Load Specifications
Load data in caliber 7 x 57 with .284 | 140gr | Impala RNFP KO 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 60, ReloadSwiss RS 70 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% | 51,097 psi | 90% | 2690 fps | 100% |
| Accurate 4064 | <<locked>> | 88% | 50,995 psi | 90% | 2733 fps | 100% |
| Accurate 4350 | <<locked>> | 96% | 49,211 psi | 87% | 2785 fps | 98.4% |
| ADI AR 2206H | <<locked>> | 84% | 50,560 psi | 89% | 2743 fps | 99.3% |
| ADI AR 2208 | <<locked>> | 90% | 51,111 psi | 90% | 2736 fps | 99% |
| ADI Benchmark 8208 | <<locked>> | 82% | 49,574 psi | 88% | 2697 fps | 99.8% |
| Alliant AR-Comp | <<locked>> | 82% | 50,009 psi | 88% | 2687 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 49,110 psi | 87% | 2835 fps | 98.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 48,167 psi | 85% | 2717 fps | 99.6% |
| Alliant Reloder-15 | <<locked>> | 86% | 48,892 psi | 86% | 2736 fps | 98.8% |
| Alliant Reloder-16 | <<locked>> | 98% | 50,227 psi | 89% | 2831 fps | 98.8% |
| Alliant Reloder-17 | <<locked>> | 94% | 51,184 psi | 90% | 2874 fps | 99.8% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 38,972 psi | 69% | 2631 fps | 97.7% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 42,888 psi | 76% | 2772 fps | 96.4% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 49,588 psi | 88% | 2746 fps | 98.5% |
| Bofors RP3 | <<locked>> | 88% | 48,718 psi | 86% | 2733 fps | 99.7% |
| Hodgdon BL-C2 | <<locked>> | 82% | 48,602 psi | 86% | 2723 fps | 99.9% |
| Hodgdon H380 | <<locked>> | 88% | 49,530 psi | 88% | 2733 fps | 97.9% |
| Hodgdon H4895 | <<locked>> | 84% | 51,068 psi | 90% | 2756 fps | 99.7% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 49,588 psi | 88% | 2766 fps | 99.5% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 49,472 psi | 87% | 2779 fps | 99.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,781 psi | 63% | 1709 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 48,602 psi | 86% | 2700 fps | 99.4% |
| IMR 3031 | <<locked>> | 84% | 50,676 psi | 90% | 2746 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 50,937 psi | 90% | 2723 fps | 99.1% |
| IMR 4166 Enduron | <<locked>> | 86% | 50,923 psi | 90% | 2697 fps | 96% |
| IMR 4451 Enduron | <<locked>> | 92% | 50,517 psi | 89% | 2720 fps | 95.8% |
| IMR 4831 | <<locked>> | 98% | 49,385 psi | 87% | 2772 fps | 98.5% |
| IMR 4895 | <<locked>> | 86% | 50,009 psi | 88% | 2766 fps | 99.3% |
| IMR 8208 XBR | <<locked>> | 82% | 49,574 psi | 88% | 2697 fps | 99.8% |
| Lovex D073.6 | <<locked>> | 84% | 50,096 psi | 89% | 2726 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 50,096 psi | 89% | 2671 fps | 99.3% |
| Lovex S062 | <<locked>> | 88% | 51,169 psi | 90% | 2730 fps | 99.9% |
| Lovex S065 | <<locked>> | 94% | 50,241 psi | 89% | 2720 fps | 97.3% |
| Lovex S070 | <<locked>> | 96% | 50,850 psi | 90% | 2749 fps | 96.3% |
| Norma 201 | <<locked>> | 84% | 50,038 psi | 88% | 2700 fps | 99.8% |
| Norma 202 | <<locked>> | 84% | 49,879 psi | 88% | 2700 fps | 100% |
| Norma 203B | <<locked>> | 88% | 50,894 psi | 90% | 2769 fps | 99.4% |
| Norma URP | <<locked>> | 98% | 51,155 psi | 90% | 2818 fps | 98.6% |
| Ramshot Big Game | <<locked>> | 88% | 50,923 psi | 90% | 2792 fps | 99.3% |
