Load Specifications
Load data in caliber 7 x 57 R with .284 | 150gr | Nosler Partition bullet and 48 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% | 42,975 psi | 87% | 2497 fps | 100% |
| Accurate 4064 | <<locked>> | 84% | 43,062 psi | 87% | 2536 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 41,655 psi | 84% | 2582 fps | 97.6% |
| ADI AR 2208 | <<locked>> | 84% | 42,061 psi | 85% | 2503 fps | 98.1% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 42,583 psi | 86% | 2638 fps | 98.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 44,411 psi | 90% | 2575 fps | 99.6% |
| Alliant Reloder-15 | <<locked>> | 82% | 42,003 psi | 85% | 2536 fps | 98.3% |
| Alliant Reloder-16 | <<locked>> | 94% | 44,019 psi | 89% | 2644 fps | 98.3% |
| Alliant Reloder-17 | <<locked>> | 90% | 44,193 psi | 90% | 2674 fps | 99.5% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 37,840 psi | 77% | 2543 fps | 98.2% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 41,959 psi | 85% | 2690 fps | 97.2% |
| Bofors RP3 | <<locked>> | 86% | 44,483 psi | 90% | 2589 fps | 99.6% |
| Hodgdon H380 | <<locked>> | 84% | 42,409 psi | 86% | 2539 fps | 97.2% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 43,381 psi | 88% | 2585 fps | 99.3% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 42,786 psi | 87% | 2582 fps | 99.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,520 psi | 72% | 1650 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 44,222 psi | 90% | 2536 fps | 98.7% |
| IMR 4831 | <<locked>> | 94% | 42,815 psi | 87% | 2585 fps | 97.9% |
| IMR 4895 | <<locked>> | 82% | 43,004 psi | 87% | 2566 fps | 98.9% |
| Lovex S062 | <<locked>> | 84% | 44,092 psi | 89% | 2539 fps | 99.7% |
| Lovex S065 | <<locked>> | 90% | 43,526 psi | 88% | 2533 fps | 96.6% |
| Norma 203B | <<locked>> | 84% | 44,121 psi | 89% | 2579 fps | 99% |
| Norma URP | <<locked>> | 94% | 44,527 psi | 90% | 2631 fps | 98.1% |
| Ramshot Big Game | <<locked>> | 84% | 43,903 psi | 89% | 2595 fps | 98.9% |
| Ramshot Hunter | <<locked>> | 94% | 43,540 psi | 88% | 2618 fps | 96.1% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,926 psi | 73% | 1690 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 44,469 psi | 90% | 2644 fps | 98.7% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 44,106 psi | 89% | 2680 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 44,353 psi | 90% | 2654 fps | 97.9% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 44,498 psi | 90% | 2671 fps | 97.4% |
| Rottweil R 902 | <<locked>> | 82% | 43,381 psi | 88% | 2507 fps | 99.6% |
| Rottweil R 903 | <<locked>> | 88% | 44,338 psi | 90% | 2579 fps | 99.5% |
| Shooters World Long Rifle | <<locked>> | 90% | 43,526 psi | 88% | 2533 fps | 96.6% |
| Shooters World Precision | <<locked>> | 84% | 44,092 psi | 89% | 2539 fps | 99.7% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 42,888 psi | 87% | 2582 fps | 98.8% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 44,266 psi | 90% | 2467 fps | 100% |
| Somchem S355 | <<locked>> | 86% | 42,424 psi | 86% | 2533 fps | 99.1% |
| Somchem S365 | <<locked>> | 96% | 42,438 psi | 86% | 2635 fps | 99.9% |
| Vihtavuori N135 | <<locked>> | 82% | 42,931 psi | 87% | 2490 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 43,468 psi | 88% | 2497 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 43,134 psi | 87% | 2520 fps | 99.8% |
| Vihtavuori N160 | <<locked>> | 92% | 43,656 psi | 89% | 2579 fps | 97.8% |
| Vihtavuori N540 | <<locked>> | 82% | 41,872 psi | 85% | 2490 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 43,004 psi | 87% | 2582 fps | 97.5% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 41,075 psi | 83% | 2618 fps | 98.1% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 44,005 psi | 89% | 2562 fps | 99.4% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 33,678 psi | 68% | 2530 fps | 97.6% |
| Winchester StaBALL Match | <<locked>> | 82% | 44,440 psi | 90% | 2575 fps | 99.4% |
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% | 40,132 psi | 81% | 2448 fps | 100% |
| Accurate 4064 | <<locked>> | 80% | 37,942 psi | 77% | 2441 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 33,953 psi | 69% | 2421 fps | 95.2% |
