Load Specifications
Load data in caliber 7 x 57 with .284 | 145gr | Prvi Partizan SP bullet and 81 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 70, ReloadSwiss RS 60 and Alliant Reloder-17.
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 2495 | <<locked>> | 86% | 49,705 psi | 88% | 2661 fps | 100% |
| Accurate 4064 | <<locked>> | 88% | 49,850 psi | 88% | 2703 fps | 100% |
| Accurate 4350 | <<locked>> | 96% | 49,052 psi | 87% | 2772 fps | 98.9% |
| ADI AR 2206H | <<locked>> | 84% | 50,241 psi | 89% | 2726 fps | 99.6% |
| ADI AR 2208 | <<locked>> | 90% | 51,184 psi | 90% | 2726 fps | 99.4% |
| ADI Benchmark 8208 | <<locked>> | 82% | 49,429 psi | 87% | 2684 fps | 99.9% |
| Alliant AR-Comp | <<locked>> | 82% | 49,806 psi | 88% | 2664 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 49,414 psi | 87% | 2831 fps | 99.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 90% | 51,010 psi | 90% | 2749 fps | 99.9% |
| Alliant Reloder-15 | <<locked>> | 86% | 48,370 psi | 86% | 2713 fps | 99.2% |
| Alliant Reloder-16 | <<locked>> | 98% | 50,691 psi | 90% | 2828 fps | 99.4% |
| Alliant Reloder-17 | <<locked>> | 92% | 48,037 psi | 85% | 2808 fps | 99.8% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 38,479 psi | 68% | 2618 fps | 98.3% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 42,728 psi | 76% | 2766 fps | 97.4% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 49,806 psi | 88% | 2736 fps | 99% |
| Bofors RP3 | <<locked>> | 88% | 48,356 psi | 85% | 2713 fps | 99.9% |
| Hodgdon BL-C2 | <<locked>> | 82% | 48,283 psi | 85% | 2703 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 49,008 psi | 87% | 2720 fps | 98.4% |
| Hodgdon H414 | <<locked>> | 94% | 48,588 psi | 86% | 2762 fps | 96.4% |
| Hodgdon H4895 | <<locked>> | 84% | 50,705 psi | 90% | 2736 fps | 99.9% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 49,966 psi | 88% | 2759 fps | 99.8% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 49,850 psi | 88% | 2769 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,578 psi | 63% | 1703 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 48,805 psi | 86% | 2690 fps | 99.7% |
| IMR 3031 | <<locked>> | 84% | 50,705 psi | 90% | 2726 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 50,691 psi | 90% | 2710 fps | 99.5% |
| IMR 4166 Enduron | <<locked>> | 86% | 50,908 psi | 90% | 2690 fps | 96.8% |
| IMR 4451 Enduron | <<locked>> | 92% | 50,430 psi | 89% | 2710 fps | 96.6% |
| IMR 4831 | <<locked>> | 98% | 49,850 psi | 88% | 2766 fps | 99% |
| IMR 4895 | <<locked>> | 86% | 49,603 psi | 88% | 2746 fps | 99.6% |
| IMR 8208 XBR | <<locked>> | 82% | 49,429 psi | 87% | 2684 fps | 99.9% |
| Lovex D073.6 | <<locked>> | 84% | 49,632 psi | 88% | 2707 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 49,980 psi | 88% | 2657 fps | 99.6% |
| Lovex S062 | <<locked>> | 88% | 50,531 psi | 89% | 2710 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 49,937 psi | 88% | 2707 fps | 97.9% |
| Lovex S070 | <<locked>> | 96% | 50,517 psi | 89% | 2736 fps | 97% |
| Norma 201 | <<locked>> | 84% | 49,269 psi | 87% | 2680 fps | 99.9% |
| Norma 202 | <<locked>> | 84% | 49,574 psi | 88% | 2684 fps | 100% |
| Norma 203B | <<locked>> | 88% | 51,039 psi | 90% | 2759 fps | 99.7% |
| Norma URP | <<locked>> | 96% | 48,370 psi | 86% | 2759 fps | 98.7% |
| Ramshot Big Game | <<locked>> | 88% | 51,169 psi | 90% | 2782 fps | 99.7% |
