Load Specifications
Load data in caliber 7 x 57 R with .284 | 120gr | Sierra Pro-Hunter 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 Bofors RP3.
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>> | 86% | 44,150 psi | 90% | 2835 fps | 100% |
| Accurate 4064 | <<locked>> | 88% | 44,396 psi | 90% | 2874 fps | 99.9% |
| ADI AR 2206H | <<locked>> | 82% | 42,801 psi | 87% | 2835 fps | 97.1% |
| ADI AR 2208 | <<locked>> | 88% | 43,787 psi | 89% | 2835 fps | 96.7% |
| Alliant AR-Comp | <<locked>> | 82% | 44,541 psi | 90% | 2858 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 44,454 psi | 90% | 2972 fps | 96.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 43,120 psi | 87% | 2858 fps | 98.1% |
| Alliant Reloder-15 | <<locked>> | 86% | 43,642 psi | 89% | 2871 fps | 96.8% |
| Alliant Reloder-17 | <<locked>> | 92% | 42,975 psi | 87% | 2946 fps | 97.7% |
| Bofors RP3 | <<locked>> | 88% | 42,975 psi | 87% | 2864 fps | 98.2% |
| Hodgdon BL-C2 | <<locked>> | 82% | 43,308 psi | 88% | 2864 fps | 98.9% |
| Hodgdon H4895 | <<locked>> | 82% | 43,149 psi | 88% | 2848 fps | 97.8% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 44,483 psi | 90% | 2904 fps | 98% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 44,599 psi | 90% | 2930 fps | 98.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,954 psi | 71% | 1873 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 44,222 psi | 90% | 2854 fps | 97.9% |
| IMR 3031 | <<locked>> | 82% | 42,221 psi | 86% | 2854 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 43,366 psi | 88% | 2822 fps | 96.8% |
| IMR 4831 | <<locked>> | 98% | 44,034 psi | 89% | 2907 fps | 96.3% |
| IMR 4895 | <<locked>> | 84% | 42,047 psi | 85% | 2851 fps | 97.1% |
| Lovex D073.6 | <<locked>> | 84% | 44,353 psi | 90% | 2874 fps | 99.6% |
| Lovex S060 | <<locked>> | 82% | 43,221 psi | 88% | 2776 fps | 97.3% |
| Lovex S062 | <<locked>> | 86% | 43,033 psi | 87% | 2825 fps | 98.4% |
| Norma 201 | <<locked>> | 82% | 41,829 psi | 85% | 2789 fps | 98.1% |
| Norma 202 | <<locked>> | 82% | 42,134 psi | 85% | 2805 fps | 99.7% |
| Norma 203B | <<locked>> | 86% | 42,917 psi | 87% | 2858 fps | 97.2% |
| Ramshot Big Game | <<locked>> | 86% | 42,699 psi | 87% | 2871 fps | 96.9% |
| Ramshot Wild Boar | <<locked>> | 82% | 44,266 psi | 90% | 2871 fps | 97.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,186 psi | 71% | 1916 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 42,757 psi | 87% | 2920 fps | 96.5% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 42,917 psi | 87% | 2959 fps | 99.5% |
| Rottweil R 902 | <<locked>> | 84% | 42,525 psi | 86% | 2792 fps | 98.3% |
| Rottweil R 903 | <<locked>> | 90% | 42,815 psi | 87% | 2854 fps | 97.9% |
| Shooters World Match Rifle | <<locked>> | 84% | 44,353 psi | 90% | 2874 fps | 99.6% |
| Shooters World Precision | <<locked>> | 86% | 43,033 psi | 87% | 2825 fps | 98.4% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 44,367 psi | 90% | 2913 fps | 97.4% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 44,034 psi | 89% | 2858 fps | 97.4% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 43,526 psi | 88% | 2756 fps | 99.8% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 43,250 psi | 88% | 2756 fps | 100% |
| Somchem S335 | <<locked>> | 82% | 42,931 psi | 87% | 2756 fps | 99.9% |
| Somchem S341 | <<locked>> | 82% | 42,656 psi | 87% | 2815 fps | 97% |
| Somchem S355 | <<locked>> | 90% | 43,801 psi | 89% | 2861 fps | 97.9% |
| Somchem S365ᴾ | <<locked>> | 100% | 43,714 psi | 89% | 2959 fps | 99.1% |
| Vihtavuori N133 | <<locked>> | 82% | 43,642 psi | 89% | 2756 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 44,106 psi | 89% | 2831 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 42,540 psi | 86% | 2792 fps | 99.8% |
| Vihtavuori N150 | <<locked>> | 90% | 41,858 psi | 85% | 2792 fps | 98.6% |
| Vihtavuori N540 | <<locked>> | 86% | 43,656 psi | 89% | 2825 fps | 99.7% |
| Vihtavuori N550 | <<locked>> | 96% | 44,556 psi | 90% | 2907 fps | 95.9% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 43,091 psi | 87% | 2831 fps | 97.8% |
| Winchester 748 | <<locked>> | 82% | 44,135 psi | 90% | 2890 fps | 99.2% |
| Winchester StaBALL Match | <<locked>> | 84% | 43,497 psi | 88% | 2861 fps | 97.9% |
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% | 36,230 psi | 73% | 2677 fps | 100% |
| Accurate 4064 | <<locked>> | 80% | 34,258 psi | 69% | 2657 fps | 98.7% |
| ADI AR 2206H | <<locked>> | 80% | 40,059 psi | 81% | 2776 fps | 96.4% |
