Second Chance runs 6 tables, some clubs run only 3. A start signal sounds, generally an electronic timer's buzzer. Then the competitor moves to the next table, shoots and clears his firearm. Then the shooter steps out of the firing area and reloads his magazines or does some relaxation stuff while a couple of people go out and set up the pins. Then, once the range is set up and clear, the shooter and timer go back to the box and shoot the next two tables.
Timing is done in one of two ways.
The original and most common way, especially among big-bore shooters, is to use a person with a stopwatch. The timer starts his watch at the start signal, and stops it when the last pin hits the ground. This method can allow for some suspenseful gambles as the shooter watches a lonely pin teeter on the edge of the table or slowly roll along the remains of the other fallen pin brethren, before finishing it off with a volley of lead. The more modern method, popular among the raceguns and .22 classes, is to use an electronic timer. This device measures the time between shots, so it stops counting time after your last shot.