"ShotBuddy" iPhone App Enhancement Question

Last December I wrote an iPhone app “ShotBuddy” to maintain a list of guns and record accuracy for each, based on selected targets. It caters for common ISSF/NRA type targets, recording using metric and imperial measurements, graphs shot string variations and even analyses pistol shot results. I was quite pleased with the results, but am planning to enhance it to include recording multiple targets like the Extreme Bench rest style targets. What would be great to know is what are the most common multi targets do you use (e.g. NRA_A-50, NRA_A-51 & NRA_USAS-50)?