| ADI AR 2208 | <<locked>> | 84% | 38,653 psi | 78% | 2723 fps | 95.1% |
| Alliant AR-Comp | <<locked>> | 80% | 41,408 psi | 84% | 2802 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 41,611 psi | 84% | 2907 fps | 95.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 33,315 psi | 68% | 2628 fps | 95.1% |
| Alliant Reloder-15 | <<locked>> | 82% | 38,406 psi | 78% | 2756 fps | 95.2% |
| Alliant Reloder-17 | 49.2 gr | 88% | 37,695 psi | 76% | 2818 fps | 96% |
| Bofors RP3 | 43.1 gr | 80% | 32,793 psi | 67% | 2628 fps | 95% |
| Hodgdon BL-C2 | <<locked>> | 80% | 40,509 psi | 82% | 2805 fps | 98.3% |
| Hodgdon H4895 | <<locked>> | 80% | 40,393 psi | 82% | 2789 fps | 97.1% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 36,970 psi | 75% | 2740 fps | 95.8% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 36,303 psi | 74% | 2743 fps | 96.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,962 psi | 53% | 1677 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 38,943 psi | 79% | 2740 fps | 96.6% |
| IMR 3031 | <<locked>> | 80% | 39,566 psi | 80% | 2799 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 38,145 psi | 77% | 2707 fps | 95.2% |
| IMR 4831 | <<locked>> | 96% | 41,147 psi | 83% | 2848 fps | 95.4% |
| IMR 4895 | <<locked>> | 80% | 36,782 psi | 75% | 2730 fps | 95.4% |
| Lovex D073.6 | <<locked>> | 80% | 38,667 psi | 78% | 2756 fps | 98.8% |
| Lovex S060 | <<locked>> | 80% | 40,712 psi | 83% | 2723 fps | 96.6% |
| Lovex S062 | <<locked>> | 80% | 35,650 psi | 72% | 2657 fps | 96.5% |
| Norma 201 | <<locked>> | 80% | 39,349 psi | 80% | 2733 fps | 97.6% |
| Norma 202 | <<locked>> | 80% | 39,378 psi | 80% | 2749 fps | 99.3% |
| Norma 203B | <<locked>> | 82% | 37,797 psi | 77% | 2743 fps | 95.7% |
| Ramshot Big Game | <<locked>> | 82% | 37,202 psi | 75% | 2746 fps | 95.2% |
| Ramshot Wild Boar | <<locked>> | 80% | 41,220 psi | 84% | 2808 fps | 96.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,005 psi | 53% | 1713 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 39,827 psi | 81% | 2854 fps | 95.6% |
| ReloadSwiss RS 60 | 44.7 gr | 80% | 30,734 psi | 62% | 2635 fps | 95.5% |
| Rottweil R 902 | <<locked>> | 80% | 37,449 psi | 76% | 2680 fps | 97% |
| Rottweil R 903 | <<locked>> | 84% | 35,259 psi | 72% | 2684 fps | 95.6% |
| Shooters World Match Rifle | <<locked>> | 80% | 38,667 psi | 78% | 2756 fps | 98.8% |
| Shooters World Precision | <<locked>> | 80% | 35,650 psi | 72% | 2657 fps | 96.5% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 36,390 psi | 74% | 2733 fps | 95% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 38,653 psi | 78% | 2740 fps | 95.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 40,872 psi | 83% | 2703 fps | 99.5% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 33,707 psi | 68% | 2556 fps | 99% |
| Somchem S335 | <<locked>> | 80% | 40,466 psi | 82% | 2707 fps | 99.8% |
| Somchem S341 | <<locked>> | 80% | 39,972 psi | 81% | 2759 fps | 96.3% |
| Somchem S355 | <<locked>> | 84% | 36,260 psi | 74% | 2694 fps | 95.7% |
| Somchem S365 | <<locked>> | 90% | 31,633 psi | 64% | 2661 fps | 95.2% |
| Vihtavuori N133 | <<locked>> | 80% | 41,002 psi | 83% | 2707 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 36,434 psi | 74% | 2680 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 37,420 psi | 76% | 2684 fps | 99.2% |
| Vihtavuori N150 | <<locked>> | 80% | 30,298 psi | 61% | 2520 fps | 95% |
| Vihtavuori N540 | <<locked>> | 80% | 36,042 psi | 73% | 2664 fps | 98.6% |
| Vihtavuori N550 | <<locked>> | 94% | 41,655 psi | 84% | 2848 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 35,418 psi | 72% | 2654 fps | 95.3% |
| Winchester 748 | <<locked>> | 80% | 41,249 psi | 84% | 2831 fps | 98.7% |
| Winchester StaBALL Match | <<locked>> | 80% | 37,840 psi | 77% | 2740 fps | 96.4% |
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 | 120gr | Sierra Pro-Hunter. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,972 fps; across all powders the maximum-charge window runs from 1,873 fps to 2,972 fps. Hodgdon Hybrid 100V 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 71–90 %, leaving at least 10 % headroom. The 120.0 gr projectile in 0.284" calls for a 1:16.0 twist; slower twists will usually not stabilise this weight. Hodgdon Hybrid 100V, 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, Bofors RP3 rank at the top here: for 7 x 57 R with the .284 | 120gr | Sierra Pro-Hunter 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.