160 | <<locked>> | 88% | 36,767 psi | 75% | 2523 fps | 95.1% |
| Vihtavuori N540 | <<locked>> | 80% | 37,768 psi | 77% | 2500 fps | 99.6% |
| Vihtavuori N550 | <<locked>> | 90% | 38,580 psi | 78% | 2579 fps | 95.6% |
| Vihtavuori N555 | <<locked>> | 96% | 34,316 psi | 70% | 2556 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 32,460 psi | 66% | 2398 fps | 95.7% |
| Winchester StaBALL Match | <<locked>> | 80% | 39,958 psi | 81% | 2579 fps | 98.2% |
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 52 powders for 7 x 57 R loaded with the .284 | 140gr | Prvi Partizan PSP BT. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,749 fps; across all powders the maximum-charge window runs from 1,713 fps to 2,749 fps. Alliant Reloder-23 gives the best case fill at 100 %, and 52 of the 52 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (340 MPa), the top charges use 72–90 %, leaving at least 10 % headroom. The 140.0 gr projectile in 0.284" calls for a 1:12.0 twist; slower twists will usually not stabilise this weight. Alliant Reloder-23, Hodgdon TrailBoss, ReloadSwiss RS 14 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 60, Alliant Reloder-17, ReloadSwiss RS 62 rank at the top here: for 7 x 57 R with the .284 | 140gr | Prvi Partizan PSP 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.