When I was working on that build and doing research I read that although the .35 Rem has a smaller rim it usually works fine with a normal .473 bolt. I think I even read that Remington uses the same bolt head for both. My Savage, originally a .308 Win, was hit and miss extracting .35 Rem brass so I sourced a custom head which is easy to switch on a Savage bolt. You might be OK with your Rem 700.