The action needs a good bed around the action screws and the first few inches of the barrel. The recoil lug should NOT touch the bottom of it's mortise or the sides, only the rear of the lug should be in contact with the stock. The action screws should not be in contact with their holes at all and should not be bottomed in the action holes. The magazine box should have a tiny bit of play so that it doesn't bind when the action screws are tightened. This can cause warping of the action and poor accuracy. Poor bedding with a thumper such as the RUM can lead to stock splitting and even parts damage.. Glass bedding has been discussed in this thread before. Please review what has been said and if there are further questions, just ask.