Load Specifications
Load data in caliber 7 x 57 R with .284 | 160gr | Woodleigh PP SN bullet and 47 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, Alliant Reloder-16 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 3100ᴾ | <<locked>> | 100% | 41,887 psi | 85% | 2490 fps | 96.6% |
| Accurate 4064 | <<locked>> | 82% | 42,656 psi | 87% | 2444 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 44,498 psi | 90% | 2552 fps | 98.8% |
| ADI AR 2208 | <<locked>> | 84% | 44,135 psi | 90% | 2467 fps | 99% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 44,599 psi | 90% | 2598 fps | 99.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 43,845 psi | 89% | 2487 fps | 99.8% |
| Alliant Reloder-15 | <<locked>> | 82% | 44,208 psi | 90% | 2500 fps | 99.1% |
| Alliant Reloder-16 | <<locked>> | 92% | 43,497 psi | 88% | 2559 fps | 98.9% |
| Alliant Reloder-17 | <<locked>> | 88% | 43,540 psi | 88% | 2582 fps | 99.7% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 39,900 psi | 81% | 2516 fps | 99.3% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 44,556 psi | 90% | 2671 fps | 98.7% |
| Bofors RP3 | <<locked>> | 84% | 43,758 psi | 89% | 2493 fps | 99.8% |
| Hodgdon H380 | <<locked>> | 82% | 41,872 psi | 85% | 2451 fps | 97.8% |
| Hodgdon H414 | <<locked>> | 90% | 44,019 psi | 89% | 2543 fps | 96.2% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 43,047 psi | 87% | 2503 fps | 99.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,650 psi | 72% | 1598 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 43,453 psi | 88% | 2448 fps | 99.1% |
| IMR 4451 Enduron | <<locked>> | 86% | 43,526 psi | 88% | 2451 fps | 95.8% |
| IMR 4831 | <<locked>> | 92% | 42,554 psi | 86% | 2503 fps | 98.5% |
| Lovex S062 | <<locked>> | 82% | 43,439 psi | 88% | 2451 fps | 99.9% |
| Lovex S065 | <<locked>> | 88% | 42,946 psi | 87% | 2448 fps | 97.2% |
| Lovex S070 | <<locked>> | 90% | 43,366 psi | 88% | 2474 fps | 96.2% |
| Norma 203B | <<locked>> | 82% | 43,526 psi | 88% | 2487 fps | 99.4% |
| Norma URP | <<locked>> | 92% | 44,251 psi | 90% | 2546 fps | 98.6% |
| Ramshot Big Game | <<locked>> | 82% | 43,221 psi | 88% | 2503 fps | 99.2% |
| Ramshot Hunter | <<locked>> | 92% | 42,989 psi | 87% | 2533 fps | 96.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,114 psi | 73% | 1637 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 42,134 psi | 85% | 2434 fps | 96.2% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 43,439 psi | 88% | 2585 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 44,019 psi | 89% | 2569 fps | 98.5% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 43,830 psi | 89% | 2585 fps | 98% |
| Rottweil R 903 | <<locked>> | 86% | 43,903 psi | 89% | 2490 fps | 99.7% |
| Shooters World Long Rifle | <<locked>> | 88% | 42,946 psi | 87% | 2448 fps | 97.2% |
| Shooters World Precision | <<locked>> | 82% | 43,439 psi | 88% | 2451 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 90% | 43,366 psi | 88% | 2474 fps | 96.2% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 42,221 psi | 86% | 2493 fps | 99.1% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 43,729 psi | 89% | 2379 fps | 100% |
| Somchem S355 | <<locked>> | 86% | 44,440 psi | 90% | 2490 fps | 99.7% |
| Somchem S365 | <<locked>> | 94% | 42,250 psi | 86% | 2552 fps | 100% |
| Vihtavuori N150 | <<locked>> | 86% | 42,598 psi | 86% | 2431 fps | 99.9% |
| Vihtavuori N160 | <<locked>> | 90% | 43,323 psi | 88% | 2497 fps | 98.4% |
| Vihtavuori N540 | <<locked>> | 82% | 44,019 psi | 89% | 2444 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 42,424 psi | 86% | 2493 fps | 98% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 43,801 psi | 89% | 2589 fps | 99.2% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 43,033 psi | 87% | 2474 fps | 99.7% |
| Winchester 760 | <<locked>> | 90% | 44,338 psi | 90% | 2549 fps | 96.3% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 35,810 psi | 73% | 2526 fps | 99.3% |
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 3100 | <<locked>> | 98% | 39,030 psi | 79% | 2438 fps | 95.8% |
| Accurate 4064 | <<locked>> | 80% | 40,161 psi | 81% | 2402 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 31,502 psi | 64% | 2287 fps | 95.1% |
