Yes its a .319 neck in the chamber, yes will be turning the 28N brass. I am also giving the expanded 26N a quick lick too, just to remove the thicker part at the base of neck after expanding them.
Yes i believe that they do have considerably more throat errosion than the likes of the 7RM, i have taken that into account with my throating, and COAL etc and allowed for throat errosion so 1. my bullets will still be in the neck enough, and 2. my rounds will still fit the extended mag box when chasing the erroding lands. Oh the joys of over bore cartridges eh, but im sure it'll be a whole bunch of fun.
What bullets are you running, powder etc and velocity. PM if you like.
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