Load Specifications
Load data in caliber 5.6 x 70 R with .224 | 55gr | Winchester Pointed Soft Point 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>> | 86% | 33,562 psi | 89% | 2920 fps | 98% |
| Alliant AR-Comp | <<locked>> | 82% | 33,968 psi | 90% | 2972 fps | 99.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 33,170 psi | 88% | 2103 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 32,532 psi | 86% | 2936 fps | 96.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 33,170 psi | 88% | 2149 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 31,734 psi | 84% | 2867 fps | 97.3% |
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% | 27,282 psi | 72% | 2736 fps | 95.5% |
| Alliant AR-Comp | <<locked>> | 80% | 31,836 psi | 84% | 2913 fps | 99.3% |
| Hodgdon TrailBoss | 8.7 gr | 80% | 24,366 psi | 65% | 1886 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 30,516 psi | 81% | 2877 fps | 95.5% |
| ReloadSwiss RS 14 | 8.9 gr | 80% | 24,511 psi | 65% | 1932 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 27,833 psi | 74% | 2753 fps | 95.6% |
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 6 powders for 5.6 x 70 R loaded with the .224 | 55gr | Winchester Pointed Soft Point. Alliant AR-Comp delivers the highest muzzle velocity at 2,972 fps; across all powders the maximum-charge window runs from 2,103 fps to 2,972 fps. Hodgdon TrailBoss gives the best case fill at 100 %, 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 84–90 %, leaving at least 10 % headroom. The 55.0 gr projectile in 0.224" calls for a 1:7.5 twist; slower twists will usually not stabilise this weight. Hodgdon TrailBoss, ReloadSwiss RS 14 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 14, Hodgdon TrailBoss rank at the top here: for 5.6 x 70 R with the .224 | 55gr | Winchester Pointed Soft Point 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.