Got my Forster original outside neck turner attachment 4 days ago, in the manual which came with it, for .308 Winchester cases SAAMI has .3435" outside neck diameter. I measured necks on the brass fired and its measures 0.346" my question: according to SAMI .308 should have max .3435" outside neck diameter, so if my fired cases coming out 0.346" does this considered to be none-standard chamber? Should I in the future trim my necks to 0.346" - 0.344"? When I neck size previously fired brass neck diameter of those with the bullet seated is 0.334" so it looks like +0.012" difference between them.
Thanks for any suggestion…
Thanks for any suggestion…