I have a .223 Savage 11/111 Trophy Hunter that I reload for. I usually neck size only. I have about 125 pieces of brass that were neck sized and are all prepped and primed and ready to load. I have a barrel on order from Jim at Apache and have a question about reloading. Can I use that neck sized brass once I switch the barrel? or do I need to redo it all using a full size die? If I have to resize, how safe is to deprime those cases with live primers?

The current barrel is a 1:9 twist factory shorter barrel. Jim is making me a barrel that is 1:7 twist and chambered to shoot the 80 AMAX.