I am working up some loads for a 300wm. I purchased some brass - PPU and Nosler. The PPU is for working up some test loads for different bullets and powders. After inspecting the cases and reviewing the instructions I need to size at least the necks...Question - these cases are very thin ( not much brass there) are they safe to shoot? The Nosler's are great cases ( expensive) the instructions say they are ready to reload - Question- do I need to size them or can I just reload them? The Nosler will be the cases used for the finial LRH solution. Thanks for any intel you can share.