Shraps,
Thanks for the kind words. This forum is all about helping each others knowledge base grow. Just doing my part to help out.
By my calculations, your case neck wall thickness is .012" (using minimum dimensions as you stated above.
Neck turning .002" per side (.004" off diameter) should give you adaquate clearance for a .369-.370" diameter cast bullet.
The cases I use are Prvi 8x57 that I neck up to 9.3mm. This leaves the case neck .010" thick. This works ok for my 46A with its .368 bore and .393" chamber neck.
Both of my M46's have .370" bores. This does not allow for bullet release with a .372" bullet.