remington high velocity hp. the cz craves them and in thick woods, they are better at reducing post fall ground travel, which can cost you a squirrel if you didnt mark your kill tree well.
That little .36 ought to get her done. My little .40 has sent many critters to their maker with the load I stated...rabbits, squirrels and armadillo's are the main ones. Still have the first roundball I took out of the first dillo I ever shot with her. Thing was looking right at me...not moving so much as a hair to avoid detection. Put one right between the eyes on it. Got home to clean it and that's when I found the roundball...lodged in the base of the tail.
Thunderbolts is the most accurate ammo I have shot out of my model 60 marlin. I try and only take head shots at squirrels so they work well for me. They don't do much on a body shot though.