| ADI AR 2208 | <<locked>> | 80% | 37,173 psi | 75% | 2405 fps | 96.9% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 39,624 psi | 80% | 2572 fps | 97.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 36,680 psi | 74% | 2425 fps | 98.3% |
| Alliant Reloder-15 | <<locked>> | 80% | 39,566 psi | 80% | 2487 fps | 97.7% |
| Alliant Reloder-16 | <<locked>> | 86% | 34,461 psi | 70% | 2431 fps | 95.3% |
| Alliant Reloder-17 | 41 gr | 80% | 31,705 psi | 64% | 2392 fps | 96.1% |
| Alliant Reloder-23 | <<locked>> | 94% | 31,473 psi | 64% | 2385 fps | 95.8% |
| Alliant Reloder-26 | <<locked>> | 96% | 36,521 psi | 74% | 2566 fps | 95.2% |
| Bofors RP3 | <<locked>> | 80% | 36,332 psi | 74% | 2431 fps | 98.3% |
| Hodgdon H380 | <<locked>> | 80% | 37,144 psi | 75% | 2431 fps | 95.7% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 29,704 psi | 60% | 2287 fps | 95.3% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 40,030 psi | 81% | 2533 fps | 99.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,440 psi | 54% | 1473 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 39,015 psi | 79% | 2438 fps | 97.6% |
| IMR 4831 | <<locked>> | 88% | 35,215 psi | 71% | 2431 fps | 95.8% |
| IMR 4895 | <<locked>> | 80% | 40,524 psi | 82% | 2520 fps | 98.4% |
| Lovex S062 | <<locked>> | 80% | 38,957 psi | 79% | 2444 fps | 99% |
| Lovex S065 | <<locked>> | 86% | 38,537 psi | 78% | 2434 fps | 95.1% |
| Norma 203B | <<locked>> | 80% | 38,957 psi | 79% | 2477 fps | 98.1% |
| Norma URP | <<locked>> | 86% | 34,330 psi | 70% | 2418 fps | 95.1% |
| Ramshot Big Game | <<locked>> | 80% | 38,247 psi | 78% | 2487 fps | 97.7% |
| Ramshot Hunter | <<locked>> | 92% | 40,857 psi | 83% | 2566 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,629 psi | 54% | 1506 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 41,220 psi | 84% | 2582 fps | 98.1% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 33,765 psi | 68% | 2457 fps | 99.1% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 36,056 psi | 73% | 2487 fps | 95.5% |
| ReloadSwiss RS 70 | 46.8 gr | 90% | 38,899 psi | 79% | 2552 fps | 95.6% |
| Rottweil R 902 | <<locked>> | 80% | 40,901 psi | 83% | 2461 fps | 99.3% |
| Rottweil R 903 | <<locked>> | 80% | 34,084 psi | 69% | 2372 fps | 97.4% |
| Shooters World Long Rifle | <<locked>> | 86% | 38,537 psi | 78% | 2434 fps | 95.1% |
| Shooters World Precision | <<locked>> | 80% | 38,957 psi | 79% | 2444 fps | 99% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 35,027 psi | 71% | 2421 fps | 96.8% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 36,651 psi | 74% | 2333 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 35,041 psi | 71% | 2382 fps | 97.5% |
| Somchem S365 | 39.8 gr | 82% | 27,035 psi | 55% | 2267 fps | 95.6% |
| Vihtavuori N135 | <<locked>> | 80% | 40,103 psi | 81% | 2444 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 40,712 psi | 83% | 2451 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 33,199 psi | 67% | 2323 fps | 98.2% |
| Vihtavuori N160 | <<locked>> | 86% | 36,013 psi | 73% | 2425 fps | 95.7% |
| Vihtavuori N540 | <<locked>> | 80% | 39,247 psi | 80% | 2441 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 86% | 35,346 psi | 72% | 2425 fps | 95.2% |
| Vihtavuori N555 | <<locked>> | 92% | 31,763 psi | 64% | 2411 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 29,530 psi | 60% | 2247 fps | 95.3% |
| Winchester StaBALL HD | <<locked>> | 96% | 29,704 psi | 60% | 2405 fps | 95.2% |
| Winchester StaBALL Match | <<locked>> | 80% | 41,640 psi | 84% | 2523 fps | 99% |
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 | 150gr | Nosler Partition. Alliant Reloder-26 delivers the highest muzzle velocity at 2,690 fps; across all powders the maximum-charge window runs from 1,650 fps to 2,690 fps. Alliant Reloder-23 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 68–90 %, leaving at least 10 % headroom. The 150.0 gr projectile in 0.284" calls for a 1:11.5 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 Partition 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.