HUNT4ME, You are using pellets so you need to try using loose and finding the best load; chances are good that you can get 1 inch groups with a good scope and by working out the load.
Do not crank down the screws when reassembling stock and barrel mine shoots very good with 28 inch pounds and has shown no signs of stress with 150 gr loads.
You can do some very expensive damage in several ways trying to bed a gun if you dont know how and your does not sound like it would be an improvement. Lee