Nikon D300 User Manual page 731

In the good-old film days, some of the release modes would
have been called motor-drive settings since they are
concerned with how fast the camera is allowed to take
pictures.
We've already talked about these modes to some degree in
the consideration of the AF-area modes.
Single Frame (S) Mode
This is the simplest frame rate since it takes a single picture
each time you press the Shutter-release button fully. No speed
here. This is for those shooting a few frames at a time. Nature
shooters will often use this mode since they are more
concerned with correct depth of field and excellent
composition.
Continuous Low Speed (CL) Mode
This mode allows you to select a frame rate between 1 frame
per second and 6 frames per second (FPS). If you have an
MB-D10 battery pack mounted on your D300(S), you can
also select 7 FPS. The camera cannot shoot over 6 FPS
without the MB-D10 battery pack, although it will allow you
to select 7 FPS. The default frame rate from the factory is 3
FPS, which seems about right for most of us. If you want
more or less speed, simply adjust Custom setting d5 in the
D300S or d4 in the D300 and select your favorite frame
speed.
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