Thread: Brass deformation - rimmed (303) vs shoulder (308)

Hello ebf. My preference is to use a 308 FL die, set to necksize 303 brass. Swap out the 308 expander plug for a 311 plug.
The 308 die is large enough to not touch anything but the neck when adjusted correctly.
When you see your first cracked neck, its time for the blowtorch.
You already know that brass is individual to a rifle.
If you want to fine tune stuff, take a walk over to Karori and talk to Duncan.