With side milling you will have rigidity issues, especially with 1.5 tool overhang. I would opt for end milling using tialn coated carbide. If it also suits use a corner rad cutter (.015) as it is the sharp tips that have the biggest issue with chipping/wear. You can use a stub length and will get amazing tool life.
Also like Neal said, for very little up front cost you could make/have made a swaging machine that pounds these through in full automation at 1 second a piece. Supposing the deformation of material displacement is not an issue. It will keep an operator (or 2) hopping to put parts in the feeder fast enough.
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