Load Specifications
Load data in caliber 7 x 57 R with .284 | 127gr | Geco ZERO bullet and 62 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 Ramshot Big Game.
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 2015 | <<locked>> | 82% | 43,091 psi | 87% | 2674 fps | 100% |
| Accurate 2495 | <<locked>> | 88% | 42,656 psi | 87% | 2720 fps | 100% |
| Accurate 2520 | <<locked>> | 82% | 42,090 psi | 85% | 2726 fps | 99.4% |
| Accurate 4064 | <<locked>> | 90% | 42,670 psi | 87% | 2753 fps | 99.9% |
| Accurate 4350ᴾ | <<locked>> | 100% | 44,309 psi | 90% | 2838 fps | 96.2% |
| ADI AR 2206H | <<locked>> | 84% | 42,337 psi | 86% | 2730 fps | 97% |
| ADI AR 2208 | <<locked>> | 90% | 43,366 psi | 88% | 2730 fps | 96.5% |
| ADI Benchmark 8208 | <<locked>> | 82% | 41,785 psi | 85% | 2690 fps | 98.1% |
| Alliant AR-Comp | <<locked>> | 84% | 43,526 psi | 88% | 2746 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 88% | 44,019 psi | 89% | 2861 fps | 96.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 90% | 42,395 psi | 86% | 2749 fps | 98% |
| Alliant Reloder-15 | <<locked>> | 88% | 42,917 psi | 87% | 2762 fps | 96.7% |
| Alliant Reloder-17 | <<locked>> | 94% | 42,395 psi | 86% | 2835 fps | 97.5% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 44,324 psi | 90% | 2785 fps | 96.4% |
| Bofors RP3 | <<locked>> | 90% | 41,945 psi | 85% | 2753 fps | 98% |
| Hodgdon Benchmark | <<locked>> | 82% | 43,947 psi | 89% | 2694 fps | 98.9% |
| Hodgdon BL-C2 | <<locked>> | 84% | 42,627 psi | 86% | 2759 fps | 98.8% |
| Hodgdon CFE223 | <<locked>> | 82% | 44,019 psi | 89% | 2841 fps | 96.9% |
| Hodgdon H4895 | <<locked>> | 84% | 42,656 psi | 87% | 2743 fps | 97.7% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 41,002 psi | 83% | 2736 fps | 97.1% |
| Hodgdon LEVERevolution | <<locked>> | 88% | 43,787 psi | 89% | 2815 fps | 98.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,461 psi | 70% | 1778 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 43,859 psi | 89% | 2749 fps | 97.9% |
| IMR 3031 | <<locked>> | 86% | 44,251 psi | 90% | 2799 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 42,902 psi | 87% | 2717 fps | 96.7% |
| IMR 4831ᴾ | <<locked>> | 100% | 42,598 psi | 86% | 2785 fps | 95.9% |
| IMR 4895 | <<locked>> | 88% | 43,961 psi | 89% | 2795 fps | 97.5% |
| IMR 8208 XBR | <<locked>> | 82% | 41,785 psi | 85% | 2690 fps | 98.1% |
| Lovex D073.6 | <<locked>> | 86% | 43,410 psi | 88% | 2762 fps | 99.5% |
| Lovex S060 | <<locked>> | 84% | 43,120 psi | 87% | 2677 fps | 97.3% |
| Lovex S062 | <<locked>> | 88% | 42,308 psi | 86% | 2717 fps | 98.3% |
| Norma 201 | <<locked>> | 86% | 43,787 psi | 89% | 2733 fps | 98.5% |
| Norma 202 | <<locked>> | 86% | 44,338 psi | 90% | 2756 fps | 99.8% |
| Norma 203B | <<locked>> | 88% | 42,163 psi | 86% | 2749 fps | 97.1% |
| Ramshot Big Game | <<locked>> | 88% | 42,047 psi | 85% | 2762 fps | 96.8% |
| Ramshot Wild Boar | <<locked>> | 84% | 43,845 psi | 89% | 2766 fps | 97.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,635 psi | 70% | 1818 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 86% | 41,959 psi | 85% | 2808 fps | 96.4% |
| ReloadSwiss RS 60 | <<locked>> | 92% | 42,163 psi | 86% | 2844 fps | 99.4% |
| Rottweil R 901 | <<locked>> | 82% | 42,221 psi | 86% | 2684 fps | 99.5% |
| Rottweil R 902 | <<locked>> | 88% | 44,382 psi | 90% | 2736 fps | 98.6% |
| Rottweil R 903 | <<locked>> | 94% | 44,556 psi | 90% | 2795 fps | 98.2% |
| Shooters World Match Rifle | <<locked>> | 86% | 43,410 psi | 88% | 2762 fps | 99.5% |
