3 yards. Sure. With a ton of practice. Out at 10-12 yards hitting empty soda or coffee cans could be done with practice to impress and that's a stunt. I've done a lot of it in the past and occasionally still do. It sucks. I don't know that this particular technique per se made Bill Jordan someone not to be trifled with.
But the douche (still owes me the $ for the toothpaste, breath mints and disposable camera I ran out to buy him before day one started, but his wallet was always elsewhere all weekend) that taught PS at the first WarriorTalk symposium (2002?) at Rangemaster years ago was doing this out at 7 yards with students and the hits were ankle to crown of head or somewhere. Tom Givens was spitting tacks re the topic during out classroom stuff with him.