Load Specifications
Load data in caliber 7 x 57 R with .284 | 175gr | Barnes X S bullet and 42 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 Vihtavuori N555.
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% | 43,105 psi | 87% | 2362 fps | 97.4% |
| Accurate 4350 | <<locked>> | 88% | 42,844 psi | 87% | 2372 fps | 98.8% |
| ADI AR 2208 | <<locked>> | 82% | 44,251 psi | 90% | 2316 fps | 99.3% |
| Alliant Reloder-16 | <<locked>> | 90% | 43,772 psi | 89% | 2411 fps | 99.2% |
| Alliant Reloder-17 | <<locked>> | 86% | 43,961 psi | 89% | 2438 fps | 99.9% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 43,120 psi | 87% | 2428 fps | 99.9% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 38,232 psi | 78% | 2343 fps | 96.5% |
| Alliant Reloder-26 | <<locked>> | 96% | 42,090 psi | 85% | 2474 fps | 98.6% |
| Hodgdon H414 | <<locked>> | 84% | 42,757 psi | 87% | 2372 fps | 96.4% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 43,439 psi | 88% | 2359 fps | 99.8% |
| Hodgdon Superformance | <<locked>> | 88% | 43,976 psi | 89% | 2418 fps | 96.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,289 psi | 74% | 1499 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 43,555 psi | 88% | 2297 fps | 99.3% |
| IMR 4166 Enduron | <<locked>> | 82% | 43,105 psi | 87% | 2267 fps | 96.3% |
| IMR 4451 Enduron | <<locked>> | 84% | 43,482 psi | 88% | 2303 fps | 96.3% |
| IMR 4831 | <<locked>> | 94% | 44,266 psi | 90% | 2379 fps | 99.1% |
| Lovex S065 | <<locked>> | 86% | 43,671 psi | 89% | 2310 fps | 97.8% |
| Lovex S070 | <<locked>> | 88% | 44,121 psi | 89% | 2336 fps | 96.9% |
| Lovex S071ᴾ | <<locked>> | 100% | 38,653 psi | 78% | 2283 fps | 96.3% |
| Norma MRP | <<locked>> | 96% | 42,308 psi | 86% | 2438 fps | 96% |
| Norma URP | <<locked>> | 90% | 44,599 psi | 90% | 2402 fps | 99% |
| Ramshot Hunter | <<locked>> | 90% | 43,482 psi | 88% | 2395 fps | 97.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,956 psi | 75% | 1539 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 43,613 psi | 88% | 2434 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 41,989 psi | 85% | 2385 fps | 98.5% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 43,888 psi | 89% | 2438 fps | 98.5% |
| Rottweil R 903 | <<locked>> | 82% | 42,453 psi | 86% | 2310 fps | 99.8% |
| Shooters World Long Rifle | <<locked>> | 86% | 43,671 psi | 89% | 2310 fps | 97.8% |
| Shooters World SW4350 | <<locked>> | 88% | 44,121 psi | 89% | 2336 fps | 96.9% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 42,743 psi | 87% | 2349 fps | 99.5% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 44,005 psi | 89% | 2231 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 43,236 psi | 88% | 2264 fps | 96.4% |
| Somchem S355 | <<locked>> | 82% | 42,917 psi | 87% | 2310 fps | 99.7% |
| Somchem S365 | <<locked>> | 92% | 43,178 psi | 88% | 2415 fps | 100% |
| Unknown powder | <<locked>> | 86% | 42,801 psi | 87% | 2359 fps | 98.2% |
| Vihtavuori N150 | <<locked>> | 84% | 43,381 psi | 88% | 2290 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 43,845 psi | 89% | 2352 fps | 98.8% |
| Vihtavuori N550 | <<locked>> | 88% | 43,134 psi | 87% | 2359 fps | 98.6% |
| Vihtavuori N555 | <<locked>> | 96% | 42,235 psi | 86% | 2408 fps | 99.2% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 43,250 psi | 88% | 2329 fps | 99.9% |
| Winchester 760 | <<locked>> | 84% | 42,757 psi | 87% | 2372 fps | 96.4% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 39,117 psi | 79% | 2461 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% | 35,882 psi | 73% | 2231 fps | 95.4% |
| Accurate 4350 | <<locked>> | 80% | 33,417 psi | 68% | 2185 fps | 96.5% |
| ADI AR 2208 | <<locked>> | 80% | 41,727 psi | 85% | 2274 fps | 99% |
