Just as Bob And Terry have said, when I had fellows in my shoppe and they were complaining of the same thing I would have them shoot and watch, you can do the same with a little video camera. Many are shocked the first time they do this and see for themselves what they are doing. I found filming them also helped a lot with target panic and various other issues.
Some fellows also are shooting shorter nock to nock length bows which decreases the angle making it harder to get a clean release without some jump off the string.
Best thing to do is as mentioned concentrate on pulling your bow back with back tension not hand/arm strength ( Best way I found to get guys to do this is to think of pulling back your elbow just at time of release and always push toward the target with your bow arm slightly as you do)
I too shoot only with a Damascus glove and have over the years developed a callus on the outside of the ring finger but the pull thru helps get rid of it, along with dramatically improving your accuracy, if your are shooting shorter length bows then you will have to also concentrate on using that finger less after the intial draw to your anchor.
One way to that is to practice the roll of the fingers on the bow string as you draw, if you are shooting one finger over and two under this lets you apply a little tenion to the arrow nock area so that you could literally shoot the bow laying flat shelf side down with little fear of the arrow falling off the shelf. If you shoot three fingers under it will help eliminate the ring finger being applied to heavy to the string.