Load Specifications
Load data in caliber 7 x 57 R with .284 | 170gr | Geco SOFTPOINT 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, Vihtavuori N555 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% | 42,743 psi | 87% | 2441 fps | 97.7% |
| Accurate 4350 | <<locked>> | 88% | 42,105 psi | 85% | 2444 fps | 98.9% |
| ADI AR 2208 | <<locked>> | 82% | 44,150 psi | 90% | 2402 fps | 99.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 44,106 psi | 89% | 2421 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 44,005 psi | 89% | 2507 fps | 99.5% |
| Alliant Reloder-17 | <<locked>> | 86% | 43,874 psi | 89% | 2523 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 43,221 psi | 88% | 2516 fps | 99.9% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 37,985 psi | 77% | 2428 fps | 97% |
| Alliant Reloder-26 | <<locked>> | 96% | 42,308 psi | 86% | 2566 fps | 98.9% |
| Bofors RP3 | <<locked>> | 82% | 44,121 psi | 89% | 2431 fps | 100% |
| Bofors RP7 | <<locked>> | 86% | 44,396 psi | 90% | 2405 fps | 96.5% |
| Hodgdon H414 | <<locked>> | 86% | 41,640 psi | 84% | 2434 fps | 96.5% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 43,410 psi | 88% | 2441 fps | 99.9% |
| Hodgdon Superformance | <<locked>> | 88% | 44,092 psi | 89% | 2510 fps | 96.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,955 psi | 73% | 1562 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 42,148 psi | 85% | 2388 fps | 95.9% |
| IMR 4451 Enduron | <<locked>> | 84% | 43,279 psi | 88% | 2385 fps | 96.6% |
| IMR 4831 | <<locked>> | 90% | 43,076 psi | 87% | 2444 fps | 99.1% |
| Lovex S065 | <<locked>> | 86% | 43,134 psi | 87% | 2388 fps | 98% |
| Lovex S070 | <<locked>> | 88% | 43,859 psi | 89% | 2421 fps | 97.2% |
| Lovex S071ᴾ | <<locked>> | 100% | 38,029 psi | 77% | 2356 fps | 96.5% |
| Norma MRP | <<locked>> | 96% | 42,308 psi | 86% | 2526 fps | 96.5% |
| Norma URP | <<locked>> | 88% | 42,105 psi | 85% | 2441 fps | 98.8% |
| Ramshot Hunter | <<locked>> | 90% | 43,584 psi | 88% | 2484 fps | 97.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,463 psi | 74% | 1598 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 43,758 psi | 89% | 2523 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 41,756 psi | 85% | 2464 fps | 98.7% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 43,976 psi | 89% | 2530 fps | 98.8% |
| Rottweil R 903 | <<locked>> | 84% | 44,324 psi | 90% | 2428 fps | 99.9% |
| Rottweil R 907 | <<locked>> | 86% | 44,396 psi | 90% | 2405 fps | 96.5% |
| Shooters World Long Rifle | <<locked>> | 86% | 43,134 psi | 87% | 2388 fps | 98% |
| Shooters World SW4350 | <<locked>> | 88% | 43,859 psi | 89% | 2421 fps | 97.2% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 42,583 psi | 86% | 2431 fps | 99.6% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 43,424 psi | 88% | 2306 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 42,467 psi | 86% | 2339 fps | 96.6% |
| Somchem S355 | <<locked>> | 82% | 42,163 psi | 86% | 2385 fps | 99.8% |
| Somchem S365 | <<locked>> | 92% | 43,105 psi | 87% | 2497 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 42,641 psi | 86% | 2434 fps | 96% |
| Vihtavuori N150 | <<locked>> | 84% | 42,844 psi | 87% | 2369 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 43,656 psi | 89% | 2434 fps | 99% |
| Vihtavuori N550 | <<locked>> | 88% | 43,105 psi | 87% | 2441 fps | 98.8% |
| Vihtavuori N555 | <<locked>> | 96% | 42,279 psi | 86% | 2490 fps | 99.4% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 43,076 psi | 87% | 2411 fps | 99.9% |
| Winchester 760 | <<locked>> | 86% | 41,887 psi | 85% | 2441 fps | 96.6% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 38,754 psi | 79% | 2546 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% | 34,809 psi | 71% | 2290 fps | 95.4% |
| Accurate 4350 | <<locked>> | 80% | 32,140 psi | 65% | 2241 fps | 96.4% |
