Greg, This isn't real easy to analyze without seeing. ONE suggested standard for finger pressure is to have 50% of the weight on your middle finger, 40% on the index finger and 10% on the PAD of your ring finger. The ring finger is really just along for the ride and is used to help with hand alignment more than for strength. You are kind of doing that by going with just two fingers. Don't try to keep a deep hook with the ring finger, just keep the pad of the finger on the string.
IF you TRY this, Start with the weight distributions at the start of the draw and try to keep that distribution through out the draw and release. As always, I would RECOMMEND that you do this on a close up blank bale and just work on the "feel" of the string on the fingers. Don't try to hit anything initially until you start to FEEL the distribution.