I understand that a tournament can declare a one ball rule, requiring the same brand and type of ball be played for the entire round. Doing some research, I can find nothing that would stop a golfer playing without the one ball rule declared, to voluntarily change brand and/or type of ball between holes. We all know the example of hitting the Velocity on the 440 yard par 5 and then using a Prov1x for the 135 yard par 3. I understand replacing a ball when the rules allow (e.g. ball in water hazard) but did not realize that you can switch between holes and have a valid score for hadicap purposes.
The groups I have played games with (Nassau's, Skins, etc.) never allowed someone to replace their ball on the tee depending upon the characteristics of the hole - you basically played the ball you played until it was beat up or lost. - which apparently is wrong. Am I misunderstanding the rule? .