Try a different grip (way your holding it grip). Follow the link and try to hold it how Jerry Miculek demonstrates. It may not be the grip but how your gripping it.
MICULEK2
If you want to try or check out some of his other revolver tips, follow this link. It could be in your stance also. I was surprised at all the possibilities that can affect ones shooting...
JERRY MICULEK
Of course, you can get a new grip anyhow and then try his method/s. lol