You bought the Taurus Judge I assume. I'd be very interested in any ballistic tests you do. I read a very nerdy review (good thing) of the gun using a variety of .410 rounds. I can't remember which one came out on top (I'd look for the link, but I'm on a blackberry so I really can't do much browsing).
Anyhow, hope it works for you and stay safe FRiend.