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| Group (n = 12) | Diameter (mm) | Weight (g) | Velocity (m/s) | Energy (J) | Absorbed energy (J) | Absorbed efficiency |
|---|---|---|---|---|---|---|
| 1 | 5.56 | 2.57 | 355 (18.7) | 162 (7.3) | 100.3 (17.4) | 61.9% |
| 2 | 5.56 | 2.57 | 349 (22.7) | 157 (9.4) | 103.6 (18.3) | 66.2% |
| 3 | 5.56 | 2.57 | 347 (15.5) | 155 (6.6) | 99.1 (13.3) | 64.1% |
