I have been testing double shotgun impact points for all the years I've been interested in them. Most of the time I use a rifle rest, on a bench and put my hand in between, holding the forearm. The results closely follow what I get standing on my hind legs but are far more dependable. I have never observed the cross firing that pops up every time this topic is raised. I have to wonder if the folks who bring it up have seen the cross firing, first hand? Question is asked with all due respect, of course.