| Ramshot Hunter | <<locked>> | 98% | 50,488 psi | 89% | 2805 fps | 97.7% |
| Ramshot TAC | <<locked>> | 82% | 49,487 psi | 87% | 2694 fps | 97.9% |
| Ramshot Wild Boar | <<locked>> | 82% | 49,081 psi | 87% | 2713 fps | 99.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,940 psi | 64% | 1742 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 49,647 psi | 88% | 2703 fps | 97.1% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 48,327 psi | 85% | 2776 fps | 99.2% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 47,790 psi | 84% | 2808 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 48,472 psi | 86% | 2789 fps | 98.6% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 48,573 psi | 86% | 2812 fps | 98.2% |
| Rottweil R 901 | <<locked>> | 82% | 50,401 psi | 89% | 2667 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 49,864 psi | 88% | 2680 fps | 100% |
| Rottweil R 903 | <<locked>> | 90% | 48,182 psi | 85% | 2707 fps | 99.8% |
| Shooters World Long Rifle | <<locked>> | 94% | 49,937 psi | 88% | 2707 fps | 97.9% |
| Shooters World Match Rifle | <<locked>> | 84% | 49,632 psi | 88% | 2707 fps | 100% |
| Shooters World Precision | <<locked>> | 88% | 50,531 psi | 89% | 2710 fps | 100% |
| Shooters World SW4350 | <<locked>> | 96% | 50,517 psi | 89% | 2736 fps | 97% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 49,705 psi | 88% | 2762 fps | 99.6% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 50,952 psi | 90% | 2720 fps | 98.6% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 48,646 psi | 86% | 2697 fps | 99.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 50,792 psi | 90% | 2628 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 50,894 psi | 90% | 2628 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 49,850 psi | 88% | 2657 fps | 96.5% |
| Somchem S335 | <<locked>> | 84% | 50,212 psi | 89% | 2625 fps | 100% |
| Somchem S341 | <<locked>> | 84% | 50,763 psi | 90% | 2717 fps | 99.6% |
| Somchem S355 | <<locked>> | 90% | 48,791 psi | 86% | 2707 fps | 99.7% |
| Somchem S365ᴾ | <<locked>> | 100% | 49,371 psi | 87% | 2815 fps | 100% |
| Vihtavuori N133 | <<locked>> | 84% | 51,053 psi | 90% | 2615 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 49,197 psi | 87% | 2648 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 50,198 psi | 89% | 2664 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 49,893 psi | 88% | 2690 fps | 100% |
| Vihtavuori N160 | <<locked>> | 96% | 50,879 psi | 90% | 2762 fps | 99% |
| Vihtavuori N530 | <<locked>> | 82% | 49,487 psi | 87% | 2677 fps | 100% |
| Vihtavuori N540 | <<locked>> | 86% | 48,327 psi | 85% | 2657 fps | 100% |
| Vihtavuori N550 | <<locked>> | 96% | 49,792 psi | 88% | 2762 fps | 98.7% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 41,930 psi | 74% | 2690 fps | 98.2% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 51,039 psi | 90% | 2743 fps | 99.9% |
| Winchester 748 | <<locked>> | 82% | 49,501 psi | 88% | 2726 fps | 100% |
| Winchester 760 | <<locked>> | 94% | 48,588 psi | 86% | 2762 fps | 96.4% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 34,447 psi | 61% | 2608 fps | 97.8% |
| Winchester StaBALL Match | <<locked>> | 84% | 48,515 psi | 86% | 2707 fps | 99.7% |
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 2495 | <<locked>> | 80% | 40,944 psi | 72% | 2520 fps | 100% |
| Accurate 4064 | <<locked>> | 80% | 38,696 psi | 68% | 2513 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 34,548 psi | 61% | 2487 fps | 95.3% |
