Load Specifications
Load data in caliber 7 x 57 R with .284 | 177gr | RWS ID Classic bullet and 44 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Norma MRP, Alliant Reloder-26 and ReloadSwiss RS 70.
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 3100 | <<locked>> | 98% | 43,642 psi | 89% | 2408 fps | 98.2% |
| Accurate 4350 | <<locked>> | 88% | 43,018 psi | 87% | 2408 fps | 99.3% |
| Alliant Reloder-16 | <<locked>> | 90% | 44,527 psi | 90% | 2461 fps | 99.7% |
| Alliant Reloder-17 | <<locked>> | 84% | 41,669 psi | 85% | 2431 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 44,063 psi | 89% | 2477 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 38,740 psi | 79% | 2398 fps | 97.7% |
| Alliant Reloder-26 | <<locked>> | 96% | 43,033 psi | 87% | 2530 fps | 99.3% |
| Bofors RP7 | <<locked>> | 84% | 42,511 psi | 86% | 2323 fps | 96.4% |
| Hodgdon H414 | <<locked>> | 86% | 42,453 psi | 86% | 2402 fps | 97.1% |
| Hodgdon H4350 | <<locked>> | 84% | 43,192 psi | 88% | 2369 fps | 95.8% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 44,353 psi | 90% | 2405 fps | 100% |
| Hodgdon Superformance | <<locked>> | 86% | 41,829 psi | 85% | 2418 fps | 96.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,984 psi | 73% | 1526 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 42,917 psi | 87% | 2356 fps | 96.5% |
| IMR 4451 Enduron | <<locked>> | 84% | 44,150 psi | 90% | 2352 fps | 97.2% |
| IMR 4831 | <<locked>> | 90% | 43,990 psi | 89% | 2408 fps | 99.4% |
| Lovex S065 | <<locked>> | 86% | 43,801 psi | 89% | 2352 fps | 98.4% |
| Lovex S070 | <<locked>> | 88% | 44,353 psi | 90% | 2382 fps | 97.7% |
| Lovex S071ᴾ | <<locked>> | 100% | 38,798 psi | 79% | 2323 fps | 97.1% |
| Norma MRP | <<locked>> | 96% | 42,960 psi | 87% | 2490 fps | 97.1% |
| Norma URP | <<locked>> | 88% | 42,627 psi | 86% | 2402 fps | 99.2% |
| Ramshot Hunter | <<locked>> | 90% | 44,280 psi | 90% | 2444 fps | 98.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,521 psi | 74% | 1562 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 44,324 psi | 90% | 2477 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 42,540 psi | 86% | 2425 fps | 99.1% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 41,930 psi | 85% | 2441 fps | 98.7% |
| Rottweil R 903 | <<locked>> | 82% | 42,148 psi | 85% | 2343 fps | 99.9% |
| Rottweil R 907 | <<locked>> | 84% | 42,511 psi | 86% | 2323 fps | 96.4% |
| Shooters World Long Rifle | <<locked>> | 86% | 43,801 psi | 89% | 2352 fps | 98.4% |
| Shooters World SW4350 | <<locked>> | 88% | 44,353 psi | 90% | 2382 fps | 97.7% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 43,352 psi | 88% | 2392 fps | 99.8% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 44,193 psi | 90% | 2267 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 43,178 psi | 88% | 2303 fps | 97.1% |
| Somchem S355 | <<locked>> | 82% | 42,757 psi | 87% | 2343 fps | 99.9% |
| Somchem S365 | <<locked>> | 92% | 43,903 psi | 89% | 2454 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 43,395 psi | 88% | 2398 fps | 96.6% |
| Vihtavuori N150 | <<locked>> | 84% | 43,511 psi | 88% | 2326 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 44,541 psi | 90% | 2398 fps | 99.4% |
| Vihtavuori N165 | <<locked>> | 98% | 42,728 psi | 87% | 2375 fps | 96% |
| Vihtavuori N550 | <<locked>> | 88% | 43,714 psi | 89% | 2402 fps | 99.1% |
| Vihtavuori N555 | <<locked>> | 96% | 43,149 psi | 88% | 2454 fps | 99.7% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 44,034 psi | 89% | 2379 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 42,772 psi | 87% | 2408 fps | 97.2% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 39,407 psi | 80% | 2510 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>> | 90% | 33,359 psi | 68% | 2215 fps | 95.3% |
| Accurate 4350 | <<locked>> | 80% | 32,750 psi | 66% | 2208 fps | 97% |
| Alliant Reloder-16 | <<locked>> | 80% | 32,721 psi | 66% | 2221 fps | 97.1% |
