the target loads will work fine. I've shot them on many occasions. 8 shot will work fine as well, especially if your birds are closer/on the easier end of shotgun range. I tend to prefer 7.5 just because It carries distance and seems to kill a little better. but no doubt I've taken a lot of birds with 8's.
if you hunt in an areas where you get the large swarms of high-flying white-wings, a full choke with 6 will reach them effectively.