| Shooters World Precision | <<locked>> | 88% | 42,308 psi | 86% | 2717 fps | 98.3% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 43,598 psi | 88% | 2802 fps | 97.3% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 43,555 psi | 88% | 2749 fps | 97.3% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 43,323 psi | 88% | 2654 fps | 99.7% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 42,873 psi | 87% | 2654 fps | 100% |
| Somchem S335 | <<locked>> | 84% | 42,554 psi | 86% | 2654 fps | 99.9% |
| Somchem S341 | <<locked>> | 84% | 42,279 psi | 86% | 2713 fps | 96.9% |
| Somchem S355 | <<locked>> | 92% | 42,902 psi | 87% | 2749 fps | 97.7% |
| Somchem S365ᴾ | <<locked>> | 100% | 39,813 psi | 81% | 2782 fps | 98.3% |
| Vihtavuori N133 | <<locked>> | 84% | 43,468 psi | 88% | 2654 fps | 100% |
| Vihtavuori N135 | <<locked>> | 88% | 43,381 psi | 88% | 2726 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 41,872 psi | 85% | 2684 fps | 99.8% |
| Vihtavuori N150 | <<locked>> | 94% | 43,816 psi | 89% | 2736 fps | 98.9% |
| Vihtavuori N160 | <<locked>> | 98% | 44,396 psi | 90% | 2789 fps | 95.9% |
| Vihtavuori N530 | <<locked>> | 84% | 44,614 psi | 90% | 2743 fps | 98.7% |
| Vihtavuori N540 | <<locked>> | 88% | 42,888 psi | 87% | 2720 fps | 99.7% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 42,685 psi | 87% | 2726 fps | 97.6% |
| Winchester 748 | <<locked>> | 84% | 43,729 psi | 89% | 2785 fps | 99.2% |
| Winchester StaBALL Match | <<locked>> | 86% | 42,815 psi | 87% | 2753 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 2015 | <<locked>> | 80% | 40,176 psi | 81% | 2621 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 32,401 psi | 66% | 2513 fps | 99.8% |
| Accurate 2520 | <<locked>> | 80% | 38,972 psi | 79% | 2664 fps | 98.9% |
| Accurate 4064 | <<locked>> | 80% | 30,705 psi | 62% | 2487 fps | 97.8% |
| Accurate 4350 | <<locked>> | 98% | 41,437 psi | 84% | 2782 fps | 95.4% |
| ADI AR 2206H | <<locked>> | 80% | 36,999 psi | 75% | 2615 fps | 95.4% |
| ADI AR 2208 | <<locked>> | 86% | 38,218 psi | 78% | 2621 fps | 95% |
| ADI Benchmark 8208 | <<locked>> | 80% | 39,073 psi | 79% | 2635 fps | 97.4% |
| Alliant AR-Comp | <<locked>> | 80% | 38,087 psi | 77% | 2651 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 41,205 psi | 84% | 2799 fps | 95.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 32,663 psi | 66% | 2530 fps | 95% |
| Alliant Reloder-15 | <<locked>> | 84% | 37,768 psi | 77% | 2651 fps | 95.1% |
| Alliant Reloder-17 | 45.8 gr | 90% | 36,883 psi | 75% | 2707 fps | 95.6% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 41,466 psi | 84% | 2726 fps | 95.6% |
| Bofors RP3 | <<locked>> | 84% | 33,953 psi | 69% | 2579 fps | 95.6% |
| Hodgdon Benchmark | <<locked>> | 80% | 41,162 psi | 83% | 2638 fps | 98.4% |
| Hodgdon BL-C2 | <<locked>> | 80% | 37,246 psi | 76% | 2644 fps | 97.6% |
| Hodgdon CFE223 | <<locked>> | 80% | 40,857 psi | 83% | 2776 fps | 96% |
| Hodgdon H4895 | <<locked>> | 80% | 37,275 psi | 76% | 2625 fps | 96.2% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 36,013 psi | 73% | 2625 fps | 95.4% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 33,460 psi | 68% | 2582 fps | 95.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,425 psi | 52% | 1588 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 36,042 psi | 73% | 2582 fps | 95.7% |
| IMR 3031 | <<locked>> | 80% | 36,129 psi | 73% | 2638 fps | 99.8% |
| IMR 4064 | <<locked>> | 84% | 37,695 psi | 76% | 2605 fps | 95.1% |
| IMR 4831 | <<locked>> | 98% | 40,030 psi | 81% | 2733 fps | 95.1% |
| IMR 4895 | <<locked>> | 82% | 36,085 psi | 73% | 2625 fps | 95.2% |
| IMR 8208 XBR | <<locked>> | 80% | 39,073 psi | 79% | 2635 fps | 97.4% |
