Load Specifications
Load data in caliber 7 x 57 R with .284 | 150gr | Remington PSP Core-Lokt bullet and 47 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Somchem S365, Alliant Reloder-17 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 2495 | <<locked>> | 82% | 43,598 psi | 88% | 2510 fps | 100% |
| Accurate 4064 | <<locked>> | 84% | 43,714 psi | 89% | 2549 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 42,496 psi | 86% | 2598 fps | 97.9% |
| ADI AR 2208 | <<locked>> | 84% | 42,598 psi | 86% | 2520 fps | 98.3% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 43,047 psi | 87% | 2651 fps | 98.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 42,163 psi | 86% | 2539 fps | 99.3% |
| Alliant Reloder-15 | <<locked>> | 82% | 42,525 psi | 86% | 2552 fps | 98.4% |
| Alliant Reloder-16 | <<locked>> | 92% | 41,959 psi | 85% | 2608 fps | 98% |
| Alliant Reloder-17 | <<locked>> | 88% | 41,814 psi | 85% | 2631 fps | 99.2% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 38,406 psi | 78% | 2562 fps | 98.4% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 42,525 psi | 86% | 2707 fps | 97.5% |
| Bofors RP3 | <<locked>> | 84% | 42,134 psi | 85% | 2549 fps | 99.4% |
| Hodgdon H380 | <<locked>> | 84% | 42,917 psi | 87% | 2552 fps | 97.4% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 43,859 psi | 89% | 2598 fps | 99.4% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 43,323 psi | 88% | 2598 fps | 99.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,578 psi | 72% | 1657 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 41,945 psi | 85% | 2500 fps | 98.3% |
| IMR 4831 | <<locked>> | 94% | 43,569 psi | 88% | 2605 fps | 98.2% |
| IMR 4895 | <<locked>> | 82% | 43,569 psi | 88% | 2579 fps | 99% |
| Lovex S062 | <<locked>> | 82% | 41,872 psi | 85% | 2503 fps | 99.5% |
| Lovex S065 | <<locked>> | 90% | 43,961 psi | 89% | 2546 fps | 96.8% |
| Norma 203B | <<locked>> | 82% | 41,872 psi | 85% | 2539 fps | 98.7% |
| Norma URP | <<locked>> | 92% | 42,409 psi | 86% | 2595 fps | 97.7% |
| Ramshot Big Game | <<locked>> | 84% | 44,425 psi | 90% | 2608 fps | 99% |
| Ramshot Hunter | <<locked>> | 94% | 44,208 psi | 90% | 2635 fps | 96.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,984 psi | 73% | 1696 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 43,453 psi | 88% | 2536 fps | 95.9% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 44,585 psi | 90% | 2694 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 42,221 psi | 86% | 2621 fps | 97.5% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 42,076 psi | 85% | 2625 fps | 96.8% |
| Rottweil R 902 | <<locked>> | 82% | 43,990 psi | 89% | 2523 fps | 99.7% |
| Rottweil R 903 | <<locked>> | 86% | 42,003 psi | 85% | 2539 fps | 99.2% |
| Shooters World Long Rifle | <<locked>> | 90% | 43,961 psi | 89% | 2546 fps | 96.8% |
| Shooters World Precision | <<locked>> | 82% | 41,872 psi | 85% | 2503 fps | 99.5% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 43,381 psi | 88% | 2595 fps | 98.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 42,235 psi | 86% | 2438 fps | 100% |
| Somchem S355 | <<locked>> | 86% | 42,960 psi | 87% | 2549 fps | 99.2% |
| Somchem S365 | <<locked>> | 96% | 43,178 psi | 88% | 2651 fps | 99.9% |
| Vihtavuori N135 | <<locked>> | 82% | 43,308 psi | 88% | 2500 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 44,048 psi | 89% | 2510 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 43,656 psi | 89% | 2530 fps | 99.8% |
| Vihtavuori N160 | <<locked>> | 92% | 44,454 psi | 90% | 2595 fps | 98.1% |
| Vihtavuori N540 | <<locked>> | 82% | 42,395 psi | 86% | 2500 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 43,700 psi | 89% | 2598 fps | 97.8% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 41,843 psi | 85% | 2635 fps | 98.4% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 44,324 psi | 90% | 2575 fps | 99.5% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 34,156 psi | 69% | 2549 fps | 98% |
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 2495 | <<locked>> | 80% | 40,785 psi | 83% | 2464 fps | 100% |
| Accurate 4064 | <<locked>> | 80% | 38,551 psi | 78% | 2457 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 34,447 psi | 70% | 2434 fps | 95.5% |
