Load Specifications
Load data in caliber 7 x 57 R with .284 | 150gr | Nosler SP SolBase 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, ReloadSwiss RS 70 and Alliant Reloder-17.
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% | 43,613 psi | 88% | 2513 fps | 100% |
| Accurate 4064 | <<locked>> | 84% | 43,932 psi | 89% | 2556 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 42,699 psi | 87% | 2605 fps | 97.9% |
| ADI AR 2208 | <<locked>> | 84% | 42,801 psi | 87% | 2523 fps | 98.3% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 43,236 psi | 88% | 2657 fps | 98.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 42,351 psi | 86% | 2546 fps | 99.4% |
| Alliant Reloder-15 | <<locked>> | 82% | 42,772 psi | 87% | 2559 fps | 98.5% |
| Alliant Reloder-16 | <<locked>> | 92% | 42,134 psi | 85% | 2615 fps | 98% |
| Alliant Reloder-17 | <<locked>> | 88% | 42,003 psi | 85% | 2638 fps | 99.3% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 38,566 psi | 78% | 2569 fps | 98.5% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 42,917 psi | 87% | 2720 fps | 97.7% |
| Bofors RP3 | <<locked>> | 84% | 42,366 psi | 86% | 2556 fps | 99.4% |
| Hodgdon H380 | <<locked>> | 84% | 43,134 psi | 87% | 2559 fps | 97.5% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 44,034 psi | 89% | 2605 fps | 99.4% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 43,555 psi | 88% | 2602 fps | 99.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,375 psi | 72% | 1657 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 42,163 psi | 86% | 2507 fps | 98.4% |
| IMR 4831 | <<locked>> | 94% | 43,772 psi | 89% | 2608 fps | 98.2% |
| IMR 4895 | <<locked>> | 82% | 43,816 psi | 89% | 2589 fps | 99.1% |
| Lovex S062 | <<locked>> | 82% | 42,134 psi | 85% | 2510 fps | 99.5% |
| Lovex S065 | <<locked>> | 90% | 44,179 psi | 90% | 2552 fps | 96.9% |
| Norma 203B | <<locked>> | 82% | 42,090 psi | 85% | 2546 fps | 98.8% |
| Norma URP | <<locked>> | 92% | 42,627 psi | 86% | 2602 fps | 97.8% |
| Ramshot Big Game | <<locked>> | 82% | 41,829 psi | 85% | 2562 fps | 98.6% |
| Ramshot Hunter | <<locked>> | 94% | 44,367 psi | 90% | 2641 fps | 96.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,071 psi | 73% | 1699 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 43,642 psi | 89% | 2543 fps | 95.9% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 41,974 psi | 85% | 2644 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 42,366 psi | 86% | 2625 fps | 97.6% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 42,496 psi | 86% | 2638 fps | 97% |
| Rottweil R 902 | <<locked>> | 82% | 44,208 psi | 90% | 2530 fps | 99.7% |
| Rottweil R 903 | <<locked>> | 86% | 42,250 psi | 86% | 2546 fps | 99.3% |
| Shooters World Long Rifle | <<locked>> | 90% | 44,179 psi | 90% | 2552 fps | 96.9% |
| Shooters World Precision | <<locked>> | 82% | 42,134 psi | 85% | 2510 fps | 99.5% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 43,584 psi | 88% | 2602 fps | 99% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 42,177 psi | 86% | 2438 fps | 100% |
| Somchem S355 | <<locked>> | 86% | 43,192 psi | 88% | 2552 fps | 99.2% |
| Somchem S365 | <<locked>> | 96% | 43,323 psi | 88% | 2657 fps | 99.9% |
| Vihtavuori N135 | <<locked>> | 82% | 43,584 psi | 88% | 2507 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 44,295 psi | 90% | 2516 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 43,859 psi | 89% | 2536 fps | 99.9% |
| Vihtavuori N160 | <<locked>> | 90% | 41,814 psi | 85% | 2549 fps | 97.5% |
| Vihtavuori N540 | <<locked>> | 82% | 42,612 psi | 86% | 2507 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 43,918 psi | 89% | 2605 fps | 97.8% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 42,032 psi | 85% | 2641 fps | 98.4% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 41,800 psi | 85% | 2530 fps | 99.2% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 34,461 psi | 70% | 2562 fps | 98.2% |
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% | 41,031 psi | 83% | 2467 fps | 100% |