| ADI AR 2208 | <<locked>> | 80% | 38,957 psi | 79% | 2369 fps | 98% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 41,771 psi | 85% | 2543 fps | 98.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 38,667 psi | 78% | 2388 fps | 99.2% |
| Alliant Reloder-15 | <<locked>> | 80% | 41,379 psi | 84% | 2448 fps | 98.7% |
| Alliant Reloder-16 | 38.9 gr | 82% | 32,082 psi | 65% | 2303 fps | 95.3% |
| Alliant Reloder-17 | <<locked>> | 80% | 33,272 psi | 67% | 2362 fps | 97.6% |
| Alliant Reloder-23 | <<locked>> | 90% | 29,327 psi | 59% | 2264 fps | 95.8% |
| Alliant Reloder-26 | 48.1 gr | 92% | 33,707 psi | 68% | 2431 fps | 95% |
| Bofors RP3 | <<locked>> | 80% | 38,479 psi | 78% | 2398 fps | 99.2% |
| Hodgdon H380 | <<locked>> | 80% | 39,204 psi | 80% | 2398 fps | 97.1% |
| Hodgdon H414 | <<locked>> | 88% | 41,220 psi | 84% | 2490 fps | 95.4% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 27,644 psi | 56% | 2162 fps | 95.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,513 psi | 54% | 1424 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 40,930 psi | 83% | 2402 fps | 98.6% |
| IMR 4451 Enduron | <<locked>> | 84% | 40,872 psi | 83% | 2402 fps | 95% |
| IMR 4831 | <<locked>> | 84% | 32,735 psi | 66% | 2303 fps | 95.7% |
| Lovex S062 | <<locked>> | 80% | 40,959 psi | 83% | 2405 fps | 99.7% |
| Lovex S065 | <<locked>> | 82% | 35,650 psi | 72% | 2300 fps | 95% |
| Lovex S070 | <<locked>> | 88% | 40,930 psi | 83% | 2428 fps | 95.5% |
| Norma 203B | <<locked>> | 80% | 40,756 psi | 83% | 2438 fps | 99% |
| Norma URP | <<locked>> | 82% | 32,024 psi | 65% | 2293 fps | 95.1% |
| Ramshot Big Game | <<locked>> | 80% | 40,451 psi | 82% | 2454 fps | 98.8% |
| Ramshot Hunter | <<locked>> | 88% | 37,826 psi | 77% | 2428 fps | 95.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,006 psi | 55% | 1463 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 39,523 psi | 80% | 2382 fps | 95.4% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 35,418 psi | 72% | 2425 fps | 99.8% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 33,431 psi | 68% | 2356 fps | 95.4% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 35,911 psi | 73% | 2415 fps | 95.4% |
| Rottweil R 903 | <<locked>> | 80% | 36,085 psi | 73% | 2343 fps | 98.6% |
| Shooters World Long Rifle | <<locked>> | 82% | 35,650 psi | 72% | 2300 fps | 95% |
| Shooters World Precision | <<locked>> | 80% | 40,959 psi | 83% | 2405 fps | 99.7% |
| Shooters World SW4350 | <<locked>> | 88% | 40,930 psi | 83% | 2428 fps | 95.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 36,999 psi | 75% | 2388 fps | 98.1% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 38,464 psi | 78% | 2290 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 36,941 psi | 75% | 2349 fps | 98.6% |
| Somchem S365 | 38.7 gr | 80% | 26,803 psi | 54% | 2195 fps | 96.5% |
| Vihtavuori N150 | <<locked>> | 80% | 35,099 psi | 71% | 2290 fps | 99.1% |
| Vihtavuori N160 | <<locked>> | 82% | 33,330 psi | 68% | 2293 fps | 95.6% |
| Vihtavuori N540 | <<locked>> | 80% | 41,263 psi | 84% | 2398 fps | 100% |
| Vihtavuori N550 | <<locked>> | 82% | 32,895 psi | 67% | 2297 fps | 95.2% |
| Vihtavuori N555 | <<locked>> | 88% | 29,689 psi | 60% | 2287 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 31,053 psi | 63% | 2224 fps | 97% |
| Winchester 760 | <<locked>> | 88% | 41,524 psi | 84% | 2497 fps | 95.5% |
| Winchester StaBALL HD | <<locked>> | 92% | 27,630 psi | 56% | 2280 fps | 95.1% |
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 47 powders for 7 x 57 R loaded with the .284 | 160gr | Woodleigh PP SN. Alliant Reloder-26 delivers the highest muzzle velocity at 2,671 fps; across all powders the maximum-charge window runs from 1,598 fps to 2,671 fps. Accurate 3100 gives the best case fill at 100 %, and 47 of the 47 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 160.0 gr projectile in 0.284" calls for a 1:12.0 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. Alliant Reloder-26, Alliant Reloder-16, Somchem S365 rank at the top here: for 7 x 57 R with the .284 | 160gr | Woodleigh PP SN 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.