I have a 24 inch on my 835 and a 26 (i think) on my 870. Both have extended tubes and do well. I have know experience with very short barrels, but lots of guys like them because of a slight reduction in weight and carrying ease.
I shoot Win supreme XX 2 oz 6's (red shell) out of the 835 with a Mossy extend xtrafull choke and average upper 140's in a 10 inch at 40 yards, best is 157.