Load Specifications
Load data in caliber 7 x 57 R with .284 | 160gr | Barnes XLC S bullet and 34 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% | 43,729 psi | 89% | 2487 fps | 96.7% |
| Accurate 4350 | <<locked>> | 90% | 43,337 psi | 88% | 2497 fps | 98.3% |
| ADI AR 2208 | <<locked>> | 82% | 42,772 psi | 87% | 2405 fps | 98.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 42,888 psi | 87% | 2434 fps | 99.6% |
| Alliant Reloder-16 | <<locked>> | 92% | 44,527 psi | 90% | 2543 fps | 98.8% |
| Alliant Reloder-17 | <<locked>> | 86% | 42,047 psi | 85% | 2520 fps | 99.4% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 41,162 psi | 83% | 2507 fps | 99.2% |
| Alliant Reloder-26 | <<locked>> | 98% | 42,786 psi | 87% | 2598 fps | 97.9% |
| Bofors RP3 | <<locked>> | 82% | 42,989 psi | 87% | 2444 fps | 99.6% |
| Hodgdon H380 | <<locked>> | 82% | 43,468 psi | 88% | 2441 fps | 97.8% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 44,034 psi | 89% | 2484 fps | 99.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,085 psi | 73% | 1581 fps | 100% |
| IMR 4831 | <<locked>> | 92% | 44,106 psi | 89% | 2497 fps | 98.5% |
| Lovex S065 | <<locked>> | 88% | 44,614 psi | 90% | 2441 fps | 97.2% |
| Norma URP | <<locked>> | 90% | 42,641 psi | 86% | 2484 fps | 98.1% |
| Ramshot Big Game | <<locked>> | 82% | 44,527 psi | 90% | 2493 fps | 99.2% |
| Ramshot Hunter | <<locked>> | 92% | 44,208 psi | 90% | 2520 fps | 96.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,680 psi | 74% | 1617 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 43,511 psi | 88% | 2421 fps | 96.2% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 41,829 psi | 85% | 2523 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 42,496 psi | 86% | 2510 fps | 97.9% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 42,148 psi | 85% | 2513 fps | 97.2% |
| Rottweil R 903 | <<locked>> | 84% | 43,134 psi | 87% | 2441 fps | 99.5% |
| Shooters World Long Rifle | <<locked>> | 88% | 44,614 psi | 90% | 2441 fps | 97.2% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 43,555 psi | 88% | 2484 fps | 99.1% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 42,322 psi | 86% | 2323 fps | 100% |
| Somchem S355 | <<locked>> | 84% | 43,729 psi | 89% | 2441 fps | 99.5% |
| Somchem S365 | <<locked>> | 94% | 43,526 psi | 88% | 2539 fps | 100% |
| Vihtavuori N150 | <<locked>> | 86% | 44,077 psi | 89% | 2421 fps | 99.9% |
| Vihtavuori N160 | <<locked>> | 90% | 44,541 psi | 90% | 2480 fps | 98.3% |
| Vihtavuori N550 | <<locked>> | 90% | 43,932 psi | 89% | 2487 fps | 98.1% |
| Vihtavuori N555 | <<locked>> | 98% | 42,540 psi | 86% | 2533 fps | 98.7% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 44,251 psi | 90% | 2461 fps | 99.6% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 37,333 psi | 76% | 2523 fps | 99.3% |
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>> | 96% | 38,450 psi | 78% | 2388 fps | 95.2% |
| Accurate 4350 | <<locked>> | 82% | 33,750 psi | 68% | 2303 fps | 95.7% |
| ADI AR 2208 | <<locked>> | 80% | 40,364 psi | 82% | 2359 fps | 98.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 40,190 psi | 82% | 2382 fps | 99.2% |
| Alliant Reloder-16 | <<locked>> | 82% | 33,533 psi | 68% | 2303 fps | 95.5% |
| Alliant Reloder-17 | <<locked>> | 80% | 34,983 psi | 71% | 2365 fps | 97.9% |
| Alliant Reloder-23 | <<locked>> | 88% | 29,573 psi | 60% | 2228 fps | 95.4% |
| Alliant Reloder-26 | 46 gr | 92% | 35,375 psi | 72% | 2431 fps | 95.3% |
| Bofors RP3 | <<locked>> | 80% | 40,553 psi | 82% | 2398 fps | 99.3% |
| Hodgdon H380 | <<locked>> | 80% | 41,002 psi | 83% | 2395 fps | 97.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 29,298 psi | 59% | 2169 fps | 95.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,166 psi | 55% | 1414 fps | 100% |
| IMR 4831 | <<locked>> | 82% | 32,503 psi | 66% | 2257 fps | 95.2% |
| Lovex S065 | <<locked>> | 82% | 37,434 psi | 76% | 2300 fps | 95.2% |
| Norma URP | <<locked>> | 82% | 33,750 psi | 68% | 2297 fps | 95.4% |
| Ramshot Big Game | <<locked>> | 80% | 41,771 psi | 85% | 2444 fps | 98.8% |
| Ramshot Hunter | <<locked>> | 88% | 39,247 psi | 80% | 2421 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,514 psi | 56% | 1444 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 40,901 psi | 83% | 2372 fps | 95.5% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 37,028 psi | 75% | 2425 fps | 99.9% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 35,259 psi | 72% | 2359 fps | 95.8% |
| ReloadSwiss RS 70 | 42.6 gr | 86% | 37,173 psi | 75% | 2405 fps | 95.4% |
| Rottweil R 903 | <<locked>> | 80% | 38,101 psi | 77% | 2346 fps | 98.8% |
| Shooters World Long Rifle | <<locked>> | 82% | 37,434 psi | 76% | 2300 fps | 95.2% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 38,551 psi | 78% | 2385 fps | 98.2% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 39,827 psi | 81% | 2280 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 38,667 psi | 78% | 2346 fps | 98.7% |
| Somchem S365 | 37 gr | 80% | 28,703 psi | 58% | 2208 fps | 97% |
| Vihtavuori N150 | <<locked>> | 80% | 36,753 psi | 75% | 2287 fps | 99.2% |
| Vihtavuori N160 | <<locked>> | 80% | 32,851 psi | 67% | 2244 fps | 95% |
| Vihtavuori N550 | <<locked>> | 82% | 34,548 psi | 70% | 2297 fps | 95.4% |
| Vihtavuori N555 | <<locked>> | 88% | 31,807 psi | 65% | 2303 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 32,619 psi | 66% | 2224 fps | 97.2% |
| Winchester StaBALL HD | <<locked>> | 92% | 29,544 psi | 60% | 2300 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 34 powders for 7 x 57 R loaded with the .284 | 160gr | Barnes XLC S. Alliant Reloder-26 delivers the highest muzzle velocity at 2,598 fps; across all powders the maximum-charge window runs from 1,581 fps to 2,598 fps. Accurate 3100 gives the best case fill at 100 %, and 34 of the 34 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 160.0 gr projectile in 0.284" calls for a 1:10.0 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 | 160gr | Barnes XLC 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.