There is no standard figure. Shooting line means releasing line after the Stop, so how much shoots depends on how much line is already moving, how fast it is going, and how freely it runs through the guides.

• Carry. You can only shoot line you are carrying. The one figure the guide gives is tactical: for the 75 ft task, plan to shoot 10-15 ft or so, from a carry of at least 60-65 ft.
• Line speed at the Stop. Hauling adds quite a bit of line speed when done properly, which is why it is encouraged on the distance task.
• Slack. Slack means part of the line does not move and part of its mass does not bend the rod, so slack during the false casting cycle costs you the shoot.
• Free-running line. Clean your fly line so it slides through the guides easily while hauling and returning the fly line.
• Need. On accuracy casts, hauling and shooting are allowed but you will probably be more consistent and accurate without either; know exactly how many shoots extend the cast from 20 to 30 ft and from 30 to 45 ft.

Source

From Task 15 and Task 12 of the CI Study Guide (2025) (PDF); terms from the FFI Fly Casting Definitions (Shooting line, Overhang).