Its a bedding problem and a minute one at that to throw the 1st shot off that far. I would call Ruger customer service and have them look at it. There may not be enough clearance in the foreend tip. That barrel is also pencil thin and it may only take one shot to change the way it is sitting in the barrel channel. Those types of guns in almost all cases have some sort of shooting quirk. I would make sure the stock screws are tightened in the proper sequence. I had a 308 RSI that always sent the first shot off as well but not as bad as what your experiencing. I looked at everything and could never really figure out why it was doing that. Probably should have sent it back to ruger for a go over.