I bet you have seen that at the CHP ranges - lots of troopers over the years, eh?
I've seen some folks short-stroke a pump gun <click>, but not jam it. Newbies on doubles after they miss a few and get excited/in a hurry for the second clay bird. Mind you, I'm not claiming they cannot be jammed; just that I have not seen it happen. IMHO it is easier to jam a non-plunger ejector bolt gun with a short or lazy stroke than a pump shotgun. But I digress...
I really don't have anything against a double barrel for Fabio to consider. But a GOOD double is expensive (and not an option for him). And those Boitos are heavy - at least the two samples I have used. I sure like how they point and swing and the barrels are regulated quite well in terms of the bead and each other. At the range, I like the fact that they have extractors rather than ejectors. Hunting or defense - I would prefer ejectors. Not that it has been an issue when I've taken mine hunting; just a preference.
If he gets a double, I suggest carefully checking headspace on both barrels (make SURE the rim counterbore is not too deep), check firing pin protrusion on both barrels (make SURE one is not too shallow), and learn how to fix it if it goes sour. Ask me how I know...
No idea of the design/build quality of the pump guns available to him. There are very good quality guns built there these days - Taurus, of course, and perhaps some of the Rossi line. It's possible that has rubbed off on Boito - again, no idea of the CBC.
In the end, it's up to him to choose something reliable that he likes. Even a single shot 12 gauge is very effective and practice with rapid reloading gets surprising results in the field (forget skeet doubles <grin>).
Best regards,
Tom