Load Specifications
Load data in caliber 7 x 57 R with .284 | 150gr | Swift Scirocco bullet and 55 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 60, 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>> | 84% | 43,627 psi | 88% | 2497 fps | 100% |
| Accurate 4064 | <<locked>> | 86% | 43,787 psi | 89% | 2536 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 42,163 psi | 86% | 2575 fps | 97.4% |
| ADI AR 2208 | <<locked>> | 86% | 43,018 psi | 87% | 2507 fps | 98% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 43,395 psi | 88% | 2635 fps | 98.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 42,409 psi | 86% | 2526 fps | 99.2% |
| Alliant Reloder-15 | <<locked>> | 84% | 42,801 psi | 87% | 2536 fps | 98.2% |
| Alliant Reloder-16 | <<locked>> | 94% | 42,163 psi | 86% | 2589 fps | 97.6% |
| Alliant Reloder-17 | <<locked>> | 90% | 42,076 psi | 85% | 2615 fps | 99% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 35,926 psi | 73% | 2484 fps | 97.3% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 43,743 psi | 89% | 2552 fps | 97.9% |
| Bofors RP3 | <<locked>> | 86% | 42,163 psi | 86% | 2533 fps | 99.2% |
| Hodgdon H380 | <<locked>> | 86% | 43,149 psi | 88% | 2536 fps | 97.1% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 43,888 psi | 89% | 2579 fps | 99.1% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 43,671 psi | 89% | 2585 fps | 99.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,056 psi | 71% | 1624 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 43,366 psi | 88% | 2516 fps | 99% |
| IMR 3031 | <<locked>> | 82% | 44,469 psi | 90% | 2556 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 42,511 psi | 86% | 2490 fps | 98.2% |
| IMR 4831 | <<locked>> | 96% | 43,424 psi | 88% | 2582 fps | 97.8% |
| IMR 4895 | <<locked>> | 84% | 43,845 psi | 89% | 2566 fps | 98.8% |
| Lovex D073.6 | <<locked>> | 82% | 43,700 psi | 89% | 2536 fps | 100% |
| Lovex S062 | <<locked>> | 84% | 42,366 psi | 86% | 2493 fps | 99.4% |
| Lovex S065 | <<locked>> | 92% | 44,121 psi | 89% | 2526 fps | 96.4% |
| Norma 201 | <<locked>> | 82% | 43,874 psi | 89% | 2510 fps | 99.5% |
| Norma 202 | <<locked>> | 82% | 44,092 psi | 89% | 2516 fps | 100% |
| Norma 203B | <<locked>> | 84% | 42,119 psi | 85% | 2526 fps | 98.5% |
| Norma URP | <<locked>> | 94% | 42,177 psi | 86% | 2572 fps | 97.3% |
| Ramshot Big Game | <<locked>> | 84% | 41,814 psi | 85% | 2543 fps | 98.3% |
| Ramshot Hunter | <<locked>> | 96% | 44,222 psi | 90% | 2612 fps | 95.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,462 psi | 72% | 1663 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 42,192 psi | 86% | 2589 fps | 98.1% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 41,959 psi | 85% | 2625 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 41,872 psi | 85% | 2595 fps | 97% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 42,496 psi | 86% | 2608 fps | 96.4% |
| Rottweil R 902 | <<locked>> | 84% | 44,208 psi | 90% | 2507 fps | 99.5% |
| Rottweil R 903 | <<locked>> | 88% | 42,337 psi | 86% | 2530 fps | 99% |
| Shooters World Long Rifle | <<locked>> | 92% | 44,121 psi | 89% | 2526 fps | 96.4% |
| Shooters World Match Rifle | <<locked>> | 82% | 43,700 psi | 89% | 2536 fps | 100% |
| Shooters World Precision | <<locked>> | 84% | 42,366 psi | 86% | 2493 fps | 99.4% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 43,410 psi | 88% | 2579 fps | 98.7% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 43,279 psi | 88% | 2526 fps | 98.6% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 42,554 psi | 86% | 2425 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 44,570 psi | 90% | 2536 fps | 98.8% |
| Somchem S355 | <<locked>> | 88% | 43,062 psi | 87% | 2530 fps | 99% |
| Somchem S365 | <<locked>> | 98% | 42,830 psi | 87% | 2628 fps | 99.8% |
| Vihtavuori N135 | <<locked>> | 84% | 43,584 psi | 88% | 2490 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 44,367 psi | 90% | 2500 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 44,005 psi | 89% | 2520 fps | 99.8% |
| Vihtavuori N160 | <<locked>> | 94% | 44,382 psi | 90% | 2575 fps | 97.7% |
| Vihtavuori N540 | <<locked>> | 84% | 42,786 psi | 87% | 2493 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 43,700 psi | 89% | 2579 fps | 97.4% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 38,580 psi | 78% | 2556 fps | 97.2% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 41,771 psi | 85% | 2507 fps | 98.9% |
| Winchester StaBALL Match | <<locked>> | 82% | 42,583 psi | 86% | 2526 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 2495 | <<locked>> | 80% | 38,348 psi | 78% | 2408 fps | 100% |
| Accurate 4064 | <<locked>> | 80% | 36,303 psi | 74% | 2398 fps | 99.8% |
| Accurate 4350 | <<locked>> | 88% | 34,287 psi | 70% | 2415 fps | 95% |
