RE: What choke/ shotsize?
I use a HS Undertaker choke tube and Hevi13 No. 6's in my Rem 11-87. It patterns great for me but that may not be the case for you. While I recommend this tube and loads to people, you also have to try other loads and possibly tubes to find what will pattern best in your gun. I know other guys with remingtons who dont like the way the undertaker patterns. You just got to get out there and try different combos till you find what gives you the best pattern.