Load Specifications
Load data in caliber 5.6 x 70 R with .222 | 52gr | Frontier PH Phlanx 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% | 32,242 psi | 86% | 2949 fps | 97.2% |
| Alliant AR-Comp | <<locked>> | 82% | 32,866 psi | 87% | 3012 fps | 99.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 33,185 psi | 88% | 2165 fps | 100% |
| IMR 3031 | <<locked>> | 84% | 33,518 psi | 89% | 3031 fps | 96.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 33,156 psi | 88% | 2215 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 33,011 psi | 88% | 2972 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>> | 82% | 28,007 psi | 74% | 2825 fps | 95.3% |
| Alliant AR-Comp | <<locked>> | 80% | 30,850 psi | 82% | 2953 fps | 98.7% |
| Hodgdon TrailBoss | 8.8 gr | 80% | 24,149 psi | 64% | 1939 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 31,459 psi | 83% | 2969 fps | 95.4% |
| ReloadSwiss RS 14 | 9 gr | 80% | 24,250 psi | 64% | 1985 fps | 100% |
| Vihtavuori N135 | <<locked>> | 82% | 29,008 psi | 77% | 2854 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 16 powders for 5.6 x 70 R loaded with the .222 | 52gr | Frontier PH Phlanx. IMR 3031 delivers the highest muzzle velocity at 3,031 fps; across all powders the maximum-charge window runs from 2,165 fps to 3,031 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 16 of the 16 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (260 MPa), the top charges use 86–90 %, leaving at least 10 % headroom. The 52.0 gr projectile in 0.222" 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 .222 | 52gr | Frontier PH Phlanx they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 4064, Lovex D073.6, Norma 202 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.