I’m standing in a waist-high grouse butt at the Royal Berkshire Shooting School in rural Pangbourne, England. Jonathan Irby, the school’s Managing Director, really wants me to make this shot: an incoming formation of four clay targets strafing the scrub at about 50 miles per hour. In a way, this shot is a test to see if I have the stuff for hunting the 20-ounce, acrobatic, mind-bending red grouse that can burst to speeds of nearly 80 miles per hour – exasperating wingshooters throughout the U.K. for the past 150 years.