I notice that when we are in the practice segment of league night my swing is more relaxed and I get strikes with ease without trying hard. When this is going on I make a
comment to one of my teammates that I wish I could get strikes this easily during the game when it counts. When it counts I can tell that my swing will change slightly like with more speed. This changes the angle the ball hits the pocket. The job during the game then is to get into the practice swing mode and slow the ball down a little. When I do that I get solid pocket hits for strikes. When I can get it zeroed in all I have to do is get comfortable in my setup and then make my approach and just let the swing do it's
thing. When you try to make it happen it will go wrong and the strikes will avoid you.

I am sure that for a lot of us when we are relaxed with our swing and just let it happen it turns out to be a night where we feel like we have our own personal groove in the alleys we are bowling on and that we can throw a strike with our eyes closed. When I had lessons with a coach he would tell me that I was trying to help the ball to go down
the lane instead of just letting the swing and release happen on it's own after I got setup and made my approach. Don't over think your swing and release.