| Alliant Reloder-17 | <<locked>> | 80% | 36,506 psi | 74% | 2329 fps | 99.5% |
| Alliant Reloder-23 | <<locked>> | 82% | 25,266 psi | 51% | 2051 fps | 95.2% |
| Alliant Reloder-25 | <<locked>> | 94% | 32,256 psi | 65% | 2247 fps | 95% |
| Alliant Reloder-26 | 45.1 gr | 86% | 30,545 psi | 62% | 2251 fps | 95.3% |
| Bofors RP7 | <<locked>> | 82% | 39,871 psi | 81% | 2274 fps | 95.6% |
| Hodgdon H414 | <<locked>> | 82% | 37,202 psi | 75% | 2300 fps | 95.5% |
| Hodgdon H4350 | <<locked>> | 82% | 40,509 psi | 82% | 2320 fps | 95% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 30,124 psi | 61% | 2129 fps | 97.8% |
| Hodgdon Superformance | <<locked>> | 84% | 38,928 psi | 79% | 2362 fps | 95.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,803 psi | 54% | 1358 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 37,724 psi | 77% | 2257 fps | 95% |
| IMR 4451 Enduron | <<locked>> | 80% | 38,856 psi | 79% | 2254 fps | 95.8% |
| IMR 4831 | <<locked>> | 80% | 31,647 psi | 64% | 2169 fps | 96.7% |
| Lovex S065 | <<locked>> | 80% | 36,361 psi | 74% | 2211 fps | 96.6% |
| Lovex S070 | <<locked>> | 82% | 36,825 psi | 75% | 2241 fps | 95.6% |
| Lovex S071 | <<locked>> | 96% | 34,301 psi | 70% | 2234 fps | 95.7% |
| Norma MRP | 46.8 gr | 92% | 37,695 psi | 76% | 2385 fps | 95.4% |
| Norma URP | <<locked>> | 80% | 32,996 psi | 67% | 2211 fps | 96.9% |
| Ramshot Hunter | <<locked>> | 82% | 34,185 psi | 69% | 2244 fps | 95.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,369 psi | 56% | 1394 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 38,812 psi | 79% | 2382 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 32,445 psi | 66% | 2224 fps | 96.5% |
| ReloadSwiss RS 70 | 41.5 gr | 80% | 32,010 psi | 65% | 2221 fps | 95.5% |
| Rottweil R 903 | <<locked>> | 80% | 39,682 psi | 80% | 2297 fps | 99.8% |
| Rottweil R 907 | <<locked>> | 82% | 39,871 psi | 81% | 2274 fps | 95.6% |
| Shooters World Long Rifle | <<locked>> | 80% | 36,361 psi | 74% | 2211 fps | 96.6% |
| Shooters World SW4350 | <<locked>> | 82% | 36,825 psi | 75% | 2241 fps | 95.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 40,625 psi | 82% | 2346 fps | 99.5% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 41,597 psi | 84% | 2228 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 35,694 psi | 72% | 2165 fps | 95% |
| Somchem S355 | <<locked>> | 80% | 40,045 psi | 81% | 2297 fps | 99.7% |
| Somchem S365 | <<locked>> | 80% | 29,617 psi | 60% | 2172 fps | 98.9% |
| Somchem S385 | <<locked>> | 90% | 38,058 psi | 77% | 2300 fps | 95.1% |
| Vihtavuori N150 | <<locked>> | 80% | 38,334 psi | 78% | 2241 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 34,272 psi | 70% | 2208 fps | 97.3% |
| Vihtavuori N165 | <<locked>> | 96% | 39,987 psi | 81% | 2326 fps | 95.1% |
| Vihtavuori N550 | <<locked>> | 80% | 33,678 psi | 68% | 2208 fps | 96.9% |
| Vihtavuori N555 | <<locked>> | 82% | 27,282 psi | 55% | 2119 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 33,765 psi | 68% | 2188 fps | 99% |
| Winchester 760 | <<locked>> | 82% | 37,449 psi | 76% | 2306 fps | 95.6% |
| Winchester StaBALL HD | <<locked>> | 86% | 25,237 psi | 51% | 2119 fps | 95.7% |
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 | 177gr | RWS ID Classic. Alliant Reloder-26 delivers the highest muzzle velocity at 2,530 fps; across all powders the maximum-charge window runs from 1,526 fps to 2,530 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 73–90 %, leaving at least 10 % headroom. The 177.0 gr projectile in 0.284" calls for a 1:11.5 twist; slower twists will usually not stabilise this weight. Alliant Reloder-23, Alliant Reloder-25, 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. Norma MRP, Alliant Reloder-26, ReloadSwiss RS 70 rank at the top here: for 7 x 57 R with the .284 | 177gr | RWS ID Classic 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.