hmmm very interesting....ive shot many full autos and some with the 3rd burst...never put them on paper...i put them on silloets just spraying away but thats about it...im one of the lucky teenagers that get to play with machine guns......more than half of my school would tell me to own a machine gun is illegal...after i was telling my friends after my first time they told me it was illegal...but its not and all the guns have all their paper work....they are very fun to play with...unless you have very good muzzle control i dont think youll get anything impressive...maybe an inch at 50yds if your really good with a 3 rd burst...thats just a guess on what ive seen...maybe next time i get to play i will see...thats a good question......