Load Specifications
Load data in caliber 7 x 57 R with .284 | 184gr | Berger F-Open Hybrid Target bullet and 53 powders. The key underlying parameters are shown in the table above.
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% | 42,714 psi | 87% | 2316 fps | 97.8% |
| Accurate 4064 | <<locked>> | 82% | 43,859 psi | 89% | 2264 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 42,540 psi | 86% | 2323 fps | 99.1% |
| ADI AR 2208 | <<locked>> | 82% | 42,264 psi | 86% | 2238 fps | 99.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 42,221 psi | 86% | 2260 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 92% | 44,367 psi | 90% | 2375 fps | 99.6% |
| Alliant Reloder-17 | <<locked>> | 88% | 44,483 psi | 90% | 2398 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 40,886 psi | 83% | 2346 fps | 99.9% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 36,056 psi | 73% | 2260 fps | 96.4% |
| Alliant Reloder-26 | <<locked>> | 98% | 42,453 psi | 86% | 2438 fps | 99.1% |
| Bofors RP3 | <<locked>> | 82% | 42,076 psi | 85% | 2270 fps | 99.9% |
| Bofors RP7 | <<locked>> | 86% | 42,540 psi | 86% | 2244 fps | 96.1% |
| Hodgdon H380 | <<locked>> | 82% | 42,569 psi | 86% | 2270 fps | 98.7% |
| Hodgdon H414 | <<locked>> | 88% | 42,192 psi | 86% | 2320 fps | 96.8% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 43,845 psi | 89% | 2320 fps | 99.9% |
| Hodgdon Superformance | <<locked>> | 88% | 41,626 psi | 84% | 2333 fps | 96.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,795 psi | 73% | 1453 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 44,411 psi | 90% | 2267 fps | 99.7% |
| IMR 4350 | <<locked>> | 90% | 42,801 psi | 87% | 2270 fps | 96.2% |
| IMR 4451 Enduron | <<locked>> | 86% | 44,309 psi | 90% | 2274 fps | 97% |
| IMR 4831 | <<locked>> | 92% | 43,453 psi | 88% | 2323 fps | 99.3% |
| Lovex S062 | <<locked>> | 82% | 44,483 psi | 90% | 2267 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 43,874 psi | 89% | 2274 fps | 98.3% |
| Lovex S070 | <<locked>> | 90% | 44,440 psi | 90% | 2303 fps | 97.5% |
| Lovex S071ᴾ | <<locked>> | 100% | 35,563 psi | 72% | 2192 fps | 95.9% |
| Norma 203B | <<locked>> | 82% | 44,614 psi | 90% | 2306 fps | 99.8% |
| Norma MRP | <<locked>> | 98% | 42,482 psi | 86% | 2398 fps | 96.7% |
| Norma URP | <<locked>> | 90% | 42,496 psi | 86% | 2320 fps | 99% |
| Ramshot Big Game | <<locked>> | 82% | 44,150 psi | 90% | 2323 fps | 99.8% |
| Ramshot Hunter | <<locked>> | 92% | 43,918 psi | 89% | 2359 fps | 98% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,361 psi | 74% | 1490 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 42,946 psi | 87% | 2257 fps | 97.5% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 44,425 psi | 90% | 2398 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 42,119 psi | 85% | 2343 fps | 98.9% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 44,585 psi | 90% | 2405 fps | 99% |
| Rottweil R 903 | <<locked>> | 84% | 41,989 psi | 85% | 2264 fps | 99.9% |
| Rottweil R 907 | <<locked>> | 86% | 42,540 psi | 86% | 2244 fps | 96.1% |
| Shooters World Long Rifle | <<locked>> | 88% | 43,874 psi | 89% | 2274 fps | 98.3% |
| Shooters World Precision | <<locked>> | 82% | 44,483 psi | 90% | 2267 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 44,440 psi | 90% | 2303 fps | 97.5% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 43,323 psi | 88% | 2316 fps | 99.7% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 44,353 psi | 90% | 2192 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 43,308 psi | 88% | 2228 fps | 96.9% |
| Somchem S355 | <<locked>> | 84% | 42,627 psi | 86% | 2264 fps | 99.8% |
| Somchem S365 | <<locked>> | 94% | 43,120 psi | 87% | 2365 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 42,931 psi | 87% | 2313 fps | 96.3% |
| Vihtavuori N150 | <<locked>> | 86% | 43,468 psi | 88% | 2251 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 44,295 psi | 90% | 2316 fps | 99.2% |
| Vihtavuori N550 | <<locked>> | 90% | 43,598 psi | 88% | 2323 fps | 99% |
| Vihtavuori N555 | <<locked>> | 98% | 42,177 psi | 86% | 2362 fps | 99.5% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 43,845 psi | 89% | 2297 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 42,482 psi | 86% | 2323 fps | 96.9% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 36,579 psi | 74% | 2369 fps | 100% |
Start Load - Barrel Length: 23.62"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 94% | 35,012 psi | 71% | 2178 fps | 95.7% |
| Accurate 4064 | <<locked>> | 80% | 41,075 psi | 83% | 2221 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 30,327 psi | 62% | 2087 fps | 96% |
