Load Specifications
Load data in caliber 5.6 x 70 R with .224 | 90gr | Sierra HPBT MatchKinging bullet and 7 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Winchester StaBALL HD, 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 |
|---|---|---|---|---|---|---|
| Alliant Reloder-23 | <<locked>> | 94% | 32,300 psi | 86% | 2411 fps | 96.2% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 32,097 psi | 85% | 2352 fps | 96.3% |
| Hodgdon TrailBoss | <<locked>> | 96% | 33,402 psi | 89% | 1640 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 96% | 33,866 psi | 90% | 1680 fps | 100% |
| Somchem S365 | <<locked>> | 88% | 33,620 psi | 89% | 2451 fps | 98.4% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 32,184 psi | 85% | 2320 fps | 96.5% |
| Winchester StaBALL HD | <<locked>> | 98% | 32,648 psi | 87% | 2497 fps | 97.1% |
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 | <<locked>> | 92% | 30,429 psi | 81% | 2359 fps | 95.2% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 30,139 psi | 80% | 2303 fps | 95.4% |
| Hodgdon TrailBoss | 8.4 gr | 80% | 26,208 psi | 70% | 1496 fps | 100% |
| ReloadSwiss RS 14 | 8.6 gr | 80% | 26,687 psi | 71% | 1535 fps | 100% |
| Somchem S365 | <<locked>> | 82% | 27,601 psi | 73% | 2290 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 30,037 psi | 80% | 2264 fps | 95.5% |
| Winchester StaBALL HD | 31 gr | 96% | 30,472 psi | 81% | 2431 fps | 95.8% |
Recommended = one of the top powders for this cartridge and bullet combination.
This overview compares 7 powders for 5.6 x 70 R loaded with the .224 | 90gr | Sierra HPBT MatchKinging. Winchester StaBALL HD delivers the highest muzzle velocity at 2,497 fps; across all powders the maximum-charge window runs from 1,640 fps to 2,497 fps. Winchester StaBALL HD gives the best case fill at 98 %, and 7 of the 7 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (260 MPa), the top charges use 85–90 %, leaving at least 10 % headroom. The 90.0 gr projectile in 0.224" calls for a 1:7.5 twist; slower twists will usually not stabilise this weight. Winchester StaBALL HD, ReloadSwiss RS 14, Hodgdon TrailBoss rank at the top here: for 5.6 x 70 R with the .224 | 90gr | Sierra HPBT MatchKinging 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.