With most modern guns there is no "break in procedure." Just shoot the gun. (Some folks like to field strip it before firing the first time, and remove excess oil, etc.)
The trigger will slowly improve with time -- and that's about the only "break in" the gun will need. (Breakin can be accelerated by getting a gunsmith to do a trigger job, but it isn't necessary.)
As for the firing pin block -- the 85 Combat does not have the firing pin block -- and that's good!
It's the 75Bs (with the FPB) that probably shouldn't be dry fired (unless you use a snap cap.)
With the Combat you don't have to worry about damage. Dry-fire away.
Re: dry firing the Kadet Kit. Don't.
Generally speaking, you shouldn't dry fire any rimfire weapon.
(There are exceptions -- such as the S&W Model 41, and all Ruger semi-autos -- which have firing pin retaining pins.)
As far as I know, the Kadet kit does NOT have a retaining pin for the firing pin, and that could lead to chamber damage if the gun is dry fired. (Perhaps I misunderstand, and someone with more direct knowledge of this issue will set us all straight.)
