Load Specifications
Load data in caliber 7 x 57 R with .284 | 175gr | Woodleigh PP SN bullet and 49 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, ReloadSwiss RS 70 and Alliant Reloder-16.
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% | 44,599 psi | 90% | 2425 fps | 98.1% |
| Accurate 4350 | <<locked>> | 90% | 44,034 psi | 89% | 2428 fps | 99.2% |
| ADI AR 2208 | <<locked>> | 82% | 43,366 psi | 88% | 2339 fps | 99.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 43,337 psi | 88% | 2362 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 90% | 43,018 psi | 87% | 2438 fps | 99.4% |
| Alliant Reloder-17 | <<locked>> | 86% | 42,946 psi | 87% | 2457 fps | 99.9% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 42,148 psi | 85% | 2448 fps | 99.9% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 37,159 psi | 75% | 2362 fps | 96.7% |
| Alliant Reloder-26 | <<locked>> | 98% | 44,135 psi | 90% | 2552 fps | 99.3% |
| Bofors RP3 | <<locked>> | 82% | 43,105 psi | 87% | 2369 fps | 100% |
| Bofors RP7 | <<locked>> | 86% | 43,845 psi | 89% | 2349 fps | 96.4% |
| Hodgdon H380 | <<locked>> | 82% | 44,034 psi | 89% | 2379 fps | 98.9% |
| Hodgdon H414 | <<locked>> | 88% | 43,801 psi | 89% | 2428 fps | 97.1% |
| Hodgdon H4350 | <<locked>> | 86% | 44,541 psi | 90% | 2395 fps | 95.8% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 42,424 psi | 86% | 2379 fps | 99.9% |
| Hodgdon Superformance | <<locked>> | 88% | 43,076 psi | 87% | 2441 fps | 96.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,926 psi | 73% | 1522 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 44,048 psi | 89% | 2375 fps | 96.4% |
| IMR 4451 Enduron | <<locked>> | 84% | 42,714 psi | 87% | 2329 fps | 96.5% |
| IMR 4831 | <<locked>> | 90% | 42,090 psi | 85% | 2382 fps | 99% |
| Lovex S065 | <<locked>> | 86% | 42,279 psi | 86% | 2326 fps | 97.9% |
| Lovex S070 | <<locked>> | 88% | 42,859 psi | 87% | 2356 fps | 97% |
| Lovex S071ᴾ | <<locked>> | 100% | 37,072 psi | 75% | 2293 fps | 96.2% |
| Norma MRP | <<locked>> | 98% | 43,976 psi | 89% | 2510 fps | 97% |
| Norma URP | <<locked>> | 90% | 43,642 psi | 89% | 2421 fps | 99.1% |
| Ramshot Hunter | <<locked>> | 90% | 42,554 psi | 86% | 2415 fps | 97.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,463 psi | 74% | 1558 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 44,208 psi | 90% | 2362 fps | 97.6% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 42,728 psi | 87% | 2454 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 43,816 psi | 89% | 2451 fps | 99.1% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 43,120 psi | 87% | 2464 fps | 98.7% |
| Rottweil R 903 | <<locked>> | 84% | 43,279 psi | 88% | 2365 fps | 99.9% |
| Rottweil R 907 | <<locked>> | 86% | 43,845 psi | 89% | 2349 fps | 96.4% |
| Shooters World Long Rifle | <<locked>> | 86% | 42,279 psi | 86% | 2326 fps | 97.9% |
| Shooters World SW4350 | <<locked>> | 88% | 42,859 psi | 87% | 2356 fps | 97% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 44,599 psi | 90% | 2418 fps | 99.8% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 42,830 psi | 87% | 2251 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 41,756 psi | 85% | 2280 fps | 96.4% |
| Somchem S355 | <<locked>> | 84% | 43,947 psi | 89% | 2365 fps | 99.9% |
| Somchem S365 | <<locked>> | 92% | 41,916 psi | 85% | 2428 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 44,614 psi | 90% | 2421 fps | 96.6% |
| Vihtavuori N150 | <<locked>> | 84% | 41,887 psi | 85% | 2303 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 42,931 psi | 87% | 2375 fps | 98.9% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 43,772 psi | 89% | 2395 fps | 95.8% |
| Vihtavuori N550 | <<locked>> | 88% | 42,163 psi | 86% | 2379 fps | 98.7% |
| Vihtavuori N555 | <<locked>> | 98% | 43,845 psi | 89% | 2470 fps | 99.6% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 42,235 psi | 86% | 2349 fps | 99.9% |
| Winchester 760 | <<locked>> | 88% | 43,801 psi | 89% | 2428 fps | 97.1% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 37,753 psi | 77% | 2474 fps | 100% |
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>> | 92% | 34,055 psi | 69% | 2234 fps | 95.2% |
| Accurate 4350 | <<locked>> | 80% | 31,386 psi | 64% | 2182 fps | 96.2% |
| ADI AR 2208 | <<locked>> | 80% | 40,872 psi | 83% | 2297 fps | 99% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 40,495 psi | 82% | 2313 fps | 99.8% |
