Ok, I'm at the point of choosing a mold, I measured my cylinder and all 5 were .511. From reading on this forum I believe I should choose a bullet diameter of .512.
So do i get a mold of .512 diameter? or to allow for shrinkage, should i get a larger diameter and plan on resizing down to .512? Gas check or no GC? not planning on velocities over 1200fps.
If it matters I would like a finished weight of around 400 grains.
I did try to search this but didn't see definitive answers. so apologies in advance. Unable to change title to say mold size.