Load Specifications
Load data in caliber 7 x 57 R with .284 | 175gr | Speer TBBC bullet and 50 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, Somchem S365 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 3100ᴾ | <<locked>> | 100% | 42,946 psi | 87% | 2392 fps | 97.6% |
| Accurate 4064 | <<locked>> | 82% | 43,990 psi | 89% | 2339 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 42,714 psi | 87% | 2398 fps | 99% |
| ADI AR 2208 | <<locked>> | 82% | 42,395 psi | 86% | 2313 fps | 99.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 42,279 psi | 86% | 2336 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 92% | 44,556 psi | 90% | 2454 fps | 99.5% |
| Alliant Reloder-17 | <<locked>> | 88% | 44,527 psi | 90% | 2474 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 40,930 psi | 83% | 2418 fps | 99.8% |
| Alliant Reloder-26 | <<locked>> | 98% | 42,685 psi | 87% | 2513 fps | 98.9% |
| Bofors RP3 | <<locked>> | 82% | 42,047 psi | 85% | 2339 fps | 99.9% |
| Bofors RP7 | <<locked>> | 86% | 42,685 psi | 87% | 2316 fps | 95.8% |
| Hodgdon H380 | <<locked>> | 82% | 42,728 psi | 87% | 2346 fps | 98.5% |
| Hodgdon H414 | <<locked>> | 88% | 42,337 psi | 86% | 2392 fps | 96.5% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 43,947 psi | 89% | 2392 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,897 psi | 73% | 1509 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 44,570 psi | 90% | 2343 fps | 99.5% |
| IMR 4350 | <<locked>> | 90% | 42,685 psi | 87% | 2339 fps | 95.9% |
| IMR 4451 Enduron | <<locked>> | 86% | 44,121 psi | 89% | 2343 fps | 96.7% |
| IMR 4831 | <<locked>> | 92% | 43,540 psi | 88% | 2398 fps | 99.1% |
| Lovex S062 | <<locked>> | 82% | 44,295 psi | 90% | 2336 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 43,947 psi | 89% | 2346 fps | 98% |
| Lovex S070 | <<locked>> | 90% | 44,338 psi | 90% | 2372 fps | 97.1% |
| Norma 203B | <<locked>> | 82% | 44,585 psi | 90% | 2382 fps | 99.8% |
| Norma MRP | <<locked>> | 98% | 42,554 psi | 86% | 2470 fps | 96.4% |
| Norma URP | <<locked>> | 90% | 42,409 psi | 86% | 2392 fps | 98.8% |
| Ramshot Big Game | <<locked>> | 82% | 44,135 psi | 90% | 2395 fps | 99.7% |
| Ramshot Hunter | <<locked>> | 92% | 44,121 psi | 89% | 2434 fps | 97.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,434 psi | 74% | 1549 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 43,047 psi | 87% | 2329 fps | 97.2% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 44,541 psi | 90% | 2477 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 42,337 psi | 86% | 2418 fps | 98.7% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 41,959 psi | 85% | 2431 fps | 98.2% |
| Rottweil R 903 | <<locked>> | 84% | 42,221 psi | 86% | 2339 fps | 99.8% |
| Rottweil R 907 | <<locked>> | 86% | 42,685 psi | 87% | 2316 fps | 95.8% |
| Shooters World Long Rifle | <<locked>> | 88% | 43,947 psi | 89% | 2346 fps | 98% |
| Shooters World Precision | <<locked>> | 82% | 44,295 psi | 90% | 2336 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 44,338 psi | 90% | 2372 fps | 97.1% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 43,352 psi | 88% | 2388 fps | 99.6% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 44,512 psi | 90% | 2267 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 43,236 psi | 88% | 2297 fps | 96.6% |
| Somchem S355 | <<locked>> | 84% | 42,960 psi | 87% | 2343 fps | 99.8% |
| Somchem S365 | <<locked>> | 94% | 43,424 psi | 88% | 2444 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 42,989 psi | 87% | 2382 fps | 95.9% |
| Vihtavuori N150 | <<locked>> | 86% | 43,584 psi | 88% | 2323 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 44,440 psi | 90% | 2392 fps | 99.1% |
| Vihtavuori N550 | <<locked>> | 90% | 43,685 psi | 89% | 2395 fps | 98.8% |
| Vihtavuori N555 | <<locked>> | 98% | 42,337 psi | 86% | 2438 fps | 99.4% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 43,918 psi | 89% | 2369 fps | 99.9% |
| Winchester 760 | <<locked>> | 88% | 42,337 psi | 86% | 2392 fps | 96.5% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 36,579 psi | 74% | 2438 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% | 34,969 psi | 71% | 2244 fps | 95.3% |
| Accurate 4064 | <<locked>> | 80% | 40,988 psi | 83% | 2290 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 30,385 psi | 62% | 2152 fps | 95.6% |