| ADI AR 2208 | <<locked>> | 80% | 35,795 psi | 73% | 2359 fps | 96.1% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 37,884 psi | 77% | 2516 fps | 96.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 35,215 psi | 71% | 2382 fps | 97.7% |
| Alliant Reloder-15 | <<locked>> | 80% | 37,840 psi | 77% | 2438 fps | 97% |
| Alliant Reloder-16 | <<locked>> | 88% | 34,983 psi | 71% | 2428 fps | 95.1% |
| Alliant Reloder-17 | 40.2 gr | 82% | 32,343 psi | 66% | 2392 fps | 96% |
| Alliant Reloder-23 | <<locked>> | 96% | 31,879 psi | 65% | 2382 fps | 95.6% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 40,944 psi | 83% | 2500 fps | 97.2% |
| Bofors RP3 | <<locked>> | 80% | 34,621 psi | 70% | 2382 fps | 97.6% |
| Hodgdon H380 | <<locked>> | 82% | 37,840 psi | 77% | 2431 fps | 95.5% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 30,197 psi | 61% | 2283 fps | 95.1% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 38,058 psi | 77% | 2477 fps | 98.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,194 psi | 53% | 1453 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 40,509 psi | 82% | 2464 fps | 98.5% |
| IMR 3031 | <<locked>> | 80% | 41,655 psi | 84% | 2510 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 37,550 psi | 76% | 2392 fps | 96.9% |
| IMR 4831 | <<locked>> | 90% | 35,665 psi | 72% | 2428 fps | 95.6% |
| IMR 4895 | <<locked>> | 80% | 38,754 psi | 79% | 2467 fps | 97.8% |
| Lovex D073.6 | <<locked>> | 80% | 40,741 psi | 83% | 2484 fps | 99.9% |
| Lovex S062 | <<locked>> | 80% | 37,449 psi | 76% | 2398 fps | 98.6% |
| Lovex S065 | <<locked>> | 90% | 41,553 psi | 84% | 2480 fps | 95.7% |
| Norma 201 | <<locked>> | 80% | 41,249 psi | 84% | 2461 fps | 99.2% |
| Norma 202 | <<locked>> | 80% | 41,437 psi | 84% | 2470 fps | 100% |
| Norma 203B | <<locked>> | 80% | 37,231 psi | 76% | 2428 fps | 97.4% |
| Norma URP | <<locked>> | 88% | 35,027 psi | 71% | 2421 fps | 95% |
| Ramshot Big Game | <<locked>> | 80% | 36,521 psi | 74% | 2434 fps | 96.9% |
| Ramshot Hunter | <<locked>> | 94% | 41,394 psi | 84% | 2559 fps | 95.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,368 psi | 53% | 1486 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 39,291 psi | 80% | 2530 fps | 97.4% |
| ReloadSwiss RS 60 | 39.2 gr | 80% | 32,213 psi | 65% | 2398 fps | 98.4% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 36,738 psi | 75% | 2487 fps | 95.4% |
| ReloadSwiss RS 70 | 45.8 gr | 92% | 39,755 psi | 81% | 2552 fps | 95.4% |
| Rottweil R 902 | <<locked>> | 80% | 39,117 psi | 79% | 2411 fps | 98.8% |
| Rottweil R 903 | <<locked>> | 80% | 32,605 psi | 66% | 2329 fps | 96.7% |
| Shooters World Long Rifle | <<locked>> | 90% | 41,553 psi | 84% | 2480 fps | 95.7% |
| Shooters World Match Rifle | <<locked>> | 80% | 40,741 psi | 83% | 2484 fps | 99.9% |
| Shooters World Precision | <<locked>> | 80% | 37,449 psi | 76% | 2398 fps | 98.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 33,533 psi | 68% | 2372 fps | 96% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 40,466 psi | 82% | 2470 fps | 98.1% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 35,186 psi | 71% | 2290 fps | 99.9% |
| Somchem S341 | <<locked>> | 80% | 41,684 psi | 85% | 2487 fps | 98.3% |
| Somchem S355 | <<locked>> | 80% | 33,591 psi | 68% | 2336 fps | 96.7% |
| Somchem S365 | <<locked>> | 84% | 27,441 psi | 56% | 2264 fps | 95.4% |
| Vihtavuori N135 | <<locked>> | 80% | 38,290 psi | 78% | 2398 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 39,218 psi | 80% | 2408 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 31,894 psi | 65% | 2277 fps | 97.6% |
| Vihtavuori N160 | <<locked>> | 88% | 36,535 psi | 74% | 2421 fps | 95.5% |
| Vihtavuori N540 | <<locked>> | 80% | 37,637 psi | 76% | 2398 fps | 99.8% |
| Vihtavuori N550 | <<locked>> | 88% | 35,882 psi | 73% | 2425 fps | 95.1% |
| Vihtavuori N555 | <<locked>> | 96% | 34,011 psi | 69% | 2454 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 30,226 psi | 61% | 2247 fps | 95.2% |
| Winchester StaBALL Match | <<locked>> | 80% | 39,740 psi | 81% | 2474 fps | 98.5% |
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 79 powders for 7 x 57 R loaded with the .284 | 150gr | Swift Scirocco. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,635 fps; across all powders the maximum-charge window runs from 1,624 fps to 2,635 fps. Accurate 3100 gives the best case fill at 100 %, and 79 of the 79 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (340 MPa), the top charges use 65–90 %, leaving at least 10 % headroom. The 150.0 gr projectile in 0.284" calls for a 1:9.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, Alliant Reloder-19, Alliant Reloder-23 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 60, ReloadSwiss RS 70, Alliant Reloder-17 rank at the top here: for 7 x 57 R with the .284 | 150gr | Swift Scirocco they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 2700, Accurate 3100, ADI AR 2209 burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.