Load Specifications
Load data in caliber 7 x 57 R with .284 | 177gr | Brenneke TIG bullet and 44 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 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 3100 | <<locked>> | 98% | 43,352 psi | 88% | 2402 fps | 98.1% |
| Accurate 4350 | <<locked>> | 88% | 42,946 psi | 87% | 2408 fps | 99.3% |
| Alliant Reloder-16 | <<locked>> | 90% | 44,483 psi | 90% | 2461 fps | 99.7% |
| Alliant Reloder-17 | <<locked>> | 86% | 44,440 psi | 90% | 2477 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 43,743 psi | 89% | 2470 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 38,479 psi | 78% | 2392 fps | 97.6% |
| Alliant Reloder-26 | <<locked>> | 96% | 43,018 psi | 87% | 2530 fps | 99.3% |
| Bofors RP7 | <<locked>> | 84% | 42,453 psi | 86% | 2323 fps | 96.4% |
| Hodgdon H414 | <<locked>> | 86% | 42,409 psi | 86% | 2398 fps | 97.1% |
| Hodgdon H4350 | <<locked>> | 84% | 43,149 psi | 88% | 2369 fps | 95.8% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 44,324 psi | 90% | 2402 fps | 100% |
| Hodgdon Superformance | <<locked>> | 88% | 44,585 psi | 90% | 2467 fps | 97.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,114 psi | 73% | 1526 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 42,612 psi | 86% | 2349 fps | 96.4% |
| IMR 4451 Enduron | <<locked>> | 84% | 43,787 psi | 89% | 2346 fps | 97.1% |
| IMR 4831 | <<locked>> | 90% | 43,932 psi | 89% | 2408 fps | 99.4% |
| Lovex S065 | <<locked>> | 86% | 43,729 psi | 89% | 2349 fps | 98.4% |
| Lovex S070 | <<locked>> | 88% | 44,324 psi | 90% | 2379 fps | 97.6% |
| Lovex S071ᴾ | <<locked>> | 100% | 38,740 psi | 79% | 2323 fps | 97.1% |
| Norma MRP | <<locked>> | 96% | 42,931 psi | 87% | 2487 fps | 97.1% |
| Norma URP | <<locked>> | 88% | 42,554 psi | 86% | 2398 fps | 99.2% |
| Ramshot Hunter | <<locked>> | 90% | 44,208 psi | 90% | 2441 fps | 98.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,651 psi | 74% | 1562 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 44,251 psi | 90% | 2477 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 42,453 psi | 86% | 2425 fps | 99% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 41,872 psi | 85% | 2438 fps | 98.7% |
| Rottweil R 903 | <<locked>> | 82% | 42,047 psi | 85% | 2339 fps | 99.9% |
| Rottweil R 907 | <<locked>> | 84% | 42,453 psi | 86% | 2323 fps | 96.4% |
| Shooters World Long Rifle | <<locked>> | 86% | 43,729 psi | 89% | 2349 fps | 98.4% |
| Shooters World SW4350 | <<locked>> | 88% | 44,324 psi | 90% | 2379 fps | 97.6% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 43,294 psi | 88% | 2392 fps | 99.8% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 44,135 psi | 90% | 2264 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 43,105 psi | 87% | 2303 fps | 97.1% |
| Somchem S355 | <<locked>> | 82% | 42,714 psi | 87% | 2339 fps | 99.9% |
| Somchem S365 | <<locked>> | 92% | 43,830 psi | 89% | 2454 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 43,366 psi | 88% | 2398 fps | 96.6% |
| Vihtavuori N150 | <<locked>> | 84% | 43,424 psi | 88% | 2323 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 44,483 psi | 90% | 2398 fps | 99.3% |
| Vihtavuori N165 | <<locked>> | 98% | 42,395 psi | 86% | 2369 fps | 95.8% |
| Vihtavuori N550 | <<locked>> | 88% | 43,642 psi | 89% | 2398 fps | 99.1% |
| Vihtavuori N555 | <<locked>> | 96% | 42,801 psi | 87% | 2448 fps | 99.6% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 43,729 psi | 89% | 2372 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 42,409 psi | 86% | 2398 fps | 97.1% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 39,392 psi | 80% | 2510 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>> | 90% | 33,054 psi | 67% | 2208 fps | 95.2% |
| Accurate 4350 | <<locked>> | 80% | 32,677 psi | 66% | 2205 fps | 97% |
| Alliant Reloder-16 | <<locked>> | 80% | 32,677 psi | 66% | 2218 fps | 97.1% |
