Designing the 2-diameter paper patch bullet.

[Kurt]

Jim I like that bullets hemisphere for long range. Most of my moulds I use for long range shooting looks very close to yours but what I found I had to keep the ogive shorter than the shank or that bullet would show instability cutting oval holes at around 900 yards when the winds picked up. I had Paul Jones shorten the radius because the 18 twist was not rotating it enough and I could not make the shank any longer because I was right at 1.450" long.
These bullets I tested different alloy mixes to hold the setback.