At one time the Panda had a flat faced bolt, no cone. Not sure when this changed, but I remember looking at one for sale at the SS a few years ago and someone made the comment that it was an older model with the flat bolt.
Give Kelbly's a call, they are very good to deal with.
IF your Panda;
-Has a coned bolt
-AND the measurement from the face of YOUR action to the face of YOUR bolt with the bolt completely closed is 1.115"
-AND the barrel(s) in question were chambered to the above headspace dimensions
-They SHOULD fit
-SHOULD
Were it me though I would get GO and NO GO headspace gages for that chambering and test first with them.