It's not a base malt. You would probably use up to a pound in a 5 gallon recipe with other grains.
Pale Ale - 0.5 lb
Amber Ale, Brown Ale, California Common, Porter, American Stout - Maybe up to 1 lb
Scotish Ale, Scotch Ale, Old Ale, Barleywine, Imperial Stout - 1 lb
edit - I'm an idiot, it's caramunich, not just caramel 60
You could still use it in these beers. Caramunich is also good in bock, doppelbock, dunkel, dunkelweizen, any amber lager. A number of darker belgian styles.
Basically any beer that you wan to add some carmelly sweetness and a slight amber color to would work.