Load Specifications
Load data in caliber 7 x 57 R with .284 | 120gr | Barnes X S bullet and 43 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 Somchem S365.
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% | 43,845 psi | 89% | 2789 fps | 100% |
| Accurate 4064 | <<locked>> | 86% | 43,743 psi | 89% | 2822 fps | 99.8% |
| ADI AR 2206H | <<locked>> | 82% | 44,077 psi | 89% | 2822 fps | 97.1% |
| ADI AR 2208 | <<locked>> | 86% | 42,119 psi | 85% | 2762 fps | 95.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 44,324 psi | 90% | 2848 fps | 98% |
| Alliant Reloder-15 | <<locked>> | 84% | 42,279 psi | 86% | 2805 fps | 96% |
| Alliant Reloder-17 | <<locked>> | 92% | 43,816 psi | 89% | 2927 fps | 97.5% |
| Bofors RP3 | <<locked>> | 88% | 44,483 psi | 90% | 2858 fps | 98.2% |
| Hodgdon H4895 | <<locked>> | 82% | 44,382 psi | 90% | 2835 fps | 97.7% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 42,612 psi | 86% | 2828 fps | 97.1% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 42,598 psi | 86% | 2851 fps | 97.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,331 psi | 72% | 1850 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 42,308 psi | 86% | 2776 fps | 97.1% |
| IMR 3031 | <<locked>> | 82% | 43,468 psi | 88% | 2844 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 44,222 psi | 90% | 2802 fps | 96.6% |
| IMR 4895 | <<locked>> | 84% | 43,163 psi | 88% | 2838 fps | 97% |
| Lovex D073.6 | <<locked>> | 82% | 42,989 psi | 87% | 2808 fps | 99.3% |
| Lovex S060 | <<locked>> | 82% | 44,121 psi | 89% | 2756 fps | 97.1% |
| Lovex S062 | <<locked>> | 86% | 44,309 psi | 90% | 2812 fps | 98.4% |
| Norma 201 | <<locked>> | 82% | 43,685 psi | 89% | 2782 fps | 98.2% |
| Norma 202 | <<locked>> | 82% | 43,366 psi | 88% | 2795 fps | 99.6% |
| Norma 203B | <<locked>> | 86% | 44,179 psi | 90% | 2848 fps | 97.2% |
| Ramshot Big Game | <<locked>> | 86% | 43,439 psi | 88% | 2851 fps | 96.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,694 psi | 72% | 1893 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 43,772 psi | 89% | 2907 fps | 96.4% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 43,613 psi | 88% | 2936 fps | 99.4% |
| Rottweil R 902 | <<locked>> | 84% | 43,947 psi | 89% | 2779 fps | 98.2% |
| Rottweil R 903 | <<locked>> | 90% | 44,309 psi | 90% | 2844 fps | 97.8% |
| Shooters World Match Rifle | <<locked>> | 82% | 42,989 psi | 87% | 2808 fps | 99.3% |
| Shooters World Precision | <<locked>> | 86% | 44,309 psi | 90% | 2812 fps | 98.4% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 42,583 psi | 86% | 2841 fps | 96.6% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 42,308 psi | 86% | 2782 fps | 96.6% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 44,382 psi | 90% | 2740 fps | 100% |
| Somchem S335 | <<locked>> | 82% | 44,512 psi | 90% | 2746 fps | 99.9% |
| Somchem S341 | <<locked>> | 82% | 43,569 psi | 88% | 2795 fps | 96.8% |
| Somchem S355 | <<locked>> | 88% | 42,395 psi | 86% | 2795 fps | 97.2% |
| Somchem S365ᴾ | <<locked>> | 100% | 44,498 psi | 90% | 2940 fps | 98.9% |
| Vihtavuori N135 | <<locked>> | 84% | 42,888 psi | 87% | 2776 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 43,468 psi | 88% | 2772 fps | 99.8% |
| Vihtavuori N150 | <<locked>> | 90% | 43,033 psi | 87% | 2779 fps | 98.5% |
| Vihtavuori N540 | <<locked>> | 84% | 42,119 psi | 85% | 2762 fps | 99.4% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 43,903 psi | 89% | 2808 fps | 97.6% |
| Winchester StaBALL Match | <<locked>> | 84% | 44,440 psi | 90% | 2844 fps | 97.8% |
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% | 39,059 psi | 79% | 2697 fps | 100% |
| Accurate 4064 | <<locked>> | 80% | 36,869 psi | 75% | 2674 fps | 99% |
| ADI AR 2206H | <<locked>> | 80% | 41,336 psi | 84% | 2762 fps | 96.4% |