| Ramshot Hunter | <<locked>> | 98% | 50,053 psi | 88% | 2808 fps | 96.8% |
| Ramshot TAC | <<locked>> | 82% | 49,414 psi | 87% | 2700 fps | 97.3% |
| Ramshot Wild Boar | <<locked>> | 82% | 48,820 psi | 86% | 2720 fps | 99.1% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,260 psi | 64% | 1752 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 49,676 psi | 88% | 2710 fps | 96.4% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 48,138 psi | 85% | 2785 fps | 98.7% |
| ReloadSwiss RS 60 | <<locked>> | 92% | 50,792 psi | 90% | 2874 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 48,109 psi | 85% | 2795 fps | 97.9% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 48,399 psi | 86% | 2812 fps | 97.4% |
| Rottweil R 902 | <<locked>> | 86% | 50,328 psi | 89% | 2697 fps | 99.8% |
| Rottweil R 903 | <<locked>> | 90% | 48,588 psi | 86% | 2723 fps | 99.5% |
| Shooters World Long Rifle | <<locked>> | 94% | 50,241 psi | 89% | 2720 fps | 97.3% |
| Shooters World Match Rifle | <<locked>> | 84% | 50,096 psi | 89% | 2726 fps | 100% |
| Shooters World Precision | <<locked>> | 88% | 51,169 psi | 90% | 2730 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 96% | 50,850 psi | 90% | 2749 fps | 96.3% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 49,516 psi | 88% | 2772 fps | 99.2% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 48,109 psi | 85% | 2680 fps | 97.5% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 48,762 psi | 86% | 2710 fps | 99.1% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 50,908 psi | 90% | 2641 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 50,691 psi | 90% | 2641 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 50,111 psi | 89% | 2667 fps | 95.8% |
| Somchem S335 | <<locked>> | 84% | 50,749 psi | 90% | 2644 fps | 100% |
| Somchem S341 | <<locked>> | 84% | 50,546 psi | 89% | 2726 fps | 99.3% |
| Somchem S355 | <<locked>> | 90% | 49,211 psi | 87% | 2726 fps | 99.5% |
| Somchem S365ᴾ | <<locked>> | 100% | 49,110 psi | 87% | 2825 fps | 100% |
| Vihtavuori N133 | <<locked>> | 84% | 50,952 psi | 90% | 2628 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 49,777 psi | 88% | 2674 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 50,198 psi | 89% | 2680 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 49,893 psi | 88% | 2700 fps | 99.9% |
| Vihtavuori N160 | <<locked>> | 96% | 50,459 psi | 89% | 2766 fps | 98.4% |
| Vihtavuori N530 | <<locked>> | 82% | 49,734 psi | 88% | 2694 fps | 99.8% |
| Vihtavuori N540 | <<locked>> | 86% | 48,617 psi | 86% | 2677 fps | 100% |
| Vihtavuori N550 | <<locked>> | 96% | 49,748 psi | 88% | 2772 fps | 98.1% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 42,177 psi | 75% | 2710 fps | 97.7% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 50,720 psi | 90% | 2746 fps | 99.7% |
| Winchester 748 | <<locked>> | 82% | 49,342 psi | 87% | 2740 fps | 100% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 35,230 psi | 62% | 2621 fps | 97% |
| Winchester StaBALL Match | <<locked>> | 84% | 48,341 psi | 85% | 2717 fps | 99.4% |
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% | 42,641 psi | 75% | 2559 fps | 100% |
| Accurate 4064 | <<locked>> | 80% | 40,277 psi | 71% | 2549 fps | 100% |
