Load Specifications
Load data in caliber 7 x 57 R with .284 | 140gr | Barnes X S bullet and 44 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-16, Somchem S365 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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Max Load - Barrel Length: 23.62"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2495 | <<locked>> | 82% | 44,454 psi | 90% | 2575 fps | 100% |
| Accurate 4064 | <<locked>> | 84% | 44,570 psi | 90% | 2618 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 42,148 psi | 85% | 2644 fps | 96.7% |
| ADI AR 2208 | <<locked>> | 84% | 42,351 psi | 86% | 2566 fps | 97.3% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 42,540 psi | 86% | 2687 fps | 97.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 44,570 psi | 90% | 2638 fps | 99.1% |
| Alliant Reloder-15 | <<locked>> | 82% | 42,482 psi | 86% | 2602 fps | 97.5% |
| Alliant Reloder-16 | <<locked>> | 94% | 44,005 psi | 89% | 2697 fps | 97.4% |
| Alliant Reloder-17 | <<locked>> | 90% | 43,918 psi | 89% | 2726 fps | 98.8% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 38,159 psi | 77% | 2598 fps | 97.2% |
| Bofors RP3 | <<locked>> | 84% | 42,206 psi | 86% | 2602 fps | 98.8% |
| Hodgdon H380 | <<locked>> | 84% | 42,786 psi | 87% | 2598 fps | 96.3% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 43,149 psi | 88% | 2638 fps | 98.6% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 42,685 psi | 87% | 2641 fps | 98.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,708 psi | 72% | 1696 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 44,498 psi | 90% | 2598 fps | 98% |
| IMR 4831 | <<locked>> | 94% | 43,018 psi | 87% | 2644 fps | 97.1% |
| IMR 4895 | <<locked>> | 82% | 43,453 psi | 88% | 2631 fps | 98.3% |
| Lovex S062 | <<locked>> | 84% | 44,469 psi | 90% | 2605 fps | 99.3% |
| Norma 203B | <<locked>> | 84% | 44,280 psi | 90% | 2638 fps | 98.4% |
| Norma URP | <<locked>> | 94% | 44,498 psi | 90% | 2690 fps | 97.2% |
| Ramshot Big Game | <<locked>> | 84% | 43,845 psi | 89% | 2654 fps | 98.2% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,201 psi | 73% | 1739 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 44,222 psi | 90% | 2700 fps | 97.9% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 43,816 psi | 89% | 2733 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 44,150 psi | 90% | 2710 fps | 96.9% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 44,382 psi | 90% | 2717 fps | 96.1% |
| Rottweil R 902 | <<locked>> | 82% | 44,251 psi | 90% | 2575 fps | 99.2% |
| Rottweil R 903 | <<locked>> | 86% | 42,380 psi | 86% | 2598 fps | 98.6% |
| Shooters World Precision | <<locked>> | 84% | 44,469 psi | 90% | 2605 fps | 99.3% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 42,844 psi | 87% | 2641 fps | 98% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 44,541 psi | 90% | 2533 fps | 100% |
| Somchem S355 | <<locked>> | 86% | 42,873 psi | 87% | 2595 fps | 98.5% |
| Somchem S365 | <<locked>> | 96% | 42,540 psi | 86% | 2697 fps | 99.5% |
| Vihtavuori N135 | <<locked>> | 82% | 43,120 psi | 87% | 2556 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 43,830 psi | 89% | 2566 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 43,381 psi | 88% | 2579 fps | 99.4% |
| Vihtavuori N160 | <<locked>> | 92% | 43,656 psi | 89% | 2635 fps | 96.9% |
| Vihtavuori N540 | <<locked>> | 82% | 42,119 psi | 85% | 2552 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 92% | 42,902 psi | 87% | 2638 fps | 96.5% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 41,176 psi | 84% | 2677 fps | 97.3% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 43,947 psi | 89% | 2618 fps | 98.8% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 34,403 psi | 70% | 2579 fps | 96.2% |
| Winchester StaBALL Match | <<locked>> | 82% | 44,454 psi | 90% | 2635 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% | 41,959 psi | 85% | 2533 fps | 100% |
| Accurate 4064 | <<locked>> | 80% | 39,581 psi | 80% | 2523 fps | 99.9% |
| Accurate 4350 | <<locked>> | 88% | 37,173 psi | 75% | 2543 fps | 95.2% |
