Load data for .223 Rem. + 55gr Lehigh Defense Controlled Chaos
Based on SAAMI, the max. allowed case length is 1.760 in / 44.70 mm, the max. cartridge length is 2.260 in / 57.40 mm, and the max. allowed pressure is 55,000 PSI / 3,792 bar.

Based on SAAMI, the max. allowed case length is 1.760 in / 44.70 mm, the max. cartridge length is 2.260 in / 57.40 mm, and the max. allowed pressure is 55,000 PSI / 3,792 bar.

Load Specifications
ImperialMetric
Cartridge:.223 Rem. load data
Case Length (L3):1.759" | 44.7 mm
Cartridge Length (COL/L6):•••
Seated Depth:0.367" | 9.3 mm
Case Capacity:30 gow | 1.94 cm³
Primer Size:Small Rifle (SR)
Max. Pressure (SAAMI):55,000 psi | 3,792 bar
Barrel Length:24.0" | 610 mm
Min. Twist Rate:1:9.0
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Community Loads for .223 Rem. + 55gr Lehigh Defense Controlled Chaos
Real loads for this combination shared by our community. Charge weights are only fully visible with an active Pro licence.
| Powder | Charge (gr) | C.O.L. | Barrel Length | Velocity (fps) | Pressure (psi) |
|---|---|---|---|---|---|
| 19.3 gr | 2.260" | 25.0" | 2716 fps | ••• | |
| 21.9 gr | 2.260" | 25.0" | 3004 fps | ••• | |
| 19.3 gr | 2.260" | 25.0" | 2595 fps | ••• | |
| ••• | 2.260" | 25.0" | 2978 fps | ••• | |
| ••• | 2.260" | 25.0" | 3037 fps | ••• | |
| ••• | 2.260" | 25.0" | 2864 fps | ••• | |
| ••• | 2.260" | 25.0" | 2825 fps | ••• | |
| ••• | 2.260" | 25.0" | 3108 fps | ••• | |
Charge weights beyond the first rows and all pressure values are only visible with an active Pro licence.