| ADI AR 2208 | <<locked>> | 80% | 37,666 psi | 76% | 2418 fps | 97.1% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 40,103 psi | 81% | 2589 fps | 97.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 37,202 psi | 75% | 2441 fps | 98.5% |
| Alliant Reloder-15 | <<locked>> | 80% | 39,871 psi | 81% | 2500 fps | 97.9% |
| Alliant Reloder-16 | <<locked>> | 86% | 34,896 psi | 71% | 2448 fps | 95.6% |
| Alliant Reloder-17 | 41.5 gr | 80% | 32,126 psi | 65% | 2405 fps | 96.4% |
| Alliant Reloder-23 | <<locked>> | 92% | 30,037 psi | 61% | 2349 fps | 95.2% |
| Alliant Reloder-26 | <<locked>> | 96% | 37,043 psi | 75% | 2582 fps | 95.6% |
| Bofors RP3 | <<locked>> | 80% | 36,898 psi | 75% | 2444 fps | 98.5% |
| Hodgdon H380 | <<locked>> | 80% | 37,681 psi | 76% | 2448 fps | 95.9% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 30,110 psi | 61% | 2300 fps | 95.6% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 40,538 psi | 82% | 2546 fps | 99.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,324 psi | 53% | 1476 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 39,552 psi | 80% | 2451 fps | 97.8% |
| IMR 4831 | <<locked>> | 86% | 33,417 psi | 68% | 2395 fps | 95.2% |
| IMR 4895 | <<locked>> | 80% | 40,828 psi | 83% | 2530 fps | 98.6% |
| Lovex S062 | <<locked>> | 80% | 39,494 psi | 80% | 2457 fps | 99.2% |
| Lovex S065 | <<locked>> | 86% | 39,015 psi | 79% | 2451 fps | 95.4% |
| Norma 203B | <<locked>> | 80% | 39,233 psi | 80% | 2487 fps | 98.2% |
| Norma URP | <<locked>> | 86% | 34,780 psi | 71% | 2434 fps | 95.4% |
| Ramshot Big Game | <<locked>> | 80% | 38,740 psi | 79% | 2500 fps | 97.9% |
| Ramshot Hunter | <<locked>> | 92% | 41,539 psi | 84% | 2585 fps | 95.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,789 psi | 54% | 1512 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 40,785 psi | 83% | 2484 fps | 95.1% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 34,200 psi | 69% | 2470 fps | 99.3% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 36,738 psi | 75% | 2507 fps | 95.9% |
| ReloadSwiss RS 70 | 47.4 gr | 90% | 39,479 psi | 80% | 2569 fps | 95.9% |
| Rottweil R 902 | <<locked>> | 80% | 41,191 psi | 84% | 2470 fps | 99.4% |
| Rottweil R 903 | <<locked>> | 80% | 34,606 psi | 70% | 2388 fps | 97.6% |
| Shooters World Long Rifle | <<locked>> | 86% | 39,015 psi | 79% | 2451 fps | 95.4% |
| Shooters World Precision | <<locked>> | 80% | 39,494 psi | 80% | 2457 fps | 99.2% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 35,491 psi | 72% | 2434 fps | 97.1% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 37,202 psi | 75% | 2349 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 35,563 psi | 72% | 2398 fps | 97.7% |
| Somchem S365 | 40.3 gr | 82% | 27,427 psi | 56% | 2283 fps | 95.9% |
| Vihtavuori N135 | <<locked>> | 80% | 40,727 psi | 83% | 2457 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 41,292 psi | 84% | 2464 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 33,736 psi | 68% | 2336 fps | 98.4% |
| Vihtavuori N160 | <<locked>> | 84% | 34,142 psi | 69% | 2388 fps | 95.1% |
| Vihtavuori N540 | <<locked>> | 80% | 39,769 psi | 81% | 2454 fps | 100% |
| Vihtavuori N550 | <<locked>> | 86% | 35,781 psi | 73% | 2438 fps | 95.5% |
| Vihtavuori N555 | <<locked>> | 92% | 32,169 psi | 65% | 2425 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 30,037 psi | 61% | 2264 fps | 95.6% |
| Winchester StaBALL HD | <<locked>> | 96% | 30,153 psi | 61% | 2425 fps | 95.7% |
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 47 powders for 7 x 57 R loaded with the .284 | 150gr | Remington PSP Core-Lokt. Alliant Reloder-26 delivers the highest muzzle velocity at 2,707 fps; across all powders the maximum-charge window runs from 1,657 fps to 2,707 fps. Alliant Reloder-23 gives the best case fill at 100 %, and 47 of the 47 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (340 MPa), the top charges use 69–90 %, leaving at least 10 % headroom. The 150.0 gr projectile in 0.284" calls for a 1:12.0 twist; slower twists will usually not stabilise this weight. Alliant Reloder-23, Alliant Reloder-26, 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. Somchem S365, Alliant Reloder-17, ReloadSwiss RS 70 rank at the top here: for 7 x 57 R with the .284 | 150gr | Remington PSP 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.