I haven't strayed from using Hodgdon H110 for all my 410 loads, to include 3" 00 or 000 buckshot loads of 5 pellets. I found that the 00 buckshot does better out of my 24" full choke barrel while the 000 does better out of my 500 with an 18.5" cylinder bore barrel and my Shockwave 14" cylinder bore barrel.
How do you like your 410 Shockwave?