Designing the 2-diameter paper patch bullet.

[Kurt]

TNX. Jim.

I really like the ogive on that bullet it's very close to a prolate as you can get. I was wondering on the fine boring job how you ground the bit. I used a drill rod softened it and did a lot of grinding and filing and stoned the final edge with an Arkansas after re tempering the rod. A lot of work for a retired plumber LOL.

A Duel diameter bullet definitely has a place shot in a standard GG chamber, saves the brass and they work. I had a Corbin swage die made for the .50 that was a 2 diameter tat patched the base to groove and it shot very good in the .50-90 but When I ordered the Die from Dave he warned me not to use to hard of an alloy or you will blow off the base and he was right, 1/16 with his dies in .50 calibers for the S press is to large. But they shot very good.
I also have a press and dies from Richard Corbin and those dies use a 7/8X14 thread and this makes the die a lot stronger and I always thought I would have Richard make a two diameter die but anymore with the custom mould makers we have now days I can cast a bullet just as good as a swaged for a lot less cost. When I started swaging the bullets I wanted to use the moulds were not available.