I'm pretty sure Remington never made a bolt face that size, the closest thing to it would be a 6.8PSC but those rifles are super rare and $$$. You'll have to get a .223 and have the bolt face opened up, get a .473 face and have it filled in, or get a different bolt from someplace like PTG. The clone actions may be another story. I've got a new 2024 production, used, 700 SPS in .223 that I'm thinking of selling, if you're interested. PM me if you want to chat about it.