Well, I just got back from a friends home an hour away or so. I took the rifle along and took the extractor and spring and screw out of the bolthead. After doing some measuring it was decided to remove some of the bolthead face by grinding. The bolthead was chucked into the lathe and the grinder attached and roughly 5 thousandths of an inch was ground off the face. After inserting a cartridge case with a .062 rim and utilizing a short piece of Plastigage, I now feel that the CHS is on the order of .066-.067 inch. With US cartridge rims being a wee bit thinner I am hoping this will work fine. Since i have been home an unfired WWII surplus catridge goes in and the bolt closes without any issues. I will head to the range later this week when the rain stops. I am thinking this will cure the problem with this old warhorse ... we will soon see.