| Accurate 4350 | <<locked>> | 88% | 37,913 psi | 67% | 2569 fps | 95.6% |
| ADI AR 2206H | <<locked>> | 80% | 44,860 psi | 79% | 2641 fps | 98.6% |
| ADI AR 2208 | <<locked>> | 80% | 38,174 psi | 67% | 2490 fps | 96.3% |
| ADI Benchmark 8208 | <<locked>> | 80% | 46,688 psi | 83% | 2648 fps | 99.5% |
| Alliant AR-Comp | <<locked>> | 80% | 46,818 psi | 83% | 2641 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 40,640 psi | 72% | 2661 fps | 96.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 38,189 psi | 68% | 2523 fps | 98% |
| Alliant Reloder-15 | <<locked>> | 80% | 40,756 psi | 72% | 2579 fps | 97.2% |
| Alliant Reloder-16 | <<locked>> | 88% | 37,681 psi | 67% | 2569 fps | 95.5% |
| Alliant Reloder-17 | 41.3 gr | 80% | 32,967 psi | 58% | 2477 fps | 95.5% |
| Alliant Reloder-23 | <<locked>> | 94% | 32,938 psi | 58% | 2477 fps | 95.3% |
| Alliant Reloder-26 | <<locked>> | 98% | 40,408 psi | 71% | 2713 fps | 95.5% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 43,714 psi | 77% | 2638 fps | 97.4% |
| Bofors RP3 | <<locked>> | 80% | 38,014 psi | 67% | 2530 fps | 98% |
| Hodgdon BL-C2 | <<locked>> | 80% | 45,759 psi | 81% | 2674 fps | 99.7% |
| Hodgdon H380 | <<locked>> | 80% | 38,769 psi | 69% | 2526 fps | 95.2% |
| Hodgdon H4895 | <<locked>> | 80% | 45,208 psi | 80% | 2654 fps | 99% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 32,967 psi | 58% | 2425 fps | 95.7% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 41,075 psi | 73% | 2621 fps | 98.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,847 psi | 47% | 1529 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 43,308 psi | 77% | 2602 fps | 98.7% |
| IMR 3031 | <<locked>> | 80% | 44,817 psi | 79% | 2654 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 40,074 psi | 71% | 2523 fps | 97.1% |
| IMR 4166 Enduron | <<locked>> | 84% | 47,964 psi | 85% | 2644 fps | 95.2% |
| IMR 4451 Enduron | <<locked>> | 90% | 47,601 psi | 84% | 2667 fps | 95% |
| IMR 4831 | <<locked>> | 88% | 36,695 psi | 65% | 2526 fps | 95.3% |
| IMR 4895 | <<locked>> | 80% | 41,640 psi | 74% | 2608 fps | 98% |
| IMR 8208 XBR | <<locked>> | 80% | 46,688 psi | 83% | 2648 fps | 99.5% |
| Lovex D073.6 | <<locked>> | 80% | 44,295 psi | 78% | 2628 fps | 99.9% |
| Lovex S060 | <<locked>> | 80% | 44,701 psi | 79% | 2575 fps | 98.6% |
| Lovex S062 | <<locked>> | 80% | 40,364 psi | 71% | 2536 fps | 98.8% |
| Lovex S065 | <<locked>> | 88% | 42,279 psi | 75% | 2575 fps | 95.3% |
| Lovex S070 | <<locked>> | 94% | 47,921 psi | 85% | 2697 fps | 95.5% |
| Norma 201 | <<locked>> | 80% | 44,353 psi | 78% | 2598 fps | 99.3% |
| Norma 202 | <<locked>> | 80% | 44,382 psi | 78% | 2608 fps | 100% |
| Norma 203B | <<locked>> | 80% | 40,147 psi | 71% | 2569 fps | 97.6% |
| Norma URP | <<locked>> | 88% | 37,956 psi | 67% | 2566 fps | 95.5% |
| Ramshot Big Game | <<locked>> | 80% | 39,436 psi | 70% | 2575 fps | 97.2% |
| Ramshot Hunter | <<locked>> | 94% | 44,411 psi | 79% | 2703 fps | 95.4% |
| Ramshot TAC | <<locked>> | 80% | 46,601 psi | 82% | 2648 fps | 96.7% |
| Ramshot Wild Boar | <<locked>> | 80% | 45,992 psi | 81% | 2671 fps | 98.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,093 psi | 48% | 1565 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 46,818 psi | 83% | 2661 fps | 95.7% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 42,337 psi | 75% | 2674 fps | 97.6% |
