Baco 438470

[JKR]

Yes I do. I prefer and my rifles agree that a bullet with some neck tension shoots best.
I also find tha shooting patched in a standard chamber the cases don’t expand quite like they do with a greaser.
If the size die sizes the case to tight for the patched bullet then I use an expander die that expands the mouth to .001 over the patches diameter

Don,
I’m a bit surprised by this. How much tension are you actually using? Is it enough to require a seating die?
My experience has mainly been with the 45-70. Of course, with the match load, the bullet is barely in the case so just enough neck tension to hold on to the bullet when it’s handled.
I’ve also developed a good shooting, short range, load with a 400 grain, groove sized PP bullet. It seats deep like your DD bullet. It does not like any neck tension and gives very nice accuracy if slip fitted in a fire formed case.
It looks like you’re on to a great shooting load! It sure is satisfying when we hit upon what these rifles like!
Jim