Load Specifications
Load data in caliber 7 x 57 R with .284 | 175gr | Speer Deep Curl Soft Point bullet and 48 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 3100 | <<locked>> | 98% | 42,134 psi | 85% | 2388 fps | 97.7% |
| Accurate 4350 | <<locked>> | 88% | 41,698 psi | 85% | 2392 fps | 99% |
| ADI AR 2208 | <<locked>> | 82% | 43,772 psi | 89% | 2349 fps | 99.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 43,758 psi | 89% | 2372 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 43,337 psi | 88% | 2448 fps | 99.4% |
| Alliant Reloder-17 | <<locked>> | 86% | 43,598 psi | 88% | 2470 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 42,656 psi | 87% | 2461 fps | 99.9% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 37,594 psi | 76% | 2375 fps | 97% |
| Alliant Reloder-26 | <<locked>> | 96% | 41,713 psi | 85% | 2510 fps | 98.9% |
| Bofors RP3 | <<locked>> | 82% | 43,816 psi | 89% | 2382 fps | 100% |
| Bofors RP7 | <<locked>> | 86% | 44,222 psi | 90% | 2359 fps | 96.5% |
| Hodgdon H380 | <<locked>> | 82% | 44,425 psi | 90% | 2388 fps | 99% |
| Hodgdon H414 | <<locked>> | 88% | 44,150 psi | 90% | 2438 fps | 97.3% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 43,091 psi | 87% | 2392 fps | 99.9% |
| Hodgdon Superformance | <<locked>> | 88% | 43,613 psi | 88% | 2457 fps | 96.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,071 psi | 73% | 1529 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 44,353 psi | 90% | 2385 fps | 96.6% |
| IMR 4451 Enduron | <<locked>> | 84% | 43,033 psi | 87% | 2339 fps | 96.7% |
| IMR 4831 | <<locked>> | 90% | 42,757 psi | 87% | 2395 fps | 99.1% |
| Lovex S065 | <<locked>> | 86% | 42,627 psi | 86% | 2336 fps | 98% |
| Lovex S070 | <<locked>> | 88% | 43,236 psi | 88% | 2365 fps | 97.1% |
| Lovex S071ᴾ | <<locked>> | 100% | 37,652 psi | 76% | 2310 fps | 96.5% |
| Norma MRP | <<locked>> | 98% | 44,512 psi | 90% | 2523 fps | 97.2% |
| Norma URP | <<locked>> | 90% | 44,324 psi | 90% | 2434 fps | 99.3% |
| Ramshot Hunter | <<locked>> | 90% | 43,105 psi | 87% | 2428 fps | 97.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,593 psi | 74% | 1565 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 44,541 psi | 90% | 2372 fps | 97.8% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 43,381 psi | 88% | 2470 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 44,179 psi | 90% | 2461 fps | 99.1% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 43,685 psi | 89% | 2480 fps | 98.9% |
| Rottweil R 903 | <<locked>> | 84% | 43,729 psi | 89% | 2375 fps | 99.9% |
| Rottweil R 907 | <<locked>> | 86% | 44,222 psi | 90% | 2359 fps | 96.5% |
| Shooters World Long Rifle | <<locked>> | 86% | 42,627 psi | 86% | 2336 fps | 98% |
| Shooters World SW4350 | <<locked>> | 88% | 43,236 psi | 88% | 2365 fps | 97.1% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 42,119 psi | 85% | 2379 fps | 99.6% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 43,265 psi | 88% | 2260 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 42,090 psi | 85% | 2290 fps | 96.6% |
| Somchem S355 | <<locked>> | 84% | 44,396 psi | 90% | 2375 fps | 99.9% |
| Somchem S365 | <<locked>> | 92% | 42,569 psi | 86% | 2441 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 42,250 psi | 86% | 2385 fps | 96% |
| Vihtavuori N150 | <<locked>> | 84% | 42,308 psi | 86% | 2316 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 43,308 psi | 88% | 2385 fps | 99% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 44,295 psi | 90% | 2408 fps | 96.1% |
| Vihtavuori N550 | <<locked>> | 88% | 42,511 psi | 86% | 2388 fps | 98.8% |
| Vihtavuori N555 | <<locked>> | 98% | 44,527 psi | 90% | 2484 fps | 99.7% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 42,772 psi | 87% | 2362 fps | 99.9% |
| Winchester 760 | <<locked>> | 88% | 44,150 psi | 90% | 2438 fps | 97.3% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 38,232 psi | 78% | 2490 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% | 34,389 psi | 70% | 2244 fps | 95.4% |
| Accurate 4350 | <<locked>> | 80% | 31,792 psi | 64% | 2195 fps | 96.4% |
