Pull & Mark (Jeff),
This is an e-mail I got from Ron Reiber about a year and a half ago. Ron is a product manager at Hodgdon (besides being a nice guy and a heckuva sporting clays shooter with a 28 gauge and a .410, to boot.)
This was in reply to my query asking about his recommendations for what powder to use for .410 reloading (I had mentioned H110 and W296, specifically.)
"Any of the suggestions given to you would have made a good standard skeet load, but I personally use Winchester HS hulls, Winchester 209 primers and the Winchester WAA41HS wad with 13.5 gr. of Lil' Gun powder. Lil' Gun is a powder that was designed exclusively for the 410 and delivers top performance. We used Winchester components when we designed the powder, so it logically follows it would be ideal for the best performance. I use it for sporting clays, since that is my primary use of the 410."
Hope that answers your question.
Tim