I seem to remember hal talking about it being good to 52 yds if leaving at 1100 fps. Do not quote me on it.
I shot 9.5s for a while, when I started that was all that hal had, they worked great, I do not shoot long distance and did not notice any difference when switching to 9s.
Not sure what the small batch is, lighter load I assume? At reasonable distance it will perform I am sure, most guys use 10s for the 410 to up pellet count. 9s seem to be the best shot size for typical loads.