Yes - of course, the underlug is a problem as is forend pressure. As far as the pot-smoking part, the guy has an MS in aerodynamics from the University of CO, and was director of the aerodynamics department at Sandia National Laboratories. His interest in rifle ballistics grew out of a hobby that he has pursued over 45 years, big game hunting. Check out the book if you ever get a chance. If you are more technically inclined, he includes all of the equations and schematics for the equipment he set up including wiring diagrams. Hope to try some of his suggestions. He was experimenting primarily with bolt guns - but some info should also apply to Handi Rifles.