Load Specifications
Load data in caliber 5.6 x 70 R with .224 | 95gr | Sierra MatchKing bullet and 8 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Winchester StaBALL HD, Alliant Reloder-23 and ReloadSwiss RS 14.
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 |
|---|---|---|---|---|---|---|
| Alliant Reloder-23 | <<locked>> | 94% | 32,851 psi | 87% | 2365 fps | 97% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 32,779 psi | 87% | 2310 fps | 97.1% |
| Hodgdon TrailBoss | <<locked>> | 96% | 33,692 psi | 89% | 1591 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 94% | 33,286 psi | 88% | 1614 fps | 100% |
| Somchem S365 | <<locked>> | 86% | 32,010 psi | 85% | 2349 fps | 98.3% |
| Vihtavuori N555 | <<locked>> | 92% | 33,431 psi | 89% | 2392 fps | 96.3% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 32,909 psi | 87% | 2277 fps | 97.3% |
| Winchester StaBALL HD | <<locked>> | 98% | 33,098 psi | 88% | 2457 fps | 98.1% |
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 |
|---|---|---|---|---|---|---|
| Alliant Reloder-23 | 26.9 gr | 90% | 29,051 psi | 77% | 2264 fps | 95.1% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 28,805 psi | 76% | 2208 fps | 95.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,295 psi | 70% | 1447 fps | 100% |
| ReloadSwiss RS 14 | 8.4 gr | 80% | 26,803 psi | 71% | 1486 fps | 100% |
| Somchem S365 | <<locked>> | 80% | 26,426 psi | 70% | 2195 fps | 95.8% |
| Vihtavuori N555 | <<locked>> | 90% | 31,328 psi | 83% | 2339 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 30,690 psi | 81% | 2224 fps | 96.4% |
| Winchester StaBALL HD | 29.7 gr | 94% | 29,298 psi | 78% | 2339 fps | 95.8% |
Recommended = one of the top powders for this cartridge and bullet combination.
This overview compares 8 powders for 5.6 x 70 R loaded with the .224 | 95gr | Sierra MatchKing. Winchester StaBALL HD delivers the highest muzzle velocity at 2,457 fps; across all powders the maximum-charge window runs from 1,591 fps to 2,457 fps. Winchester StaBALL HD gives the best case fill at 98 %, and 8 of the 8 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (260 MPa), the top charges use 85–89 %, leaving at least 11 % headroom. The 95.0 gr projectile in 0.224" calls for a 1:7.5 twist; slower twists will usually not stabilise this weight. Winchester StaBALL HD, Alliant Reloder-23, ReloadSwiss RS 14 rank at the top here: for 5.6 x 70 R with the .224 | 95gr | Sierra MatchKing 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.