| ADI AR 2208 | <<locked>> | 80% | 40,973 psi | 83% | 2300 fps | 99.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 40,944 psi | 83% | 2323 fps | 99.8% |
| Alliant Reloder-16 | 37.4 gr | 80% | 31,966 psi | 65% | 2205 fps | 96.5% |
| Alliant Reloder-17 | <<locked>> | 80% | 35,447 psi | 72% | 2313 fps | 99.1% |
| Alliant Reloder-23 | <<locked>> | 84% | 26,121 psi | 53% | 2080 fps | 95.3% |
| Alliant Reloder-25 | <<locked>> | 96% | 33,315 psi | 68% | 2274 fps | 95.1% |
| Alliant Reloder-26 | 45.4 gr | 88% | 31,705 psi | 64% | 2287 fps | 95.6% |
| Bofors RP3 | <<locked>> | 80% | 40,944 psi | 83% | 2333 fps | 99.9% |
| Bofors RP7 | <<locked>> | 82% | 39,015 psi | 79% | 2264 fps | 95% |
| Hodgdon H380 | <<locked>> | 80% | 41,568 psi | 84% | 2339 fps | 98.5% |
| Hodgdon H414 | <<locked>> | 84% | 38,595 psi | 78% | 2333 fps | 95.7% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 29,327 psi | 59% | 2113 fps | 97.2% |
| Hodgdon Superformance | <<locked>> | 86% | 40,567 psi | 82% | 2398 fps | 95.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,745 psi | 54% | 1358 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 39,204 psi | 80% | 2290 fps | 95.1% |
| IMR 4451 Enduron | <<locked>> | 80% | 38,058 psi | 77% | 2244 fps | 95.2% |
| IMR 4831 | <<locked>> | 80% | 30,792 psi | 62% | 2156 fps | 96% |
| Lovex S065 | <<locked>> | 80% | 35,505 psi | 72% | 2198 fps | 96.1% |
| Lovex S070 | <<locked>> | 82% | 35,984 psi | 73% | 2228 fps | 95% |
| Lovex S071 | <<locked>> | 98% | 35,099 psi | 71% | 2257 fps | 95.6% |
| Norma MRP | <<locked>> | 94% | 38,957 psi | 79% | 2415 fps | 95.5% |
| Norma URP | <<locked>> | 80% | 31,894 psi | 65% | 2192 fps | 96.2% |
| Ramshot Hunter | <<locked>> | 84% | 35,462 psi | 72% | 2277 fps | 95.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,311 psi | 55% | 1394 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 41,771 psi | 85% | 2323 fps | 97.1% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 37,695 psi | 76% | 2365 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 31,386 psi | 64% | 2208 fps | 95.8% |
| ReloadSwiss RS 70 | <<locked>> | 82% | 33,417 psi | 68% | 2260 fps | 95.7% |
| Rottweil R 903 | <<locked>> | 80% | 38,392 psi | 78% | 2280 fps | 99.5% |
| Rottweil R 907 | <<locked>> | 82% | 39,015 psi | 79% | 2264 fps | 95% |
| Shooters World Long Rifle | <<locked>> | 80% | 35,505 psi | 72% | 2198 fps | 96.1% |
| Shooters World SW4350 | <<locked>> | 82% | 35,984 psi | 73% | 2228 fps | 95% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 39,378 psi | 80% | 2329 fps | 99.3% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 40,683 psi | 83% | 2218 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 37,043 psi | 75% | 2195 fps | 95.1% |
| Somchem S355 | <<locked>> | 80% | 39,102 psi | 79% | 2283 fps | 99.5% |
| Somchem S365 | 38.2 gr | 80% | 28,805 psi | 58% | 2156 fps | 98.4% |
| Somchem S385 | <<locked>> | 92% | 39,508 psi | 80% | 2333 fps | 95.2% |
| Vihtavuori N150 | <<locked>> | 80% | 37,188 psi | 75% | 2224 fps | 99.8% |
| Vihtavuori N160 | <<locked>> | 80% | 33,431 psi | 68% | 2195 fps | 96.7% |
| Vihtavuori N165 | <<locked>> | 98% | 41,394 psi | 84% | 2356 fps | 95.2% |
| Vihtavuori N550 | <<locked>> | 80% | 32,837 psi | 67% | 2195 fps | 96.3% |
| Vihtavuori N555 | <<locked>> | 84% | 28,166 psi | 57% | 2149 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 32,895 psi | 67% | 2172 fps | 98.5% |
| Winchester 760 | <<locked>> | 84% | 38,841 psi | 79% | 2339 fps | 95.8% |
| Winchester StaBALL HD | <<locked>> | 88% | 26,121 psi | 53% | 2152 fps | 95.9% |
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 48 powders for 7 x 57 R loaded with the .284 | 175gr | Speer Deep Curl Soft Point. Norma MRP delivers the highest muzzle velocity at 2,523 fps; across all powders the maximum-charge window runs from 1,529 fps to 2,523 fps. Alliant Reloder-23 gives the best case fill at 100 %, and 48 of the 48 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. 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. Alliant Reloder-26, Alliant Reloder-16, Somchem S365 rank at the top here: for 7 x 57 R with the .284 | 175gr | Speer Deep Curl Soft Point 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.