| Alliant Reloder-17 | <<locked>> | 80% | 36,434 psi | 74% | 2329 fps | 99.4% |
| Alliant Reloder-23 | <<locked>> | 82% | 25,222 psi | 51% | 2047 fps | 95.1% |
| Alliant Reloder-25 | <<locked>> | 96% | 34,098 psi | 69% | 2290 fps | 95.9% |
| Alliant Reloder-26 | 44.9 gr | 86% | 30,327 psi | 62% | 2244 fps | 95.2% |
| Bofors RP7 | <<locked>> | 82% | 39,784 psi | 81% | 2270 fps | 95.6% |
| Hodgdon H414 | <<locked>> | 82% | 37,144 psi | 75% | 2297 fps | 95.5% |
| Hodgdon H4350 | <<locked>> | 82% | 40,422 psi | 82% | 2316 fps | 95% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 30,052 psi | 61% | 2126 fps | 97.8% |
| Hodgdon Superformance | <<locked>> | 84% | 38,928 psi | 79% | 2359 fps | 95.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,905 psi | 55% | 1362 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 40,205 psi | 82% | 2303 fps | 95.7% |
| IMR 4451 Enduron | <<locked>> | 80% | 38,783 psi | 79% | 2254 fps | 95.8% |
| IMR 4831 | <<locked>> | 80% | 31,575 psi | 64% | 2169 fps | 96.6% |
| Lovex S065 | <<locked>> | 80% | 36,274 psi | 74% | 2208 fps | 96.6% |
| Lovex S070 | <<locked>> | 82% | 36,753 psi | 75% | 2238 fps | 95.5% |
| Lovex S071 | <<locked>> | 96% | 33,982 psi | 69% | 2228 fps | 95.5% |
| Norma MRP | 46.7 gr | 92% | 37,652 psi | 76% | 2382 fps | 95.4% |
| Norma URP | <<locked>> | 80% | 32,924 psi | 67% | 2208 fps | 96.9% |
| Ramshot Hunter | <<locked>> | 82% | 34,142 psi | 69% | 2241 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,470 psi | 56% | 1394 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 38,754 psi | 79% | 2379 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 32,184 psi | 65% | 2218 fps | 96.4% |
| ReloadSwiss RS 70 | 41.4 gr | 80% | 31,937 psi | 65% | 2218 fps | 95.4% |
| Rottweil R 903 | <<locked>> | 80% | 39,581 psi | 80% | 2297 fps | 99.7% |
| Rottweil R 907 | <<locked>> | 82% | 39,784 psi | 81% | 2270 fps | 95.6% |
| Shooters World Long Rifle | <<locked>> | 80% | 36,274 psi | 74% | 2208 fps | 96.6% |
| Shooters World SW4350 | <<locked>> | 82% | 36,753 psi | 75% | 2238 fps | 95.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 40,277 psi | 82% | 2339 fps | 99.5% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 41,539 psi | 84% | 2224 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 37,840 psi | 77% | 2205 fps | 95.7% |
| Somchem S355 | <<locked>> | 80% | 39,987 psi | 81% | 2293 fps | 99.7% |
| Somchem S365 | <<locked>> | 80% | 29,530 psi | 60% | 2169 fps | 98.8% |
| Somchem S385 | <<locked>> | 90% | 37,985 psi | 77% | 2297 fps | 95% |
| Vihtavuori N150 | <<locked>> | 80% | 38,276 psi | 78% | 2238 fps | 99.9% |
| Vihtavuori N160 | <<locked>> | 80% | 34,214 psi | 69% | 2205 fps | 97.2% |
| Vihtavuori N165 | <<locked>> | 96% | 39,972 psi | 81% | 2326 fps | 95.1% |
| Vihtavuori N550 | <<locked>> | 80% | 33,591 psi | 68% | 2205 fps | 96.8% |
| Vihtavuori N555 | <<locked>> | 82% | 27,224 psi | 55% | 2116 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 33,518 psi | 68% | 2182 fps | 98.9% |
| Winchester 760 | <<locked>> | 82% | 37,144 psi | 75% | 2297 fps | 95.5% |
| Winchester StaBALL HD | <<locked>> | 86% | 25,193 psi | 51% | 2116 fps | 95.6% |
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 44 powders for 7 x 57 R loaded with the .284 | 177gr | Brenneke TIG. Alliant Reloder-26 delivers the highest muzzle velocity at 2,530 fps; across all powders the maximum-charge window runs from 1,526 fps to 2,530 fps. Alliant Reloder-23 gives the best case fill at 100 %, and 44 of the 44 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 177.0 gr projectile in 0.284" calls for a 1:11.5 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, ReloadSwiss RS 70 rank at the top here: for 7 x 57 R with the .284 | 177gr | Brenneke TIG 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.