Rigby on a Rem 700 action

I was wondering if anyone has built a 416 Rigby or one of the big Wbys on a Rem 700 action and if so anything I should watch for?

I will be using a seekings precision bottom metal and magazine, so I should have the COL taken care of in that area. I am using a custom bolt with a Sako extractor and proper head size.

Anything else that I need to pay attention to? Advice would be appreciated.

I have been told that there is not enough metal left on the rim of the bolt face to be safe after the bolt has been reamed out to accept the cartridge head. Please verify this when you talk to a competent gunsmith about your project.