Just outside neck turn.
For us Mag feeding type shooters, it's important you get the oversized mandrel to ensure everything is pushed out.
my Recommendation:
-deprime and clean cases
-anneal
-full length size with a non bushing die and use an expander ball
-get an oversized mandrel for your cutter
then neck turn. You will have to size your cases again but his time can just do the neck.
I know a neck turning set up isn't something everyone wants to buy because it's pretty much a one time use tool and done.
its also VERY tedious.. Takes about 1-1:30 minutes per case when you have a good rhythm. I'm willing to work with hiders neck turning cases. Gonna have to send me a PM for that.