Well, they seem to be very sturdy. As for your friend's opinion I disagree. I have been feeding mine a steady diet of Norinco fodder and it hasn't missed a beat. I did try some relatively light loads that I use in my P08 that just allow the toggle to function without hiccups and it still functioned well without any jams. The surplus Nato spec ammo I had left which consisted of around a hundred mixed rounds from England/Canada/South Africa and the US all worked well but shot to different points of impact with the same sight setting.
Yes, it is a Chiappa but it is made in Italy and most of the Italian firearms it has been my privilege to shoot do their jobs very well.
I could see it giving trouble with light loads though. The return spring is quite heavy. If I were going to shoot light loads I would likely remove a couple of coils from that spring or get a spare made up at Wolf.