Hi and welcome, like yourself I also shoot with an S410 but in 22. I have found that the best pellet for me and my gun has to be Air Arms field, they give good groups and work great on feather and fur.
Have tried other pellets before but these work best for me! what I would say is once you have chosen a pellet that works for you stick with it, cause another make or even size may not hit that zero the same each time you take your shot.