One thing to consider is, if an epoxy bedded receiver with the barrel free floating doesn't shoot as accurate as with the barrel bedded, there's something wrong with the receiver bedding or how it's held to the stock that's the problem. There are more wrong ways to epoxy bed and fit a receiver than right ways.
US Navy Distinguished Marksman Badge 153
Former USA Palma Team Member
NRA High Power Long Range High Master
NRA Smallbore Prone Master