| ADI AR 2206H | <<locked>> | 80% | 44,411 psi | 79% | 2625 fps | 99% |
| ADI AR 2208 | <<locked>> | 80% | 37,811 psi | 67% | 2477 fps | 96.9% |
| ADI Benchmark 8208 | <<locked>> | 80% | 46,499 psi | 82% | 2631 fps | 99.8% |
| Alliant AR-Comp | <<locked>> | 80% | 46,572 psi | 82% | 2618 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 40,161 psi | 71% | 2644 fps | 97.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 37,304 psi | 66% | 2497 fps | 98.3% |
| Alliant Reloder-15 | <<locked>> | 80% | 40,161 psi | 71% | 2559 fps | 97.7% |
| Alliant Reloder-16 | <<locked>> | 86% | 34,998 psi | 62% | 2503 fps | 95.4% |
| Alliant Reloder-17 | 43 gr | 80% | 32,242 psi | 57% | 2461 fps | 96.2% |
| Alliant Reloder-23 | <<locked>> | 94% | 32,039 psi | 57% | 2457 fps | 95.9% |
| Alliant Reloder-26 | <<locked>> | 96% | 37,188 psi | 66% | 2638 fps | 95.3% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 43,540 psi | 77% | 2625 fps | 98% |
| Bofors RP3 | <<locked>> | 80% | 36,912 psi | 65% | 2500 fps | 98.3% |
| Hodgdon BL-C2 | <<locked>> | 80% | 45,092 psi | 80% | 2651 fps | 99.9% |
| Hodgdon H380 | <<locked>> | 80% | 37,898 psi | 67% | 2503 fps | 95.8% |
| Hodgdon H414 | <<locked>> | 92% | 45,324 psi | 80% | 2707 fps | 95.6% |
| Hodgdon H4895 | <<locked>> | 80% | 44,846 psi | 79% | 2635 fps | 99.4% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 30,110 psi | 53% | 2349 fps | 95.3% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 40,712 psi | 72% | 2605 fps | 99.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,382 psi | 47% | 1519 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 42,830 psi | 76% | 2585 fps | 99% |
| IMR 3031 | <<locked>> | 80% | 44,440 psi | 79% | 2631 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 39,682 psi | 70% | 2510 fps | 97.7% |
| IMR 4166 Enduron | <<locked>> | 82% | 44,831 psi | 79% | 2582 fps | 95.3% |
| IMR 4451 Enduron | <<locked>> | 88% | 44,672 psi | 79% | 2608 fps | 95.1% |
| IMR 4831 | <<locked>> | 86% | 33,692 psi | 60% | 2451 fps | 95% |
| IMR 4895 | <<locked>> | 80% | 41,147 psi | 73% | 2592 fps | 98.5% |
| IMR 8208 XBR | <<locked>> | 80% | 46,499 psi | 82% | 2631 fps | 99.8% |
| Lovex D073.6 | <<locked>> | 80% | 43,424 psi | 77% | 2605 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 44,527 psi | 79% | 2566 fps | 99% |
| Lovex S062 | <<locked>> | 80% | 39,653 psi | 70% | 2516 fps | 99.1% |
| Lovex S065 | <<locked>> | 86% | 39,102 psi | 69% | 2507 fps | 95.2% |
| Lovex S070 | <<locked>> | 92% | 44,686 psi | 79% | 2635 fps | 95.6% |
| Norma 201 | <<locked>> | 80% | 43,526 psi | 77% | 2579 fps | 99.6% |
| Norma 202 | <<locked>> | 80% | 43,758 psi | 77% | 2585 fps | 100% |
| Norma 203B | <<locked>> | 80% | 39,552 psi | 70% | 2549 fps | 98.1% |
| Norma URP | <<locked>> | 86% | 35,099 psi | 62% | 2493 fps | 95.3% |
| Ramshot Big Game | <<locked>> | 80% | 38,856 psi | 69% | 2556 fps | 97.7% |
| Ramshot Hunter | <<locked>> | 92% | 41,466 psi | 73% | 2638 fps | 95.4% |
| Ramshot TAC | <<locked>> | 80% | 46,354 psi | 82% | 2638 fps | 97.3% |
| Ramshot Wild Boar | <<locked>> | 80% | 45,861 psi | 81% | 2657 fps | 99.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,789 psi | 47% | 1555 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 43,395 psi | 77% | 2592 fps | 95.6% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 42,047 psi | 74% | 2657 fps | 98.1% |
