So, about an hour into a practice session at home let's say on average I can break and run 3 out of 10 nine ball racks and 4 out of 10 eight ball racks... When I head to league it gets cut in half on a good night and some nights not a single runout.
Wondering if any others seem to forget the little routine you develop when practicing when a match goes down? Note: I'm a 6/7 SL sometimes
Also - I do have nights maybe once a month I can put a two or a three pack together so it's not everytme
There are many factors that can affect the difference you've noticed, such as equipment, environment, pressure level, rhythm, and pure chance. I want to elaborate on the rhythm piece because that is a major factor and something you can control to an extent.
When you're practicing by yourself, you can usually fall into a good rhythm at a fast tempo, which lets your mind and body use your automatic abilities better. During competition, you are typically shooting at a much slower tempo because you have to wait for your opponent. Also, there is more at stake, so you should be a little more careful than during practice, which can also slow your tempo down.
You have to get used to this slower tempo, so I recommend you take a break every 1-2 racks during practice. This will allow you to simulate being in competition a little bit better.