Load Specifications
Load data in caliber 7 x 57 R with .284 | 175gr | Speer Magnum Tip Soft Point bullet and 45 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, Norma MRP 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.
A valid access license is required to use the Personalized Load Calculator.
You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 23.62"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 98% | 42,902 psi | 87% | 2408 fps | 97.9% |
| Accurate 4350 | <<locked>> | 88% | 42,612 psi | 86% | 2411 fps | 99.2% |
| ADI AR 2208 | <<locked>> | 82% | 44,411 psi | 90% | 2365 fps | 99.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 44,425 psi | 90% | 2385 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 44,222 psi | 90% | 2467 fps | 99.6% |
| Alliant Reloder-17 | <<locked>> | 86% | 44,135 psi | 90% | 2484 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 43,395 psi | 88% | 2477 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 38,189 psi | 77% | 2395 fps | 97.3% |
| Alliant Reloder-26 | <<locked>> | 96% | 42,627 psi | 86% | 2533 fps | 99.2% |
| Bofors RP3 | <<locked>> | 82% | 44,527 psi | 90% | 2398 fps | 100% |
| Bofors RP7 | <<locked>> | 84% | 41,930 psi | 85% | 2323 fps | 96% |
| Hodgdon H414 | <<locked>> | 86% | 42,134 psi | 85% | 2405 fps | 96.8% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 43,671 psi | 89% | 2405 fps | 99.9% |
| Hodgdon Superformance | <<locked>> | 88% | 44,266 psi | 90% | 2474 fps | 96.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,984 psi | 73% | 1532 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 42,337 psi | 86% | 2356 fps | 96.2% |
| IMR 4451 Enduron | <<locked>> | 84% | 43,584 psi | 88% | 2356 fps | 97% |
| IMR 4831 | <<locked>> | 90% | 43,323 psi | 88% | 2411 fps | 99.3% |
| Lovex S065 | <<locked>> | 86% | 43,482 psi | 88% | 2359 fps | 98.3% |
| Lovex S070 | <<locked>> | 88% | 44,019 psi | 89% | 2385 fps | 97.4% |
| Lovex S071ᴾ | <<locked>> | 100% | 38,130 psi | 77% | 2323 fps | 96.8% |
| Norma MRP | <<locked>> | 96% | 42,583 psi | 86% | 2493 fps | 96.8% |
| Norma URP | <<locked>> | 88% | 42,279 psi | 86% | 2405 fps | 99% |
| Ramshot Hunter | <<locked>> | 90% | 43,903 psi | 89% | 2448 fps | 98.1% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,506 psi | 74% | 1568 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 43,976 psi | 89% | 2484 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 42,119 psi | 85% | 2428 fps | 98.9% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 44,382 psi | 90% | 2497 fps | 99% |
| Rottweil R 903 | <<locked>> | 82% | 41,800 psi | 85% | 2346 fps | 99.9% |
| Rottweil R 907 | <<locked>> | 84% | 41,930 psi | 85% | 2323 fps | 96% |
| Shooters World Long Rifle | <<locked>> | 86% | 43,482 psi | 88% | 2359 fps | 98.3% |
| Shooters World SW4350 | <<locked>> | 88% | 44,019 psi | 89% | 2385 fps | 97.4% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 42,728 psi | 87% | 2392 fps | 99.7% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 43,918 psi | 89% | 2274 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 42,873 psi | 87% | 2310 fps | 96.9% |
| Somchem S355 | <<locked>> | 82% | 42,467 psi | 86% | 2349 fps | 99.8% |
| Somchem S365 | <<locked>> | 92% | 43,468 psi | 88% | 2461 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 43,033 psi | 87% | 2402 fps | 96.4% |
| Vihtavuori N150 | <<locked>> | 84% | 43,178 psi | 88% | 2333 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 44,164 psi | 90% | 2405 fps | 99.2% |
| Vihtavuori N550 | <<locked>> | 88% | 43,352 psi | 88% | 2408 fps | 99% |
| Vihtavuori N555 | <<locked>> | 96% | 42,438 psi | 86% | 2451 fps | 99.5% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 43,453 psi | 88% | 2379 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 42,134 psi | 85% | 2405 fps | 96.8% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 39,030 psi | 79% | 2513 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% | 35,128 psi | 71% | 2260 fps | 95.8% |
