What does the left side of the stock look like? Often the cheek piece (or lack of one) can be a clue as to who the stock maker was. Quality/style of inletting can also be an indicator.

If the stock was made by a top tier stocker (doubtful IMO), such a mis-shapen clearance cut on the RH side of the stock below the receiver rail wouldn't have been tolerated. Aftermarket Bubba alteration perhaps?