At one of the clubs where I shoot, we practice the transition mostly for improving our tactical skills in a competition format. We have actually used one course of fire where you carry and fire all three firearms in one string. It had lots of movement, using the whole 100 yard range from 100 yds. down to about 5 yds. Not real practical, but what a blast. This was done mostly for fun.
We use these mostly as a learning experience.
We aren't IDPA or USPSA. Just trying to learn good defensive tactics.
All of the IPSC 3 gun matches I've ever shot in had you using only one type firearm per scenario/stage.
[Edited by Cat on 01-18-2001 at 10:17 PM]