Load Specifications
Load data in caliber 7 x 57 R with .284 | 160gr | Winchester FailSafe bullet and 48 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 70, Alliant Reloder-17 and Alliant Reloder-26.
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% | 41,060 psi | 83% | 2470 fps | 96.3% |
| Accurate 4064 | <<locked>> | 82% | 42,235 psi | 86% | 2434 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 43,859 psi | 89% | 2536 fps | 98.6% |
| ADI AR 2208 | <<locked>> | 84% | 43,511 psi | 88% | 2451 fps | 98.9% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 43,990 psi | 89% | 2582 fps | 99% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 43,482 psi | 88% | 2477 fps | 99.7% |
| Alliant Reloder-15 | <<locked>> | 82% | 43,830 psi | 89% | 2490 fps | 99% |
| Alliant Reloder-16 | <<locked>> | 92% | 42,960 psi | 87% | 2543 fps | 98.7% |
| Alliant Reloder-17 | <<locked>> | 88% | 42,975 psi | 87% | 2569 fps | 99.7% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 39,450 psi | 80% | 2503 fps | 99.1% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 43,816 psi | 89% | 2651 fps | 98.4% |
| Bofors RP3 | <<locked>> | 84% | 43,366 psi | 88% | 2484 fps | 99.7% |
| Hodgdon H380 | <<locked>> | 84% | 44,121 psi | 89% | 2487 fps | 98.2% |
| Hodgdon H414 | <<locked>> | 90% | 43,743 psi | 89% | 2533 fps | 96% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 42,438 psi | 86% | 2487 fps | 99.5% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 44,556 psi | 90% | 2530 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,534 psi | 72% | 1591 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 43,091 psi | 87% | 2434 fps | 99% |
| IMR 4831 | <<locked>> | 92% | 42,003 psi | 85% | 2490 fps | 98.3% |
| Lovex S062 | <<locked>> | 82% | 43,047 psi | 87% | 2438 fps | 99.8% |
| Lovex S065 | <<locked>> | 88% | 42,395 psi | 86% | 2434 fps | 97% |
| Lovex S070 | <<locked>> | 90% | 42,786 psi | 87% | 2461 fps | 95.9% |
| Norma 203B | <<locked>> | 82% | 43,149 psi | 88% | 2477 fps | 99.3% |
| Norma URP | <<locked>> | 92% | 43,613 psi | 88% | 2533 fps | 98.5% |
| Ramshot Big Game | <<locked>> | 82% | 42,612 psi | 86% | 2490 fps | 99.1% |
| Ramshot Hunter | <<locked>> | 92% | 42,496 psi | 86% | 2520 fps | 96.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,013 psi | 73% | 1631 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 41,858 psi | 85% | 2425 fps | 96.1% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 42,859 psi | 87% | 2572 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 43,395 psi | 88% | 2556 fps | 98.3% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 43,410 psi | 88% | 2572 fps | 97.8% |
| Rottweil R 903 | <<locked>> | 86% | 43,236 psi | 88% | 2477 fps | 99.6% |
| Shooters World Long Rifle | <<locked>> | 88% | 42,395 psi | 86% | 2434 fps | 97% |
| Shooters World Precision | <<locked>> | 82% | 43,047 psi | 87% | 2438 fps | 99.8% |
| Shooters World SW4350 | <<locked>> | 90% | 42,786 psi | 87% | 2461 fps | 95.9% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 44,483 psi | 90% | 2530 fps | 99.4% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 43,047 psi | 87% | 2362 fps | 100% |
| Somchem S355 | <<locked>> | 86% | 44,077 psi | 89% | 2480 fps | 99.6% |
| Somchem S365 | <<locked>> | 96% | 44,614 psi | 90% | 2589 fps | 100% |
| Vihtavuori N135 | <<locked>> | 82% | 44,498 psi | 90% | 2428 fps | 100% |
| Vihtavuori N150 | <<locked>> | 86% | 41,989 psi | 85% | 2415 fps | 99.9% |
| Vihtavuori N160 | <<locked>> | 90% | 42,728 psi | 87% | 2480 fps | 98.2% |
| Vihtavuori N540 | <<locked>> | 82% | 43,395 psi | 88% | 2431 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 42,148 psi | 85% | 2487 fps | 97.9% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 43,250 psi | 88% | 2572 fps | 99% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 42,612 psi | 86% | 2461 fps | 99.6% |
| Winchester 760 | <<locked>> | 90% | 43,743 psi | 89% | 2533 fps | 96% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 35,215 psi | 71% | 2507 fps | 99% |
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>> | 98% | 38,493 psi | 78% | 2425 fps | 95.5% |
| Accurate 4064 | <<locked>> | 80% | 39,740 psi | 81% | 2392 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 33,214 psi | 67% | 2326 fps | 95.7% |
