Quote Originally Posted by short round View Post
Call X-caliber & get neck dia. specs , measure loaded round neck dia. Loaded round should be smaller by.002" or a little more.
Loaded round neck diameter is .3115-.312
Fired round is..318
I'm not sure what the standard expansion should be but a fresh bullet will slide freely through the neck.

Work was done by Jim at Apache. Havent got in touch yet.

Thinking it may be tooling marks with the throating reamer, but i haven't pulled the gun apart yet.