Today we went to the Crofton go-cart track. It is the largest in Maryland at 1/2 mile long with 20 turns. It was very exciting, especially since my grandson got to pass his granny on the straightaway. He couldn't wait to tell grandpa. I only let them pass me once, though, as granny has some track experience of her own.
I used three different sets of settings as I took photos of the boys on the track. I felt a bit like Goldilocks as the first settings were too blurry, and the last settings were too noisy. The middle settings were just right. The 70-300 seemed to do a great job of capturing the quick moving go-cart, as long as the setting was correct.