Drop chances

ItemStage 10Stage 50Stage 100Avg count
Paper29%29%29%2.21
Home Cooking Weekly5.2%5.2%5.2%0.05
Big Hitters5.2%5.2%5.2%0.05
Electrical Traps5.1%5.1%5.1%0.05
Rifle World5.1%5.1%5.1%0.05
Wiring 1015.1%5.1%5.1%0.05
Vehicle Adventures5.0%5.0%5.0%0.05
Pack Rat Magazine5.0%5.0%5.0%0.05
Bow Hunters5.0%5.0%5.0%0.05
Tools Digest5.0%5.0%5.0%0.05
Knife Guy5.0%5.0%5.0%0.05
Tech Planet5.0%5.0%5.0%0.05
Scrapping 4 Fun4.9%4.9%4.9%0.05
Medical Journal4.9%4.9%4.9%0.05
Tactical Warfare4.9%4.9%4.9%0.05
Get Hammered4.9%4.9%4.9%0.05
Explosive Magazine4.9%4.9%4.9%0.05
Handy Land4.9%4.9%4.9%0.05
Armored Up4.9%4.9%4.9%0.05
Forge Ahead4.9%4.9%4.9%0.05
Handgun Magazine4.8%4.8%4.8%0.05
Sharp Sticks4.8%4.8%4.8%0.05
Shotgun Weekly4.8%4.8%4.8%0.05
Southern Farming4.8%4.8%4.8%0.05
Furious Fists4.7%4.7%4.7%0.05
Super Corn (Seed) Recipe0.52%0.52%0.52%0.01
Vehicle Fuel Saver Mod Schematic0.10%0.14%0.12%0
Vehicle Reserve Fuel Tank Mod Schematic0.06%0.13%0.12%0
Vehicle Off Road Headlights Mod Schematic0.13%0.09%0.06%0
Vehicle Storage Mod Schematic0.14%0.07%0.04%0
Scope 4x Mod Schematic0.02%0.06%0.04%0
Reflex Sight Mod Schematic0.02%0.05%0.05%0
Motor Tool Small Tank Mod Schematic0.03%0.05%0.05%0
Ergonomic Grip Mod Schematic0.07%0.04%0.03%0
Wood Splitter Mod Schematic0.05%0.04%0.02%0
Barrel Extender Mod Schematic0.05%0.04%0.03%0
Weighted Head Mod Schematic0.05%0.04%0.03%0
Barbed Wire Mod Schematic0.03%0.04%0.05%0
Bunker Buster Mod Schematic0.02%0.04%0.05%0
Armor Double Pocket Mod Schematic0.02%0.04%0.05%0
Structural Brace Mod Schematic0.05%0.03%0.01%0
Trigger Group: Semi Mod Schematic0.05%0.03%0.01%0

Average count per open at loot stage 50. From 40,000 simulated opens per stage; perks that raise loot are not counted.