Thanks Mike, that sounds like my grip issue as well, I'll try the fingertip hangs.@lais817 When I wanted to Swing the Beast some time ago I had a grip issue too. What helped me, and maybe it will help you, was hanging. I did Fat Gripz Hangs, Rope Hangs, and Fingertips Hangs. The last Hang was very halpful as I noticed that my grip is failing by opening grip during swings. Try it and me know.
Mike