You're going to get several suggestions to those questions. My opinions' only: Start at say 20 yds (get yourself some turkey targets, remington has some you can download), move in 10 yard increments out to at least forty yards. Buy at least 3 different shells, say, #4, 5, & 6s', try all three at the same distances. Count the numberof pelletholes in the killzones and recordeach. As for chokes, you'll just have to buy one and see what it will do. Myself, I bought 3 before I was satisfied with one. Once you get finished, which choke tube and loads had the most pellet holes in the kill zone for each distance. Now you'll know what to use.

dog1