so, i went to the gun store to put my paws on a smith 686 plus. I wanted to see the 3" and the 4" barrel. I'm really torn on which one i want. Anyways, one of the guys in the store told me that the 4" barrel had the square butt, and the 3" had the round butt. The only reason i'm concerned, is because i don't like the grips that are on the guns on the smith website so, i'm curious as to which grips i'll want if the butt shapes are different. Can someone please clarify for me? thanks...........hvychev77