Designing the 2-diameter paper patch bullet.

[Don McDowell]

Jim I think you're right the dual diameter bullets can work extremely well in todays "standard" chamber, and I think they leave a much cleaner barrel than the singe diameter bullet.
I do find that with the dual diameter 45 bullet Brooks made for me that some rifles will shoot them better than they will greasers or regular patched, but I have one rifle that absolutely hates the things and will sling them into the target sideways at 600... Not going to give up on that rifle and dual diameter, even tho it shoots regular patched better than any greaser you can put thru it.. Just has to be a matter of finding the right load/wad combo.