| Alliant Reloder-16 | 35.1 gr | 80% | 32,837 psi | 67% | 2182 fps | 96.3% |
| Alliant Reloder-17 | <<locked>> | 80% | 36,303 psi | 74% | 2290 fps | 99% |
| Alliant Reloder-23 | <<locked>> | 84% | 27,514 psi | 56% | 2073 fps | 95.5% |
| Alliant Reloder-25 | <<locked>> | 98% | 36,129 psi | 73% | 2297 fps | 95.7% |
| Alliant Reloder-26 | 42.6 gr | 88% | 32,721 psi | 66% | 2264 fps | 95.3% |
| Hodgdon H414 | <<locked>> | 82% | 39,987 psi | 81% | 2320 fps | 95.6% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 30,603 psi | 62% | 2100 fps | 97.3% |
| Hodgdon Superformance | <<locked>> | 86% | 41,220 psi | 84% | 2365 fps | 95.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,340 psi | 55% | 1342 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 41,263 psi | 84% | 2254 fps | 99% |
| IMR 4166 Enduron | <<locked>> | 80% | 40,683 psi | 83% | 2221 fps | 95.6% |
| IMR 4451 Enduron | <<locked>> | 82% | 41,075 psi | 83% | 2257 fps | 95.7% |
| IMR 4831 | <<locked>> | 82% | 31,212 psi | 63% | 2123 fps | 95.7% |
| Lovex S065 | <<locked>> | 80% | 36,941 psi | 75% | 2182 fps | 96% |
| Lovex S070 | <<locked>> | 84% | 39,537 psi | 80% | 2254 fps | 95.6% |
| Lovex S071 | <<locked>> | 98% | 36,593 psi | 74% | 2244 fps | 95.6% |
| Norma MRP | <<locked>> | 94% | 39,711 psi | 81% | 2385 fps | 95.1% |
| Norma URP | <<locked>> | 80% | 33,199 psi | 67% | 2178 fps | 96.3% |
| Ramshot Hunter | <<locked>> | 84% | 36,332 psi | 74% | 2254 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,731 psi | 56% | 1371 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 38,435 psi | 78% | 2339 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 32,648 psi | 66% | 2192 fps | 95.8% |
| ReloadSwiss RS 70 | <<locked>> | 82% | 34,403 psi | 70% | 2238 fps | 95.5% |
| Rottweil R 903 | <<locked>> | 80% | 39,929 psi | 81% | 2267 fps | 99.5% |
| Shooters World Long Rifle | <<locked>> | 80% | 36,941 psi | 75% | 2182 fps | 96% |
| Shooters World SW4350 | <<locked>> | 84% | 39,537 psi | 80% | 2254 fps | 95.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 39,958 psi | 81% | 2300 fps | 99.1% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 41,394 psi | 84% | 2192 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 40,712 psi | 83% | 2221 fps | 95.7% |
| Somchem S355 | <<locked>> | 80% | 40,437 psi | 82% | 2267 fps | 99.5% |
| Somchem S365 | <<locked>> | 80% | 30,124 psi | 61% | 2146 fps | 98.5% |
| Unknown powder | <<locked>> | 80% | 35,708 psi | 72% | 2221 fps | 96.4% |
| Vihtavuori N150 | <<locked>> | 80% | 38,450 psi | 78% | 2208 fps | 99.8% |
| Vihtavuori N160 | <<locked>> | 80% | 34,447 psi | 70% | 2175 fps | 96.6% |
| Vihtavuori N550 | <<locked>> | 80% | 34,127 psi | 69% | 2182 fps | 96.3% |
| Vihtavuori N555 | 37.1 gr | 84% | 29,646 psi | 60% | 2142 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 33,779 psi | 69% | 2149 fps | 98.4% |
| Winchester 760 | <<locked>> | 82% | 39,987 psi | 81% | 2320 fps | 95.6% |
| Winchester StaBALL HD | <<locked>> | 88% | 27,659 psi | 56% | 2149 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 42 powders for 7 x 57 R loaded with the .284 | 175gr | Barnes X S. Alliant Reloder-26 delivers the highest muzzle velocity at 2,474 fps; across all powders the maximum-charge window runs from 1,499 fps to 2,474 fps. Alliant Reloder-23 gives the best case fill at 100 %, and 42 of the 42 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (340 MPa), the top charges use 74–90 %, leaving at least 10 % headroom. The 175.0 gr projectile in 0.284" calls for a 1:9.5 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, Vihtavuori N555 rank at the top here: for 7 x 57 R with the .284 | 175gr | Barnes X S 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.