36 cal is about the most popular small bore out there. Alot of squirrel hunters like them.

Personally I like a .40 cal.

.40 cal makes a nice middle of the road MZ. Sort of small for deer but loaded correctly and with proper shot placement it will do the job. My buddies in the NE take deer every year with a double ball load with theirs.

It is excellent for small game. Ive killed dozens of squirrels with my .40 Cal Green Mountain Renegade. All things being equal the .40 cal have proven themselves to be the most accurate of the MZ's by nature winning more of the matches than any of the other calibers.