Load Specifications
Load data in caliber 7 x 57 R with .284 | 165gr | Remington SP Core-Lokt bullet and 44 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 ReloadSwiss RS 62.
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% | 44,179 psi | 90% | 2500 fps | 97.6% |
| Accurate 4350 | <<locked>> | 90% | 43,497 psi | 88% | 2503 fps | 98.9% |
| ADI AR 2208 | <<locked>> | 82% | 42,989 psi | 87% | 2415 fps | 99.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 42,830 psi | 87% | 2434 fps | 99.8% |
| Alliant Reloder-16 | <<locked>> | 90% | 42,699 psi | 87% | 2513 fps | 99% |
| Alliant Reloder-17 | <<locked>> | 86% | 42,496 psi | 86% | 2533 fps | 99.8% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 41,829 psi | 85% | 2523 fps | 99.7% |
| Alliant Reloder-26 | <<locked>> | 98% | 43,685 psi | 89% | 2625 fps | 98.9% |
| Bofors RP3 | <<locked>> | 82% | 42,757 psi | 87% | 2444 fps | 99.9% |
| Bofors RP7 | <<locked>> | 86% | 43,424 psi | 88% | 2421 fps | 95.8% |
| Hodgdon H380 | <<locked>> | 82% | 43,642 psi | 89% | 2451 fps | 98.5% |
| Hodgdon H414 | <<locked>> | 88% | 43,279 psi | 88% | 2500 fps | 96.5% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 42,018 psi | 85% | 2454 fps | 99.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,752 psi | 73% | 1581 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 43,627 psi | 88% | 2448 fps | 95.9% |
| IMR 4451 Enduron | <<locked>> | 84% | 42,380 psi | 86% | 2402 fps | 96% |
| IMR 4831 | <<locked>> | 92% | 44,483 psi | 90% | 2503 fps | 99.1% |
| Lovex S065 | <<locked>> | 88% | 44,614 psi | 90% | 2448 fps | 98% |
| Lovex S070 | <<locked>> | 88% | 42,598 psi | 86% | 2431 fps | 96.5% |
| Norma MRP | <<locked>> | 98% | 43,714 psi | 89% | 2585 fps | 96.4% |
| Norma URP | <<locked>> | 90% | 43,178 psi | 88% | 2493 fps | 98.8% |
| Ramshot Hunter | <<locked>> | 90% | 42,206 psi | 86% | 2487 fps | 97.1% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,521 psi | 74% | 1624 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 43,743 psi | 89% | 2434 fps | 97.1% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 42,380 psi | 86% | 2533 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 43,033 psi | 87% | 2520 fps | 98.6% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 42,685 psi | 87% | 2536 fps | 98.2% |
| Rottweil R 903 | <<locked>> | 84% | 42,902 psi | 87% | 2441 fps | 99.8% |
| Rottweil R 907 | <<locked>> | 86% | 43,424 psi | 88% | 2421 fps | 95.8% |
| Shooters World Long Rifle | <<locked>> | 88% | 44,614 psi | 90% | 2448 fps | 98% |
| Shooters World SW4350 | <<locked>> | 88% | 42,598 psi | 86% | 2431 fps | 96.5% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 44,034 psi | 89% | 2490 fps | 99.6% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 42,496 psi | 86% | 2326 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 44,048 psi | 89% | 2398 fps | 96.6% |
| Somchem S355 | <<locked>> | 84% | 43,671 psi | 89% | 2444 fps | 99.8% |
| Somchem S365 | <<locked>> | 94% | 44,222 psi | 90% | 2549 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 44,005 psi | 89% | 2490 fps | 95.9% |
| Vihtavuori N150 | <<locked>> | 86% | 44,382 psi | 90% | 2428 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 42,264 psi | 86% | 2444 fps | 98.5% |
| Vihtavuori N550 | <<locked>> | 90% | 44,498 psi | 90% | 2500 fps | 98.8% |
| Vihtavuori N555 | <<locked>> | 98% | 43,279 psi | 88% | 2543 fps | 99.3% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 41,887 psi | 85% | 2425 fps | 99.7% |
| Winchester 760 | <<locked>> | 88% | 43,279 psi | 88% | 2500 fps | 96.5% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 37,507 psi | 76% | 2546 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% | 35,911 psi | 73% | 2346 fps | 95.3% |
| Accurate 4350 | <<locked>> | 80% | 30,951 psi | 63% | 2244 fps | 95.4% |
