Originally Posted by
Chill Wills
For what it is worth, 20 years ago Lee Shaver and I were talking in Raton about duplexing smokeless powder with black powder for Longrange match events (800, 900, & 1000yds). It was legal for NRA matches then as well as in the Canadian matches.
He had told me he experimented using his match load three ways. Putting the smokeless on the bottom/BP on top. Putting the BP on the bottom and the smokeless on top and last he mixed it all up and dropped it in the case. His observation was, it all shot the same.
I have used it both smokeless under BP and mixed. I could not tell the difference. I quit there.
One other quality duplexing may help with is making poor powder shoot better. I learned this shooting with Dennis Bruns last century.
-There are a lot of right ways to do this..... Have fun and be safe.