Thread: Never had this happen before.... Help

Was working out coal/seating depth for the new rifle (270WSM)
And when trying to seat the projectile in an empty un primed case I felt resistance but hadn't had the seating rod hit the bottom of the die yet ? So I gave it a few more newton's and this happened. Anyone able to shed some light ?
Set the die in the press (Lee breechlok) screwed it down till it just touched the shell holder at full extention as I normally would and the case was crushed when trying to seat the projectile.
As mentioned I felt resistance before getting full extention and the die was not yet touching the case holder.
Sorry if this is a noob mistake