Load Specifications
Load data in caliber 7 x 57 R with .284 | 165gr | Geco SOFTPOINT bullet and 47 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% | 41,771 psi | 85% | 2464 fps | 97.2% |
| Accurate 4350 | <<locked>> | 90% | 44,237 psi | 90% | 2520 fps | 99.1% |
| ADI AR 2208 | <<locked>> | 82% | 43,410 psi | 88% | 2428 fps | 99.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 43,323 psi | 88% | 2448 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 90% | 43,076 psi | 87% | 2526 fps | 99.2% |
| Alliant Reloder-17 | <<locked>> | 86% | 43,134 psi | 87% | 2549 fps | 99.9% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 42,366 psi | 86% | 2539 fps | 99.8% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 37,260 psi | 76% | 2444 fps | 96.3% |
| Alliant Reloder-26 | <<locked>> | 98% | 44,469 psi | 90% | 2644 fps | 99.1% |
| Bofors RP3 | <<locked>> | 82% | 43,511 psi | 88% | 2461 fps | 99.9% |
| Bofors RP7 | <<locked>> | 86% | 43,845 psi | 89% | 2431 fps | 96% |
| Hodgdon H380 | <<locked>> | 82% | 44,063 psi | 89% | 2464 fps | 98.6% |
| Hodgdon H414 | <<locked>> | 88% | 43,932 psi | 89% | 2516 fps | 96.8% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 42,685 psi | 87% | 2467 fps | 99.8% |
| Hodgdon Superformance | <<locked>> | 88% | 43,308 psi | 88% | 2533 fps | 96.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,027 psi | 73% | 1591 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 44,208 psi | 90% | 2464 fps | 96.1% |
| IMR 4451 Enduron | <<locked>> | 84% | 42,757 psi | 87% | 2415 fps | 96.2% |
| IMR 4831 | <<locked>> | 90% | 42,279 psi | 86% | 2470 fps | 98.8% |
| Lovex S065 | <<locked>> | 86% | 42,540 psi | 86% | 2415 fps | 97.6% |
| Lovex S070 | <<locked>> | 88% | 42,989 psi | 87% | 2444 fps | 96.7% |
| Lovex S071ᴾ | <<locked>> | 100% | 37,217 psi | 75% | 2375 fps | 95.9% |
| Norma MRP | <<locked>> | 98% | 44,527 psi | 90% | 2605 fps | 96.8% |
| Norma URP | <<locked>> | 90% | 43,888 psi | 89% | 2510 fps | 98.9% |
| Ramshot Hunter | <<locked>> | 90% | 42,815 psi | 87% | 2507 fps | 97.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,506 psi | 74% | 1627 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 44,411 psi | 90% | 2451 fps | 97.4% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 43,062 psi | 87% | 2549 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 44,019 psi | 89% | 2543 fps | 98.9% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 43,497 psi | 88% | 2556 fps | 98.5% |
| Rottweil R 903 | <<locked>> | 84% | 43,656 psi | 89% | 2457 fps | 99.9% |
| Rottweil R 907 | <<locked>> | 86% | 43,845 psi | 89% | 2431 fps | 96% |
| Shooters World Long Rifle | <<locked>> | 86% | 42,540 psi | 86% | 2415 fps | 97.6% |
| Shooters World SW4350 | <<locked>> | 88% | 42,989 psi | 87% | 2444 fps | 96.7% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 41,959 psi | 85% | 2457 fps | 99.4% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 42,989 psi | 87% | 2339 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 41,872 psi | 85% | 2365 fps | 96.1% |
| Somchem S355 | <<locked>> | 84% | 44,121 psi | 89% | 2457 fps | 99.8% |
| Somchem S365 | <<locked>> | 92% | 42,293 psi | 86% | 2523 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 44,599 psi | 90% | 2507 fps | 96.2% |
| Vihtavuori N150 | <<locked>> | 84% | 42,235 psi | 86% | 2395 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 42,960 psi | 87% | 2461 fps | 98.7% |
| Vihtavuori N550 | <<locked>> | 88% | 42,395 psi | 86% | 2467 fps | 98.5% |
| Vihtavuori N555 | <<locked>> | 98% | 44,208 psi | 90% | 2562 fps | 99.5% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 42,656 psi | 87% | 2441 fps | 99.8% |
| Winchester 760 | <<locked>> | 88% | 43,932 psi | 89% | 2516 fps | 96.8% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 38,130 psi | 77% | 2566 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% | 36,492 psi | 74% | 2359 fps | 95.6% |
| Accurate 4350 | <<locked>> | 80% | 31,415 psi | 64% | 2257 fps | 95.7% |
