Of course, I’m not the first one to think a Sears-Haack body would make for an interesting experiment in low bullet drag. I just refined it and added a driving band and some seal areas.
This is a rough drawing of how the bullet will look. As expected it is very long for the calibre. With the noted material it should be in the 400gr range and might require a better than 1 in 6″ twist to stabilise wich is very fast.
Here is a rendering of it:
Next step is to decide on a launching platform