The answer is in your rifle as it is and how well it shoots. If you merely moved a factory barreled action into the Magpul stock, no accurizing to the action, etc, and accuracy improved, chances are you won't gain enough more to make it worth your wile. What kind of groups are you seeing right now? Are you using factory or hand loads?
If it were my rifle I'd just shoot as is and see if it meets my needs. If it does, I'd just leave it as-is.
The stock has a "aluminized" bedding block built in. Shoot for a while, remove action, and look to see if the contact marks on the block and action are uniform. If so, bedding won't add anything. The block is designed to support the action on two parallel "rails" like a V-Block. If you want to "tune", try varying action screw torque values, increasing in 5 ft/lb increments or decreasing the same and shooting groups.