What is the minimum arrow length that I can shoot with my crossbow?

Most Wicked Ridge, Horton Crossbow Innovations, and TenPoint crossbows were designed to shoot arrows with a 20-inch minimum length.  

EXCEPTIONS:  The TenPoint Vapor crossbow must shoot an arrow with a minimum length of 22-inches.  The Wicked Ridge Ranger, Lady Ranger, and Ranger X2 crossbow models can shoot an arrow with a minimum length of 18-inches.