While often viewed alongside the Kit, (Potent Herbivore Bait, Potent Predator Bait) and Lures (Special Lake Lure, Special River Lure, etc.) typically populate the subsequent slots or separate ammo menus depending on the UI version.
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You can also buy the Master Hunter Off-Hand Holster from the Trapper immediately after completing Challenge 2 – no need to finish all 10. rdr2 equipment compendium page 2