Cast Lead Thread ?

[338MAN mk2]

The big hollow ensures a big hole at subsonic speeds.
The mold has 3 nose pins to make a big hollow 330gr, a shallow hollow 350gr and a 360gr flat nose.
I think the 350gr cup point shallow hollow will be good for moderately super speeds.
The 330gr hp is giving up a bit of paper figures smack at subsonic but has an advantage of needing less powder to push it and then has less noisy gas. Surprisingly quiet out of a suppressor