A shim under the front of the action cut from cereal box will raise the barrel slightly and let you test if freefloating will make a difference. Sometimes a Remington stock will have a flat spot and the receiver can’t settle into the wood. A cereal shim will also snug up contact on the sides of the action. Sometimes it does help. Maybe one in 5 rifles shoot better with the shim. On rifles that shot better with the shim, none were improved above what the shim provided when fully glass bedded. It’s been a reliable method of testing the bedding since I was a kid in the 1970s.
I’m a big Remington fan, but of the 20 or so factory model 700s, none have regularly shot MOA 5-shot groups. There are many guys, often with varmint cartridges, who have sub MOA groups one after the other after the other, but I’ve not been that lucky, and assume a custom barrel is needed.