The .575 I have shot in a Jebs. Excellent. I can't speak for the .585 but seems I have read on here people who have and obtained excellent patterns. The .562 Sumtoy does great with 9s. I use either the Sumtoy or a .570 Jebs in my Affinity with the 9s. Either will do little over 300 at 40 yards in a 10" circle...your gun may be different, but trying things is half the fun....