Load Specifications
Load data in caliber 7 x 57 R with .284 | 175gr | Nosler Partition 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, ReloadSwiss RS 70 and ReloadSwiss RS 62.
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% | 43,700 psi | 89% | 2405 fps | 97.8% |
| Accurate 4064 | <<locked>> | 82% | 44,295 psi | 90% | 2346 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 43,279 psi | 88% | 2411 fps | 99.1% |
| ADI AR 2208 | <<locked>> | 82% | 42,699 psi | 87% | 2323 fps | 99.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 42,569 psi | 86% | 2343 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 90% | 42,380 psi | 86% | 2421 fps | 99.2% |
| Alliant Reloder-17 | <<locked>> | 86% | 42,337 psi | 86% | 2441 fps | 99.9% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 41,568 psi | 84% | 2434 fps | 99.8% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 36,492 psi | 74% | 2343 fps | 96.3% |
| Alliant Reloder-26 | <<locked>> | 98% | 43,323 psi | 88% | 2530 fps | 99.1% |
| Bofors RP3 | <<locked>> | 82% | 42,641 psi | 86% | 2356 fps | 99.9% |
| Bofors RP7 | <<locked>> | 86% | 43,207 psi | 88% | 2329 fps | 96.1% |
| Hodgdon H380 | <<locked>> | 82% | 43,294 psi | 88% | 2359 fps | 98.7% |
| Hodgdon H414 | <<locked>> | 88% | 42,830 psi | 87% | 2405 fps | 96.8% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 44,498 psi | 90% | 2408 fps | 99.9% |
| Hodgdon Superformance | <<locked>> | 88% | 42,264 psi | 86% | 2421 fps | 96% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,955 psi | 73% | 1516 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 43,424 psi | 88% | 2359 fps | 96.2% |
| IMR 4451 Enduron | <<locked>> | 86% | 44,614 psi | 90% | 2356 fps | 96.9% |
| IMR 4831 | <<locked>> | 92% | 44,353 psi | 90% | 2415 fps | 99.3% |
| Lovex S065 | <<locked>> | 88% | 44,454 psi | 90% | 2359 fps | 98.2% |
| Lovex S070 | <<locked>> | 88% | 42,235 psi | 86% | 2339 fps | 96.7% |
| Lovex S071ᴾ | <<locked>> | 100% | 36,201 psi | 73% | 2274 fps | 95.9% |
| Norma MRP | <<locked>> | 98% | 43,221 psi | 88% | 2490 fps | 96.7% |
| Norma URP | <<locked>> | 90% | 42,902 psi | 87% | 2402 fps | 99% |
| Ramshot Hunter | <<locked>> | 92% | 44,556 psi | 90% | 2444 fps | 98% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,492 psi | 74% | 1552 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 43,540 psi | 88% | 2346 fps | 97.4% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 42,061 psi | 85% | 2441 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 42,844 psi | 87% | 2431 fps | 98.8% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 42,337 psi | 86% | 2444 fps | 98.4% |
| Rottweil R 903 | <<locked>> | 84% | 42,815 psi | 87% | 2352 fps | 99.9% |
| Rottweil R 907 | <<locked>> | 86% | 43,207 psi | 88% | 2329 fps | 96.1% |
| Shooters World Long Rifle | <<locked>> | 88% | 44,454 psi | 90% | 2359 fps | 98.2% |
| Shooters World SW4350 | <<locked>> | 88% | 42,235 psi | 86% | 2339 fps | 96.7% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 43,932 psi | 89% | 2402 fps | 99.7% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 42,351 psi | 86% | 2238 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 44,048 psi | 89% | 2313 fps | 96.9% |
| Somchem S355 | <<locked>> | 84% | 43,207 psi | 88% | 2349 fps | 99.8% |
| Somchem S365 | <<locked>> | 94% | 43,961 psi | 89% | 2457 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 43,714 psi | 89% | 2402 fps | 96.2% |
| Vihtavuori N150 | <<locked>> | 86% | 44,135 psi | 90% | 2336 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 42,264 psi | 86% | 2359 fps | 98.8% |
| Vihtavuori N550 | <<locked>> | 90% | 44,135 psi | 90% | 2408 fps | 99% |
| Vihtavuori N555 | <<locked>> | 98% | 42,859 psi | 87% | 2451 fps | 99.5% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 44,585 psi | 90% | 2385 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 43,105 psi | 87% | 2408 fps | 96.8% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 37,101 psi | 75% | 2454 fps | 99.9% |
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>> | 94% | 35,708 psi | 72% | 2264 fps | 95.7% |