| ADI AR 2208 | <<locked>> | 80% | 40,712 psi | 83% | 2379 fps | 98.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 40,872 psi | 83% | 2405 fps | 99.7% |
| Alliant Reloder-16 | 39 gr | 80% | 31,705 psi | 64% | 2274 fps | 95.8% |
| Alliant Reloder-17 | <<locked>> | 80% | 35,331 psi | 72% | 2388 fps | 98.8% |
| Alliant Reloder-23 | <<locked>> | 86% | 27,630 psi | 56% | 2195 fps | 95.6% |
| Alliant Reloder-25 | <<locked>> | 98% | 35,259 psi | 72% | 2398 fps | 95.4% |
| Alliant Reloder-26 | 48.4 gr | 90% | 33,649 psi | 68% | 2408 fps | 95.9% |
| Bofors RP3 | <<locked>> | 80% | 40,727 psi | 83% | 2411 fps | 99.7% |
| Bofors RP7 | <<locked>> | 84% | 41,133 psi | 83% | 2382 fps | 95.2% |
| Hodgdon H380 | <<locked>> | 80% | 41,292 psi | 84% | 2415 fps | 98.1% |
| Hodgdon H414 | <<locked>> | 84% | 38,377 psi | 78% | 2408 fps | 95.1% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 29,109 psi | 59% | 2182 fps | 96.7% |
| Hodgdon Superformance | <<locked>> | 86% | 40,408 psi | 82% | 2474 fps | 95.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,818 psi | 54% | 1417 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 41,553 psi | 84% | 2411 fps | 95.4% |
| IMR 4451 Enduron | <<locked>> | 82% | 40,176 psi | 81% | 2362 fps | 95.4% |
| IMR 4831 | <<locked>> | 80% | 30,647 psi | 62% | 2224 fps | 95.4% |
| Lovex S065 | <<locked>> | 80% | 35,259 psi | 72% | 2270 fps | 95.5% |
| Lovex S070 | <<locked>> | 84% | 38,130 psi | 77% | 2349 fps | 95.2% |
| Lovex S071 | <<locked>> | 98% | 35,041 psi | 71% | 2329 fps | 95.1% |
| Norma MRP | <<locked>> | 96% | 41,466 psi | 84% | 2546 fps | 95.8% |
| Norma URP | <<locked>> | 80% | 31,778 psi | 64% | 2260 fps | 95.7% |
| Ramshot Hunter | <<locked>> | 86% | 37,521 psi | 76% | 2398 fps | 95.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,064 psi | 55% | 1450 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 41,466 psi | 84% | 2395 fps | 96.6% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 37,594 psi | 76% | 2444 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 31,082 psi | 63% | 2270 fps | 95.1% |
| ReloadSwiss RS 70 | <<locked>> | 82% | 33,199 psi | 67% | 2329 fps | 95% |
| Rottweil R 903 | <<locked>> | 80% | 38,305 psi | 78% | 2359 fps | 99.3% |
| Rottweil R 907 | <<locked>> | 84% | 41,133 psi | 83% | 2382 fps | 95.2% |
| Shooters World Long Rifle | <<locked>> | 80% | 35,259 psi | 72% | 2270 fps | 95.5% |
| Shooters World SW4350 | <<locked>> | 84% | 38,130 psi | 77% | 2349 fps | 95.2% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 39,131 psi | 79% | 2405 fps | 99% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 40,248 psi | 82% | 2293 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 39,276 psi | 80% | 2316 fps | 95.4% |
| Somchem S355 | <<locked>> | 80% | 38,798 psi | 79% | 2359 fps | 99.2% |
| Somchem S365 | 39.8 gr | 80% | 28,485 psi | 58% | 2218 fps | 97.9% |
| Somchem S385 | <<locked>> | 94% | 41,829 psi | 85% | 2454 fps | 95.4% |
| Vihtavuori N150 | <<locked>> | 80% | 37,101 psi | 75% | 2303 fps | 99.7% |
| Vihtavuori N160 | <<locked>> | 80% | 33,054 psi | 67% | 2260 fps | 96.1% |
| Vihtavuori N550 | <<locked>> | 80% | 32,648 psi | 66% | 2264 fps | 95.7% |
| Vihtavuori N555 | <<locked>> | 86% | 29,820 psi | 60% | 2264 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 32,721 psi | 66% | 2241 fps | 98.1% |
| Winchester 760 | <<locked>> | 84% | 38,638 psi | 78% | 2415 fps | 95.2% |
| Winchester StaBALL HD | <<locked>> | 90% | 27,615 psi | 56% | 2267 fps | 96.2% |
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 47 powders for 7 x 57 R loaded with the .284 | 165gr | Geco SOFTPOINT. Alliant Reloder-26 delivers the highest muzzle velocity at 2,644 fps; across all powders the maximum-charge window runs from 1,591 fps to 2,644 fps. Alliant Reloder-23 gives the best case fill at 100 %, and 47 of the 47 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 165.0 gr projectile in 0.284" calls for a 1:13.5 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 | 165gr | 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.