This simple mod changes default zoom level on sniper rifles from 1 (lowest) to 3 (most common default zoom level). Was created because zoom level 1 is small enoguh to make even biggest reticles hard to see on most non-sniper sights.

Installation:

• Download and install BLT.
  
• Unzip the archive with the mod into \Steam\steamapps\common\PAYDAY 2\mods
  

Also check out Higher Magnifier Zoom mod by Iron Predator.