brass generally likes things a little slow that AL but faster than steel maybe 125-150 sfm with hss and zero top rake on cutting tools. drills and single point tools should be ground with zero rake. fortunately, you don't have to worry about zero rake on end mills (it would not be easy to do anyway), but the cutters do have to be sharp. Tradition has it that from files to milling cutters, once its used for steel, its not sharp enough for brass.
follow the above, its a pleasure to work and cuts like butter