Load Specifications
Load data in caliber 7 x 57 R with .284 | 140gr | Barnes X BT bullet and 46 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% | 44,512 psi | 90% | 2579 fps | 100% |
| Accurate 4064 | <<locked>> | 82% | 41,945 psi | 85% | 2572 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 42,250 psi | 86% | 2648 fps | 96.8% |
| ADI AR 2208 | <<locked>> | 84% | 42,409 psi | 86% | 2569 fps | 97.4% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 42,612 psi | 86% | 2694 fps | 97.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 42,192 psi | 86% | 2595 fps | 98.7% |
| Alliant Reloder-15 | <<locked>> | 82% | 42,554 psi | 86% | 2605 fps | 97.6% |
| Alliant Reloder-16 | <<locked>> | 94% | 44,019 psi | 89% | 2697 fps | 97.4% |
| Alliant Reloder-17 | <<locked>> | 90% | 44,237 psi | 90% | 2733 fps | 98.9% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 38,159 psi | 77% | 2602 fps | 97.3% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 42,163 psi | 86% | 2740 fps | 96% |
| Bofors RP3 | <<locked>> | 84% | 42,293 psi | 86% | 2605 fps | 98.8% |
| Hodgdon H380 | <<locked>> | 84% | 42,873 psi | 87% | 2602 fps | 96.3% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 43,236 psi | 88% | 2641 fps | 98.6% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 43,018 psi | 87% | 2651 fps | 99% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,592 psi | 72% | 1696 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 44,527 psi | 90% | 2602 fps | 98% |
| IMR 4831 | <<locked>> | 94% | 43,018 psi | 87% | 2648 fps | 97.1% |
| IMR 4895 | <<locked>> | 82% | 43,569 psi | 88% | 2635 fps | 98.3% |
| Lovex S062 | <<locked>> | 82% | 42,163 psi | 86% | 2562 fps | 99% |
| Lovex S065 | <<locked>> | 90% | 44,034 psi | 89% | 2595 fps | 95.7% |
| Norma 203B | <<locked>> | 84% | 44,614 psi | 90% | 2644 fps | 98.5% |
| Norma URP | <<locked>> | 94% | 44,556 psi | 90% | 2690 fps | 97.2% |
| Ramshot Big Game | <<locked>> | 84% | 43,918 psi | 89% | 2657 fps | 98.2% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,056 psi | 73% | 1736 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 44,338 psi | 90% | 2703 fps | 98% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 44,150 psi | 90% | 2743 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 44,469 psi | 90% | 2717 fps | 97% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 44,425 psi | 90% | 2720 fps | 96.1% |
| Rottweil R 902 | <<locked>> | 82% | 44,367 psi | 90% | 2582 fps | 99.3% |
| Rottweil R 903 | <<locked>> | 86% | 42,424 psi | 86% | 2602 fps | 98.6% |
| Shooters World Long Rifle | <<locked>> | 90% | 44,034 psi | 89% | 2595 fps | 95.7% |
| Shooters World Precision | <<locked>> | 82% | 42,163 psi | 86% | 2562 fps | 99% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 42,931 psi | 87% | 2644 fps | 98.1% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 44,556 psi | 90% | 2533 fps | 100% |
| Somchem S355 | <<locked>> | 86% | 42,917 psi | 87% | 2598 fps | 98.5% |
| Somchem S365 | <<locked>> | 96% | 42,612 psi | 86% | 2700 fps | 99.5% |
| Vihtavuori N135 | <<locked>> | 82% | 43,482 psi | 88% | 2562 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 43,947 psi | 89% | 2569 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 43,410 psi | 88% | 2582 fps | 99.5% |
| Vihtavuori N160 | <<locked>> | 92% | 43,714 psi | 89% | 2635 fps | 96.9% |
| Vihtavuori N540 | <<locked>> | 82% | 42,467 psi | 86% | 2559 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 92% | 43,236 psi | 88% | 2644 fps | 96.6% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 41,147 psi | 83% | 2677 fps | 97.3% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 43,903 psi | 89% | 2618 fps | 98.8% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 34,418 psi | 70% | 2582 fps | 96.3% |
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% | 42,032 psi | 85% | 2536 fps | 100% |
| Accurate 4064 | <<locked>> | 80% | 39,697 psi | 81% | 2526 fps | 99.9% |
