Thank you Patrick. I can do a molten sulphur chamber cast when I remove the action to check for actual size.

The cost of a press and dies would nearly match the cost of my 4 transitional rifles. So far I have got away with fireforming cases to match my chamber. Do you know of any case that will go into the 11.15x42R chamber to be thus formed? I fear that suitable cases for forming will be too long to go in as they are.