| Lovex D073.6 | <<locked>> | 80% | 35,186 psi | 71% | 2589 fps | 98% |
| Lovex S060 | <<locked>> | 80% | 38,058 psi | 77% | 2569 fps | 95.8% |
| Lovex S062 | <<locked>> | 80% | 32,663 psi | 66% | 2500 fps | 95.5% |
| Norma 201 | <<locked>> | 80% | 36,230 psi | 73% | 2572 fps | 96.7% |
| Norma 202 | <<locked>> | 80% | 36,347 psi | 74% | 2592 fps | 98.9% |
| Norma 203B | <<locked>> | 84% | 37,072 psi | 75% | 2638 fps | 95.5% |
| Ramshot Big Game | 43.4 gr | 84% | 36,593 psi | 74% | 2644 fps | 95% |
| Ramshot Wild Boar | <<locked>> | 80% | 38,145 psi | 77% | 2648 fps | 95.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,440 psi | 52% | 1621 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 39,146 psi | 79% | 2749 fps | 95.5% |
| ReloadSwiss RS 60 | 41.8 gr | 82% | 30,269 psi | 61% | 2533 fps | 95.3% |
| Rottweil R 901 | <<locked>> | 80% | 39,769 psi | 81% | 2635 fps | 99.2% |
| Rottweil R 902 | <<locked>> | 80% | 34,301 psi | 70% | 2520 fps | 96.1% |
| Rottweil R 903 | <<locked>> | 86% | 34,113 psi | 69% | 2572 fps | 95.3% |
| Shooters World Match Rifle | <<locked>> | 80% | 35,186 psi | 71% | 2589 fps | 98% |
| Shooters World Precision | <<locked>> | 80% | 32,663 psi | 66% | 2500 fps | 95.5% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 38,189 psi | 77% | 2687 fps | 95.7% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 38,189 psi | 77% | 2638 fps | 95.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 38,014 psi | 77% | 2549 fps | 99.1% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 31,053 psi | 63% | 2408 fps | 98.4% |
| Somchem S335 | <<locked>> | 80% | 37,507 psi | 76% | 2556 fps | 99.5% |
| Somchem S341 | <<locked>> | 80% | 36,738 psi | 75% | 2595 fps | 95.2% |
| Somchem S355 | <<locked>> | 86% | 35,215 psi | 71% | 2585 fps | 95.4% |
| Somchem S365 | <<locked>> | 94% | 32,721 psi | 66% | 2608 fps | 95.8% |
| Vihtavuori N133 | <<locked>> | 80% | 38,159 psi | 77% | 2559 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 33,257 psi | 67% | 2523 fps | 99.8% |
| Vihtavuori N140 | <<locked>> | 80% | 34,330 psi | 70% | 2526 fps | 98.7% |
| Vihtavuori N150 | <<locked>> | 84% | 31,386 psi | 64% | 2470 fps | 95.6% |
| Vihtavuori N160 | <<locked>> | 96% | 41,452 psi | 84% | 2733 fps | 95.1% |
| Vihtavuori N530 | <<locked>> | 80% | 39,131 psi | 79% | 2635 fps | 97.6% |
| Vihtavuori N540 | <<locked>> | 80% | 33,025 psi | 67% | 2507 fps | 97.9% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 37,275 psi | 76% | 2612 fps | 96% |
| Winchester 748 | <<locked>> | 80% | 38,072 psi | 77% | 2671 fps | 98.1% |
| Winchester StaBALL Match | <<locked>> | 80% | 34,693 psi | 70% | 2575 fps | 95.3% |
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 87 powders for 7 x 57 R loaded with the .284 | 127gr | Geco ZERO. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,861 fps; across all powders the maximum-charge window runs from 1,778 fps to 2,861 fps. Accurate 4350 gives the best case fill at 100 %, and 87 of the 87 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (340 MPa), the top charges use 64–90 %, leaving at least 10 % headroom. The 127.0 gr projectile in 0.284" calls for a 1:10.5 twist; slower twists will usually not stabilise this weight. Accurate 4350, Alliant Reloder-23, 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, Alliant Reloder-17, Ramshot Big Game rank at the top here: for 7 x 57 R with the .284 | 127gr | Geco ZERO they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 2700, Alliant Reloder-23, Bofors RP7 burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.