Load Specifications
Load data in caliber 7 x 57 R with .284 | 140gr | Sierra Pro-Hunter bullet and 47 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 ReloadSwiss RS 62.
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% | 44,382 psi | 90% | 2618 fps | 100% |
| Accurate 4064 | <<locked>> | 86% | 44,599 psi | 90% | 2657 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 43,352 psi | 88% | 2707 fps | 97.4% |
| ADI AR 2208 | <<locked>> | 86% | 43,743 psi | 89% | 2628 fps | 97.9% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 44,208 psi | 90% | 2762 fps | 98% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 43,410 psi | 88% | 2654 fps | 99.1% |
| Alliant Reloder-15 | <<locked>> | 84% | 43,830 psi | 89% | 2667 fps | 98.1% |
| Alliant Reloder-16 | <<locked>> | 94% | 43,018 psi | 87% | 2717 fps | 97.5% |
| Alliant Reloder-17 | <<locked>> | 90% | 43,004 psi | 87% | 2746 fps | 98.9% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 36,680 psi | 74% | 2602 fps | 97.2% |
| Bofors RP3 | <<locked>> | 86% | 42,975 psi | 87% | 2654 fps | 99.1% |
| Hodgdon H380 | <<locked>> | 86% | 44,106 psi | 89% | 2661 fps | 97% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 42,032 psi | 85% | 2654 fps | 98.6% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 44,440 psi | 90% | 2710 fps | 99.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,375 psi | 72% | 1719 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 44,019 psi | 89% | 2638 fps | 98.9% |
| IMR 4064 | <<locked>> | 84% | 43,149 psi | 88% | 2612 fps | 98% |
| IMR 4831 | <<locked>> | 96% | 44,440 psi | 90% | 2707 fps | 97.7% |
| IMR 4895 | <<locked>> | 82% | 42,105 psi | 85% | 2641 fps | 98.3% |
| Lovex D073.6 | <<locked>> | 82% | 44,454 psi | 90% | 2657 fps | 100% |
| Lovex S062 | <<locked>> | 84% | 42,975 psi | 87% | 2615 fps | 99.3% |
| Norma 203B | <<locked>> | 84% | 43,149 psi | 88% | 2654 fps | 98.5% |
| Norma URP | <<locked>> | 94% | 43,308 psi | 88% | 2700 fps | 97.3% |
| Ramshot Big Game | <<locked>> | 84% | 42,627 psi | 86% | 2664 fps | 98.2% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,708 psi | 72% | 1759 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 42,989 psi | 87% | 2713 fps | 97.9% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 42,772 psi | 87% | 2749 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 43,120 psi | 87% | 2723 fps | 97% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 43,453 psi | 88% | 2736 fps | 96.3% |
| Rottweil R 902 | <<locked>> | 82% | 42,453 psi | 86% | 2585 fps | 99.2% |
| Rottweil R 903 | <<locked>> | 88% | 43,178 psi | 88% | 2654 fps | 99% |
| Shooters World Match Rifle | <<locked>> | 82% | 44,454 psi | 90% | 2657 fps | 100% |
| Shooters World Precision | <<locked>> | 84% | 42,975 psi | 87% | 2615 fps | 99.3% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 44,454 psi | 90% | 2707 fps | 98.6% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 43,947 psi | 89% | 2648 fps | 98.5% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 43,221 psi | 88% | 2546 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 43,932 psi | 89% | 2654 fps | 98.9% |
| Somchem S365 | <<locked>> | 98% | 43,947 psi | 89% | 2759 fps | 99.8% |
| Vihtavuori N135 | <<locked>> | 84% | 44,527 psi | 90% | 2615 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 42,409 psi | 86% | 2575 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 42,076 psi | 85% | 2592 fps | 99.5% |
| Vihtavuori N160 | <<locked>> | 92% | 42,554 psi | 86% | 2651 fps | 97% |
| Vihtavuori N540 | <<locked>> | 84% | 43,642 psi | 89% | 2615 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 44,570 psi | 90% | 2703 fps | 97.3% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 39,610 psi | 80% | 2680 fps | 97.2% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 42,786 psi | 87% | 2631 fps | 98.9% |
| Winchester StaBALL Match | <<locked>> | 82% | 43,366 psi | 88% | 2651 fps | 98.9% |
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% | 39,117 psi | 79% | 2526 fps | 100% |
| Accurate 4064 | <<locked>> | 80% | 36,970 psi | 75% | 2513 fps | 99.8% |
| Accurate 4350 | <<locked>> | 90% | 37,797 psi | 77% | 2592 fps | 95.9% |