| ADI AR 2208 | <<locked>> | 80% | 37,608 psi | 76% | 2464 fps | 96% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 39,711 psi | 81% | 2625 fps | 96.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 37,391 psi | 76% | 2493 fps | 97.7% |
| Alliant Reloder-15 | <<locked>> | 80% | 39,900 psi | 81% | 2549 fps | 96.9% |
| Alliant Reloder-16 | 41.2 gr | 88% | 37,072 psi | 75% | 2539 fps | 95% |
| Alliant Reloder-17 | 40.3 gr | 80% | 32,401 psi | 66% | 2451 fps | 95.1% |
| Alliant Reloder-23 | <<locked>> | 96% | 34,055 psi | 69% | 2497 fps | 95.6% |
| Bofors RP3 | <<locked>> | 80% | 37,188 psi | 75% | 2497 fps | 97.7% |
| Hodgdon H380 | <<locked>> | 82% | 40,190 psi | 82% | 2543 fps | 95.5% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 32,401 psi | 66% | 2398 fps | 95.3% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 40,074 psi | 81% | 2589 fps | 98.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,600 psi | 54% | 1512 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 39,479 psi | 80% | 2497 fps | 96.8% |
| IMR 4831 | <<locked>> | 90% | 37,840 psi | 77% | 2539 fps | 95.6% |
| IMR 4895 | <<locked>> | 80% | 40,857 psi | 83% | 2579 fps | 97.7% |
| Lovex S062 | <<locked>> | 80% | 39,769 psi | 81% | 2513 fps | 98.6% |
| Norma 203B | <<locked>> | 80% | 39,305 psi | 80% | 2539 fps | 97.3% |
| Norma URP | <<locked>> | 88% | 37,072 psi | 75% | 2533 fps | 95% |
| Ramshot Big Game | <<locked>> | 80% | 38,493 psi | 78% | 2543 fps | 96.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,122 psi | 55% | 1552 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 41,379 psi | 84% | 2644 fps | 97.2% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 34,301 psi | 70% | 2516 fps | 98.4% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 38,972 psi | 79% | 2602 fps | 95.4% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 41,771 psi | 85% | 2661 fps | 95.2% |
| Rottweil R 902 | <<locked>> | 80% | 41,655 psi | 84% | 2526 fps | 98.8% |
| Rottweil R 903 | <<locked>> | 80% | 35,201 psi | 71% | 2448 fps | 96.8% |
| Shooters World Precision | <<locked>> | 80% | 39,769 psi | 81% | 2513 fps | 98.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 35,650 psi | 72% | 2484 fps | 96% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 37,159 psi | 75% | 2398 fps | 99.9% |
| Somchem S355 | <<locked>> | 80% | 35,998 psi | 73% | 2451 fps | 96.8% |
| Somchem S365 | 40.1 gr | 84% | 29,805 psi | 60% | 2385 fps | 95.7% |
| Vihtavuori N135 | <<locked>> | 80% | 40,669 psi | 82% | 2513 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 41,147 psi | 83% | 2516 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 34,098 psi | 69% | 2388 fps | 97.7% |
| Vihtavuori N160 | <<locked>> | 88% | 38,740 psi | 79% | 2533 fps | 95.4% |
| Vihtavuori N540 | <<locked>> | 80% | 39,914 psi | 81% | 2510 fps | 99.8% |
| Vihtavuori N550 | <<locked>> | 88% | 38,159 psi | 77% | 2536 fps | 95.1% |
| Vihtavuori N555 | <<locked>> | 94% | 34,534 psi | 70% | 2526 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 32,329 psi | 66% | 2359 fps | 95.3% |
| Winchester StaBALL HD | <<locked>> | 98% | 32,445 psi | 66% | 2516 fps | 95% |
| Winchester StaBALL Match | <<locked>> | 80% | 41,771 psi | 85% | 2582 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 44 powders for 7 x 57 R loaded with the .284 | 140gr | Barnes X S. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,733 fps; across all powders the maximum-charge window runs from 1,696 fps to 2,733 fps. Alliant Reloder-23 gives the best case fill at 100 %, and 44 of the 44 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (340 MPa), the top charges use 70–90 %, leaving at least 10 % headroom. The 140.0 gr projectile in 0.284" calls for a 1:10.5 twist; slower twists will usually not stabilise this weight. Alliant Reloder-23, 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. Alliant Reloder-16, Somchem S365, Alliant Reloder-17 rank at the top here: for 7 x 57 R with the .284 | 140gr | 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.