Of course it is. If you're making changes it's because you are already missing shots. You don't make a ball change on a string of strikes very often do you?

Usually when I start with a ball, I stay with it for all games. I have a spare ball, but hardly ever use it as it takes much concentration on using plastic vs. my hook ball. I use my HyRoad the most lately. It's comfortable and I seem to understand it, although I have a 2Fast, Lane1 Chainsaw and Original Cell, but they don't come out as often as they used too. I've been working on my approach, speed and stance when the pattern changes. Seems to be working as I've improved my average by 15-20 pins in the last few months. Been wanting a new go-to ball though. Guess that is normal for any bowler who wants to improve.