I've been working on a couple of new products and been having issues cutting 3/4" birch ply.
I've cut it many times before for jigs and didn't notice problems, but now that I'm trying to tweak production files I'm finding that birch is a lot tougher (denser) to cut than the poplar or pine core plywood that I usual use. My PC router is bogging down when I cut and dropping my feed rates leaves my bit burning hot. (I know... a spindle wouldn't have this problem. But, that's not in the cards at the moment.)
Ermino mentioned Apply Ply as an possible alternative to the birch, but neither of us have much experience with it.
Anyone cutting apple ply or some other thin layer/voidless core material that isn't as tough as birch?