Acknowledgements
The authors are grateful to Stefano Pistono (ballistic examiners, Gabinetto di Polizia Scientifica per l’Emilia-Romagna) for experimental ballistic tests.
We would like moreover to thank Schaefer, Gesellschaft fu¨ r Bild- und Signalverarbeitung (GBS) mbH and Paolo Bariani for to use the profilomiter analysis, the support and the fruitful discussions.
LC would like to thank the Spinner 2013 program for the support.