| ADI AR 2208 | <<locked>> | 80% | 39,871 psi | 81% | 2267 fps | 98.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 39,421 psi | 80% | 2283 fps | 99.6% |
| Alliant Reloder-16 | <<locked>> | 80% | 30,806 psi | 62% | 2162 fps | 95.7% |
| Alliant Reloder-17 | <<locked>> | 80% | 34,243 psi | 69% | 2274 fps | 98.7% |
| Alliant Reloder-23 | <<locked>> | 86% | 26,789 psi | 54% | 2087 fps | 95.4% |
| Alliant Reloder-26 | 44.7 gr | 90% | 32,343 psi | 66% | 2287 fps | 95.5% |
| Bofors RP3 | <<locked>> | 80% | 39,450 psi | 80% | 2297 fps | 99.7% |
| Bofors RP7 | <<locked>> | 84% | 40,161 psi | 81% | 2270 fps | 95.1% |
| Hodgdon H380 | <<locked>> | 80% | 40,190 psi | 82% | 2300 fps | 98% |
| Hodgdon H414 | <<locked>> | 86% | 39,755 psi | 81% | 2343 fps | 95.8% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 28,152 psi | 57% | 2073 fps | 96.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,818 psi | 54% | 1348 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 41,872 psi | 85% | 2297 fps | 99.2% |
| IMR 4350 | <<locked>> | 88% | 40,161 psi | 81% | 2293 fps | 95.1% |
| IMR 4451 Enduron | <<locked>> | 82% | 39,131 psi | 79% | 2251 fps | 95.3% |
| IMR 4831 | <<locked>> | 80% | 29,501 psi | 60% | 2116 fps | 95.2% |
| Lovex S062 | <<locked>> | 80% | 41,669 psi | 85% | 2293 fps | 99.9% |
| Lovex S065 | <<locked>> | 80% | 34,258 psi | 69% | 2159 fps | 95.3% |
| Lovex S070 | <<locked>> | 84% | 36,927 psi | 75% | 2234 fps | 95% |
| Norma 203B | <<locked>> | 80% | 41,916 psi | 85% | 2336 fps | 99.5% |
| Norma MRP | <<locked>> | 96% | 40,030 psi | 81% | 2421 fps | 95.5% |
| Norma URP | <<locked>> | 80% | 30,603 psi | 62% | 2149 fps | 95.4% |
| Ramshot Big Game | <<locked>> | 80% | 41,481 psi | 84% | 2349 fps | 99.4% |
| Ramshot Hunter | <<locked>> | 86% | 36,303 psi | 74% | 2283 fps | 95.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,108 psi | 55% | 1378 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 40,277 psi | 82% | 2280 fps | 96.5% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 36,419 psi | 74% | 2329 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 32,155 psi | 65% | 2215 fps | 95.8% |
| ReloadSwiss RS 70 | 41.3 gr | 84% | 34,287 psi | 70% | 2267 fps | 95.7% |
| Rottweil R 903 | <<locked>> | 80% | 36,883 psi | 75% | 2244 fps | 99.2% |
| Rottweil R 907 | <<locked>> | 84% | 40,161 psi | 81% | 2270 fps | 95.1% |
| Shooters World Long Rifle | <<locked>> | 80% | 34,258 psi | 69% | 2159 fps | 95.3% |
| Shooters World Precision | <<locked>> | 80% | 41,669 psi | 85% | 2293 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 84% | 36,927 psi | 75% | 2234 fps | 95% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 38,014 psi | 77% | 2293 fps | 98.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 39,189 psi | 79% | 2182 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 38,174 psi | 77% | 2205 fps | 95.2% |
| Somchem S355 | <<locked>> | 80% | 37,637 psi | 76% | 2244 fps | 99.2% |
| Somchem S365 | 36.7 gr | 80% | 27,441 psi | 56% | 2110 fps | 97.7% |
| Somchem S385 | <<locked>> | 94% | 40,379 psi | 82% | 2336 fps | 95.2% |
| Vihtavuori N150 | <<locked>> | 80% | 35,824 psi | 73% | 2188 fps | 99.6% |
| Vihtavuori N160 | <<locked>> | 80% | 32,126 psi | 65% | 2156 fps | 96% |
| Vihtavuori N550 | <<locked>> | 80% | 31,618 psi | 64% | 2156 fps | 95.5% |
| Vihtavuori N555 | <<locked>> | 86% | 28,558 psi | 58% | 2149 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 31,763 psi | 64% | 2136 fps | 98% |
| Winchester 760 | <<locked>> | 84% | 37,362 psi | 76% | 2297 fps | 95% |
| Winchester StaBALL HD | <<locked>> | 90% | 26,600 psi | 54% | 2152 fps | 95.8% |
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 50 powders for 7 x 57 R loaded with the .284 | 175gr | Speer TBBC. Alliant Reloder-26 delivers the highest muzzle velocity at 2,513 fps; across all powders the maximum-charge window runs from 1,509 fps to 2,513 fps. Accurate 3100 gives the best case fill at 100 %, and 50 of the 50 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 175.0 gr projectile in 0.284" calls for a 1:10.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, Alliant Reloder-23, 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, Somchem S365, ReloadSwiss RS 70 rank at the top here: for 7 x 57 R with the .284 | 175gr | Speer TBBC 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.