The interrupt system in Build 091 is bugged for shotguns. The trainer fixes this by forcing an interrupt chance multiplier (usually set to 10x).
Prevents weapon magazines from depleting, though reload animations may still trigger. jagged+alliance+back+in+action+build+091+trainer+top
(like Blue Dawn) that rebalances these builds, or are you looking for a direct cheat table for a specific version? Jagged Alliance: Back in Action Opening Moves Guide The interrupt system in Build 091 is bugged for shotguns