| Accurate 4064 | <<locked>> | 80% | 41,655 psi | 84% | 2306 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 30,705 psi | 62% | 2162 fps | 95.8% |
| ADI AR 2208 | <<locked>> | 80% | 40,147 psi | 81% | 2277 fps | 98.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 40,045 psi | 81% | 2300 fps | 99.7% |
| Alliant Reloder-16 | <<locked>> | 80% | 31,038 psi | 63% | 2172 fps | 95.9% |
| Alliant Reloder-17 | <<locked>> | 80% | 34,722 psi | 70% | 2290 fps | 98.8% |
| Alliant Reloder-23 | <<locked>> | 86% | 27,137 psi | 55% | 2103 fps | 95.7% |
| Alliant Reloder-25 | <<locked>> | 98% | 34,432 psi | 70% | 2293 fps | 95.4% |
| Alliant Reloder-26 | 45.3 gr | 90% | 32,938 psi | 67% | 2306 fps | 95.9% |
| Bofors RP3 | <<locked>> | 80% | 39,784 psi | 81% | 2303 fps | 99.7% |
| Bofors RP7 | <<locked>> | 84% | 40,654 psi | 82% | 2283 fps | 95.3% |
| Hodgdon H380 | <<locked>> | 80% | 40,422 psi | 82% | 2310 fps | 98.1% |
| Hodgdon H414 | <<locked>> | 84% | 37,594 psi | 76% | 2306 fps | 95.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 28,616 psi | 58% | 2090 fps | 96.8% |
| Hodgdon Superformance | <<locked>> | 86% | 39,552 psi | 80% | 2369 fps | 95.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,701 psi | 54% | 1352 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 40,625 psi | 82% | 2306 fps | 95.4% |
| IMR 4451 Enduron | <<locked>> | 82% | 39,610 psi | 80% | 2264 fps | 95.5% |
| IMR 4831 | <<locked>> | 80% | 29,994 psi | 61% | 2129 fps | 95.5% |
| Lovex S065 | <<locked>> | 80% | 34,751 psi | 70% | 2175 fps | 95.6% |
| Lovex S070 | <<locked>> | 84% | 37,434 psi | 76% | 2247 fps | 95.3% |
| Lovex S071 | <<locked>> | 98% | 34,185 psi | 69% | 2231 fps | 95.1% |
| Norma MRP | <<locked>> | 96% | 40,640 psi | 82% | 2441 fps | 95.9% |
| Norma URP | <<locked>> | 80% | 31,111 psi | 63% | 2165 fps | 95.7% |
| Ramshot Hunter | <<locked>> | 84% | 34,592 psi | 70% | 2251 fps | 95% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,267 psi | 55% | 1388 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 40,756 psi | 83% | 2293 fps | 96.7% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 36,927 psi | 75% | 2343 fps | 100% |
| ReloadSwiss RS 62 | 39.2 gr | 80% | 30,443 psi | 62% | 2175 fps | 95.2% |
| ReloadSwiss RS 70 | 40.9 gr | 82% | 32,619 psi | 66% | 2231 fps | 95.1% |
| Rottweil R 903 | <<locked>> | 80% | 37,521 psi | 76% | 2257 fps | 99.3% |
| Rottweil R 907 | <<locked>> | 84% | 40,654 psi | 82% | 2283 fps | 95.3% |
| Shooters World Long Rifle | <<locked>> | 80% | 34,751 psi | 70% | 2175 fps | 95.6% |
| Shooters World SW4350 | <<locked>> | 84% | 37,434 psi | 76% | 2247 fps | 95.3% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 38,290 psi | 78% | 2303 fps | 99% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 39,784 psi | 81% | 2198 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 38,667 psi | 78% | 2218 fps | 95.4% |
| Somchem S355 | <<locked>> | 80% | 38,203 psi | 77% | 2260 fps | 99.3% |
| Somchem S365 | <<locked>> | 80% | 27,876 psi | 57% | 2126 fps | 98% |
| Somchem S385 | <<locked>> | 94% | 40,857 psi | 83% | 2349 fps | 95.4% |
| Vihtavuori N150 | <<locked>> | 80% | 36,347 psi | 74% | 2201 fps | 99.7% |
| Vihtavuori N160 | <<locked>> | 80% | 32,401 psi | 66% | 2165 fps | 96.2% |
| Vihtavuori N550 | <<locked>> | 80% | 31,894 psi | 65% | 2169 fps | 95.7% |
| Vihtavuori N555 | <<locked>> | 86% | 29,022 psi | 59% | 2165 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 32,169 psi | 65% | 2149 fps | 98.2% |
| Winchester 760 | <<locked>> | 84% | 37,840 psi | 77% | 2310 fps | 95.3% |
| Winchester StaBALL HD | <<locked>> | 90% | 27,064 psi | 55% | 2172 fps | 96.3% |
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 | Nosler Partition. Alliant Reloder-26 delivers the highest muzzle velocity at 2,530 fps; across all powders the maximum-charge window runs from 1,516 fps to 2,530 fps. Accurate 3100 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 1:10.5 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, ReloadSwiss RS 62 rank at the top here: for 7 x 57 R with the .284 | 175gr | Nosler Partition 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.