I would say Sumtoy would be a good place to get a choke. I have a .572 undertaker in my sons Mossberg super bantam and this combo covers 40 yards easily. My son tagged out during youth season last year. I left my brand new 835 in the cabinet the rest of the year and tagged out with my sons 20ga also. Good luck getting this gun dialed in. I would also like to know how you like the Weaver sight as I am considering getting one.