Load Specifications
Load data in caliber 7 x 57 R with .284 | 160gr | 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, Somchem S365 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 3100ᴾ | <<locked>> | 100% | 42,598 psi | 86% | 2507 fps | 96.9% |
| Accurate 4064 | <<locked>> | 82% | 43,642 psi | 89% | 2464 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 42,366 psi | 86% | 2520 fps | 98.5% |
| ADI AR 2208 | <<locked>> | 82% | 41,916 psi | 85% | 2431 fps | 98.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 44,469 psi | 90% | 2500 fps | 99.8% |
| Alliant Reloder-16 | <<locked>> | 92% | 44,251 psi | 90% | 2579 fps | 99.1% |
| Alliant Reloder-17 | <<locked>> | 88% | 44,280 psi | 90% | 2602 fps | 99.8% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 40,756 psi | 83% | 2539 fps | 99.5% |
| Alliant Reloder-26 | <<locked>> | 98% | 42,453 psi | 86% | 2635 fps | 98.3% |
| Bofors RP3 | <<locked>> | 84% | 44,614 psi | 90% | 2513 fps | 99.9% |
| Hodgdon H380 | <<locked>> | 82% | 42,424 psi | 86% | 2467 fps | 98% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 43,540 psi | 88% | 2516 fps | 99.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,853 psi | 73% | 1608 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 44,034 psi | 89% | 2461 fps | 99.2% |
| IMR 4451 Enduron | <<locked>> | 86% | 44,019 psi | 89% | 2467 fps | 96% |
| IMR 4831 | <<locked>> | 92% | 43,337 psi | 88% | 2520 fps | 98.7% |
| Lovex S062 | <<locked>> | 82% | 44,034 psi | 89% | 2464 fps | 99.9% |
| Lovex S065 | <<locked>> | 88% | 43,714 psi | 89% | 2467 fps | 97.5% |
| Lovex S070 | <<locked>> | 90% | 44,150 psi | 90% | 2497 fps | 96.5% |
| Norma 203B | <<locked>> | 82% | 44,135 psi | 90% | 2503 fps | 99.5% |
| Norma URP | <<locked>> | 90% | 42,163 psi | 86% | 2513 fps | 98.3% |
| Ramshot Big Game | <<locked>> | 82% | 44,063 psi | 89% | 2523 fps | 99.4% |
| Ramshot Hunter | <<locked>> | 92% | 43,961 psi | 89% | 2556 fps | 97.2% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,303 psi | 74% | 1644 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 42,902 psi | 87% | 2454 fps | 96.5% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 44,222 psi | 90% | 2605 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 41,887 psi | 85% | 2536 fps | 98.1% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 44,454 psi | 90% | 2605 fps | 98.3% |
| Rottweil R 903 | <<locked>> | 86% | 44,483 psi | 90% | 2507 fps | 99.8% |
| Shooters World Long Rifle | <<locked>> | 88% | 43,714 psi | 89% | 2467 fps | 97.5% |
| Shooters World Precision | <<locked>> | 82% | 44,034 psi | 89% | 2464 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 90% | 44,150 psi | 90% | 2497 fps | 96.5% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 43,062 psi | 87% | 2510 fps | 99.3% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 44,309 psi | 90% | 2392 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 43,149 psi | 88% | 2415 fps | 95.9% |
| Somchem S355 | <<locked>> | 84% | 42,467 psi | 86% | 2461 fps | 99.5% |
| Somchem S365 | <<locked>> | 94% | 43,033 psi | 87% | 2569 fps | 100% |
| Vihtavuori N150 | <<locked>> | 86% | 43,134 psi | 87% | 2444 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 44,135 psi | 90% | 2513 fps | 98.6% |
| Vihtavuori N540 | <<locked>> | 82% | 44,570 psi | 90% | 2457 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 43,439 psi | 88% | 2520 fps | 98.3% |
| Vihtavuori N555 | <<locked>> | 98% | 42,003 psi | 85% | 2559 fps | 98.9% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 43,874 psi | 89% | 2493 fps | 99.8% |
| Winchester 760 | <<locked>> | 88% | 42,235 psi | 86% | 2516 fps | 95.8% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 36,303 psi | 74% | 2549 fps | 99.5% |
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>> | 96% | 37,318 psi | 76% | 2408 fps | 95.4% |
| Accurate 4064 | <<locked>> | 80% | 40,843 psi | 83% | 2418 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 32,097 psi | 65% | 2306 fps | 95.5% |