| ADI AR 2208 | <<locked>> | 80% | 36,405 psi | 74% | 2474 fps | 96% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 38,696 psi | 78% | 2641 fps | 96.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 35,766 psi | 73% | 2493 fps | 97.5% |
| Alliant Reloder-15 | <<locked>> | 80% | 38,580 psi | 78% | 2559 fps | 96.8% |
| Alliant Reloder-16 | <<locked>> | 88% | 35,650 psi | 72% | 2546 fps | 95% |
| Alliant Reloder-17 | 43.3 gr | 82% | 32,996 psi | 67% | 2510 fps | 95.9% |
| Alliant Reloder-23 | <<locked>> | 96% | 32,648 psi | 66% | 2497 fps | 95.5% |
| Bofors RP3 | <<locked>> | 80% | 35,317 psi | 72% | 2497 fps | 97.5% |
| Hodgdon H380 | <<locked>> | 82% | 38,827 psi | 79% | 2556 fps | 95.5% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 30,792 psi | 62% | 2395 fps | 95% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 38,827 psi | 79% | 2598 fps | 98.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,310 psi | 53% | 1535 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 41,307 psi | 84% | 2589 fps | 98.4% |
| IMR 4064 | <<locked>> | 80% | 38,174 psi | 77% | 2510 fps | 96.8% |
| IMR 4831 | <<locked>> | 90% | 36,492 psi | 74% | 2546 fps | 95.5% |
| IMR 4895 | <<locked>> | 80% | 39,494 psi | 80% | 2589 fps | 97.7% |
| Lovex D073.6 | <<locked>> | 80% | 41,655 psi | 84% | 2605 fps | 99.8% |
| Lovex S062 | <<locked>> | 80% | 38,087 psi | 77% | 2516 fps | 98.5% |
| Norma 203B | <<locked>> | 80% | 37,942 psi | 77% | 2546 fps | 97.2% |
| Norma URP | <<locked>> | 90% | 38,087 psi | 77% | 2592 fps | 95.8% |
| Ramshot Big Game | <<locked>> | 80% | 37,347 psi | 76% | 2556 fps | 96.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,455 psi | 54% | 1568 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 40,190 psi | 82% | 2654 fps | 97.3% |
| ReloadSwiss RS 60 | 42.2 gr | 80% | 32,822 psi | 67% | 2516 fps | 98.3% |
| ReloadSwiss RS 62 | 47.4 gr | 90% | 37,376 psi | 76% | 2605 fps | 95.2% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 40,567 psi | 82% | 2674 fps | 95.3% |
| Rottweil R 902 | <<locked>> | 80% | 39,827 psi | 81% | 2533 fps | 98.8% |
| Rottweil R 903 | <<locked>> | 80% | 33,141 psi | 67% | 2438 fps | 96.5% |
| Shooters World Match Rifle | <<locked>> | 80% | 41,655 psi | 84% | 2605 fps | 99.8% |
| Shooters World Precision | <<locked>> | 80% | 38,087 psi | 77% | 2516 fps | 98.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 34,272 psi | 70% | 2490 fps | 95.9% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 41,263 psi | 84% | 2595 fps | 98% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 35,969 psi | 73% | 2408 fps | 99.9% |
| Somchem S355 | <<locked>> | 80% | 34,200 psi | 69% | 2451 fps | 96.6% |
| Somchem S365 | <<locked>> | 84% | 27,992 psi | 57% | 2375 fps | 95.2% |
| Vihtavuori N135 | <<locked>> | 80% | 39,204 psi | 80% | 2523 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 39,755 psi | 81% | 2526 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 32,401 psi | 66% | 2388 fps | 97.4% |
| Vihtavuori N160 | <<locked>> | 88% | 37,391 psi | 76% | 2543 fps | 95.4% |
| Vihtavuori N540 | <<locked>> | 80% | 38,247 psi | 78% | 2513 fps | 99.7% |
| Vihtavuori N550 | <<locked>> | 90% | 39,233 psi | 80% | 2598 fps | 95.8% |
| Vihtavuori N555 | <<locked>> | 96% | 34,954 psi | 71% | 2575 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 30,850 psi | 63% | 2359 fps | 95.1% |
| Winchester StaBALL Match | <<locked>> | 80% | 40,466 psi | 82% | 2592 fps | 98.4% |
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 74 powders for 7 x 57 R loaded with the .284 | 140gr | Sierra Pro-Hunter. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,762 fps; across all powders the maximum-charge window runs from 1,719 fps to 2,762 fps. Accurate 3100 gives the best case fill at 100 %, and 74 of the 74 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (340 MPa), the top charges use 67–90 %, leaving at least 10 % headroom. The 140.0 gr projectile in 0.284" calls for a 1:12.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, Alliant Reloder-23, Alliant Reloder-26 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, ReloadSwiss RS 62 rank at the top here: for 7 x 57 R with the .284 | 140gr | Sierra Pro-Hunter they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 2700, Accurate 3100, ADI AR 2209 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.