Load Specifications
Load data in caliber 7 x 57 R with .284 | 173gr | Sellier & Bellot SPCE 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, ReloadSwiss RS 70 and Alliant Reloder-16.
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% | 44,541 psi | 90% | 2441 fps | 98% |
| Accurate 4350 | <<locked>> | 90% | 44,092 psi | 89% | 2448 fps | 99.2% |
| ADI AR 2208 | <<locked>> | 82% | 43,294 psi | 88% | 2356 fps | 99.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 43,250 psi | 88% | 2375 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 90% | 42,844 psi | 87% | 2451 fps | 99.3% |
| Alliant Reloder-17 | <<locked>> | 86% | 43,018 psi | 87% | 2474 fps | 99.9% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 42,090 psi | 85% | 2464 fps | 99.9% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 37,130 psi | 75% | 2375 fps | 96.6% |
| Alliant Reloder-26 | <<locked>> | 98% | 43,990 psi | 89% | 2566 fps | 99.2% |
| Bofors RP3 | <<locked>> | 82% | 43,265 psi | 88% | 2385 fps | 100% |
| Bofors RP7 | <<locked>> | 86% | 43,685 psi | 89% | 2359 fps | 96.2% |
| Hodgdon H380 | <<locked>> | 82% | 43,845 psi | 89% | 2392 fps | 98.8% |
| Hodgdon H414 | <<locked>> | 88% | 43,555 psi | 88% | 2438 fps | 97% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 42,482 psi | 86% | 2395 fps | 99.8% |
| Hodgdon Superformance | <<locked>> | 88% | 43,076 psi | 87% | 2457 fps | 96.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,810 psi | 73% | 1532 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 43,801 psi | 89% | 2385 fps | 96.3% |
| IMR 4451 Enduron | <<locked>> | 84% | 42,554 psi | 86% | 2343 fps | 96.4% |
| IMR 4831 | <<locked>> | 90% | 42,148 psi | 85% | 2398 fps | 99% |
| Lovex S065 | <<locked>> | 86% | 42,424 psi | 86% | 2346 fps | 97.8% |
| Lovex S070 | <<locked>> | 88% | 42,960 psi | 87% | 2375 fps | 96.9% |
| Lovex S071ᴾ | <<locked>> | 100% | 37,072 psi | 75% | 2310 fps | 96.2% |
| Norma MRP | <<locked>> | 98% | 43,932 psi | 89% | 2523 fps | 96.9% |
| Norma URP | <<locked>> | 90% | 43,714 psi | 89% | 2438 fps | 99.1% |
| Ramshot Hunter | <<locked>> | 90% | 42,598 psi | 86% | 2431 fps | 97.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,347 psi | 74% | 1568 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 44,063 psi | 89% | 2375 fps | 97.5% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 42,801 psi | 87% | 2474 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 43,526 psi | 88% | 2464 fps | 99% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 43,149 psi | 88% | 2480 fps | 98.6% |
| Rottweil R 903 | <<locked>> | 84% | 43,439 psi | 88% | 2382 fps | 99.9% |
| Rottweil R 907 | <<locked>> | 86% | 43,685 psi | 89% | 2359 fps | 96.2% |
| Shooters World Long Rifle | <<locked>> | 86% | 42,424 psi | 86% | 2346 fps | 97.8% |
| Shooters World SW4350 | <<locked>> | 88% | 42,960 psi | 87% | 2375 fps | 96.9% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 44,425 psi | 90% | 2431 fps | 99.8% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 42,757 psi | 87% | 2264 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 44,469 psi | 90% | 2343 fps | 97% |
| Somchem S355 | <<locked>> | 84% | 43,816 psi | 89% | 2382 fps | 99.9% |
| Somchem S365 | <<locked>> | 92% | 41,930 psi | 85% | 2444 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 44,280 psi | 90% | 2431 fps | 96.4% |
| Vihtavuori N150 | <<locked>> | 84% | 42,032 psi | 85% | 2323 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 42,714 psi | 87% | 2388 fps | 98.9% |
| Vihtavuori N550 | <<locked>> | 88% | 41,989 psi | 85% | 2392 fps | 98.6% |
| Vihtavuori N555 | <<locked>> | 98% | 43,830 psi | 89% | 2487 fps | 99.6% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 42,264 psi | 86% | 2365 fps | 99.9% |
| Winchester 760 | <<locked>> | 88% | 43,830 psi | 89% | 2444 fps | 97% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 37,724 psi | 77% | 2490 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% | 33,837 psi | 69% | 2244 fps | 95% |
| Accurate 4350 | <<locked>> | 80% | 31,299 psi | 63% | 2195 fps | 96% |
| ADI AR 2208 | <<locked>> | 80% | 40,785 psi | 83% | 2310 fps | 99% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 40,712 psi | 83% | 2333 fps | 99.8% |
