Loophole Calculator
Your scope lies when shooting through windows. This calculator shows where the bullet actually goes so you clear the frame.
All Tools →When shooting through a window, port, or any small opening, the bullet does not travel where the crosshair points. At close range to the aperture, the combination of scope height and dialed elevation creates a gap between line of sight and the bullet path.
Enter height over bore, distance to the loophole, the elevation dialed for the target, and the size of the opening in centimeters. The calculator shows exactly where that gap is and whether the round will clear the obstacle.
The visual display shows your sight picture with the aperture and bullet path overlaid, updating as you change inputs.
A range estimation tab handles mil-based calculations and a unit conversion tab handles metric/imperial conversion.