A local range is going to be hosting several Three Gun matches this year. While have shot a considerable amount of USPSA matches and several Rifle/Pistol matches, I have zero experience with shotgun outside of a previous job. I purchased a 930 JM Pro and will be working with a friend on the fundamentals of shotgun manipulation for Three Gun. Where I am at a loss is gear. I'm looking for recommendations for quality yet relatively inexpensive (yes I know those two aren't often synonymous) shell holders. And I am uncertain as to whether I should run said holders via a belt or off of my current chest rig. Thanks for the input.