Here comes the newbie again.

I have an extruded circle 0.250" in diameter, meeting a triangular shaped body (think arrow shaft and arrow, respectively).  The Arrow is only 0.200 thick so a bit of the diameter of the shaft extends beyond the surface of the arrow.  I'd like to create a nice filet or at least a ramped joint there rather than the blunt face of the cylinder/shaft.  How can I do that?