| ADI AR 2208 | <<locked>> | 80% | 39,610 psi | 80% | 2192 fps | 98.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 39,537 psi | 80% | 2215 fps | 99.8% |
| Alliant Reloder-16 | <<locked>> | 80% | 30,850 psi | 63% | 2100 fps | 96.1% |
| Alliant Reloder-17 | <<locked>> | 80% | 34,098 psi | 69% | 2205 fps | 98.9% |
| Alliant Reloder-23 | <<locked>> | 86% | 26,672 psi | 54% | 2024 fps | 95.8% |
| Alliant Reloder-25 | <<locked>> | 98% | 33,881 psi | 69% | 2208 fps | 95.4% |
| Alliant Reloder-26 | <<locked>> | 90% | 32,285 psi | 65% | 2224 fps | 96% |
| Bofors RP3 | <<locked>> | 80% | 39,378 psi | 80% | 2224 fps | 99.8% |
| Bofors RP7 | <<locked>> | 84% | 40,205 psi | 82% | 2201 fps | 95.5% |
| Hodgdon H380 | <<locked>> | 80% | 39,885 psi | 81% | 2224 fps | 98.2% |
| Hodgdon H414 | <<locked>> | 84% | 37,043 psi | 75% | 2221 fps | 95.3% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 28,181 psi | 57% | 2011 fps | 96.9% |
| Hodgdon Superformance | <<locked>> | 86% | 39,030 psi | 79% | 2283 fps | 95.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,629 psi | 54% | 1296 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 41,626 psi | 84% | 2221 fps | 99.4% |
| IMR 4350 | <<locked>> | 88% | 40,190 psi | 82% | 2224 fps | 95.5% |
| IMR 4451 Enduron | <<locked>> | 82% | 39,073 psi | 79% | 2182 fps | 95.6% |
| IMR 4831 | <<locked>> | 80% | 29,399 psi | 60% | 2051 fps | 95.6% |
| Lovex S062 | <<locked>> | 80% | 41,698 psi | 85% | 2224 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 34,316 psi | 70% | 2096 fps | 95.7% |
| Lovex S070 | <<locked>> | 84% | 36,738 psi | 75% | 2162 fps | 95.3% |
| Lovex S071 | <<locked>> | 98% | 33,475 psi | 68% | 2149 fps | 95.2% |
| Norma 203B | <<locked>> | 80% | 41,814 psi | 85% | 2260 fps | 99.6% |
| Norma MRP | <<locked>> | 94% | 37,391 psi | 76% | 2300 fps | 95% |
| Norma URP | <<locked>> | 80% | 30,734 psi | 62% | 2087 fps | 95.9% |
| Ramshot Big Game | <<locked>> | 80% | 41,379 psi | 84% | 2277 fps | 99.5% |
| Ramshot Hunter | <<locked>> | 84% | 34,142 psi | 69% | 2169 fps | 95.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,224 psi | 55% | 1332 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 40,321 psi | 82% | 2211 fps | 96.8% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 36,260 psi | 74% | 2257 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 30,052 psi | 61% | 2100 fps | 95.3% |
| ReloadSwiss RS 70 | <<locked>> | 82% | 32,039 psi | 65% | 2149 fps | 95.2% |
| Rottweil R 903 | <<locked>> | 80% | 37,014 psi | 75% | 2175 fps | 99.4% |
| Rottweil R 907 | <<locked>> | 84% | 40,205 psi | 82% | 2201 fps | 95.5% |
| Shooters World Long Rifle | <<locked>> | 80% | 34,316 psi | 70% | 2096 fps | 95.7% |
| Shooters World Precision | <<locked>> | 80% | 41,698 psi | 85% | 2224 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 36,738 psi | 75% | 2162 fps | 95.3% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 37,782 psi | 77% | 2218 fps | 99.1% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 39,407 psi | 80% | 2116 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 38,014 psi | 77% | 2136 fps | 95.5% |
| Somchem S355 | <<locked>> | 80% | 37,710 psi | 76% | 2178 fps | 99.4% |
| Somchem S365 | <<locked>> | 80% | 27,528 psi | 56% | 2051 fps | 98.1% |
| Somchem S385 | <<locked>> | 94% | 40,205 psi | 82% | 2267 fps | 95.5% |
| Vihtavuori N150 | <<locked>> | 80% | 35,911 psi | 73% | 2123 fps | 99.7% |
| Vihtavuori N160 | <<locked>> | 80% | 32,053 psi | 65% | 2090 fps | 96.3% |
| Vihtavuori N550 | <<locked>> | 80% | 31,372 psi | 64% | 2087 fps | 95.8% |
| Vihtavuori N555 | <<locked>> | 84% | 26,789 psi | 54% | 2041 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 31,705 psi | 64% | 2070 fps | 98.3% |
| Winchester 760 | <<locked>> | 84% | 37,318 psi | 76% | 2228 fps | 95.4% |
| Winchester StaBALL HD | <<locked>> | 88% | 25,034 psi | 51% | 2041 fps | 95.1% |
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 53 powders for 7 x 57 R loaded with the .284 | 184gr | Berger F-Open Hybrid Target. Alliant Reloder-26 delivers the highest muzzle velocity at 2,438 fps; across all powders the maximum-charge window runs from 1,453 fps to 2,438 fps. Accurate 3100 gives the best case fill at 100 %, and 53 of the 53 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (340 MPa), the top charges use 72–90 %, leaving at least 10 % headroom. The 184.0 gr projectile in 0.284" calls for a 1:9.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Alliant Reloder-23, Alliant Reloder-25 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. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.