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we have lift off.

Ordered a 4d reamer and re-cut the chamber, you guys were right it was a slight diameter/taper difference. Cut and checked the chamber with two live cartridges. Cut, extract, clean, drop round in... I didnt have to go full depth with the reamer. I stopped with 1/8" or so of the rim cutting portion behind the barrel face. I did it by hand and held the barrel in a bench vise

I definately recommend you to use a lot of cutting fluid and clear chip every 2 full rotations. Test fired two shots, measured the brass, no deformation, bulges ect. They measure very close to new brass. However it does seem the gun is off face as the primers definately show signs of flow. I'll post pics of those later