Light primer strikes, ah yes.
I had that problem some years back and again recently with a different gun.
After an embarrassing investigation [a long story] I found that my primer-seating operation was in question.
When I changed it a little the problem went away both times.
What happened, you ask?
I wasn't seating the primers deep enough and the firing pin was pushing them the rest of the way in without getting a deep enough hit to ignite the primer.
A loose fit in the chamber will exacerbate the situation too, common for revolvers.
Take a good look at your primer-seating procedure.
Your tools may need "adjusting" of some sort or even replacement.
The fact that the Puma rifle doesn't do it means little if only an occasional primer is seated just a wee-little-bit too shallow.
This will often make hang-fires too, I've been there too.
It was always the primer-seating situation from my experiences.
You might also have some crud in the firing-pin recess.
It happens, even with new guns.
There are more possibilities but I think of these as " usual suspects."
