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In the present study,we carried out accurate quantum wave packet as well as quasi-classical trajectory(QCT)calculations for Ca+HCl reaction using recent ab initio potential energy surface(PES).The quantum mechanical calculation poses real challenge due to the presence of a deep well and the involvement of heavy atoms of the molecular system.The calculated quantum reaction probabilities show strong oscillatory energy dependence indicating involvement of many long-lived resonance states supported by the deep well.On average,the reaction probabilities monotonically increase with collision energies.In the cases of J>0,Corioli-coupling effect is found to be significant.QCT reaction probabilities have also been calculated to compare with quantum results.The overall trend is in good agreement between the two but the QCT fails to reproduce oscillatory resonance structure.