Thread: Brass FL Sizing Trouble

Greetings Joel,
The reason the case got longer is that as the case is FL sized it is squeezed down in diameter. This causes the case to become longer as the brass is squeezed toward the neck. From your description your resized cases now chamber with slight resistance which is exactly what you want. Lock your die at that. If you measure case lengths before and after sizing you will likely find they have grown slightly and may need to be trimmed before loading. This is all normal.
In my experience partial full length sizing, as you have done, works best in the 6.6x55 and neck sizing works best in the .308 and other less tapered cases. I would stick with the Lapua brass if you can. The US 6.5 brass has much thinner necks and would need a different bushing.
Regards Grandpamac