| ADI AR 2208 | <<locked>> | 84% | 39,682 psi | 80% | 2710 fps | 95% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 34,882 psi | 71% | 2631 fps | 95.3% |
| Alliant Reloder-15 | <<locked>> | 82% | 39,784 psi | 81% | 2749 fps | 95.3% |
| Alliant Reloder-17 | 46.8 gr | 88% | 38,769 psi | 79% | 2805 fps | 95.8% |
| Bofors RP3 | <<locked>> | 80% | 34,664 psi | 70% | 2638 fps | 95.4% |
| Hodgdon H4895 | <<locked>> | 80% | 41,597 psi | 84% | 2776 fps | 97% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 38,029 psi | 77% | 2723 fps | 95.7% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 37,594 psi | 76% | 2736 fps | 96.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,484 psi | 54% | 1657 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 39,856 psi | 81% | 2723 fps | 96.5% |
| IMR 3031 | <<locked>> | 80% | 40,756 psi | 83% | 2789 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 39,233 psi | 80% | 2694 fps | 95.2% |
| IMR 4895 | <<locked>> | 80% | 38,101 psi | 77% | 2723 fps | 95.4% |
| Lovex D073.6 | <<locked>> | 80% | 40,422 psi | 82% | 2753 fps | 98.9% |
| Lovex S060 | <<locked>> | 80% | 41,597 psi | 84% | 2703 fps | 96.5% |
| Lovex S062 | <<locked>> | 80% | 37,159 psi | 75% | 2654 fps | 96.6% |
| Norma 201 | <<locked>> | 80% | 41,162 psi | 83% | 2730 fps | 97.7% |
| Norma 202 | <<locked>> | 80% | 40,843 psi | 83% | 2743 fps | 99.4% |
| Norma 203B | <<locked>> | 82% | 39,204 psi | 80% | 2740 fps | 95.8% |
| Ramshot Big Game | <<locked>> | 82% | 38,435 psi | 78% | 2740 fps | 95.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,658 psi | 54% | 1693 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 40,915 psi | 83% | 2841 fps | 95.5% |
| ReloadSwiss RS 60 | 42.5 gr | 80% | 32,082 psi | 65% | 2635 fps | 95.7% |
| Rottweil R 902 | <<locked>> | 80% | 39,247 psi | 80% | 2680 fps | 97.2% |
| Rottweil R 903 | <<locked>> | 82% | 34,722 psi | 70% | 2631 fps | 95% |
| Shooters World Match Rifle | <<locked>> | 80% | 40,422 psi | 82% | 2753 fps | 98.9% |
| Shooters World Precision | <<locked>> | 80% | 37,159 psi | 75% | 2654 fps | 96.6% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 37,681 psi | 76% | 2730 fps | 95% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 39,885 psi | 81% | 2730 fps | 95.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 34,896 psi | 71% | 2546 fps | 99% |
| Somchem S335 | <<locked>> | 80% | 42,018 psi | 85% | 2700 fps | 99.8% |
| Somchem S341 | <<locked>> | 80% | 40,814 psi | 83% | 2740 fps | 96.1% |
| Somchem S355 | <<locked>> | 82% | 35,752 psi | 73% | 2641 fps | 95.1% |
| Somchem S365 | 45.4 gr | 90% | 33,141 psi | 67% | 2664 fps | 95.4% |
| Vihtavuori N135 | <<locked>> | 80% | 37,855 psi | 77% | 2674 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 38,566 psi | 78% | 2671 fps | 99.2% |
| Vihtavuori N150 | <<locked>> | 80% | 31,807 psi | 65% | 2523 fps | 95.3% |
| Vihtavuori N540 | <<locked>> | 80% | 37,231 psi | 76% | 2654 fps | 98.6% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 36,463 psi | 74% | 2641 fps | 95.2% |
| Winchester StaBALL Match | <<locked>> | 80% | 39,204 psi | 80% | 2733 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 43 powders for 7 x 57 R loaded with the .284 | 120gr | Barnes X S. Somchem S365 delivers the highest muzzle velocity at 2,940 fps; across all powders the maximum-charge window runs from 1,850 fps to 2,940 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 43 of the 43 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 120.0 gr projectile in 0.284" calls for a 1:12.0 twist; slower twists will usually not stabilise this weight. Hodgdon TrailBoss, ReloadSwiss RS 14, Somchem S365 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, Somchem S365 rank at the top here: for 7 x 57 R with the .284 | 120gr | Barnes X S 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.