Yup. I'm aware of QL data on this.
This is from a guy that goes by Rocky Raab and is some kind of author. I pulled this from the Shooters Forum, were UncleNick is a Moderator as well as here. Maybe he can shed some light on these different opinions.
Actually, that's one of the major points on which I disagree with Helmut Broemel (the author of QuickLoad.) The program has an output line that predicts percentage of charge burned before muzzle exit, implying that powder burns the whole length of the barrel. No other professional ballistician believes that, as far as I know - and I've asked a bunch of them.
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