• Version? -- 41.73 Stable
• Singleplayer/Multiplayer? -- Singleplayer
• Host or dedicated? -- Singleplayer without any servers
• Mods? -- No mods
• Old or new save? -- New save
• Reproduction steps:
1. Launch in debug mode, spawn in the world with no zombies
2. Find a house with a window, use item list menu to add a 9mm Pistol and a couple of magazines with bullets
3. Start aiming, come close enough to a window to see it being highlighted, but right at the edge of your aiming range
4. Change your Aiming skill via debug menu
5. Walk around and see that your actual aiming range, based on window highlighting, doesn't change with Aiming level -- even though the debug aiming cone does:
• Video: