I recently had some success duplexing H50BMG and a variety of kickers in a 405gr bullet in .45-70. I am curious now if a similar development procedure is possible with a 500-535gr bullet. I would figure that the additional inertia buys the powder time to burn a bit longer in the case and down the barrel. Initial guess: the kicker charge level that ensures complete burn will be lower than with a 405gr bullet?
Has anyone tried this method and what kind of main charge would be reasonable to start with? I am aware that this reloading subject is controversial but I am seeing that if done safely, it's an incredibly effective method and very interesting to experiment with.
shoe