Great choke. I think you will be pleased.
One word of caution. I have a 20" barreled 835, and it is a struggle to get huge numbers out of it. My SSX throws a beautiful hunting pattern, but the numbers are not huge, and considering the load, probably low.
So if you get a nice even killing pattern, I would leave it be. Anything over 100 in the 10" circle at 40 is gravy anyway.