| ADI AR 2208 | <<locked>> | 80% | 40,292 psi | 82% | 2365 fps | 98.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 40,132 psi | 81% | 2385 fps | 99.6% |
| Alliant Reloder-16 | <<locked>> | 80% | 31,328 psi | 64% | 2257 fps | 95.6% |
| Alliant Reloder-17 | <<locked>> | 80% | 34,751 psi | 70% | 2372 fps | 98.5% |
| Alliant Reloder-23 | <<locked>> | 86% | 27,166 psi | 55% | 2175 fps | 95.2% |
| Alliant Reloder-26 | 47.8 gr | 90% | 33,185 psi | 67% | 2388 fps | 95.5% |
| Bofors RP3 | <<locked>> | 80% | 40,016 psi | 81% | 2395 fps | 99.6% |
| Bofors RP7 | <<locked>> | 84% | 40,741 psi | 83% | 2369 fps | 95% |
| Hodgdon H380 | <<locked>> | 80% | 40,582 psi | 82% | 2395 fps | 97.9% |
| Hodgdon H414 | <<locked>> | 86% | 40,538 psi | 82% | 2448 fps | 95.7% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 28,718 psi | 58% | 2165 fps | 96.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,716 psi | 54% | 1411 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 40,930 psi | 83% | 2398 fps | 95.1% |
| IMR 4451 Enduron | <<locked>> | 82% | 39,798 psi | 81% | 2352 fps | 95.2% |
| IMR 4831 | <<locked>> | 80% | 30,023 psi | 61% | 2208 fps | 95.1% |
| Lovex S065 | <<locked>> | 80% | 34,838 psi | 71% | 2257 fps | 95.2% |
| Lovex S070 | <<locked>> | 86% | 39,987 psi | 81% | 2382 fps | 95.7% |
| Norma MRP | <<locked>> | 96% | 40,727 psi | 83% | 2523 fps | 95.4% |
| Norma URP | <<locked>> | 80% | 31,386 psi | 64% | 2247 fps | 95.4% |
| Ramshot Hunter | <<locked>> | 86% | 36,956 psi | 75% | 2382 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,224 psi | 55% | 1447 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 41,075 psi | 83% | 2385 fps | 96.4% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 36,985 psi | 75% | 2428 fps | 100% |
| ReloadSwiss RS 62 | 42.4 gr | 82% | 32,779 psi | 66% | 2310 fps | 95.7% |
| ReloadSwiss RS 70 | 44.2 gr | 84% | 35,041 psi | 71% | 2369 fps | 95.7% |
| Rottweil R 903 | <<locked>> | 80% | 37,811 psi | 77% | 2346 fps | 99.2% |
| Rottweil R 907 | <<locked>> | 84% | 40,741 psi | 83% | 2369 fps | 95% |
| Shooters World Long Rifle | <<locked>> | 80% | 34,838 psi | 71% | 2257 fps | 95.2% |
| Shooters World SW4350 | <<locked>> | 86% | 39,987 psi | 81% | 2382 fps | 95.7% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 38,682 psi | 78% | 2392 fps | 98.8% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 39,784 psi | 81% | 2283 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 38,667 psi | 78% | 2300 fps | 95.1% |
| Somchem S355 | <<locked>> | 80% | 38,334 psi | 78% | 2346 fps | 99.1% |
| Somchem S365 | <<locked>> | 80% | 28,108 psi | 57% | 2205 fps | 97.6% |
| Somchem S385 | <<locked>> | 94% | 41,278 psi | 84% | 2441 fps | 95.1% |
| Vihtavuori N150 | <<locked>> | 80% | 36,680 psi | 74% | 2290 fps | 99.6% |
| Vihtavuori N160 | <<locked>> | 80% | 32,634 psi | 66% | 2247 fps | 95.8% |
| Vihtavuori N550 | <<locked>> | 80% | 32,024 psi | 65% | 2247 fps | 95.3% |
| Vihtavuori N555 | <<locked>> | 86% | 29,225 psi | 59% | 2244 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 32,256 psi | 65% | 2228 fps | 97.9% |
| Winchester 760 | <<locked>> | 86% | 40,538 psi | 82% | 2448 fps | 95.7% |
| Winchester StaBALL HD | <<locked>> | 90% | 27,224 psi | 55% | 2251 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 44 powders for 7 x 57 R loaded with the .284 | 165gr | Remington SP Core-Lokt. Alliant Reloder-26 delivers the highest muzzle velocity at 2,625 fps; across all powders the maximum-charge window runs from 1,581 fps to 2,625 fps. Accurate 3100 gives the best case fill at 100 %, and 44 of the 44 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 165.0 gr projectile in 0.284" calls for a 1:12.5 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, ReloadSwiss RS 70, ReloadSwiss RS 62 rank at the top here: for 7 x 57 R with the .284 | 165gr | Remington SP Core-Lokt 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.