Going by my experience w/ Ducks, I'd say 25 at above 260 is a decent estimate. It would be about what I'd expect when tuned for indoor play.
Now if it's 285+ then I'd go on the field assuming that the 25th to be under 250fps. I'm looking to dump my 12g after the 20th if I have the opportunity.
Never liked bouncing balls on people who I had put a good shot on.