I usually go with 00. I would imagine whomever was on the receiving end wouldn't know the difference between 0-4. 00 seems to pattern fine out of my 590 20". My hallway is about 18' long. The length from the top of my stairs to my foyer is maybe 20'. These are the ranges I'll be shooting this gun at, God forbid. Anything taking a hit at those distances is going to be having a bad/last day.