I use the
Dan Newberry's OCW method. It suggests you wait long enough between each shot for the barrel to cool.
I feel this will give you the best accuracy. Not talking about the barrel returning to ambient temperature, just talking about keeping the barrel temperature constant. It varies by rifle, but normally spacing my shots 2 minutes apart keep the barrel a nice constant just warm temperature.
If you fire off a large number of shots, the barrel temperature will reach a much higher maximum temperature during the firing, causing more stress on the barrel and thus change in expansion and pressure from contact.
Yea, I know the hotter it is, the faster it cools (heat transfer rate will be greater), the goal is similar barrel conditions.