Yes, 3-gun is a timed sport. There are moving targets...
What I'm saying is these guys shoot so fast or move from target to target so quickly that a slower cycling bolt "could" mean a slower time for them.
In other words if a shooter has to wait for his bolt to cycle when he's already on the next target... and wants to move to the next and the next one... Well, It's the gun slowing him down.
http://www.youtube.com/watch?v=TP8cZ-xqnZI