| Alliant Reloder-16 | 37 gr | 80% | 31,604 psi | 64% | 2195 fps | 96.3% |
| Alliant Reloder-17 | <<locked>> | 80% | 35,085 psi | 71% | 2300 fps | 99% |
| Alliant Reloder-23 | <<locked>> | 84% | 25,875 psi | 52% | 2070 fps | 95.1% |
| Alliant Reloder-25 | <<locked>> | 98% | 35,070 psi | 71% | 2316 fps | 95.8% |
| Alliant Reloder-26 | 44.9 gr | 88% | 31,241 psi | 63% | 2270 fps | 95.2% |
| Bofors RP3 | <<locked>> | 80% | 40,524 psi | 82% | 2323 fps | 99.8% |
| Bofors RP7 | <<locked>> | 84% | 41,046 psi | 83% | 2297 fps | 95.6% |
| Hodgdon H380 | <<locked>> | 80% | 41,133 psi | 83% | 2326 fps | 98.4% |
| Hodgdon H414 | <<locked>> | 84% | 38,247 psi | 78% | 2323 fps | 95.5% |
| Hodgdon H4350 | <<locked>> | 84% | 41,684 psi | 85% | 2343 fps | 95% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 28,993 psi | 59% | 2103 fps | 97% |
| Hodgdon Superformance | <<locked>> | 86% | 40,030 psi | 81% | 2382 fps | 95.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,803 psi | 54% | 1358 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 41,234 psi | 84% | 2323 fps | 95.7% |
| IMR 4451 Enduron | <<locked>> | 80% | 37,695 psi | 76% | 2231 fps | 95% |
| IMR 4831 | <<locked>> | 80% | 30,414 psi | 62% | 2146 fps | 95.8% |
| Lovex S065 | <<locked>> | 80% | 35,128 psi | 71% | 2188 fps | 95.9% |
| Lovex S070 | <<locked>> | 84% | 37,840 psi | 77% | 2260 fps | 95.5% |
| Lovex S071 | <<locked>> | 98% | 34,795 psi | 71% | 2247 fps | 95.5% |
| Norma MRP | <<locked>> | 94% | 38,450 psi | 78% | 2398 fps | 95.2% |
| Norma URP | <<locked>> | 80% | 31,749 psi | 64% | 2185 fps | 96.1% |
| Ramshot Hunter | <<locked>> | 84% | 35,157 psi | 71% | 2267 fps | 95.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,093 psi | 55% | 1388 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 41,423 psi | 84% | 2313 fps | 97% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 37,333 psi | 76% | 2356 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 31,053 psi | 63% | 2195 fps | 95.6% |
| ReloadSwiss RS 70 | 41.5 gr | 82% | 33,127 psi | 67% | 2251 fps | 95.5% |
| Rottweil R 903 | <<locked>> | 80% | 38,218 psi | 78% | 2277 fps | 99.5% |
| Rottweil R 907 | <<locked>> | 84% | 41,046 psi | 83% | 2297 fps | 95.6% |
| Shooters World Long Rifle | <<locked>> | 80% | 35,128 psi | 71% | 2188 fps | 95.9% |
| Shooters World SW4350 | <<locked>> | 84% | 37,840 psi | 77% | 2260 fps | 95.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 39,001 psi | 79% | 2320 fps | 99.2% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 40,234 psi | 82% | 2208 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 39,044 psi | 79% | 2231 fps | 95.7% |
| Somchem S355 | <<locked>> | 80% | 38,696 psi | 78% | 2274 fps | 99.4% |
| Somchem S365 | <<locked>> | 80% | 28,456 psi | 58% | 2142 fps | 98.2% |
| Somchem S385 | <<locked>> | 94% | 41,655 psi | 84% | 2369 fps | 95.8% |
| Vihtavuori N150 | <<locked>> | 80% | 37,028 psi | 75% | 2221 fps | 99.8% |
| Vihtavuori N160 | <<locked>> | 80% | 33,054 psi | 67% | 2185 fps | 96.5% |
| Vihtavuori N165 | <<locked>> | 98% | 40,930 psi | 83% | 2343 fps | 95% |
| Vihtavuori N550 | <<locked>> | 80% | 32,503 psi | 66% | 2185 fps | 96.1% |
| Vihtavuori N555 | <<locked>> | 84% | 27,804 psi | 56% | 2136 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 32,634 psi | 66% | 2165 fps | 98.4% |
| Winchester 760 | <<locked>> | 84% | 38,247 psi | 78% | 2323 fps | 95.5% |
| Winchester StaBALL HD | <<locked>> | 88% | 25,759 psi | 52% | 2133 fps | 95.4% |
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 49 powders for 7 x 57 R loaded with the .284 | 175gr | Woodleigh PP SN. Alliant Reloder-26 delivers the highest muzzle velocity at 2,552 fps; across all powders the maximum-charge window runs from 1,522 fps to 2,552 fps. Accurate 3100 gives the best case fill at 100 %, and 49 of the 49 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (340 MPa), the top charges use 73–90 %, leaving at least 10 % headroom. The 175.0 gr projectile in 0.284" calls for a 1:11.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, Alliant Reloder-23, Alliant Reloder-25 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, ReloadSwiss RS 70, Alliant Reloder-16 rank at the top here: for 7 x 57 R with the .284 | 175gr | 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.