| Accurate 4064 | <<locked>> | 80% | 38,812 psi | 79% | 2461 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 34,664 psi | 70% | 2441 fps | 95.6% |
| ADI AR 2208 | <<locked>> | 80% | 37,898 psi | 77% | 2428 fps | 97.2% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 40,248 psi | 82% | 2595 fps | 97.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 37,463 psi | 76% | 2448 fps | 98.5% |
| Alliant Reloder-15 | <<locked>> | 80% | 40,074 psi | 81% | 2503 fps | 97.9% |
| Alliant Reloder-16 | <<locked>> | 86% | 35,056 psi | 71% | 2454 fps | 95.7% |
| Alliant Reloder-17 | 41.7 gr | 80% | 32,300 psi | 66% | 2415 fps | 96.5% |
| Alliant Reloder-23 | <<locked>> | 92% | 30,211 psi | 61% | 2359 fps | 95.3% |
| Alliant Reloder-26 | <<locked>> | 96% | 37,420 psi | 76% | 2595 fps | 95.8% |
| Bofors RP3 | <<locked>> | 80% | 37,086 psi | 75% | 2451 fps | 98.6% |
| Hodgdon H380 | <<locked>> | 80% | 37,855 psi | 77% | 2451 fps | 96% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 30,269 psi | 61% | 2306 fps | 95.7% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 40,770 psi | 83% | 2552 fps | 99.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,440 psi | 54% | 1480 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 39,769 psi | 81% | 2461 fps | 97.9% |
| IMR 4831 | <<locked>> | 86% | 33,576 psi | 68% | 2398 fps | 95.3% |
| IMR 4895 | <<locked>> | 80% | 41,060 psi | 83% | 2533 fps | 98.6% |
| Lovex S062 | <<locked>> | 80% | 39,494 psi | 80% | 2461 fps | 99.2% |
| Lovex S065 | <<locked>> | 86% | 39,189 psi | 79% | 2454 fps | 95.5% |
| Norma 203B | <<locked>> | 80% | 39,465 psi | 80% | 2493 fps | 98.3% |
| Norma URP | <<locked>> | 86% | 34,983 psi | 71% | 2441 fps | 95.5% |
| Ramshot Big Game | <<locked>> | 80% | 38,943 psi | 79% | 2507 fps | 98% |
| Ramshot Hunter | <<locked>> | 92% | 41,669 psi | 85% | 2589 fps | 95.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,643 psi | 54% | 1512 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 40,988 psi | 83% | 2490 fps | 95.2% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 34,389 psi | 70% | 2477 fps | 99.3% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 34,606 psi | 70% | 2461 fps | 95.1% |
| ReloadSwiss RS 70 | 46.6 gr | 88% | 37,202 psi | 75% | 2520 fps | 95.1% |
| Rottweil R 902 | <<locked>> | 80% | 41,452 psi | 84% | 2477 fps | 99.4% |
| Rottweil R 903 | <<locked>> | 80% | 34,853 psi | 71% | 2395 fps | 97.7% |
| Shooters World Long Rifle | <<locked>> | 86% | 39,189 psi | 79% | 2454 fps | 95.5% |
| Shooters World Precision | <<locked>> | 80% | 39,494 psi | 80% | 2461 fps | 99.2% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 35,708 psi | 72% | 2441 fps | 97.2% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 37,434 psi | 76% | 2352 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 35,810 psi | 73% | 2405 fps | 97.8% |
| Somchem S365 | 39.5 gr | 80% | 25,875 psi | 52% | 2234 fps | 95% |
| Vihtavuori N135 | <<locked>> | 80% | 40,973 psi | 83% | 2464 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 41,495 psi | 84% | 2470 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 33,910 psi | 69% | 2343 fps | 98.5% |
| Vihtavuori N160 | <<locked>> | 84% | 34,345 psi | 70% | 2392 fps | 95.2% |
| Vihtavuori N540 | <<locked>> | 80% | 39,987 psi | 81% | 2461 fps | 100% |
| Vihtavuori N550 | <<locked>> | 86% | 36,013 psi | 73% | 2444 fps | 95.6% |
| Vihtavuori N555 | <<locked>> | 92% | 32,401 psi | 66% | 2431 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 30,182 psi | 61% | 2270 fps | 95.8% |
| Winchester StaBALL HD | <<locked>> | 96% | 30,240 psi | 61% | 2431 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 47 powders for 7 x 57 R loaded with the .284 | 150gr | Nosler SP SolBase. Alliant Reloder-26 delivers the highest muzzle velocity at 2,720 fps; across all powders the maximum-charge window runs from 1,657 fps to 2,720 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 70–90 %, 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, ReloadSwiss RS 70, Alliant Reloder-17 rank at the top here: for 7 x 57 R with the .284 | 150gr | Nosler SP SolBase 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.