| ADI AR 2208 | <<locked>> | 80% | 39,523 psi | 80% | 2385 fps | 98.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 39,276 psi | 80% | 2408 fps | 99.3% |
| Alliant Reloder-16 | <<locked>> | 82% | 32,532 psi | 66% | 2323 fps | 95.6% |
| Alliant Reloder-17 | <<locked>> | 80% | 33,953 psi | 69% | 2385 fps | 98% |
| Alliant Reloder-23 | <<locked>> | 88% | 28,239 psi | 57% | 2238 fps | 95.3% |
| Alliant Reloder-26 | 48.9 gr | 92% | 34,447 psi | 70% | 2454 fps | 95.6% |
| Bofors RP3 | <<locked>> | 80% | 39,088 psi | 79% | 2415 fps | 99.4% |
| Hodgdon H380 | <<locked>> | 80% | 39,769 psi | 81% | 2415 fps | 97.3% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 28,079 psi | 57% | 2178 fps | 95.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,556 psi | 54% | 1430 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 41,524 psi | 84% | 2415 fps | 98.8% |
| IMR 4451 Enduron | <<locked>> | 84% | 41,336 psi | 84% | 2415 fps | 95.3% |
| IMR 4831 | <<locked>> | 82% | 31,328 psi | 64% | 2274 fps | 95.2% |
| Lovex S062 | <<locked>> | 80% | 41,553 psi | 84% | 2421 fps | 99.8% |
| Lovex S065 | <<locked>> | 82% | 36,390 psi | 74% | 2323 fps | 95.4% |
| Lovex S070 | <<locked>> | 88% | 41,408 psi | 84% | 2444 fps | 95.7% |
| Norma 203B | <<locked>> | 80% | 41,365 psi | 84% | 2454 fps | 99.1% |
| Norma URP | <<locked>> | 82% | 32,532 psi | 66% | 2310 fps | 95.4% |
| Ramshot Big Game | <<locked>> | 80% | 41,002 psi | 83% | 2470 fps | 99% |
| Ramshot Hunter | <<locked>> | 88% | 38,479 psi | 78% | 2448 fps | 95.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,050 psi | 55% | 1470 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 39,987 psi | 81% | 2398 fps | 95.7% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 36,129 psi | 73% | 2448 fps | 99.9% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 34,142 psi | 69% | 2375 fps | 95.8% |
| ReloadSwiss RS 70 | 45.3 gr | 86% | 36,506 psi | 74% | 2434 fps | 95.8% |
| Rottweil R 903 | <<locked>> | 80% | 36,680 psi | 74% | 2359 fps | 98.8% |
| Shooters World Long Rifle | <<locked>> | 82% | 36,390 psi | 74% | 2323 fps | 95.4% |
| Shooters World Precision | <<locked>> | 80% | 41,553 psi | 84% | 2421 fps | 99.8% |
| Shooters World SW4350 | <<locked>> | 88% | 41,408 psi | 84% | 2444 fps | 95.7% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 37,550 psi | 76% | 2405 fps | 98.3% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 39,044 psi | 79% | 2306 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 40,422 psi | 82% | 2365 fps | 95.2% |
| Somchem S355 | <<locked>> | 80% | 37,521 psi | 76% | 2365 fps | 98.8% |
| Somchem S365 | 39.3 gr | 80% | 27,282 psi | 55% | 2215 fps | 96.8% |
| Vihtavuori N150 | <<locked>> | 80% | 35,636 psi | 72% | 2306 fps | 99.3% |
| Vihtavuori N160 | <<locked>> | 80% | 31,662 psi | 64% | 2260 fps | 95% |
| Vihtavuori N540 | <<locked>> | 80% | 41,829 psi | 85% | 2415 fps | 100% |
| Vihtavuori N550 | <<locked>> | 82% | 33,344 psi | 68% | 2313 fps | 95.5% |
| Vihtavuori N555 | <<locked>> | 88% | 30,168 psi | 61% | 2303 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 31,589 psi | 64% | 2241 fps | 97.3% |
| Winchester 760 | <<locked>> | 86% | 39,595 psi | 80% | 2464 fps | 95% |
| Winchester StaBALL HD | <<locked>> | 92% | 28,268 psi | 57% | 2310 fps | 95.8% |
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 | 160gr | Speer Magnum Tip Soft Point. Alliant Reloder-26 delivers the highest muzzle velocity at 2,635 fps; across all powders the maximum-charge window runs from 1,608 fps to 2,635 fps. Accurate 3100 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 160.0 gr projectile in 0.284" calls for a 1:12.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, Alliant Reloder-23, 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, Somchem S365, ReloadSwiss RS 70 rank at the top here: for 7 x 57 R with the .284 | 160gr | 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.