I find that if a glove is stretched tightly over my fingertips, it doesn't have as much of a tendency to groove, plus in general seems to shoot better. In a lesson with Rick Welch, he wanted me to try a glove rather than the tab I was using, so he loaned me his glove. I was surprised that it fit me, as his hands are bigger than mine. He said he always buys a size smaller than one that would comfortably fit him and forces it on his hand until it stretches to fit. Since then, I have tried the same thing, which does seem to work better, and usually stretches to fit after being used for a few days. One didn't, and it is now my loaner glove for people who have smaller hands than mine