Was out at one of our local clubs today with a friend who is an insufferable "gadget head". He recently discovered an app and target system that ends the butcher paper on a fence and pellet counting. By far the best analytical method for patterning shotguns I've ever seen. Pick your distance, fire a shot at the proprietary target, photo the target with your cell phone and feed the photo to the app. It counts pellets, calculates % in your chosen diameter circle, shows you distance off center, calculates effective choke, kill probability with various size clays and targets! Unbelievable and instant analysis. Really a neat tool for evaluating chokes, gun fit (cast off/on, etc), etc. Recommend taking a look, here's the website.
www.targettelemetrics.com
I was initially skeptical but was impressed after spending some time at the pattern board. He and I have both recently purchased a couple of nice little Italian 410s and shot both with different chokes and ammo today, much food for thought!