Jas is right - in 14 years of flying I've never targetting a certain descent rate during a visual approach to landing (an instrument approach is a bit different - but you'll get to that later). Get your aim point right and control the airspeed with power. There are too many variables to worry about a target rate of descent.
Hi Aimpoint,
I am really sorry for the confusion, this 300fpm thing (actually 5 times ground speed, so 60kts make 300fpm) is just a rule of thumb my instructor taught me, I completely understand aiming point and speed are things I should pay attention to on visual approach, never tried or think about targetting a descend rate. It might be used as another source to confirm the profile, but never targetting on it.
thanks for your comments though.