Thank you Mike for your help as always. First let me wish you a fast recovery. Im praying you continue to feel improvement a little bit each day.

I recasted the chamber and as well as re slugging the bore. Bore is the .318 in my opinion it varies a few thousands depending where I measure it. The casting actually measures little larger that the cases from the box of Ammo I purchased, this I would say is normal.
The thing that stands out to me is the shoulder is different not as sharp on the loaded ammo as the casting. Also it appears to me the bullet is not seated straight.
This may not be the reason it wont seat, as Im just not sure yet.
I have a picture of the casting an one round as well as the slug I took.
Thoughts on this is appreciated. Is there a chance its not a 8x57 JR?
[Linked Image from jpgbox.com]

[Linked Image from jpgbox.com]