I've tried several different grips on my 686. So far the Pachmayr compact grip work best for me. I do not care much for finger grooves -- they never seem to fit right but force my fingers apart for a less secure grip
Its personal...... the Hogue and other finger grove grips never seem to fit my hands..........my little finger is forced away from my ring finger.
That said....... single finger Grove Hogue's and Spegel grips do fit my hand.
For a lot of magnum shooting,years ago, I modified a 686-no dash to round butt so I could use the Pachmayr Compact grips shown above.......