| Accurate 4350 | <<locked>> | 88% | 37,246 psi | 76% | 2546 fps | 95.3% |
| ADI AR 2208 | <<locked>> | 80% | 37,681 psi | 76% | 2467 fps | 96% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 40,059 psi | 81% | 2635 fps | 96.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 37,420 psi | 76% | 2493 fps | 97.7% |
| Alliant Reloder-15 | <<locked>> | 80% | 40,016 psi | 81% | 2552 fps | 96.9% |
| Alliant Reloder-16 | 41.3 gr | 88% | 37,101 psi | 75% | 2543 fps | 95.1% |
| Alliant Reloder-17 | 40.4 gr | 80% | 32,445 psi | 66% | 2454 fps | 95.1% |
| Alliant Reloder-23 | <<locked>> | 96% | 34,084 psi | 69% | 2500 fps | 95.7% |
| Alliant Reloder-26 | <<locked>> | 98% | 39,624 psi | 80% | 2684 fps | 95% |
| Bofors RP3 | <<locked>> | 80% | 37,507 psi | 76% | 2507 fps | 97.8% |
| Hodgdon H380 | <<locked>> | 82% | 40,553 psi | 82% | 2552 fps | 95.7% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 32,474 psi | 66% | 2402 fps | 95.3% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 40,379 psi | 82% | 2598 fps | 98.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,774 psi | 54% | 1519 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 39,566 psi | 80% | 2500 fps | 96.9% |
| IMR 4831 | <<locked>> | 90% | 38,116 psi | 77% | 2549 fps | 95.7% |
| IMR 4895 | <<locked>> | 80% | 40,886 psi | 83% | 2582 fps | 97.8% |
| Lovex S062 | <<locked>> | 80% | 39,885 psi | 81% | 2513 fps | 98.6% |
| Lovex S065 | <<locked>> | 88% | 41,698 psi | 85% | 2549 fps | 95% |
| Norma 203B | <<locked>> | 80% | 39,421 psi | 80% | 2543 fps | 97.3% |
| Norma URP | <<locked>> | 88% | 37,101 psi | 75% | 2536 fps | 95% |
| Ramshot Big Game | <<locked>> | 80% | 38,769 psi | 79% | 2552 fps | 96.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,021 psi | 55% | 1552 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 41,495 psi | 84% | 2648 fps | 97.3% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 34,330 psi | 70% | 2516 fps | 98.5% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 39,001 psi | 79% | 2605 fps | 95.4% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 41,771 psi | 85% | 2664 fps | 95.2% |
| Rottweil R 902 | <<locked>> | 80% | 41,916 psi | 85% | 2533 fps | 98.9% |
| Rottweil R 903 | <<locked>> | 80% | 35,302 psi | 72% | 2451 fps | 96.9% |
| Shooters World Long Rifle | <<locked>> | 88% | 41,698 psi | 85% | 2549 fps | 95% |
| Shooters World Precision | <<locked>> | 80% | 39,885 psi | 81% | 2513 fps | 98.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 35,665 psi | 72% | 2487 fps | 96% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 37,217 psi | 75% | 2398 fps | 99.9% |
| Somchem S355 | <<locked>> | 80% | 36,100 psi | 73% | 2457 fps | 96.9% |
| Somchem S365 | 40.2 gr | 84% | 29,849 psi | 61% | 2388 fps | 95.8% |
| Vihtavuori N135 | <<locked>> | 80% | 40,727 psi | 83% | 2516 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 41,234 psi | 84% | 2520 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 34,156 psi | 69% | 2392 fps | 97.7% |
| Vihtavuori N160 | <<locked>> | 88% | 38,769 psi | 79% | 2536 fps | 95.5% |
| Vihtavuori N540 | <<locked>> | 80% | 39,943 psi | 81% | 2513 fps | 99.8% |
| Vihtavuori N550 | <<locked>> | 88% | 38,218 psi | 78% | 2539 fps | 95.1% |
| Vihtavuori N555 | <<locked>> | 94% | 34,534 psi | 70% | 2526 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 32,343 psi | 66% | 2359 fps | 95.3% |
| Winchester StaBALL HD | <<locked>> | 98% | 32,663 psi | 66% | 2526 fps | 95.2% |
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 46 powders for 7 x 57 R loaded with the .284 | 140gr | Barnes X BT. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,743 fps; across all powders the maximum-charge window runs from 1,696 fps to 2,743 fps. Alliant Reloder-23 gives the best case fill at 100 %, and 46 of the 46 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, Alliant Reloder-26, Hodgdon TrailBoss 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 BT 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.