| ReloadSwiss RS 60 | 41.3 gr | 80% | 34,896 psi | 62% | 2543 fps | 98.7% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 37,391 psi | 66% | 2579 fps | 95% |
| ReloadSwiss RS 70 | 48.3 gr | 92% | 42,641 psi | 75% | 2694 fps | 95.7% |
| Rottweil R 902 | <<locked>> | 80% | 42,496 psi | 75% | 2556 fps | 99.1% |
| Rottweil R 903 | <<locked>> | 80% | 35,998 psi | 64% | 2477 fps | 97.2% |
| Shooters World Long Rifle | <<locked>> | 88% | 42,279 psi | 75% | 2575 fps | 95.3% |
| Shooters World Match Rifle | <<locked>> | 80% | 44,295 psi | 78% | 2628 fps | 99.9% |
| Shooters World Precision | <<locked>> | 80% | 40,364 psi | 71% | 2536 fps | 98.8% |
| Shooters World SW4350 | <<locked>> | 94% | 47,921 psi | 85% | 2697 fps | 95.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 36,318 psi | 64% | 2513 fps | 96.4% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 45,252 psi | 80% | 2628 fps | 96.9% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 43,236 psi | 76% | 2608 fps | 98.2% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 45,498 psi | 80% | 2552 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 38,029 psi | 67% | 2425 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 47,036 psi | 83% | 2615 fps | 95% |
| Somchem S335 | <<locked>> | 80% | 45,078 psi | 80% | 2556 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 44,570 psi | 79% | 2621 fps | 98.4% |
| Somchem S355 | <<locked>> | 80% | 36,535 psi | 65% | 2474 fps | 97.1% |
| Somchem S365 | <<locked>> | 82% | 28,819 psi | 51% | 2369 fps | 95.4% |
| Vihtavuori N133 | <<locked>> | 80% | 45,556 psi | 81% | 2546 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 41,640 psi | 74% | 2543 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 42,018 psi | 74% | 2543 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 34,824 psi | 62% | 2418 fps | 98% |
| Vihtavuori N160 | <<locked>> | 86% | 37,260 psi | 66% | 2513 fps | 95.1% |
| Vihtavuori N530 | <<locked>> | 80% | 46,746 psi | 83% | 2641 fps | 99.6% |
| Vihtavuori N540 | <<locked>> | 80% | 40,596 psi | 72% | 2536 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 88% | 39,030 psi | 69% | 2569 fps | 95.5% |
| Vihtavuori N555 | <<locked>> | 94% | 35,302 psi | 62% | 2556 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 32,938 psi | 58% | 2388 fps | 95.8% |
| Winchester 748 | <<locked>> | 80% | 46,079 psi | 81% | 2687 fps | 99.9% |
| Winchester StaBALL HD | <<locked>> | 98% | 33,112 psi | 59% | 2556 fps | 95.8% |
| Winchester StaBALL Match | <<locked>> | 80% | 42,496 psi | 75% | 2612 fps | 98.6% |
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 | 140gr | Impala RNFP KO. Alliant Reloder-17 delivers the highest muzzle velocity at 2,874 fps; across all powders the maximum-charge window runs from 1,709 fps to 2,874 fps. Alliant Reloder-23 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 62–90 %, leaving at least 10 % headroom. The 140.0 gr projectile in 0.284" calls for a 1:11.0 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 60, ReloadSwiss RS 70, Alliant Reloder-17 rank at the top here: for 7 x 57 with the .284 | 140gr | Impala RNFP KO 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.