| Accurate 4350 | <<locked>> | 80% | 32,430 psi | 66% | 2211 fps | 96.7% |
| ADI AR 2208 | <<locked>> | 80% | 41,611 psi | 84% | 2320 fps | 99.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 41,611 psi | 84% | 2339 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 80% | 32,285 psi | 65% | 2218 fps | 96.8% |
| Alliant Reloder-17 | <<locked>> | 80% | 36,187 psi | 73% | 2333 fps | 99.3% |
| Alliant Reloder-23 | <<locked>> | 84% | 26,571 psi | 54% | 2100 fps | 95.8% |
| Alliant Reloder-25 | <<locked>> | 96% | 33,866 psi | 69% | 2297 fps | 95.5% |
| Alliant Reloder-26 | 46.1 gr | 88% | 32,314 psi | 66% | 2306 fps | 96% |
| Bofors RP3 | <<locked>> | 80% | 41,626 psi | 84% | 2349 fps | 99.9% |
| Bofors RP7 | <<locked>> | 82% | 39,595 psi | 80% | 2280 fps | 95.4% |
| Hodgdon H414 | <<locked>> | 82% | 36,869 psi | 75% | 2303 fps | 95.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 29,863 psi | 61% | 2133 fps | 97.5% |
| Hodgdon Superformance | <<locked>> | 84% | 38,377 psi | 78% | 2359 fps | 95.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,803 psi | 54% | 1365 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 39,697 psi | 81% | 2306 fps | 95.4% |
| IMR 4451 Enduron | <<locked>> | 80% | 38,580 psi | 78% | 2260 fps | 95.5% |
| IMR 4831 | <<locked>> | 80% | 31,357 psi | 64% | 2172 fps | 96.4% |
| Lovex S065 | <<locked>> | 80% | 36,085 psi | 73% | 2215 fps | 96.4% |
| Lovex S070 | <<locked>> | 82% | 36,550 psi | 74% | 2244 fps | 95.3% |
| Lovex S071 | <<locked>> | 96% | 33,692 psi | 68% | 2231 fps | 95.2% |
| Norma MRP | 47.8 gr | 94% | 39,871 psi | 81% | 2438 fps | 96% |
| Norma URP | <<locked>> | 80% | 32,460 psi | 66% | 2208 fps | 96.5% |
| Ramshot Hunter | <<locked>> | 82% | 33,721 psi | 68% | 2244 fps | 95% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,354 psi | 55% | 1401 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 38,522 psi | 78% | 2385 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 31,937 psi | 65% | 2224 fps | 96.1% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 31,763 psi | 64% | 2224 fps | 95.1% |
| Rottweil R 903 | <<locked>> | 80% | 39,059 psi | 79% | 2300 fps | 99.6% |
| Rottweil R 907 | <<locked>> | 82% | 39,595 psi | 80% | 2280 fps | 95.4% |
| Shooters World Long Rifle | <<locked>> | 80% | 36,085 psi | 73% | 2215 fps | 96.4% |
| Shooters World SW4350 | <<locked>> | 82% | 36,550 psi | 74% | 2244 fps | 95.3% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 40,016 psi | 81% | 2346 fps | 99.4% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 41,060 psi | 83% | 2228 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 37,594 psi | 76% | 2211 fps | 95.4% |
| Somchem S355 | <<locked>> | 80% | 39,740 psi | 81% | 2300 fps | 99.6% |
| Somchem S365 | 38.7 gr | 80% | 29,109 psi | 59% | 2169 fps | 98.6% |
| Somchem S385 | <<locked>> | 92% | 40,292 psi | 82% | 2352 fps | 95.6% |
| Vihtavuori N150 | <<locked>> | 80% | 37,797 psi | 77% | 2241 fps | 99.9% |
| Vihtavuori N160 | <<locked>> | 80% | 33,968 psi | 69% | 2211 fps | 97% |
| Vihtavuori N550 | <<locked>> | 80% | 33,373 psi | 68% | 2211 fps | 96.6% |
| Vihtavuori N555 | <<locked>> | 84% | 28,689 psi | 58% | 2165 fps | 95.9% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 33,344 psi | 68% | 2188 fps | 98.7% |
| Winchester 760 | <<locked>> | 82% | 36,869 psi | 75% | 2303 fps | 95.2% |
| Winchester StaBALL HD | <<locked>> | 86% | 24,889 psi | 50% | 2113 fps | 95% |
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 45 powders for 7 x 57 R loaded with the .284 | 175gr | Speer Magnum Tip Soft Point. Alliant Reloder-26 delivers the highest muzzle velocity at 2,533 fps; across all powders the maximum-charge window runs from 1,532 fps to 2,533 fps. Alliant Reloder-23 gives the best case fill at 100 %, and 45 of the 45 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 1:12.5 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, Norma MRP, Somchem S365 rank at the top here: for 7 x 57 R with the .284 | 175gr | Speer Magnum Tip 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.