Bullet tension

[JKR]

I resize the case, chamfer the case mouth and use a custom expander that is .001-002 over bullet diameter , so the spring back from expanding leaves the case exactly (more or less) the diameter of the patched bullet.

So Don, you’re saying that you don’t do anything at all to tighten the mouth after seating the bullet?
How deep is your bullet seated? Can handle the cartridge without the bullet falling out?
Jim