Load Specifications
Load data in caliber 5.6 x 70 R with .224 | 62gr | Swift Scirocco bullet and 6 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 14 and Hodgdon TrailBoss.
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% | 33,692 psi | 89% | 2785 fps | 99.1% |
| Accurate 4064 | <<locked>> | 84% | 33,794 psi | 90% | 2805 fps | 97% |
| Hodgdon TrailBoss | <<locked>> | 98% | 32,895 psi | 87% | 1988 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 98% | 33,460 psi | 89% | 2041 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 34,026 psi | 90% | 2717 fps | 97.7% |
| Vihtavuori N135 | <<locked>> | 82% | 34,055 psi | 90% | 2792 fps | 99.1% |
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% | 31,270 psi | 83% | 2723 fps | 98.5% |
| Accurate 4064 | <<locked>> | 80% | 29,588 psi | 78% | 2687 fps | 95.2% |
| Hodgdon TrailBoss | 8.9 gr | 80% | 25,048 psi | 66% | 1798 fps | 100% |
| ReloadSwiss RS 14 | 9.1 gr | 80% | 25,266 psi | 67% | 1844 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 30,052 psi | 80% | 2612 fps | 96.3% |
| Vihtavuori N135 | <<locked>> | 80% | 31,937 psi | 85% | 2740 fps | 98.5% |
Recommended = one of the top powders for this cartridge and bullet combination.
This overview compares 6 powders for 5.6 x 70 R loaded with the .224 | 62gr | Swift Scirocco. Accurate 4064 delivers the highest muzzle velocity at 2,805 fps; across all powders the maximum-charge window runs from 1,988 fps to 2,805 fps. Hodgdon TrailBoss gives the best case fill at 98 %, and 6 of the 6 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (260 MPa), the top charges use 87–90 %, leaving at least 10 % headroom. The 62.0 gr projectile in 0.224" calls for a 1:9.0 twist; slower twists will usually not stabilise this weight. ReloadSwiss RS 14, Hodgdon TrailBoss rank at the top here: for 5.6 x 70 R with the .224 | 62gr | Swift Scirocco 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.