Re: 243 neck bush??
Diggler, I think he's asking about 243 Win, not 264.....
My recommendation:
+.014" Win neck thickness #1
+.014" Win neck thickness #2
+.243" bullet
=.271" total
-.002" neck tension
-.001" brass spring back
=.268 bushing size.
Might be a bit tight if your Win brass is .0145" but you could always buy both the .268" and .269" bushings and be good to go.