Interaction of a warhead/projectile with a concrete target is a very complicated phenomena and no theory predicts practical and realistic results. The L/D ratio and CRH value of a concrete piercing bomb/warhead disillusion its designer to a great extent. A detailed experimental study was undertaken with a high velocity model warhead of CRH value one and an L/D ratio varying from 3 to 9 on concrete targets. Projectiles have been recorded ricocheting, penetrating or perforating the target. Critical values of impact angles for no-ricochet of projectile of different L/D ratios have been computed from the trial data. Values of critical angle of no-ricochet have been found to reduce exponentially with the L/D ratio and finally following an asymptotic trend.
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