| ReloadSwiss RS 60 | 43 gr | 80% | 34,330 psi | 61% | 2530 fps | 99.2% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 36,782 psi | 65% | 2559 fps | 95.6% |
| ReloadSwiss RS 70 | 49.1 gr | 90% | 39,610 psi | 70% | 2628 fps | 95.7% |
| Rottweil R 901 | <<locked>> | 80% | 47,384 psi | 84% | 2618 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 41,379 psi | 73% | 2530 fps | 99.3% |
| Rottweil R 903 | <<locked>> | 80% | 34,722 psi | 61% | 2444 fps | 97.5% |
| Shooters World Long Rifle | <<locked>> | 86% | 39,102 psi | 69% | 2507 fps | 95.2% |
| Shooters World Match Rifle | <<locked>> | 80% | 43,424 psi | 77% | 2605 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 39,653 psi | 70% | 2516 fps | 99.1% |
| Shooters World SW4350 | <<locked>> | 92% | 44,686 psi | 79% | 2635 fps | 95.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 35,665 psi | 63% | 2490 fps | 96.9% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 44,440 psi | 79% | 2608 fps | 97.4% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 42,844 psi | 76% | 2592 fps | 98.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 44,701 psi | 79% | 2530 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 37,173 psi | 66% | 2402 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 43,816 psi | 77% | 2552 fps | 95% |
| Somchem S335 | <<locked>> | 80% | 44,483 psi | 79% | 2536 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 44,353 psi | 78% | 2612 fps | 98.9% |
| Somchem S355 | <<locked>> | 80% | 35,679 psi | 63% | 2454 fps | 97.5% |
| Somchem S365 | <<locked>> | 82% | 27,601 psi | 49% | 2336 fps | 95.7% |
| Vihtavuori N133 | <<locked>> | 80% | 45,005 psi | 80% | 2526 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 40,712 psi | 72% | 2513 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 41,365 psi | 73% | 2523 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 33,794 psi | 60% | 2388 fps | 98.2% |
| Vihtavuori N160 | <<locked>> | 86% | 36,492 psi | 65% | 2493 fps | 95.7% |
| Vihtavuori N530 | <<locked>> | 80% | 46,456 psi | 82% | 2628 fps | 99.8% |
| Vihtavuori N540 | <<locked>> | 80% | 39,972 psi | 71% | 2513 fps | 100% |
| Vihtavuori N550 | <<locked>> | 86% | 36,013 psi | 64% | 2497 fps | 95.3% |
| Vihtavuori N555 | <<locked>> | 92% | 32,343 psi | 57% | 2477 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 30,066 psi | 53% | 2313 fps | 95.4% |
| Winchester 748 | <<locked>> | 80% | 46,195 psi | 82% | 2674 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 45,629 psi | 81% | 2710 fps | 95.7% |
| Winchester StaBALL HD | <<locked>> | 96% | 30,356 psi | 54% | 2480 fps | 95.5% |
| Winchester StaBALL Match | <<locked>> | 80% | 42,293 psi | 75% | 2595 fps | 99% |
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 81 powders for 7 x 57 loaded with the .284 | 145gr | Prvi Partizan SP. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,831 fps; across all powders the maximum-charge window runs from 1,703 fps to 2,831 fps. Alliant Reloder-23 gives the best case fill at 100 %, and 81 of the 81 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 145.0 gr projectile in 0.284" calls for a 1:13.0 twist; slower twists will usually not stabilise this weight. Alliant Reloder-23, Alliant Reloder-26, Hodgdon Hybrid 100V 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, ReloadSwiss RS 60, Alliant Reloder-17 rank at the top here: for 7 x 57 with the .284 | 145gr | 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.