| Alliant Reloder-16 | 37.3 gr | 80% | 31,575 psi | 64% | 2205 fps | 96.2% |
| Alliant Reloder-17 | <<locked>> | 80% | 35,201 psi | 71% | 2320 fps | 98.9% |
| Alliant Reloder-23 | <<locked>> | 86% | 27,514 psi | 56% | 2133 fps | 96% |
| Alliant Reloder-25 | <<locked>> | 98% | 34,824 psi | 71% | 2323 fps | 95.6% |
| Alliant Reloder-26 | 45.3 gr | 88% | 31,270 psi | 63% | 2283 fps | 95.1% |
| Bofors RP3 | <<locked>> | 80% | 40,393 psi | 82% | 2336 fps | 99.8% |
| Bofors RP7 | <<locked>> | 84% | 41,205 psi | 84% | 2316 fps | 95.5% |
| Hodgdon H380 | <<locked>> | 80% | 41,017 psi | 83% | 2343 fps | 98.3% |
| Hodgdon H414 | <<locked>> | 84% | 38,043 psi | 77% | 2336 fps | 95.3% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 28,921 psi | 59% | 2116 fps | 96.9% |
| Hodgdon Superformance | <<locked>> | 86% | 40,074 psi | 81% | 2398 fps | 95.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,774 psi | 54% | 1368 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 41,321 psi | 84% | 2343 fps | 95.6% |
| IMR 4451 Enduron | <<locked>> | 82% | 40,147 psi | 81% | 2297 fps | 95.7% |
| IMR 4831 | <<locked>> | 80% | 30,327 psi | 62% | 2156 fps | 95.7% |
| Lovex S065 | <<locked>> | 80% | 35,288 psi | 72% | 2205 fps | 95.8% |
| Lovex S070 | <<locked>> | 84% | 37,956 psi | 77% | 2280 fps | 95.5% |
| Lovex S071 | <<locked>> | 98% | 34,548 psi | 70% | 2257 fps | 95.3% |
| Norma MRP | <<locked>> | 94% | 38,435 psi | 78% | 2415 fps | 95.1% |
| Norma URP | <<locked>> | 80% | 31,647 psi | 64% | 2198 fps | 96% |
| Ramshot Hunter | <<locked>> | 84% | 35,012 psi | 71% | 2277 fps | 95.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,050 psi | 55% | 1398 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 41,278 psi | 84% | 2326 fps | 96.9% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 37,420 psi | 76% | 2372 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 30,908 psi | 63% | 2205 fps | 95.4% |
| ReloadSwiss RS 70 | 41.8 gr | 82% | 32,982 psi | 67% | 2260 fps | 95.3% |
| Rottweil R 903 | <<locked>> | 80% | 38,130 psi | 77% | 2290 fps | 99.4% |
| Rottweil R 907 | <<locked>> | 84% | 41,205 psi | 84% | 2316 fps | 95.5% |
| Shooters World Long Rifle | <<locked>> | 80% | 35,288 psi | 72% | 2205 fps | 95.8% |
| Shooters World SW4350 | <<locked>> | 84% | 37,956 psi | 77% | 2280 fps | 95.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 38,870 psi | 79% | 2333 fps | 99.1% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 40,176 psi | 81% | 2224 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 39,146 psi | 79% | 2247 fps | 95.6% |
| Somchem S355 | <<locked>> | 80% | 38,870 psi | 79% | 2293 fps | 99.4% |
| Somchem S365 | <<locked>> | 80% | 28,384 psi | 58% | 2156 fps | 98.1% |
| Somchem S385 | <<locked>> | 94% | 41,713 psi | 85% | 2385 fps | 95.7% |
| Vihtavuori N150 | <<locked>> | 80% | 36,956 psi | 75% | 2234 fps | 99.8% |
| Vihtavuori N160 | <<locked>> | 80% | 32,953 psi | 67% | 2198 fps | 96.4% |
| Vihtavuori N550 | <<locked>> | 80% | 32,387 psi | 66% | 2198 fps | 95.9% |
| Vihtavuori N555 | <<locked>> | 84% | 27,717 psi | 56% | 2149 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 32,518 psi | 66% | 2175 fps | 98.3% |
| Winchester 760 | <<locked>> | 84% | 38,348 psi | 78% | 2339 fps | 95.4% |
| Winchester StaBALL HD | <<locked>> | 88% | 25,788 psi | 52% | 2146 fps | 95.3% |
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 71 powders for 7 x 57 R loaded with the .284 | 173gr | Sellier & Bellot SPCE. Alliant Reloder-26 delivers the highest muzzle velocity at 2,566 fps; across all powders the maximum-charge window runs from 1,532 fps to 2,566 fps. Accurate 3100 gives the best case fill at 100 %, and 71 of the 71 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 173.0 gr projectile in 0.284" calls for a 1:11.5 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. Alliant Reloder-26, ReloadSwiss RS 70, Alliant Reloder-16 rank at the top here: for 7 x 57 R with the .284 | 173gr | Sellier & Bellot SPCE they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate MAGPRO, ADI AR 2209, ADI AR 2213 burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.