| ADI AR 2208 | <<locked>> | 80% | 38,624 psi | 78% | 2359 fps | 97.9% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 41,133 psi | 83% | 2526 fps | 98.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 38,290 psi | 78% | 2379 fps | 99.1% |
| Alliant Reloder-15 | <<locked>> | 80% | 41,017 psi | 83% | 2438 fps | 98.6% |
| Alliant Reloder-16 | <<locked>> | 84% | 33,707 psi | 68% | 2343 fps | 95.9% |
| Alliant Reloder-17 | 40.4 gr | 80% | 33,025 psi | 67% | 2352 fps | 97.5% |
| Alliant Reloder-23 | <<locked>> | 90% | 29,095 psi | 59% | 2254 fps | 95.5% |
| Alliant Reloder-26 | 48.6 gr | 94% | 35,563 psi | 72% | 2474 fps | 95.8% |
| Bofors RP3 | <<locked>> | 80% | 37,840 psi | 77% | 2382 fps | 99.1% |
| Hodgdon H380 | <<locked>> | 80% | 38,566 psi | 78% | 2382 fps | 96.8% |
| Hodgdon H414 | <<locked>> | 88% | 40,930 psi | 83% | 2480 fps | 95.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 27,340 psi | 55% | 2152 fps | 95% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 41,698 psi | 85% | 2480 fps | 99.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,585 psi | 54% | 1424 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 40,567 psi | 82% | 2388 fps | 98.5% |
| IMR 4831 | <<locked>> | 84% | 32,401 psi | 66% | 2290 fps | 95.5% |
| Lovex S062 | <<locked>> | 80% | 40,567 psi | 82% | 2395 fps | 99.6% |
| Lovex S065 | <<locked>> | 84% | 37,695 psi | 76% | 2343 fps | 95.6% |
| Lovex S070 | <<locked>> | 88% | 40,393 psi | 82% | 2415 fps | 95.2% |
| Norma 203B | <<locked>> | 80% | 40,379 psi | 82% | 2425 fps | 98.8% |
| Norma URP | <<locked>> | 84% | 33,707 psi | 68% | 2329 fps | 95.7% |
| Ramshot Big Game | <<locked>> | 80% | 39,871 psi | 81% | 2438 fps | 98.6% |
| Ramshot Hunter | <<locked>> | 90% | 39,842 psi | 81% | 2467 fps | 95.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,832 psi | 54% | 1457 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 39,189 psi | 79% | 2372 fps | 95.2% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 35,128 psi | 71% | 2415 fps | 99.7% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 33,141 psi | 67% | 2346 fps | 95.2% |
| ReloadSwiss RS 70 | 44.1 gr | 86% | 35,505 psi | 72% | 2402 fps | 95.1% |
| Rottweil R 903 | <<locked>> | 80% | 35,723 psi | 72% | 2333 fps | 98.4% |
| Shooters World Long Rifle | <<locked>> | 84% | 37,695 psi | 76% | 2343 fps | 95.6% |
| Shooters World Precision | <<locked>> | 80% | 40,567 psi | 82% | 2395 fps | 99.6% |
| Shooters World SW4350 | <<locked>> | 88% | 40,393 psi | 82% | 2415 fps | 95.2% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 36,651 psi | 74% | 2379 fps | 98% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 38,087 psi | 77% | 2280 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 36,608 psi | 74% | 2339 fps | 98.4% |
| Somchem S365 | <<locked>> | 80% | 26,542 psi | 54% | 2182 fps | 96.2% |
| Vihtavuori N135 | <<locked>> | 80% | 41,800 psi | 85% | 2385 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 34,737 psi | 70% | 2277 fps | 99% |
| Vihtavuori N160 | <<locked>> | 82% | 33,025 psi | 67% | 2283 fps | 95.3% |
| Vihtavuori N540 | <<locked>> | 80% | 40,698 psi | 83% | 2385 fps | 100% |
| Vihtavuori N550 | <<locked>> | 84% | 34,592 psi | 70% | 2333 fps | 95.7% |
| Vihtavuori N555 | <<locked>> | 90% | 31,241 psi | 63% | 2323 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 30,632 psi | 62% | 2208 fps | 96.7% |
| Winchester 760 | <<locked>> | 88% | 40,930 psi | 83% | 2480 fps | 95.2% |
| Winchester StaBALL HD | <<locked>> | 94% | 29,080 psi | 59% | 2323 fps | 96.1% |
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 48 powders for 7 x 57 R loaded with the .284 | 160gr | Winchester FailSafe. Alliant Reloder-26 delivers the highest muzzle velocity at 2,651 fps; across all powders the maximum-charge window runs from 1,591 fps to 2,651 fps. Accurate 3100 gives the best case fill at 100 %, and 48 of the 48 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (340 MPa), the top charges use 71–90 %, leaving at least 10 % headroom. The 160.0 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-26 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. ReloadSwiss RS 70, Alliant Reloder-17, Alliant Reloder-26 rank at the top here: for 7 x 57 R with the .284 | 160gr | Winchester FailSafe 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.