| ADI AR 2208 | <<locked>> | 80% | 41,437 psi | 84% | 2352 fps | 99.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 41,379 psi | 84% | 2375 fps | 99.8% |
| Alliant Reloder-16 | <<locked>> | 80% | 32,097 psi | 65% | 2251 fps | 96.4% |
| Alliant Reloder-17 | <<locked>> | 80% | 35,868 psi | 73% | 2365 fps | 99.1% |
| Alliant Reloder-23 | <<locked>> | 84% | 26,339 psi | 53% | 2123 fps | 95.3% |
| Alliant Reloder-25 | <<locked>> | 96% | 33,576 psi | 68% | 2323 fps | 95% |
| Alliant Reloder-26 | 46.9 gr | 88% | 31,981 psi | 65% | 2333 fps | 95.5% |
| Bofors RP3 | <<locked>> | 80% | 41,307 psi | 84% | 2385 fps | 99.9% |
| Bofors RP7 | <<locked>> | 82% | 39,320 psi | 80% | 2310 fps | 95% |
| Hodgdon H414 | <<locked>> | 84% | 39,001 psi | 79% | 2385 fps | 95.7% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 29,689 psi | 60% | 2162 fps | 97.2% |
| Hodgdon Superformance | <<locked>> | 86% | 41,133 psi | 83% | 2454 fps | 95.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,934 psi | 55% | 1394 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 39,552 psi | 80% | 2339 fps | 95.1% |
| IMR 4451 Enduron | <<locked>> | 80% | 38,377 psi | 78% | 2293 fps | 95.2% |
| IMR 4831 | <<locked>> | 80% | 31,111 psi | 63% | 2201 fps | 96% |
| Lovex S065 | <<locked>> | 80% | 35,911 psi | 73% | 2247 fps | 96.1% |
| Lovex S070 | <<locked>> | 84% | 38,667 psi | 78% | 2323 fps | 95.7% |
| Lovex S071 | <<locked>> | 98% | 35,534 psi | 72% | 2306 fps | 95.6% |
| Norma MRP | <<locked>> | 94% | 39,450 psi | 80% | 2467 fps | 95.5% |
| Norma URP | <<locked>> | 80% | 32,227 psi | 65% | 2238 fps | 96.2% |
| Ramshot Hunter | <<locked>> | 84% | 35,795 psi | 73% | 2326 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,209 psi | 55% | 1427 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 38,145 psi | 77% | 2418 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 31,807 psi | 65% | 2257 fps | 95.8% |
| ReloadSwiss RS 70 | <<locked>> | 82% | 33,678 psi | 68% | 2306 fps | 95.7% |
| Rottweil R 903 | <<locked>> | 80% | 38,812 psi | 79% | 2333 fps | 99.5% |
| Rottweil R 907 | <<locked>> | 82% | 39,320 psi | 80% | 2310 fps | 95% |
| Shooters World Long Rifle | <<locked>> | 80% | 35,911 psi | 73% | 2247 fps | 96.1% |
| Shooters World SW4350 | <<locked>> | 84% | 38,667 psi | 78% | 2323 fps | 95.7% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 39,914 psi | 81% | 2382 fps | 99.3% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 40,944 psi | 83% | 2267 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 37,304 psi | 76% | 2244 fps | 95.1% |
| Somchem S355 | <<locked>> | 80% | 39,523 psi | 80% | 2336 fps | 99.5% |
| Somchem S365 | 39.4 gr | 80% | 28,921 psi | 59% | 2198 fps | 98.3% |
| Somchem S385 | <<locked>> | 92% | 39,987 psi | 81% | 2385 fps | 95.2% |
| Vihtavuori N150 | <<locked>> | 80% | 37,565 psi | 76% | 2274 fps | 99.8% |
| Vihtavuori N160 | <<locked>> | 80% | 33,750 psi | 68% | 2244 fps | 96.7% |
| Vihtavuori N550 | <<locked>> | 80% | 33,098 psi | 67% | 2241 fps | 96.2% |
| Vihtavuori N555 | 40.8 gr | 84% | 28,427 psi | 58% | 2192 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 33,214 psi | 67% | 2221 fps | 98.5% |
| Winchester 760 | <<locked>> | 84% | 39,247 psi | 80% | 2388 fps | 95.8% |
| Winchester StaBALL HD | <<locked>> | 88% | 26,440 psi | 54% | 2201 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 45 powders for 7 x 57 R loaded with the .284 | 170gr | Geco SOFTPOINT. Alliant Reloder-26 delivers the highest muzzle velocity at 2,566 fps; across all powders the maximum-charge window runs from 1,562 fps to 2,566 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 170.0 gr projectile in 0.284" calls for a 1:13.0 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, Vihtavuori N555, Somchem S365 rank at the top here: for 7 x 57 R with the .284 | 170gr | Geco SOFTPOINT 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.