I, too, used to index the weapon on the front of my abdomen, but at least since adopting the reloading method taught by Michael de Bethancourt, have stopped holding the weapon so low while reloading. Actually, I may have gotten away from indexing on my abdomen before learning Michael's reloading method, at the Snubby Summit in 2005. I should note that I still use the more-traditional revolver speed-loader reload with weapons larger that K-Frames, due to the geometry of my hands making it difficult to keep my index finger on the cylinder while maintaining a firing grip, but I index the weapon higher than my abdomen. (At age 55, I have noticed a bit of a flexibility issue starting to creep into this picture.)
I got away from indexing the weapon at abdomen level when some instructor, be it Michael de Bethancourt or someone else before him,
advised a higher index to mimimize the chance of looking downward. Even though I had always trained to reload while keeping eyes down-range, I understood the logic; if something snagged the re-load, it would be very human to reflexively look at the problem.
Disclaimer: The peak of my revolver-ing was about 2005-2006, and I have not been paying consistent and close attention to the state of the revolver art since then, though I am returning more to revolver stuff as I am in the twilight of my LEO-ing career.